# Voyager subarch support
mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-i386/mach-voyager
-mcore-$(CONFIG_X86_VOYAGER) := arch/i386/mach-voyager
+mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager
# VISWS subarch support
mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-i386/mach-visws
+++ /dev/null
-#
-# Makefile for the linux kernel.
-#
-
-EXTRA_CFLAGS := -Iarch/i386/kernel
-obj-y := setup.o voyager_basic.o voyager_thread.o
-
-obj-$(CONFIG_SMP) += voyager_smp.o voyager_cat.o
+++ /dev/null
-/*
- * Machine specific setup for generic
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <asm/arch_hooks.h>
-#include <asm/voyager.h>
-#include <asm/e820.h>
-#include <asm/io.h>
-#include <asm/setup.h>
-
-void __init pre_intr_init_hook(void)
-{
- init_ISA_irqs();
-}
-
-/*
- * IRQ2 is cascade interrupt to second interrupt controller
- */
-static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
-
-void __init intr_init_hook(void)
-{
-#ifdef CONFIG_SMP
- smp_intr_init();
-#endif
-
- setup_irq(2, &irq2);
-}
-
-void __init pre_setup_arch_hook(void)
-{
- /* Voyagers run their CPUs from independent clocks, so disable
- * the TSC code because we can't sync them */
- tsc_disable = 1;
-}
-
-void __init trap_init_hook(void)
-{
-}
-
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
- .mask = CPU_MASK_NONE,
- .name = "timer"
-};
-
-void __init time_init_hook(void)
-{
- irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
- setup_irq(0, &irq0);
-}
-
-/* Hook for machine specific memory setup. */
-
-char * __init machine_specific_memory_setup(void)
-{
- char *who;
-
- who = "NOT VOYAGER";
-
- if(voyager_level == 5) {
- __u32 addr, length;
- int i;
-
- who = "Voyager-SUS";
-
- e820.nr_map = 0;
- for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
- add_memory_region(addr, length, E820_RAM);
- }
- return who;
- } else if(voyager_level == 4) {
- __u32 tom;
- __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
- /* select the DINO config space */
- outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
- /* Read DINO top of memory register */
- tom = ((inb(catbase + 0x4) & 0xf0) << 16)
- + ((inb(catbase + 0x5) & 0x7f) << 24);
-
- if(inb(catbase) != VOYAGER_DINO) {
- printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
- tom = (EXT_MEM_K)<<10;
- }
- who = "Voyager-TOM";
- add_memory_region(0, 0x9f000, E820_RAM);
- /* map from 1M to top of memory */
- add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
- /* FIXME: Should check the ASICs to see if I need to
- * take out the 8M window. Just do it at the moment
- * */
- add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
- return who;
- }
-
- who = "BIOS-e820";
-
- /*
- * Try to copy the BIOS-supplied E820-map.
- *
- * Otherwise fake a memory map; one section from 0k->640k,
- * the next section from 1mb->appropriate_mem_k
- */
- sanitize_e820_map(E820_MAP, &E820_MAP_NR);
- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
- unsigned long mem_size;
-
- /* compare results from other methods and take the greater */
- if (ALT_MEM_K < EXT_MEM_K) {
- mem_size = EXT_MEM_K;
- who = "BIOS-88";
- } else {
- mem_size = ALT_MEM_K;
- who = "BIOS-e801";
- }
-
- e820.nr_map = 0;
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
- }
- return who;
-}
+++ /dev/null
-/* Copyright (C) 1999,2001
- *
- * Author: J.E.J.Bottomley@HansenPartnership.com
- *
- * linux/arch/i386/kernel/voyager.c
- *
- * This file contains all the voyager specific routines for getting
- * initialisation of the architecture to function. For additional
- * features see:
- *
- * voyager_cat.c - Voyager CAT bus interface
- * voyager_smp.c - Voyager SMP hal (emulates linux smp.c)
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/sysrq.h>
-#include <linux/smp.h>
-#include <linux/nodemask.h>
-#include <asm/io.h>
-#include <asm/voyager.h>
-#include <asm/vic.h>
-#include <linux/pm.h>
-#include <asm/tlbflush.h>
-#include <asm/arch_hooks.h>
-#include <asm/i8253.h>
-
-/*
- * Power off function, if any
- */
-void (*pm_power_off)(void);
-EXPORT_SYMBOL(pm_power_off);
-
-int voyager_level = 0;
-
-struct voyager_SUS *voyager_SUS = NULL;
-
-#ifdef CONFIG_SMP
-static void
-voyager_dump(int dummy1, struct tty_struct *dummy3)
-{
- /* get here via a sysrq */
- voyager_smp_dump();
-}
-
-static struct sysrq_key_op sysrq_voyager_dump_op = {
- .handler = voyager_dump,
- .help_msg = "Voyager",
- .action_msg = "Dump Voyager Status",
-};
-#endif
-
-void
-voyager_detect(struct voyager_bios_info *bios)
-{
- if(bios->len != 0xff) {
- int class = (bios->class_1 << 8)
- | (bios->class_2 & 0xff);
-
- printk("Voyager System detected.\n"
- " Class %x, Revision %d.%d\n",
- class, bios->major, bios->minor);
- if(class == VOYAGER_LEVEL4)
- voyager_level = 4;
- else if(class < VOYAGER_LEVEL5_AND_ABOVE)
- voyager_level = 3;
- else
- voyager_level = 5;
- printk(" Architecture Level %d\n", voyager_level);
- if(voyager_level < 4)
- printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
- /* install the power off handler */
- pm_power_off = voyager_power_off;
-#ifdef CONFIG_SMP
- register_sysrq_key('v', &sysrq_voyager_dump_op);
-#endif
- } else {
- printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
- }
-}
-
-void
-voyager_system_interrupt(int cpl, void *dev_id)
-{
- printk("Voyager: detected system interrupt\n");
-}
-
-/* Routine to read information from the extended CMOS area */
-__u8
-voyager_extended_cmos_read(__u16 addr)
-{
- outb(addr & 0xff, 0x74);
- outb((addr >> 8) & 0xff, 0x75);
- return inb(0x76);
-}
-
-/* internal definitions for the SUS Click Map of memory */
-
-#define CLICK_ENTRIES 16
-#define CLICK_SIZE 4096 /* click to byte conversion for Length */
-
-typedef struct ClickMap {
- struct Entry {
- __u32 Address;
- __u32 Length;
- } Entry[CLICK_ENTRIES];
-} ClickMap_t;
-
-
-/* This routine is pretty much an awful hack to read the bios clickmap by
- * mapping it into page 0. There are usually three regions in the map:
- * Base Memory
- * Extended Memory
- * zero length marker for end of map
- *
- * Returns are 0 for failure and 1 for success on extracting region.
- */
-int __init
-voyager_memory_detect(int region, __u32 *start, __u32 *length)
-{
- int i;
- int retval = 0;
- __u8 cmos[4];
- ClickMap_t *map;
- unsigned long map_addr;
- unsigned long old;
-
- if(region >= CLICK_ENTRIES) {
- printk("Voyager: Illegal ClickMap region %d\n", region);
- return 0;
- }
-
- for(i = 0; i < sizeof(cmos); i++)
- cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i);
-
- map_addr = *(unsigned long *)cmos;
-
- /* steal page 0 for this */
- old = pg0[0];
- pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT);
- local_flush_tlb();
- /* now clear everything out but page 0 */
- map = (ClickMap_t *)(map_addr & (~PAGE_MASK));
-
- /* zero length is the end of the clickmap */
- if(map->Entry[region].Length != 0) {
- *length = map->Entry[region].Length * CLICK_SIZE;
- *start = map->Entry[region].Address;
- retval = 1;
- }
-
- /* replace the mapping */
- pg0[0] = old;
- local_flush_tlb();
- return retval;
-}
-
-/* voyager specific handling code for timer interrupts. Used to hand
- * off the timer tick to the SMP code, since the VIC doesn't have an
- * internal timer (The QIC does, but that's another story). */
-void
-voyager_timer_interrupt(void)
-{
- if((jiffies & 0x3ff) == 0) {
-
- /* There seems to be something flaky in either
- * hardware or software that is resetting the timer 0
- * count to something much higher than it should be
- * This seems to occur in the boot sequence, just
- * before root is mounted. Therefore, every 10
- * seconds or so, we sanity check the timer zero count
- * and kick it back to where it should be.
- *
- * FIXME: This is the most awful hack yet seen. I
- * should work out exactly what is interfering with
- * the timer count settings early in the boot sequence
- * and swiftly introduce it to something sharp and
- * pointy. */
- __u16 val;
-
- spin_lock(&i8253_lock);
-
- outb_p(0x00, 0x43);
- val = inb_p(0x40);
- val |= inb(0x40) << 8;
- spin_unlock(&i8253_lock);
-
- if(val > LATCH) {
- printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val);
- spin_lock(&i8253_lock);
- outb(0x34,0x43);
- outb_p(LATCH & 0xff , 0x40); /* LSB */
- outb(LATCH >> 8 , 0x40); /* MSB */
- spin_unlock(&i8253_lock);
- }
- }
-#ifdef CONFIG_SMP
- smp_vic_timer_interrupt();
-#endif
-}
-
-void
-voyager_power_off(void)
-{
- printk("VOYAGER Power Off\n");
-
- if(voyager_level == 5) {
- voyager_cat_power_off();
- } else if(voyager_level == 4) {
- /* This doesn't apparently work on most L4 machines,
- * but the specs say to do this to get automatic power
- * off. Unfortunately, if it doesn't power off the
- * machine, it ends up doing a cold restart, which
- * isn't really intended, so comment out the code */
-#if 0
- int port;
-
-
- /* enable the voyager Configuration Space */
- outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8,
- VOYAGER_MC_SETUP);
- /* the port for the power off flag is an offset from the
- floating base */
- port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21;
- /* set the power off flag */
- outb(inb(port) | 0x1, port);
-#endif
- }
- /* and wait for it to happen */
- local_irq_disable();
- for(;;)
- halt();
-}
-
-/* copied from process.c */
-static inline void
-kb_wait(void)
-{
- int i;
-
- for (i=0; i<0x10000; i++)
- if ((inb_p(0x64) & 0x02) == 0)
- break;
-}
-
-void
-machine_shutdown(void)
-{
- /* Architecture specific shutdown needed before a kexec */
-}
-
-void
-machine_restart(char *cmd)
-{
- printk("Voyager Warm Restart\n");
- kb_wait();
-
- if(voyager_level == 5) {
- /* write magic values to the RTC to inform system that
- * shutdown is beginning */
- outb(0x8f, 0x70);
- outb(0x5 , 0x71);
-
- udelay(50);
- outb(0xfe,0x64); /* pull reset low */
- } else if(voyager_level == 4) {
- __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
- __u8 basebd = inb(VOYAGER_MC_SETUP);
-
- outb(basebd | 0x08, VOYAGER_MC_SETUP);
- outb(0x02, catbase + 0x21);
- }
- local_irq_disable();
- for(;;)
- halt();
-}
-
-void
-machine_emergency_restart(void)
-{
- /*for now, just hook this to a warm restart */
- machine_restart(NULL);
-}
-
-void
-mca_nmi_hook(void)
-{
- __u8 dumpval __maybe_unused = inb(0xf823);
- __u8 swnmi __maybe_unused = inb(0xf813);
-
- /* FIXME: assume dump switch pressed */
- /* check to see if the dump switch was pressed */
- VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi));
- /* clear swnmi */
- outb(0xff, 0xf813);
- /* tell SUS to ignore dump */
- if(voyager_level == 5 && voyager_SUS != NULL) {
- if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) {
- voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND;
- voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS;
- udelay(1000);
- voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP;
- voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS;
- }
- }
- printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id());
- show_stack(NULL, NULL);
- show_state();
-}
-
-
-
-void
-machine_halt(void)
-{
- /* treat a halt like a power off */
- machine_power_off();
-}
-
-void machine_power_off(void)
-{
- if (pm_power_off)
- pm_power_off();
-}
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* Copyright (C) 1999,2001
- *
- * Author: J.E.J.Bottomley@HansenPartnership.com
- *
- * linux/arch/i386/kernel/voyager_cat.c
- *
- * This file contains all the logic for manipulating the CAT bus
- * in a level 5 machine.
- *
- * The CAT bus is a serial configuration and test bus. Its primary
- * uses are to probe the initial configuration of the system and to
- * diagnose error conditions when a system interrupt occurs. The low
- * level interface is fairly primitive, so most of this file consists
- * of bit shift manipulations to send and receive packets on the
- * serial bus */
-
-#include <linux/types.h>
-#include <linux/completion.h>
-#include <linux/sched.h>
-#include <asm/voyager.h>
-#include <asm/vic.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-
-#ifdef VOYAGER_CAT_DEBUG
-#define CDEBUG(x) printk x
-#else
-#define CDEBUG(x)
-#endif
-
-/* the CAT command port */
-#define CAT_CMD (sspb + 0xe)
-/* the CAT data port */
-#define CAT_DATA (sspb + 0xd)
-
-/* the internal cat functions */
-static void cat_pack(__u8 *msg, __u16 start_bit, __u8 *data,
- __u16 num_bits);
-static void cat_unpack(__u8 *msg, __u16 start_bit, __u8 *data,
- __u16 num_bits);
-static void cat_build_header(__u8 *header, const __u16 len,
- const __u16 smallest_reg_bits,
- const __u16 longest_reg_bits);
-static int cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp,
- __u8 reg, __u8 op);
-static int cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp,
- __u8 reg, __u8 *value);
-static int cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes,
- __u8 pad_bits);
-static int cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
- __u8 value);
-static int cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
- __u8 *value);
-static int cat_subread(voyager_module_t *modp, voyager_asic_t *asicp,
- __u16 offset, __u16 len, void *buf);
-static int cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
- __u8 reg, __u8 value);
-static int cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp);
-static int cat_connect(voyager_module_t *modp, voyager_asic_t *asicp);
-
-static inline const char *
-cat_module_name(int module_id)
-{
- switch(module_id) {
- case 0x10:
- return "Processor Slot 0";
- case 0x11:
- return "Processor Slot 1";
- case 0x12:
- return "Processor Slot 2";
- case 0x13:
- return "Processor Slot 4";
- case 0x14:
- return "Memory Slot 0";
- case 0x15:
- return "Memory Slot 1";
- case 0x18:
- return "Primary Microchannel";
- case 0x19:
- return "Secondary Microchannel";
- case 0x1a:
- return "Power Supply Interface";
- case 0x1c:
- return "Processor Slot 5";
- case 0x1d:
- return "Processor Slot 6";
- case 0x1e:
- return "Processor Slot 7";
- case 0x1f:
- return "Processor Slot 8";
- default:
- return "Unknown Module";
- }
-}
-
-static int sspb = 0; /* stores the super port location */
-int voyager_8slot = 0; /* set to true if a 51xx monster */
-
-voyager_module_t *voyager_cat_list;
-
-/* the I/O port assignments for the VIC and QIC */
-static struct resource vic_res = {
- .name = "Voyager Interrupt Controller",
- .start = 0xFC00,
- .end = 0xFC6F
-};
-static struct resource qic_res = {
- .name = "Quad Interrupt Controller",
- .start = 0xFC70,
- .end = 0xFCFF
-};
-
-/* This function is used to pack a data bit stream inside a message.
- * It writes num_bits of the data buffer in msg starting at start_bit.
- * Note: This function assumes that any unused bit in the data stream
- * is set to zero so that the ors will work correctly */
-static void
-cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
-{
- /* compute initial shift needed */
- const __u16 offset = start_bit % BITS_PER_BYTE;
- __u16 len = num_bits / BITS_PER_BYTE;
- __u16 byte = start_bit / BITS_PER_BYTE;
- __u16 residue = (num_bits % BITS_PER_BYTE) + offset;
- int i;
-
- /* adjust if we have more than a byte of residue */
- if(residue >= BITS_PER_BYTE) {
- residue -= BITS_PER_BYTE;
- len++;
- }
-
- /* clear out the bits. We assume here that if len==0 then
- * residue >= offset. This is always true for the catbus
- * operations */
- msg[byte] &= 0xff << (BITS_PER_BYTE - offset);
- msg[byte++] |= data[0] >> offset;
- if(len == 0)
- return;
- for(i = 1; i < len; i++)
- msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset))
- | (data[i] >> offset);
- if(residue != 0) {
- __u8 mask = 0xff >> residue;
- __u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset)
- | (data[i] >> offset);
-
- last_byte &= ~mask;
- msg[byte] &= mask;
- msg[byte] |= last_byte;
- }
- return;
-}
-/* unpack the data again (same arguments as cat_pack()). data buffer
- * must be zero populated.
- *
- * Function: given a message string move to start_bit and copy num_bits into
- * data (starting at bit 0 in data).
- */
-static void
-cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
-{
- /* compute initial shift needed */
- const __u16 offset = start_bit % BITS_PER_BYTE;
- __u16 len = num_bits / BITS_PER_BYTE;
- const __u8 last_bits = num_bits % BITS_PER_BYTE;
- __u16 byte = start_bit / BITS_PER_BYTE;
- int i;
-
- if(last_bits != 0)
- len++;
-
- /* special case: want < 8 bits from msg and we can get it from
- * a single byte of the msg */
- if(len == 0 && BITS_PER_BYTE - offset >= num_bits) {
- data[0] = msg[byte] << offset;
- data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
- return;
- }
- for(i = 0; i < len; i++) {
- /* this annoying if has to be done just in case a read of
- * msg one beyond the array causes a panic */
- if(offset != 0) {
- data[i] = msg[byte++] << offset;
- data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
- }
- else {
- data[i] = msg[byte++];
- }
- }
- /* do we need to truncate the final byte */
- if(last_bits != 0) {
- data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits);
- }
- return;
-}
-
-static void
-cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits,
- const __u16 longest_reg_bits)
-{
- int i;
- __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
- __u8 *last_byte = &header[len - 1];
-
- if(start_bit == 0)
- start_bit = 1; /* must have at least one bit in the hdr */
-
- for(i=0; i < len; i++)
- header[i] = 0;
-
- for(i = start_bit; i > 0; i--)
- *last_byte = ((*last_byte) << 1) + 1;
-
-}
-
-static int
-cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op)
-{
- __u8 parity, inst, inst_buf[4] = { 0 };
- __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
- __u16 ibytes, hbytes, padbits;
- int i;
-
- /*
- * Parity is the parity of the register number + 1 (READ_REGISTER
- * and WRITE_REGISTER always add '1' to the number of bits == 1)
- */
- parity = (__u8)(1 + (reg & 0x01) +
- ((__u8)(reg & 0x02) >> 1) +
- ((__u8)(reg & 0x04) >> 2) +
- ((__u8)(reg & 0x08) >> 3)) % 2;
-
- inst = ((parity << 7) | (reg << 2) | op);
-
- outb(VOYAGER_CAT_IRCYC, CAT_CMD);
- if(!modp->scan_path_connected) {
- if(asicp->asic_id != VOYAGER_CAT_ID) {
- printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
- return 1;
- }
- outb(VOYAGER_CAT_HEADER, CAT_DATA);
- outb(inst, CAT_DATA);
- if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
- CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
- return 1;
- }
- return 0;
- }
- ibytes = modp->inst_bits / BITS_PER_BYTE;
- if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
- padbits = BITS_PER_BYTE - padbits;
- ibytes++;
- }
- hbytes = modp->largest_reg / BITS_PER_BYTE;
- if(modp->largest_reg % BITS_PER_BYTE)
- hbytes++;
- CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
- /* initialise the instruction sequence to 0xff */
- for(i=0; i < ibytes + hbytes; i++)
- iseq[i] = 0xff;
- cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
- cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
- inst_buf[0] = inst;
- inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
- cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
-#ifdef VOYAGER_CAT_DEBUG
- printk("ins = 0x%x, iseq: ", inst);
- for(i=0; i< ibytes + hbytes; i++)
- printk("0x%x ", iseq[i]);
- printk("\n");
-#endif
- if(cat_shiftout(iseq, ibytes, hbytes, padbits)) {
- CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
- return 1;
- }
- CDEBUG(("CAT SHIFTOUT DONE\n"));
- return 0;
-}
-
-static int
-cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
- __u8 *value)
-{
- if(!modp->scan_path_connected) {
- if(asicp->asic_id != VOYAGER_CAT_ID) {
- CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
- return 1;
- }
- if(reg > VOYAGER_SUBADDRHI)
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- outb(VOYAGER_CAT_DRCYC, CAT_CMD);
- outb(VOYAGER_CAT_HEADER, CAT_DATA);
- *value = inb(CAT_DATA);
- outb(0xAA, CAT_DATA);
- if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
- CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
- return 1;
- }
- return 0;
- }
- else {
- __u16 sbits = modp->num_asics -1 + asicp->ireg_length;
- __u16 sbytes = sbits / BITS_PER_BYTE;
- __u16 tbytes;
- __u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE];
- __u8 padbits;
- int i;
-
- outb(VOYAGER_CAT_DRCYC, CAT_CMD);
-
- if((padbits = sbits % BITS_PER_BYTE) != 0) {
- padbits = BITS_PER_BYTE - padbits;
- sbytes++;
- }
- tbytes = asicp->ireg_length / BITS_PER_BYTE;
- if(asicp->ireg_length % BITS_PER_BYTE)
- tbytes++;
- CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
- tbytes, sbytes, padbits));
- cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
-
-
- for(i = tbytes - 1; i >= 0; i--) {
- outb(trailer[i], CAT_DATA);
- string[sbytes + i] = inb(CAT_DATA);
- }
-
- for(i = sbytes - 1; i >= 0; i--) {
- outb(0xaa, CAT_DATA);
- string[i] = inb(CAT_DATA);
- }
- *value = 0;
- cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length);
-#ifdef VOYAGER_CAT_DEBUG
- printk("value=0x%x, string: ", *value);
- for(i=0; i< tbytes+sbytes; i++)
- printk("0x%x ", string[i]);
- printk("\n");
-#endif
-
- /* sanity check the rest of the return */
- for(i=0; i < tbytes; i++) {
- __u8 input = 0;
-
- cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE);
- if(trailer[i] != input) {
- CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
- return 1;
- }
- }
- CDEBUG(("cat_getdata DONE\n"));
- return 0;
- }
-}
-
-static int
-cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
-{
- int i;
-
- for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
- outb(data[i], CAT_DATA);
-
- for(i = header_bytes - 1; i >= 0; i--) {
- __u8 header = 0;
- __u8 input;
-
- outb(data[i], CAT_DATA);
- input = inb(CAT_DATA);
- CDEBUG(("cat_shiftout: returned 0x%x\n", input));
- cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
- &header, BITS_PER_BYTE);
- if(input != header) {
- CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
- return 1;
- }
- }
- return 0;
-}
-
-static int
-cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
- __u8 reg, __u8 value)
-{
- outb(VOYAGER_CAT_DRCYC, CAT_CMD);
- if(!modp->scan_path_connected) {
- if(asicp->asic_id != VOYAGER_CAT_ID) {
- CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
- return 1;
- }
- outb(VOYAGER_CAT_HEADER, CAT_DATA);
- outb(value, CAT_DATA);
- if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
- CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
- return 1;
- }
- if(reg > VOYAGER_SUBADDRHI) {
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- outb(VOYAGER_CAT_END, CAT_CMD);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- }
-
- return 0;
- }
- else {
- __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
- __u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE;
- __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH],
- hseq[VOYAGER_MAX_REG_SIZE];
- int i;
-
- if((padbits = (modp->num_asics - 1
- + asicp->ireg_length) % BITS_PER_BYTE) != 0) {
- padbits = BITS_PER_BYTE - padbits;
- dbytes++;
- }
- if(asicp->ireg_length % BITS_PER_BYTE)
- hbytes++;
-
- cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
-
- for(i = 0; i < dbytes + hbytes; i++)
- dseq[i] = 0xff;
- CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
- dbytes, hbytes, padbits));
- cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
- hseq, hbytes * BITS_PER_BYTE);
- cat_pack(dseq, asicp->asic_location, &value,
- asicp->ireg_length);
-#ifdef VOYAGER_CAT_DEBUG
- printk("dseq ");
- for(i=0; i<hbytes+dbytes; i++) {
- printk("0x%x ", dseq[i]);
- }
- printk("\n");
-#endif
- return cat_shiftout(dseq, dbytes, hbytes, padbits);
- }
-}
-
-static int
-cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
- __u8 value)
-{
- if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
- return 1;
- return cat_senddata(modp, asicp, reg, value);
-}
-
-static int
-cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
- __u8 *value)
-{
- if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
- return 1;
- return cat_getdata(modp, asicp, reg, value);
-}
-
-static int
-cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
- __u16 len)
-{
- __u8 val;
-
- if(len > 1) {
- /* set auto increment */
- __u8 newval;
-
- if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
- CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
- return 1;
- }
- CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val));
- newval = val | VOYAGER_AUTO_INC;
- if(newval != val) {
- if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
- CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
- return 1;
- }
- }
- }
- if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) {
- CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
- return 1;
- }
- if(asicp->subaddr > VOYAGER_SUBADDR_LO) {
- if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) {
- CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
- return 1;
- }
- cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
- CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val));
- }
- cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val);
- CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val));
- return 0;
-}
-
-static int
-cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
- __u16 len, void *buf)
-{
- int i, retval;
-
- /* FIXME: need special actions for VOYAGER_CAT_ID here */
- if(asicp->asic_id == VOYAGER_CAT_ID) {
- CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n"));
- /* FIXME -- This is supposed to be handled better
- * There is a problem writing to the cat asic in the
- * PSI. The 30us delay seems to work, though */
- udelay(30);
- }
-
- if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
- printk("cat_subwrite: cat_subaddrsetup FAILED\n");
- return retval;
- }
-
- if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) {
- printk("cat_subwrite: cat_sendinst FAILED\n");
- return 1;
- }
- for(i = 0; i < len; i++) {
- if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) {
- printk("cat_subwrite: cat_sendata element at %d FAILED\n", i);
- return 1;
- }
- }
- return 0;
-}
-static int
-cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
- __u16 len, void *buf)
-{
- int i, retval;
-
- if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
- CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
- return retval;
- }
-
- if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
- CDEBUG(("cat_subread: cat_sendinst failed\n"));
- return 1;
- }
- for(i = 0; i < len; i++) {
- if(cat_getdata(modp, asicp, 0xFF,
- &((__u8 *)buf)[i])) {
- CDEBUG(("cat_subread: cat_getdata element %d failed\n", i));
- return 1;
- }
- }
- return 0;
-}
-
-
-/* buffer for storing EPROM data read in during initialisation */
-static __initdata __u8 eprom_buf[0xFFFF];
-static voyager_module_t *voyager_initial_module;
-
-/* Initialise the cat bus components. We assume this is called by the
- * boot cpu *after* all memory initialisation has been done (so we can
- * use kmalloc) but before smp initialisation, so we can probe the SMP
- * configuration and pick up necessary information. */
-void
-voyager_cat_init(void)
-{
- voyager_module_t **modpp = &voyager_initial_module;
- voyager_asic_t **asicpp;
- voyager_asic_t *qabc_asic = NULL;
- int i, j;
- unsigned long qic_addr = 0;
- __u8 qabc_data[0x20];
- __u8 num_submodules, val;
- voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0];
-
- __u8 cmos[4];
- unsigned long addr;
-
- /* initiallise the SUS mailbox */
- for(i=0; i<sizeof(cmos); i++)
- cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i);
- addr = *(unsigned long *)cmos;
- if((addr & 0xff000000) != 0xff000000) {
- printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr);
- } else {
- static struct resource res;
-
- res.name = "voyager SUS";
- res.start = addr;
- res.end = addr+0x3ff;
-
- request_resource(&iomem_resource, &res);
- voyager_SUS = (struct voyager_SUS *)
- ioremap(addr, 0x400);
- printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
- voyager_SUS->SUS_version);
- voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
- voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
- }
-
- /* clear the processor counts */
- voyager_extended_vic_processors = 0;
- voyager_quad_processors = 0;
-
-
-
- printk("VOYAGER: beginning CAT bus probe\n");
- /* set up the SuperSet Port Block which tells us where the
- * CAT communication port is */
- sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100;
- VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb));
-
- /* now find out if were 8 slot or normal */
- if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER)
- == EIGHT_SLOT_IDENTIFIER) {
- voyager_8slot = 1;
- printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n");
- }
-
- for(i = VOYAGER_MIN_MODULE;
- i <= VOYAGER_MAX_MODULE; i++) {
- __u8 input;
- int asic;
- __u16 eprom_size;
- __u16 sp_offset;
-
- outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
- outb(i, VOYAGER_CAT_CONFIG_PORT);
-
- /* check the presence of the module */
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- outb(VOYAGER_CAT_IRCYC, CAT_CMD);
- outb(VOYAGER_CAT_HEADER, CAT_DATA);
- /* stream series of alternating 1's and 0's to stimulate
- * response */
- outb(0xAA, CAT_DATA);
- input = inb(CAT_DATA);
- outb(VOYAGER_CAT_END, CAT_CMD);
- if(input != VOYAGER_CAT_HEADER) {
- continue;
- }
- CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i,
- cat_module_name(i)));
- *modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/
- if(*modpp == NULL) {
- printk("**WARNING** kmalloc failure in cat_init\n");
- continue;
- }
- memset(*modpp, 0, sizeof(voyager_module_t));
- /* need temporary asic for cat_subread. It will be
- * filled in correctly later */
- (*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/
- if((*modpp)->asic == NULL) {
- printk("**WARNING** kmalloc failure in cat_init\n");
- continue;
- }
- memset((*modpp)->asic, 0, sizeof(voyager_asic_t));
- (*modpp)->asic->asic_id = VOYAGER_CAT_ID;
- (*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI;
- (*modpp)->module_addr = i;
- (*modpp)->scan_path_connected = 0;
- if(i == VOYAGER_PSI) {
- /* Exception leg for modules with no EEPROM */
- printk("Module \"%s\"\n", cat_module_name(i));
- continue;
- }
-
- CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_disconnect(*modpp, (*modpp)->asic);
- if(cat_subread(*modpp, (*modpp)->asic,
- VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
- &eprom_size)) {
- printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- if(eprom_size > sizeof(eprom_buf)) {
- printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
- if(cat_subread(*modpp, (*modpp)->asic, 0,
- eprom_size, eprom_buf)) {
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
- cat_module_name(i), eprom_hdr->version_id,
- *((__u32 *)eprom_hdr->tracer), eprom_hdr->num_asics);
- (*modpp)->ee_size = eprom_hdr->ee_size;
- (*modpp)->num_asics = eprom_hdr->num_asics;
- asicpp = &((*modpp)->asic);
- sp_offset = eprom_hdr->scan_path_offset;
- /* All we really care about are the Quad cards. We
- * identify them because they are in a processor slot
- * and have only four asics */
- if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) {
- modpp = &((*modpp)->next);
- continue;
- }
- /* Now we know it's in a processor slot, does it have
- * a quad baseboard submodule */
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
- &num_submodules);
- /* lowest two bits, active low */
- num_submodules = ~(0xfc | num_submodules);
- CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules));
- if(num_submodules == 0) {
- /* fill in the dyadic extended processors */
- __u8 cpu = i & 0x07;
-
- printk("Module \"%s\": Dyadic Processor Card\n",
- cat_module_name(i));
- voyager_extended_vic_processors |= (1<<cpu);
- cpu += 4;
- voyager_extended_vic_processors |= (1<<cpu);
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
-
- /* now we want to read the asics on the first submodule,
- * which should be the quad base board */
-
- cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
- CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
- val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
- cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
-
- outb(VOYAGER_CAT_END, CAT_CMD);
-
-
- CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_disconnect(*modpp, (*modpp)->asic);
- if(cat_subread(*modpp, (*modpp)->asic,
- VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
- &eprom_size)) {
- printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- if(eprom_size > sizeof(eprom_buf)) {
- printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
- if(cat_subread(*modpp, (*modpp)->asic, 0,
- eprom_size, eprom_buf)) {
- outb(VOYAGER_CAT_END, CAT_CMD);
- continue;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- /* Now do everything for the QBB submodule 1 */
- (*modpp)->ee_size = eprom_hdr->ee_size;
- (*modpp)->num_asics = eprom_hdr->num_asics;
- asicpp = &((*modpp)->asic);
- sp_offset = eprom_hdr->scan_path_offset;
- /* get rid of the dummy CAT asic and read the real one */
- kfree((*modpp)->asic);
- for(asic=0; asic < (*modpp)->num_asics; asic++) {
- int j;
- voyager_asic_t *asicp = *asicpp
- = kzalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/
- voyager_sp_table_t *sp_table;
- voyager_at_t *asic_table;
- voyager_jtt_t *jtag_table;
-
- if(asicp == NULL) {
- printk("**WARNING** kmalloc failure in cat_init\n");
- continue;
- }
- asicpp = &(asicp->next);
- asicp->asic_location = asic;
- sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset);
- asicp->asic_id = sp_table->asic_id;
- asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset);
- for(j=0; j<4; j++)
- asicp->jtag_id[j] = asic_table->jtag_id[j];
- jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset);
- asicp->ireg_length = jtag_table->ireg_len;
- asicp->bit_location = (*modpp)->inst_bits;
- (*modpp)->inst_bits += asicp->ireg_length;
- if(asicp->ireg_length > (*modpp)->largest_reg)
- (*modpp)->largest_reg = asicp->ireg_length;
- if (asicp->ireg_length < (*modpp)->smallest_reg ||
- (*modpp)->smallest_reg == 0)
- (*modpp)->smallest_reg = asicp->ireg_length;
- CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
- asicp->asic_id, asicp->ireg_length,
- asicp->bit_location));
- if(asicp->asic_id == VOYAGER_QUAD_QABC) {
- CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
- qabc_asic = asicp;
- }
- sp_offset += sizeof(voyager_sp_table_t);
- }
- CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n",
- (*modpp)->inst_bits, (*modpp)->largest_reg,
- (*modpp)->smallest_reg));
- /* OK, now we have the QUAD ASICs set up, use them.
- * we need to:
- *
- * 1. Find the Memory area for the Quad CPIs.
- * 2. Find the Extended VIC processor
- * 3. Configure a second extended VIC processor (This
- * cannot be done for the 51xx.
- * */
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_connect(*modpp, (*modpp)->asic);
- CDEBUG(("CAT CONNECTED!!\n"));
- cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
- qic_addr = qabc_data[5] << 8;
- qic_addr = (qic_addr | qabc_data[6]) << 8;
- qic_addr = (qic_addr | qabc_data[7]) << 8;
- printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
- cat_module_name(i), qic_addr, qabc_data[8]);
-#if 0 /* plumbing fails---FIXME */
- if((qabc_data[8] & 0xf0) == 0) {
- /* FIXME: 32 way 8 CPU slot monster cannot be
- * plumbed this way---need to check for it */
-
- printk("Plumbing second Extended Quad Processor\n");
- /* second VIC line hardwired to Quad CPU 1 */
- qabc_data[8] |= 0x20;
- cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
-#ifdef VOYAGER_CAT_DEBUG
- /* verify plumbing */
- cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
- if((qabc_data[8] & 0xf0) == 0) {
- CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8]));
- }
-#endif
- }
-#endif
-
- {
- struct resource *res = kzalloc(sizeof(struct resource),GFP_KERNEL);
- res->name = kmalloc(128, GFP_KERNEL);
- sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i));
- res->start = qic_addr;
- res->end = qic_addr + 0x3ff;
- request_resource(&iomem_resource, res);
- }
-
- qic_addr = (unsigned long)ioremap(qic_addr, 0x400);
-
- for(j = 0; j < 4; j++) {
- __u8 cpu;
-
- if(voyager_8slot) {
- /* 8 slot has a different mapping,
- * each slot has only one vic line, so
- * 1 cpu in each slot must be < 8 */
- cpu = (i & 0x07) + j*8;
- } else {
- cpu = (i & 0x03) + j*4;
- }
- if( (qabc_data[8] & (1<<j))) {
- voyager_extended_vic_processors |= (1<<cpu);
- }
- if(qabc_data[8] & (1<<(j+4)) ) {
- /* Second SET register plumbed: Quad
- * card has two VIC connected CPUs.
- * Secondary cannot be booted as a VIC
- * CPU */
- voyager_extended_vic_processors |= (1<<cpu);
- voyager_allowed_boot_processors &= (~(1<<cpu));
- }
-
- voyager_quad_processors |= (1<<cpu);
- voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
- (qic_addr+(j<<8));
- CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
- (unsigned long)voyager_quad_cpi_addr[cpu]));
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
-
-
-
- *asicpp = NULL;
- modpp = &((*modpp)->next);
- }
- *modpp = NULL;
- printk("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n", voyager_extended_vic_processors, voyager_quad_processors, voyager_allowed_boot_processors);
- request_resource(&ioport_resource, &vic_res);
- if(voyager_quad_processors)
- request_resource(&ioport_resource, &qic_res);
- /* set up the front power switch */
-}
-
-int
-voyager_cat_readb(__u8 module, __u8 asic, int reg)
-{
- return 0;
-}
-
-static int
-cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp)
-{
- __u8 val;
- int err = 0;
-
- if(!modp->scan_path_connected)
- return 0;
- if(asicp->asic_id != VOYAGER_CAT_ID) {
- CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
- return 1;
- }
- err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
- if(err) {
- CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
- return err;
- }
- val &= VOYAGER_DISCONNECT_ASIC;
- err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
- if(err) {
- CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
- return err;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- modp->scan_path_connected = 0;
-
- return 0;
-}
-
-static int
-cat_connect(voyager_module_t *modp, voyager_asic_t *asicp)
-{
- __u8 val;
- int err = 0;
-
- if(modp->scan_path_connected)
- return 0;
- if(asicp->asic_id != VOYAGER_CAT_ID) {
- CDEBUG(("cat_connect: ASIC is not CAT\n"));
- return 1;
- }
-
- err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
- if(err) {
- CDEBUG(("cat_connect: failed to read SCANPATH\n"));
- return err;
- }
- val |= VOYAGER_CONNECT_ASIC;
- err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
- if(err) {
- CDEBUG(("cat_connect: failed to write SCANPATH\n"));
- return err;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- modp->scan_path_connected = 1;
-
- return 0;
-}
-
-void
-voyager_cat_power_off(void)
-{
- /* Power the machine off by writing to the PSI over the CAT
- * bus */
- __u8 data;
- voyager_module_t psi = { 0 };
- voyager_asic_t psi_asic = { 0 };
-
- psi.asic = &psi_asic;
- psi.asic->asic_id = VOYAGER_CAT_ID;
- psi.asic->subaddr = VOYAGER_SUBADDR_HI;
- psi.module_addr = VOYAGER_PSI;
- psi.scan_path_connected = 0;
-
- outb(VOYAGER_CAT_END, CAT_CMD);
- /* Connect the PSI to the CAT Bus */
- outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_disconnect(&psi, &psi_asic);
- /* Read the status */
- cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
- CDEBUG(("PSI STATUS 0x%x\n", data));
- /* These two writes are power off prep and perform */
- data = PSI_CLEAR;
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
- data = PSI_POWER_DOWN;
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
-}
-
-struct voyager_status voyager_status = { 0 };
-
-void
-voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data)
-{
- voyager_module_t psi = { 0 };
- voyager_asic_t psi_asic = { 0 };
-
- psi.asic = &psi_asic;
- psi.asic->asic_id = VOYAGER_CAT_ID;
- psi.asic->subaddr = VOYAGER_SUBADDR_HI;
- psi.module_addr = VOYAGER_PSI;
- psi.scan_path_connected = 0;
-
- outb(VOYAGER_CAT_END, CAT_CMD);
- /* Connect the PSI to the CAT Bus */
- outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_disconnect(&psi, &psi_asic);
- switch(cmd) {
- case VOYAGER_PSI_READ:
- cat_read(&psi, &psi_asic, reg, data);
- break;
- case VOYAGER_PSI_WRITE:
- cat_write(&psi, &psi_asic, reg, *data);
- break;
- case VOYAGER_PSI_SUBREAD:
- cat_subread(&psi, &psi_asic, reg, 1, data);
- break;
- case VOYAGER_PSI_SUBWRITE:
- cat_subwrite(&psi, &psi_asic, reg, 1, data);
- break;
- default:
- printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
- break;
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
-}
-
-void
-voyager_cat_do_common_interrupt(void)
-{
- /* This is caused either by a memory parity error or something
- * in the PSI */
- __u8 data;
- voyager_module_t psi = { 0 };
- voyager_asic_t psi_asic = { 0 };
- struct voyager_psi psi_reg;
- int i;
- re_read:
- psi.asic = &psi_asic;
- psi.asic->asic_id = VOYAGER_CAT_ID;
- psi.asic->subaddr = VOYAGER_SUBADDR_HI;
- psi.module_addr = VOYAGER_PSI;
- psi.scan_path_connected = 0;
-
- outb(VOYAGER_CAT_END, CAT_CMD);
- /* Connect the PSI to the CAT Bus */
- outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_disconnect(&psi, &psi_asic);
- /* Read the status. NOTE: Need to read *all* the PSI regs here
- * otherwise the cmn int will be reasserted */
- for(i = 0; i < sizeof(psi_reg.regs); i++) {
- cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]);
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
- if((psi_reg.regs.checkbit & 0x02) == 0) {
- psi_reg.regs.checkbit |= 0x02;
- cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
- printk("VOYAGER RE-READ PSI\n");
- goto re_read;
- }
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- for(i = 0; i < sizeof(psi_reg.subregs); i++) {
- /* This looks strange, but the PSI doesn't do auto increment
- * correctly */
- cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i,
- 1, &((__u8 *)&psi_reg.subregs)[i]);
- }
- outb(VOYAGER_CAT_END, CAT_CMD);
-#ifdef VOYAGER_CAT_DEBUG
- printk("VOYAGER PSI: ");
- for(i=0; i<sizeof(psi_reg.regs); i++)
- printk("%02x ", ((__u8 *)&psi_reg.regs)[i]);
- printk("\n ");
- for(i=0; i<sizeof(psi_reg.subregs); i++)
- printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]);
- printk("\n");
-#endif
- if(psi_reg.regs.intstatus & PSI_MON) {
- /* switch off or power fail */
-
- if(psi_reg.subregs.supply & PSI_SWITCH_OFF) {
- if(voyager_status.switch_off) {
- printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n");
- voyager_cat_power_off();
- /* not reached */
- } else {
- printk(KERN_ERR "Voyager front panel switch turned off\n");
- voyager_status.switch_off = 1;
- voyager_status.request_from_kernel = 1;
- wake_up_process(voyager_thread);
- }
- /* Tell the hardware we're taking care of the
- * shutdown, otherwise it will power the box off
- * within 3 seconds of the switch being pressed and,
- * which is much more important to us, continue to
- * assert the common interrupt */
- data = PSI_CLR_SWITCH_OFF;
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
- 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
- } else {
-
- VDEBUG(("Voyager ac fail reg 0x%x\n",
- psi_reg.subregs.ACfail));
- if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
- /* No further update */
- return;
- }
-#if 0
- /* Don't bother trying to find out who failed.
- * FIXME: This probably makes the code incorrect on
- * anything other than a 345x */
- for(i=0; i< 5; i++) {
- if( psi_reg.subregs.ACfail &(1<<i)) {
- break;
- }
- }
- printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
-#endif
- /* DON'T do this: it shuts down the AC PSI
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- data = PSI_MASK_MASK | i;
- cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
- 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
- */
- printk(KERN_ERR "Voyager AC power failure\n");
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- data = PSI_COLD_START;
- cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
- 1, &data);
- outb(VOYAGER_CAT_END, CAT_CMD);
- voyager_status.power_fail = 1;
- voyager_status.request_from_kernel = 1;
- wake_up_process(voyager_thread);
- }
-
-
- } else if(psi_reg.regs.intstatus & PSI_FAULT) {
- /* Major fault! */
- printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n");
- voyager_cat_power_off();
- /* not reached */
- } else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
- | PSI_CURRENT | PSI_DVM
- | PSI_PSCFAULT | PSI_STAT_CHG)) {
- /* other psi fault */
-
- printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
- /* clear the PSI fault */
- outb(VOYAGER_CAT_RUN, CAT_CMD);
- cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
- outb(VOYAGER_CAT_END, CAT_CMD);
- }
-}
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* Copyright (C) 1999,2001
- *
- * Author: J.E.J.Bottomley@HansenPartnership.com
- *
- * linux/arch/i386/kernel/voyager_smp.c
- *
- * This file provides all the same external entries as smp.c but uses
- * the voyager hal to provide the functionality
- */
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/kernel_stat.h>
-#include <linux/delay.h>
-#include <linux/mc146818rtc.h>
-#include <linux/cache.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/bootmem.h>
-#include <linux/completion.h>
-#include <asm/desc.h>
-#include <asm/voyager.h>
-#include <asm/vic.h>
-#include <asm/mtrr.h>
-#include <asm/pgalloc.h>
-#include <asm/tlbflush.h>
-#include <asm/arch_hooks.h>
-
-/* TLB state -- visible externally, indexed physically */
-DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0 };
-
-/* CPU IRQ affinity -- set to all ones initially */
-static unsigned long cpu_irq_affinity[NR_CPUS] __cacheline_aligned = { [0 ... NR_CPUS-1] = ~0UL };
-
-/* per CPU data structure (for /proc/cpuinfo et al), visible externally
- * indexed physically */
-struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
-EXPORT_SYMBOL(cpu_data);
-
-/* physical ID of the CPU used to boot the system */
-unsigned char boot_cpu_id;
-
-/* The memory line addresses for the Quad CPIs */
-struct voyager_qic_cpi *voyager_quad_cpi_addr[NR_CPUS] __cacheline_aligned;
-
-/* The masks for the Extended VIC processors, filled in by cat_init */
-__u32 voyager_extended_vic_processors = 0;
-
-/* Masks for the extended Quad processors which cannot be VIC booted */
-__u32 voyager_allowed_boot_processors = 0;
-
-/* The mask for the Quad Processors (both extended and non-extended) */
-__u32 voyager_quad_processors = 0;
-
-/* Total count of live CPUs, used in process.c to display
- * the CPU information and in irq.c for the per CPU irq
- * activity count. Finally exported by i386_ksyms.c */
-static int voyager_extended_cpus = 1;
-
-/* Have we found an SMP box - used by time.c to do the profiling
- interrupt for timeslicing; do not set to 1 until the per CPU timer
- interrupt is active */
-int smp_found_config = 0;
-
-/* Used for the invalidate map that's also checked in the spinlock */
-static volatile unsigned long smp_invalidate_needed;
-
-/* Bitmask of currently online CPUs - used by setup.c for
- /proc/cpuinfo, visible externally but still physical */
-cpumask_t cpu_online_map = CPU_MASK_NONE;
-EXPORT_SYMBOL(cpu_online_map);
-
-/* Bitmask of CPUs present in the system - exported by i386_syms.c, used
- * by scheduler but indexed physically */
-cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
-
-
-/* The internal functions */
-static void send_CPI(__u32 cpuset, __u8 cpi);
-static void ack_CPI(__u8 cpi);
-static int ack_QIC_CPI(__u8 cpi);
-static void ack_special_QIC_CPI(__u8 cpi);
-static void ack_VIC_CPI(__u8 cpi);
-static void send_CPI_allbutself(__u8 cpi);
-static void mask_vic_irq(unsigned int irq);
-static void unmask_vic_irq(unsigned int irq);
-static unsigned int startup_vic_irq(unsigned int irq);
-static void enable_local_vic_irq(unsigned int irq);
-static void disable_local_vic_irq(unsigned int irq);
-static void before_handle_vic_irq(unsigned int irq);
-static void after_handle_vic_irq(unsigned int irq);
-static void set_vic_irq_affinity(unsigned int irq, cpumask_t mask);
-static void ack_vic_irq(unsigned int irq);
-static void vic_enable_cpi(void);
-static void do_boot_cpu(__u8 cpuid);
-static void do_quad_bootstrap(void);
-
-int hard_smp_processor_id(void);
-int safe_smp_processor_id(void);
-
-/* Inline functions */
-static inline void
-send_one_QIC_CPI(__u8 cpu, __u8 cpi)
-{
- voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi =
- (smp_processor_id() << 16) + cpi;
-}
-
-static inline void
-send_QIC_CPI(__u32 cpuset, __u8 cpi)
-{
- int cpu;
-
- for_each_online_cpu(cpu) {
- if(cpuset & (1<<cpu)) {
-#ifdef VOYAGER_DEBUG
- if(!cpu_isset(cpu, cpu_online_map))
- VDEBUG(("CPU%d sending cpi %d to CPU%d not in cpu_online_map\n", hard_smp_processor_id(), cpi, cpu));
-#endif
- send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET);
- }
- }
-}
-
-static inline void
-wrapper_smp_local_timer_interrupt(void)
-{
- irq_enter();
- smp_local_timer_interrupt();
- irq_exit();
-}
-
-static inline void
-send_one_CPI(__u8 cpu, __u8 cpi)
-{
- if(voyager_quad_processors & (1<<cpu))
- send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET);
- else
- send_CPI(1<<cpu, cpi);
-}
-
-static inline void
-send_CPI_allbutself(__u8 cpi)
-{
- __u8 cpu = smp_processor_id();
- __u32 mask = cpus_addr(cpu_online_map)[0] & ~(1 << cpu);
- send_CPI(mask, cpi);
-}
-
-static inline int
-is_cpu_quad(void)
-{
- __u8 cpumask = inb(VIC_PROC_WHO_AM_I);
- return ((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER);
-}
-
-static inline int
-is_cpu_extended(void)
-{
- __u8 cpu = hard_smp_processor_id();
-
- return(voyager_extended_vic_processors & (1<<cpu));
-}
-
-static inline int
-is_cpu_vic_boot(void)
-{
- __u8 cpu = hard_smp_processor_id();
-
- return(voyager_extended_vic_processors
- & voyager_allowed_boot_processors & (1<<cpu));
-}
-
-
-static inline void
-ack_CPI(__u8 cpi)
-{
- switch(cpi) {
- case VIC_CPU_BOOT_CPI:
- if(is_cpu_quad() && !is_cpu_vic_boot())
- ack_QIC_CPI(cpi);
- else
- ack_VIC_CPI(cpi);
- break;
- case VIC_SYS_INT:
- case VIC_CMN_INT:
- /* These are slightly strange. Even on the Quad card,
- * They are vectored as VIC CPIs */
- if(is_cpu_quad())
- ack_special_QIC_CPI(cpi);
- else
- ack_VIC_CPI(cpi);
- break;
- default:
- printk("VOYAGER ERROR: CPI%d is in common CPI code\n", cpi);
- break;
- }
-}
-
-/* local variables */
-
-/* The VIC IRQ descriptors -- these look almost identical to the
- * 8259 IRQs except that masks and things must be kept per processor
- */
-static struct irq_chip vic_chip = {
- .name = "VIC",
- .startup = startup_vic_irq,
- .mask = mask_vic_irq,
- .unmask = unmask_vic_irq,
- .set_affinity = set_vic_irq_affinity,
-};
-
-/* used to count up as CPUs are brought on line (starts at 0) */
-static int cpucount = 0;
-
-/* steal a page from the bottom of memory for the trampoline and
- * squirrel its address away here. This will be in kernel virtual
- * space */
-static __u32 trampoline_base;
-
-/* The per cpu profile stuff - used in smp_local_timer_interrupt */
-static DEFINE_PER_CPU(int, prof_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_old_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_counter) = 1;
-
-/* the map used to check if a CPU has booted */
-static __u32 cpu_booted_map;
-
-/* the synchronize flag used to hold all secondary CPUs spinning in
- * a tight loop until the boot sequence is ready for them */
-static cpumask_t smp_commenced_mask = CPU_MASK_NONE;
-
-/* This is for the new dynamic CPU boot code */
-cpumask_t cpu_callin_map = CPU_MASK_NONE;
-cpumask_t cpu_callout_map = CPU_MASK_NONE;
-EXPORT_SYMBOL(cpu_callout_map);
-cpumask_t cpu_possible_map = CPU_MASK_NONE;
-EXPORT_SYMBOL(cpu_possible_map);
-
-/* The per processor IRQ masks (these are usually kept in sync) */
-static __u16 vic_irq_mask[NR_CPUS] __cacheline_aligned;
-
-/* the list of IRQs to be enabled by the VIC_ENABLE_IRQ_CPI */
-static __u16 vic_irq_enable_mask[NR_CPUS] __cacheline_aligned = { 0 };
-
-/* Lock for enable/disable of VIC interrupts */
-static __cacheline_aligned DEFINE_SPINLOCK(vic_irq_lock);
-
-/* The boot processor is correctly set up in PC mode when it
- * comes up, but the secondaries need their master/slave 8259
- * pairs initializing correctly */
-
-/* Interrupt counters (per cpu) and total - used to try to
- * even up the interrupt handling routines */
-static long vic_intr_total = 0;
-static long vic_intr_count[NR_CPUS] __cacheline_aligned = { 0 };
-static unsigned long vic_tick[NR_CPUS] __cacheline_aligned = { 0 };
-
-/* Since we can only use CPI0, we fake all the other CPIs */
-static unsigned long vic_cpi_mailbox[NR_CPUS] __cacheline_aligned;
-
-/* debugging routine to read the isr of the cpu's pic */
-static inline __u16
-vic_read_isr(void)
-{
- __u16 isr;
-
- outb(0x0b, 0xa0);
- isr = inb(0xa0) << 8;
- outb(0x0b, 0x20);
- isr |= inb(0x20);
-
- return isr;
-}
-
-static __init void
-qic_setup(void)
-{
- if(!is_cpu_quad()) {
- /* not a quad, no setup */
- return;
- }
- outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0);
- outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1);
-
- if(is_cpu_extended()) {
- /* the QIC duplicate of the VIC base register */
- outb(VIC_DEFAULT_CPI_BASE, QIC_VIC_CPI_BASE_REGISTER);
- outb(QIC_DEFAULT_CPI_BASE, QIC_CPI_BASE_REGISTER);
-
- /* FIXME: should set up the QIC timer and memory parity
- * error vectors here */
- }
-}
-
-static __init void
-vic_setup_pic(void)
-{
- outb(1, VIC_REDIRECT_REGISTER_1);
- /* clear the claim registers for dynamic routing */
- outb(0, VIC_CLAIM_REGISTER_0);
- outb(0, VIC_CLAIM_REGISTER_1);
-
- outb(0, VIC_PRIORITY_REGISTER);
- /* Set the Primary and Secondary Microchannel vector
- * bases to be the same as the ordinary interrupts
- *
- * FIXME: This would be more efficient using separate
- * vectors. */
- outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE);
- outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE);
- /* Now initiallise the master PIC belonging to this CPU by
- * sending the four ICWs */
-
- /* ICW1: level triggered, ICW4 needed */
- outb(0x19, 0x20);
-
- /* ICW2: vector base */
- outb(FIRST_EXTERNAL_VECTOR, 0x21);
-
- /* ICW3: slave at line 2 */
- outb(0x04, 0x21);
-
- /* ICW4: 8086 mode */
- outb(0x01, 0x21);
-
- /* now the same for the slave PIC */
-
- /* ICW1: level trigger, ICW4 needed */
- outb(0x19, 0xA0);
-
- /* ICW2: slave vector base */
- outb(FIRST_EXTERNAL_VECTOR + 8, 0xA1);
-
- /* ICW3: slave ID */
- outb(0x02, 0xA1);
-
- /* ICW4: 8086 mode */
- outb(0x01, 0xA1);
-}
-
-static void
-do_quad_bootstrap(void)
-{
- if(is_cpu_quad() && is_cpu_vic_boot()) {
- int i;
- unsigned long flags;
- __u8 cpuid = hard_smp_processor_id();
-
- local_irq_save(flags);
-
- for(i = 0; i<4; i++) {
- /* FIXME: this would be >>3 &0x7 on the 32 way */
- if(((cpuid >> 2) & 0x03) == i)
- /* don't lower our own mask! */
- continue;
-
- /* masquerade as local Quad CPU */
- outb(QIC_CPUID_ENABLE | i, QIC_PROCESSOR_ID);
- /* enable the startup CPI */
- outb(QIC_BOOT_CPI_MASK, QIC_MASK_REGISTER1);
- /* restore cpu id */
- outb(0, QIC_PROCESSOR_ID);
- }
- local_irq_restore(flags);
- }
-}
-
-
-/* Set up all the basic stuff: read the SMP config and make all the
- * SMP information reflect only the boot cpu. All others will be
- * brought on-line later. */
-void __init
-find_smp_config(void)
-{
- int i;
-
- boot_cpu_id = hard_smp_processor_id();
-
- printk("VOYAGER SMP: Boot cpu is %d\n", boot_cpu_id);
-
- /* initialize the CPU structures (moved from smp_boot_cpus) */
- for(i=0; i<NR_CPUS; i++) {
- cpu_irq_affinity[i] = ~0;
- }
- cpu_online_map = cpumask_of_cpu(boot_cpu_id);
-
- /* The boot CPU must be extended */
- voyager_extended_vic_processors = 1<<boot_cpu_id;
- /* initially, all of the first 8 cpu's can boot */
- voyager_allowed_boot_processors = 0xff;
- /* set up everything for just this CPU, we can alter
- * this as we start the other CPUs later */
- /* now get the CPU disposition from the extended CMOS */
- cpus_addr(phys_cpu_present_map)[0] = voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK);
- cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 1) << 8;
- cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 2) << 16;
- cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 3) << 24;
- cpu_possible_map = phys_cpu_present_map;
- printk("VOYAGER SMP: phys_cpu_present_map = 0x%lx\n", cpus_addr(phys_cpu_present_map)[0]);
- /* Here we set up the VIC to enable SMP */
- /* enable the CPIs by writing the base vector to their register */
- outb(VIC_DEFAULT_CPI_BASE, VIC_CPI_BASE_REGISTER);
- outb(1, VIC_REDIRECT_REGISTER_1);
- /* set the claim registers for static routing --- Boot CPU gets
- * all interrupts untill all other CPUs started */
- outb(0xff, VIC_CLAIM_REGISTER_0);
- outb(0xff, VIC_CLAIM_REGISTER_1);
- /* Set the Primary and Secondary Microchannel vector
- * bases to be the same as the ordinary interrupts
- *
- * FIXME: This would be more efficient using separate
- * vectors. */
- outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE);
- outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE);
-
- /* Finally tell the firmware that we're driving */
- outb(inb(VOYAGER_SUS_IN_CONTROL_PORT) | VOYAGER_IN_CONTROL_FLAG,
- VOYAGER_SUS_IN_CONTROL_PORT);
-
- current_thread_info()->cpu = boot_cpu_id;
- x86_write_percpu(cpu_number, boot_cpu_id);
-}
-
-/*
- * The bootstrap kernel entry code has set these up. Save them
- * for a given CPU, id is physical */
-void __init
-smp_store_cpu_info(int id)
-{
- struct cpuinfo_x86 *c=&cpu_data[id];
-
- *c = boot_cpu_data;
-
- identify_secondary_cpu(c);
-}
-
-/* set up the trampoline and return the physical address of the code */
-static __u32 __init
-setup_trampoline(void)
-{
- /* these two are global symbols in trampoline.S */
- extern __u8 trampoline_end[];
- extern __u8 trampoline_data[];
-
- memcpy((__u8 *)trampoline_base, trampoline_data,
- trampoline_end - trampoline_data);
- return virt_to_phys((__u8 *)trampoline_base);
-}
-
-/* Routine initially called when a non-boot CPU is brought online */
-static void __init
-start_secondary(void *unused)
-{
- __u8 cpuid = hard_smp_processor_id();
- /* external functions not defined in the headers */
- extern void calibrate_delay(void);
-
- cpu_init();
-
- /* OK, we're in the routine */
- ack_CPI(VIC_CPU_BOOT_CPI);
-
- /* setup the 8259 master slave pair belonging to this CPU ---
- * we won't actually receive any until the boot CPU
- * relinquishes it's static routing mask */
- vic_setup_pic();
-
- qic_setup();
-
- if(is_cpu_quad() && !is_cpu_vic_boot()) {
- /* clear the boot CPI */
- __u8 dummy;
-
- dummy = voyager_quad_cpi_addr[cpuid]->qic_cpi[VIC_CPU_BOOT_CPI].cpi;
- printk("read dummy %d\n", dummy);
- }
-
- /* lower the mask to receive CPIs */
- vic_enable_cpi();
-
- VDEBUG(("VOYAGER SMP: CPU%d, stack at about %p\n", cpuid, &cpuid));
-
- /* enable interrupts */
- local_irq_enable();
-
- /* get our bogomips */
- calibrate_delay();
-
- /* save our processor parameters */
- smp_store_cpu_info(cpuid);
-
- /* if we're a quad, we may need to bootstrap other CPUs */
- do_quad_bootstrap();
-
- /* FIXME: this is rather a poor hack to prevent the CPU
- * activating softirqs while it's supposed to be waiting for
- * permission to proceed. Without this, the new per CPU stuff
- * in the softirqs will fail */
- local_irq_disable();
- cpu_set(cpuid, cpu_callin_map);
-
- /* signal that we're done */
- cpu_booted_map = 1;
-
- while (!cpu_isset(cpuid, smp_commenced_mask))
- rep_nop();
- local_irq_enable();
-
- local_flush_tlb();
-
- cpu_set(cpuid, cpu_online_map);
- wmb();
- cpu_idle();
-}
-
-
-/* Routine to kick start the given CPU and wait for it to report ready
- * (or timeout in startup). When this routine returns, the requested
- * CPU is either fully running and configured or known to be dead.
- *
- * We call this routine sequentially 1 CPU at a time, so no need for
- * locking */
-
-static void __init
-do_boot_cpu(__u8 cpu)
-{
- struct task_struct *idle;
- int timeout;
- unsigned long flags;
- int quad_boot = (1<<cpu) & voyager_quad_processors
- & ~( voyager_extended_vic_processors
- & voyager_allowed_boot_processors);
-
- /* This is an area in head.S which was used to set up the
- * initial kernel stack. We need to alter this to give the
- * booting CPU a new stack (taken from its idle process) */
- extern struct {
- __u8 *esp;
- unsigned short ss;
- } stack_start;
- /* This is the format of the CPI IDT gate (in real mode) which
- * we're hijacking to boot the CPU */
- union IDTFormat {
- struct seg {
- __u16 Offset;
- __u16 Segment;
- } idt;
- __u32 val;
- } hijack_source;
-
- __u32 *hijack_vector;
- __u32 start_phys_address = setup_trampoline();
-
- /* There's a clever trick to this: The linux trampoline is
- * compiled to begin at absolute location zero, so make the
- * address zero but have the data segment selector compensate
- * for the actual address */
- hijack_source.idt.Offset = start_phys_address & 0x000F;
- hijack_source.idt.Segment = (start_phys_address >> 4) & 0xFFFF;
-
- cpucount++;
- alternatives_smp_switch(1);
-
- idle = fork_idle(cpu);
- if(IS_ERR(idle))
- panic("failed fork for CPU%d", cpu);
- idle->thread.eip = (unsigned long) start_secondary;
- /* init_tasks (in sched.c) is indexed logically */
- stack_start.esp = (void *) idle->thread.esp;
-
- init_gdt(cpu);
- per_cpu(current_task, cpu) = idle;
- early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
- irq_ctx_init(cpu);
-
- /* Note: Don't modify initial ss override */
- VDEBUG(("VOYAGER SMP: Booting CPU%d at 0x%lx[%x:%x], stack %p\n", cpu,
- (unsigned long)hijack_source.val, hijack_source.idt.Segment,
- hijack_source.idt.Offset, stack_start.esp));
-
- /* init lowmem identity mapping */
- clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
- min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));
- flush_tlb_all();
-
- if(quad_boot) {
- printk("CPU %d: non extended Quad boot\n", cpu);
- hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + QIC_DEFAULT_CPI_BASE)*4);
- *hijack_vector = hijack_source.val;
- } else {
- printk("CPU%d: extended VIC boot\n", cpu);
- hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + VIC_DEFAULT_CPI_BASE)*4);
- *hijack_vector = hijack_source.val;
- /* VIC errata, may also receive interrupt at this address */
- hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_ERRATA_CPI + VIC_DEFAULT_CPI_BASE)*4);
- *hijack_vector = hijack_source.val;
- }
- /* All non-boot CPUs start with interrupts fully masked. Need
- * to lower the mask of the CPI we're about to send. We do
- * this in the VIC by masquerading as the processor we're
- * about to boot and lowering its interrupt mask */
- local_irq_save(flags);
- if(quad_boot) {
- send_one_QIC_CPI(cpu, VIC_CPU_BOOT_CPI);
- } else {
- outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID);
- /* here we're altering registers belonging to `cpu' */
-
- outb(VIC_BOOT_INTERRUPT_MASK, 0x21);
- /* now go back to our original identity */
- outb(boot_cpu_id, VIC_PROCESSOR_ID);
-
- /* and boot the CPU */
-
- send_CPI((1<<cpu), VIC_CPU_BOOT_CPI);
- }
- cpu_booted_map = 0;
- local_irq_restore(flags);
-
- /* now wait for it to become ready (or timeout) */
- for(timeout = 0; timeout < 50000; timeout++) {
- if(cpu_booted_map)
- break;
- udelay(100);
- }
- /* reset the page table */
- zap_low_mappings();
-
- if (cpu_booted_map) {
- VDEBUG(("CPU%d: Booted successfully, back in CPU %d\n",
- cpu, smp_processor_id()));
-
- printk("CPU%d: ", cpu);
- print_cpu_info(&cpu_data[cpu]);
- wmb();
- cpu_set(cpu, cpu_callout_map);
- cpu_set(cpu, cpu_present_map);
- }
- else {
- printk("CPU%d FAILED TO BOOT: ", cpu);
- if (*((volatile unsigned char *)phys_to_virt(start_phys_address))==0xA5)
- printk("Stuck.\n");
- else
- printk("Not responding.\n");
-
- cpucount--;
- }
-}
-
-void __init
-smp_boot_cpus(void)
-{
- int i;
-
- /* CAT BUS initialisation must be done after the memory */
- /* FIXME: The L4 has a catbus too, it just needs to be
- * accessed in a totally different way */
- if(voyager_level == 5) {
- voyager_cat_init();
-
- /* now that the cat has probed the Voyager System Bus, sanity
- * check the cpu map */
- if( ((voyager_quad_processors | voyager_extended_vic_processors)
- & cpus_addr(phys_cpu_present_map)[0]) != cpus_addr(phys_cpu_present_map)[0]) {
- /* should panic */
- printk("\n\n***WARNING*** Sanity check of CPU present map FAILED\n");
- }
- } else if(voyager_level == 4)
- voyager_extended_vic_processors = cpus_addr(phys_cpu_present_map)[0];
-
- /* this sets up the idle task to run on the current cpu */
- voyager_extended_cpus = 1;
- /* Remove the global_irq_holder setting, it triggers a BUG() on
- * schedule at the moment */
- //global_irq_holder = boot_cpu_id;
-
- /* FIXME: Need to do something about this but currently only works
- * on CPUs with a tsc which none of mine have.
- smp_tune_scheduling();
- */
- smp_store_cpu_info(boot_cpu_id);
- printk("CPU%d: ", boot_cpu_id);
- print_cpu_info(&cpu_data[boot_cpu_id]);
-
- if(is_cpu_quad()) {
- /* booting on a Quad CPU */
- printk("VOYAGER SMP: Boot CPU is Quad\n");
- qic_setup();
- do_quad_bootstrap();
- }
-
- /* enable our own CPIs */
- vic_enable_cpi();
-
- cpu_set(boot_cpu_id, cpu_online_map);
- cpu_set(boot_cpu_id, cpu_callout_map);
-
- /* loop over all the extended VIC CPUs and boot them. The
- * Quad CPUs must be bootstrapped by their extended VIC cpu */
- for(i = 0; i < NR_CPUS; i++) {
- if(i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map))
- continue;
- do_boot_cpu(i);
- /* This udelay seems to be needed for the Quad boots
- * don't remove unless you know what you're doing */
- udelay(1000);
- }
- /* we could compute the total bogomips here, but why bother?,
- * Code added from smpboot.c */
- {
- unsigned long bogosum = 0;
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_isset(i, cpu_online_map))
- bogosum += cpu_data[i].loops_per_jiffy;
- printk(KERN_INFO "Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
- cpucount+1,
- bogosum/(500000/HZ),
- (bogosum/(5000/HZ))%100);
- }
- voyager_extended_cpus = hweight32(voyager_extended_vic_processors);
- printk("VOYAGER: Extended (interrupt handling CPUs): %d, non-extended: %d\n", voyager_extended_cpus, num_booting_cpus() - voyager_extended_cpus);
- /* that's it, switch to symmetric mode */
- outb(0, VIC_PRIORITY_REGISTER);
- outb(0, VIC_CLAIM_REGISTER_0);
- outb(0, VIC_CLAIM_REGISTER_1);
-
- VDEBUG(("VOYAGER SMP: Booted with %d CPUs\n", num_booting_cpus()));
-}
-
-/* Reload the secondary CPUs task structure (this function does not
- * return ) */
-void __init
-initialize_secondary(void)
-{
-#if 0
- // AC kernels only
- set_current(hard_get_current());
-#endif
-
- /*
- * We don't actually need to load the full TSS,
- * basically just the stack pointer and the eip.
- */
-
- asm volatile(
- "movl %0,%%esp\n\t"
- "jmp *%1"
- :
- :"r" (current->thread.esp),"r" (current->thread.eip));
-}
-
-/* handle a Voyager SYS_INT -- If we don't, the base board will
- * panic the system.
- *
- * System interrupts occur because some problem was detected on the
- * various busses. To find out what you have to probe all the
- * hardware via the CAT bus. FIXME: At the moment we do nothing. */
-fastcall void
-smp_vic_sys_interrupt(struct pt_regs *regs)
-{
- ack_CPI(VIC_SYS_INT);
- printk("Voyager SYSTEM INTERRUPT\n");
-}
-
-/* Handle a voyager CMN_INT; These interrupts occur either because of
- * a system status change or because a single bit memory error
- * occurred. FIXME: At the moment, ignore all this. */
-fastcall void
-smp_vic_cmn_interrupt(struct pt_regs *regs)
-{
- static __u8 in_cmn_int = 0;
- static DEFINE_SPINLOCK(cmn_int_lock);
-
- /* common ints are broadcast, so make sure we only do this once */
- _raw_spin_lock(&cmn_int_lock);
- if(in_cmn_int)
- goto unlock_end;
-
- in_cmn_int++;
- _raw_spin_unlock(&cmn_int_lock);
-
- VDEBUG(("Voyager COMMON INTERRUPT\n"));
-
- if(voyager_level == 5)
- voyager_cat_do_common_interrupt();
-
- _raw_spin_lock(&cmn_int_lock);
- in_cmn_int = 0;
- unlock_end:
- _raw_spin_unlock(&cmn_int_lock);
- ack_CPI(VIC_CMN_INT);
-}
-
-/*
- * Reschedule call back. Nothing to do, all the work is done
- * automatically when we return from the interrupt. */
-static void
-smp_reschedule_interrupt(void)
-{
- /* do nothing */
-}
-
-static struct mm_struct * flush_mm;
-static unsigned long flush_va;
-static DEFINE_SPINLOCK(tlbstate_lock);
-#define FLUSH_ALL 0xffffffff
-
-/*
- * We cannot call mmdrop() because we are in interrupt context,
- * instead update mm->cpu_vm_mask.
- *
- * We need to reload %cr3 since the page tables may be going
- * away from under us..
- */
-static inline void
-leave_mm (unsigned long cpu)
-{
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
- BUG();
- cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
- load_cr3(swapper_pg_dir);
-}
-
-
-/*
- * Invalidate call-back
- */
-static void
-smp_invalidate_interrupt(void)
-{
- __u8 cpu = smp_processor_id();
-
- if (!test_bit(cpu, &smp_invalidate_needed))
- return;
- /* This will flood messages. Don't uncomment unless you see
- * Problems with cross cpu invalidation
- VDEBUG(("VOYAGER SMP: CPU%d received INVALIDATE_CPI\n",
- smp_processor_id()));
- */
-
- if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
- if (flush_va == FLUSH_ALL)
- local_flush_tlb();
- else
- __flush_tlb_one(flush_va);
- } else
- leave_mm(cpu);
- }
- smp_mb__before_clear_bit();
- clear_bit(cpu, &smp_invalidate_needed);
- smp_mb__after_clear_bit();
-}
-
-/* All the new flush operations for 2.4 */
-
-
-/* This routine is called with a physical cpu mask */
-static void
-voyager_flush_tlb_others (unsigned long cpumask, struct mm_struct *mm,
- unsigned long va)
-{
- int stuck = 50000;
-
- if (!cpumask)
- BUG();
- if ((cpumask & cpus_addr(cpu_online_map)[0]) != cpumask)
- BUG();
- if (cpumask & (1 << smp_processor_id()))
- BUG();
- if (!mm)
- BUG();
-
- spin_lock(&tlbstate_lock);
-
- flush_mm = mm;
- flush_va = va;
- atomic_set_mask(cpumask, &smp_invalidate_needed);
- /*
- * We have to send the CPI only to
- * CPUs affected.
- */
- send_CPI(cpumask, VIC_INVALIDATE_CPI);
-
- while (smp_invalidate_needed) {
- mb();
- if(--stuck == 0) {
- printk("***WARNING*** Stuck doing invalidate CPI (CPU%d)\n", smp_processor_id());
- break;
- }
- }
-
- /* Uncomment only to debug invalidation problems
- VDEBUG(("VOYAGER SMP: Completed invalidate CPI (CPU%d)\n", cpu));
- */
-
- flush_mm = NULL;
- flush_va = 0;
- spin_unlock(&tlbstate_lock);
-}
-
-void
-flush_tlb_current_task(void)
-{
- struct mm_struct *mm = current->mm;
- unsigned long cpu_mask;
-
- preempt_disable();
-
- cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
- local_flush_tlb();
- if (cpu_mask)
- voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
-
- preempt_enable();
-}
-
-
-void
-flush_tlb_mm (struct mm_struct * mm)
-{
- unsigned long cpu_mask;
-
- preempt_disable();
-
- cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
-
- if (current->active_mm == mm) {
- if (current->mm)
- local_flush_tlb();
- else
- leave_mm(smp_processor_id());
- }
- if (cpu_mask)
- voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
-
- preempt_enable();
-}
-
-void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long cpu_mask;
-
- preempt_disable();
-
- cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
- if (current->active_mm == mm) {
- if(current->mm)
- __flush_tlb_one(va);
- else
- leave_mm(smp_processor_id());
- }
-
- if (cpu_mask)
- voyager_flush_tlb_others(cpu_mask, mm, va);
-
- preempt_enable();
-}
-EXPORT_SYMBOL(flush_tlb_page);
-
-/* enable the requested IRQs */
-static void
-smp_enable_irq_interrupt(void)
-{
- __u8 irq;
- __u8 cpu = get_cpu();
-
- VDEBUG(("VOYAGER SMP: CPU%d enabling irq mask 0x%x\n", cpu,
- vic_irq_enable_mask[cpu]));
-
- spin_lock(&vic_irq_lock);
- for(irq = 0; irq < 16; irq++) {
- if(vic_irq_enable_mask[cpu] & (1<<irq))
- enable_local_vic_irq(irq);
- }
- vic_irq_enable_mask[cpu] = 0;
- spin_unlock(&vic_irq_lock);
-
- put_cpu_no_resched();
-}
-
-/*
- * CPU halt call-back
- */
-static void
-smp_stop_cpu_function(void *dummy)
-{
- VDEBUG(("VOYAGER SMP: CPU%d is STOPPING\n", smp_processor_id()));
- cpu_clear(smp_processor_id(), cpu_online_map);
- local_irq_disable();
- for(;;)
- halt();
-}
-
-static DEFINE_SPINLOCK(call_lock);
-
-struct call_data_struct {
- void (*func) (void *info);
- void *info;
- volatile unsigned long started;
- volatile unsigned long finished;
- int wait;
-};
-
-static struct call_data_struct * call_data;
-
-/* execute a thread on a new CPU. The function to be called must be
- * previously set up. This is used to schedule a function for
- * execution on all CPU's - set up the function then broadcast a
- * function_interrupt CPI to come here on each CPU */
-static void
-smp_call_function_interrupt(void)
-{
- void (*func) (void *info) = call_data->func;
- void *info = call_data->info;
- /* must take copy of wait because call_data may be replaced
- * unless the function is waiting for us to finish */
- int wait = call_data->wait;
- __u8 cpu = smp_processor_id();
-
- /*
- * Notify initiating CPU that I've grabbed the data and am
- * about to execute the function
- */
- mb();
- if(!test_and_clear_bit(cpu, &call_data->started)) {
- /* If the bit wasn't set, this could be a replay */
- printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion with no call pending\n", cpu);
- return;
- }
- /*
- * At this point the info structure may be out of scope unless wait==1
- */
- irq_enter();
- (*func)(info);
- irq_exit();
- if (wait) {
- mb();
- clear_bit(cpu, &call_data->finished);
- }
-}
-
-static int
-voyager_smp_call_function_mask (cpumask_t cpumask,
- void (*func) (void *info), void *info,
- int wait)
-{
- struct call_data_struct data;
- u32 mask = cpus_addr(cpumask)[0];
-
- mask &= ~(1<<smp_processor_id());
-
- if (!mask)
- return 0;
-
- /* Can deadlock when called with interrupts disabled */
- WARN_ON(irqs_disabled());
-
- data.func = func;
- data.info = info;
- data.started = mask;
- data.wait = wait;
- if (wait)
- data.finished = mask;
-
- spin_lock(&call_lock);
- call_data = &data;
- wmb();
- /* Send a message to all other CPUs and wait for them to respond */
- send_CPI(mask, VIC_CALL_FUNCTION_CPI);
-
- /* Wait for response */
- while (data.started)
- barrier();
-
- if (wait)
- while (data.finished)
- barrier();
-
- spin_unlock(&call_lock);
-
- return 0;
-}
-
-/* Sorry about the name. In an APIC based system, the APICs
- * themselves are programmed to send a timer interrupt. This is used
- * by linux to reschedule the processor. Voyager doesn't have this,
- * so we use the system clock to interrupt one processor, which in
- * turn, broadcasts a timer CPI to all the others --- we receive that
- * CPI here. We don't use this actually for counting so losing
- * ticks doesn't matter
- *
- * FIXME: For those CPU's which actually have a local APIC, we could
- * try to use it to trigger this interrupt instead of having to
- * broadcast the timer tick. Unfortunately, all my pentium DYADs have
- * no local APIC, so I can't do this
- *
- * This function is currently a placeholder and is unused in the code */
-fastcall void
-smp_apic_timer_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- wrapper_smp_local_timer_interrupt();
- set_irq_regs(old_regs);
-}
-
-/* All of the QUAD interrupt GATES */
-fastcall void
-smp_qic_timer_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- ack_QIC_CPI(QIC_TIMER_CPI);
- wrapper_smp_local_timer_interrupt();
- set_irq_regs(old_regs);
-}
-
-fastcall void
-smp_qic_invalidate_interrupt(struct pt_regs *regs)
-{
- ack_QIC_CPI(QIC_INVALIDATE_CPI);
- smp_invalidate_interrupt();
-}
-
-fastcall void
-smp_qic_reschedule_interrupt(struct pt_regs *regs)
-{
- ack_QIC_CPI(QIC_RESCHEDULE_CPI);
- smp_reschedule_interrupt();
-}
-
-fastcall void
-smp_qic_enable_irq_interrupt(struct pt_regs *regs)
-{
- ack_QIC_CPI(QIC_ENABLE_IRQ_CPI);
- smp_enable_irq_interrupt();
-}
-
-fastcall void
-smp_qic_call_function_interrupt(struct pt_regs *regs)
-{
- ack_QIC_CPI(QIC_CALL_FUNCTION_CPI);
- smp_call_function_interrupt();
-}
-
-fastcall void
-smp_vic_cpi_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- __u8 cpu = smp_processor_id();
-
- if(is_cpu_quad())
- ack_QIC_CPI(VIC_CPI_LEVEL0);
- else
- ack_VIC_CPI(VIC_CPI_LEVEL0);
-
- if(test_and_clear_bit(VIC_TIMER_CPI, &vic_cpi_mailbox[cpu]))
- wrapper_smp_local_timer_interrupt();
- if(test_and_clear_bit(VIC_INVALIDATE_CPI, &vic_cpi_mailbox[cpu]))
- smp_invalidate_interrupt();
- if(test_and_clear_bit(VIC_RESCHEDULE_CPI, &vic_cpi_mailbox[cpu]))
- smp_reschedule_interrupt();
- if(test_and_clear_bit(VIC_ENABLE_IRQ_CPI, &vic_cpi_mailbox[cpu]))
- smp_enable_irq_interrupt();
- if(test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu]))
- smp_call_function_interrupt();
- set_irq_regs(old_regs);
-}
-
-static void
-do_flush_tlb_all(void* info)
-{
- unsigned long cpu = smp_processor_id();
-
- __flush_tlb_all();
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY)
- leave_mm(cpu);
-}
-
-
-/* flush the TLB of every active CPU in the system */
-void
-flush_tlb_all(void)
-{
- on_each_cpu(do_flush_tlb_all, 0, 1, 1);
-}
-
-/* used to set up the trampoline for other CPUs when the memory manager
- * is sorted out */
-void __init
-smp_alloc_memory(void)
-{
- trampoline_base = (__u32)alloc_bootmem_low_pages(PAGE_SIZE);
- if(__pa(trampoline_base) >= 0x93000)
- BUG();
-}
-
-/* send a reschedule CPI to one CPU by physical CPU number*/
-static void
-voyager_smp_send_reschedule(int cpu)
-{
- send_one_CPI(cpu, VIC_RESCHEDULE_CPI);
-}
-
-
-int
-hard_smp_processor_id(void)
-{
- __u8 i;
- __u8 cpumask = inb(VIC_PROC_WHO_AM_I);
- if((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER)
- return cpumask & 0x1F;
-
- for(i = 0; i < 8; i++) {
- if(cpumask & (1<<i))
- return i;
- }
- printk("** WARNING ** Illegal cpuid returned by VIC: %d", cpumask);
- return 0;
-}
-
-int
-safe_smp_processor_id(void)
-{
- return hard_smp_processor_id();
-}
-
-/* broadcast a halt to all other CPUs */
-static void
-voyager_smp_send_stop(void)
-{
- smp_call_function(smp_stop_cpu_function, NULL, 1, 1);
-}
-
-/* this function is triggered in time.c when a clock tick fires
- * we need to re-broadcast the tick to all CPUs */
-void
-smp_vic_timer_interrupt(void)
-{
- send_CPI_allbutself(VIC_TIMER_CPI);
- smp_local_timer_interrupt();
-}
-
-/* local (per CPU) timer interrupt. It does both profiling and
- * process statistics/rescheduling.
- *
- * We do profiling in every local tick, statistics/rescheduling
- * happen only every 'profiling multiplier' ticks. The default
- * multiplier is 1 and it can be changed by writing the new multiplier
- * value into /proc/profile.
- */
-void
-smp_local_timer_interrupt(void)
-{
- int cpu = smp_processor_id();
- long weight;
-
- profile_tick(CPU_PROFILING);
- if (--per_cpu(prof_counter, cpu) <= 0) {
- /*
- * The multiplier may have changed since the last time we got
- * to this point as a result of the user writing to
- * /proc/profile. In this case we need to adjust the APIC
- * timer accordingly.
- *
- * Interrupts are already masked off at this point.
- */
- per_cpu(prof_counter,cpu) = per_cpu(prof_multiplier, cpu);
- if (per_cpu(prof_counter, cpu) !=
- per_cpu(prof_old_multiplier, cpu)) {
- /* FIXME: need to update the vic timer tick here */
- per_cpu(prof_old_multiplier, cpu) =
- per_cpu(prof_counter, cpu);
- }
-
- update_process_times(user_mode_vm(get_irq_regs()));
- }
-
- if( ((1<<cpu) & voyager_extended_vic_processors) == 0)
- /* only extended VIC processors participate in
- * interrupt distribution */
- return;
-
- /*
- * We take the 'long' return path, and there every subsystem
- * grabs the apropriate locks (kernel lock/ irq lock).
- *
- * we might want to decouple profiling from the 'long path',
- * and do the profiling totally in assembly.
- *
- * Currently this isn't too much of an issue (performance wise),
- * we can take more than 100K local irqs per second on a 100 MHz P5.
- */
-
- if((++vic_tick[cpu] & 0x7) != 0)
- return;
- /* get here every 16 ticks (about every 1/6 of a second) */
-
- /* Change our priority to give someone else a chance at getting
- * the IRQ. The algorithm goes like this:
- *
- * In the VIC, the dynamically routed interrupt is always
- * handled by the lowest priority eligible (i.e. receiving
- * interrupts) CPU. If >1 eligible CPUs are equal lowest, the
- * lowest processor number gets it.
- *
- * The priority of a CPU is controlled by a special per-CPU
- * VIC priority register which is 3 bits wide 0 being lowest
- * and 7 highest priority..
- *
- * Therefore we subtract the average number of interrupts from
- * the number we've fielded. If this number is negative, we
- * lower the activity count and if it is positive, we raise
- * it.
- *
- * I'm afraid this still leads to odd looking interrupt counts:
- * the totals are all roughly equal, but the individual ones
- * look rather skewed.
- *
- * FIXME: This algorithm is total crap when mixed with SMP
- * affinity code since we now try to even up the interrupt
- * counts when an affinity binding is keeping them on a
- * particular CPU*/
- weight = (vic_intr_count[cpu]*voyager_extended_cpus
- - vic_intr_total) >> 4;
- weight += 4;
- if(weight > 7)
- weight = 7;
- if(weight < 0)
- weight = 0;
-
- outb((__u8)weight, VIC_PRIORITY_REGISTER);
-
-#ifdef VOYAGER_DEBUG
- if((vic_tick[cpu] & 0xFFF) == 0) {
- /* print this message roughly every 25 secs */
- printk("VOYAGER SMP: vic_tick[%d] = %lu, weight = %ld\n",
- cpu, vic_tick[cpu], weight);
- }
-#endif
-}
-
-/* setup the profiling timer */
-int
-setup_profiling_timer(unsigned int multiplier)
-{
- int i;
-
- if ( (!multiplier))
- return -EINVAL;
-
- /*
- * Set the new multiplier for each CPU. CPUs don't start using the
- * new values until the next timer interrupt in which they do process
- * accounting.
- */
- for (i = 0; i < NR_CPUS; ++i)
- per_cpu(prof_multiplier, i) = multiplier;
-
- return 0;
-}
-
-/* This is a bit of a mess, but forced on us by the genirq changes
- * there's no genirq handler that really does what voyager wants
- * so hack it up with the simple IRQ handler */
-static void fastcall
-handle_vic_irq(unsigned int irq, struct irq_desc *desc)
-{
- before_handle_vic_irq(irq);
- handle_simple_irq(irq, desc);
- after_handle_vic_irq(irq);
-}
-
-
-/* The CPIs are handled in the per cpu 8259s, so they must be
- * enabled to be received: FIX: enabling the CPIs in the early
- * boot sequence interferes with bug checking; enable them later
- * on in smp_init */
-#define VIC_SET_GATE(cpi, vector) \
- set_intr_gate((cpi) + VIC_DEFAULT_CPI_BASE, (vector))
-#define QIC_SET_GATE(cpi, vector) \
- set_intr_gate((cpi) + QIC_DEFAULT_CPI_BASE, (vector))
-
-void __init
-smp_intr_init(void)
-{
- int i;
-
- /* initialize the per cpu irq mask to all disabled */
- for(i = 0; i < NR_CPUS; i++)
- vic_irq_mask[i] = 0xFFFF;
-
- VIC_SET_GATE(VIC_CPI_LEVEL0, vic_cpi_interrupt);
-
- VIC_SET_GATE(VIC_SYS_INT, vic_sys_interrupt);
- VIC_SET_GATE(VIC_CMN_INT, vic_cmn_interrupt);
-
- QIC_SET_GATE(QIC_TIMER_CPI, qic_timer_interrupt);
- QIC_SET_GATE(QIC_INVALIDATE_CPI, qic_invalidate_interrupt);
- QIC_SET_GATE(QIC_RESCHEDULE_CPI, qic_reschedule_interrupt);
- QIC_SET_GATE(QIC_ENABLE_IRQ_CPI, qic_enable_irq_interrupt);
- QIC_SET_GATE(QIC_CALL_FUNCTION_CPI, qic_call_function_interrupt);
-
-
- /* now put the VIC descriptor into the first 48 IRQs
- *
- * This is for later: first 16 correspond to PC IRQs; next 16
- * are Primary MC IRQs and final 16 are Secondary MC IRQs */
- for(i = 0; i < 48; i++)
- set_irq_chip_and_handler(i, &vic_chip, handle_vic_irq);
-}
-
-/* send a CPI at level cpi to a set of cpus in cpuset (set 1 bit per
- * processor to receive CPI */
-static void
-send_CPI(__u32 cpuset, __u8 cpi)
-{
- int cpu;
- __u32 quad_cpuset = (cpuset & voyager_quad_processors);
-
- if(cpi < VIC_START_FAKE_CPI) {
- /* fake CPI are only used for booting, so send to the
- * extended quads as well---Quads must be VIC booted */
- outb((__u8)(cpuset), VIC_CPI_Registers[cpi]);
- return;
- }
- if(quad_cpuset)
- send_QIC_CPI(quad_cpuset, cpi);
- cpuset &= ~quad_cpuset;
- cpuset &= 0xff; /* only first 8 CPUs vaild for VIC CPI */
- if(cpuset == 0)
- return;
- for_each_online_cpu(cpu) {
- if(cpuset & (1<<cpu))
- set_bit(cpi, &vic_cpi_mailbox[cpu]);
- }
- if(cpuset)
- outb((__u8)cpuset, VIC_CPI_Registers[VIC_CPI_LEVEL0]);
-}
-
-/* Acknowledge receipt of CPI in the QIC, clear in QIC hardware and
- * set the cache line to shared by reading it.
- *
- * DON'T make this inline otherwise the cache line read will be
- * optimised away
- * */
-static int
-ack_QIC_CPI(__u8 cpi) {
- __u8 cpu = hard_smp_processor_id();
-
- cpi &= 7;
-
- outb(1<<cpi, QIC_INTERRUPT_CLEAR1);
- return voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi;
-}
-
-static void
-ack_special_QIC_CPI(__u8 cpi)
-{
- switch(cpi) {
- case VIC_CMN_INT:
- outb(QIC_CMN_INT, QIC_INTERRUPT_CLEAR0);
- break;
- case VIC_SYS_INT:
- outb(QIC_SYS_INT, QIC_INTERRUPT_CLEAR0);
- break;
- }
- /* also clear at the VIC, just in case (nop for non-extended proc) */
- ack_VIC_CPI(cpi);
-}
-
-/* Acknowledge receipt of CPI in the VIC (essentially an EOI) */
-static void
-ack_VIC_CPI(__u8 cpi)
-{
-#ifdef VOYAGER_DEBUG
- unsigned long flags;
- __u16 isr;
- __u8 cpu = smp_processor_id();
-
- local_irq_save(flags);
- isr = vic_read_isr();
- if((isr & (1<<(cpi &7))) == 0) {
- printk("VOYAGER SMP: CPU%d lost CPI%d\n", cpu, cpi);
- }
-#endif
- /* send specific EOI; the two system interrupts have
- * bit 4 set for a separate vector but behave as the
- * corresponding 3 bit intr */
- outb_p(0x60|(cpi & 7),0x20);
-
-#ifdef VOYAGER_DEBUG
- if((vic_read_isr() & (1<<(cpi &7))) != 0) {
- printk("VOYAGER SMP: CPU%d still asserting CPI%d\n", cpu, cpi);
- }
- local_irq_restore(flags);
-#endif
-}
-
-/* cribbed with thanks from irq.c */
-#define __byte(x,y) (((unsigned char *)&(y))[x])
-#define cached_21(cpu) (__byte(0,vic_irq_mask[cpu]))
-#define cached_A1(cpu) (__byte(1,vic_irq_mask[cpu]))
-
-static unsigned int
-startup_vic_irq(unsigned int irq)
-{
- unmask_vic_irq(irq);
-
- return 0;
-}
-
-/* The enable and disable routines. This is where we run into
- * conflicting architectural philosophy. Fundamentally, the voyager
- * architecture does not expect to have to disable interrupts globally
- * (the IRQ controllers belong to each CPU). The processor masquerade
- * which is used to start the system shouldn't be used in a running OS
- * since it will cause great confusion if two separate CPUs drive to
- * the same IRQ controller (I know, I've tried it).
- *
- * The solution is a variant on the NCR lazy SPL design:
- *
- * 1) To disable an interrupt, do nothing (other than set the
- * IRQ_DISABLED flag). This dares the interrupt actually to arrive.
- *
- * 2) If the interrupt dares to come in, raise the local mask against
- * it (this will result in all the CPU masks being raised
- * eventually).
- *
- * 3) To enable the interrupt, lower the mask on the local CPU and
- * broadcast an Interrupt enable CPI which causes all other CPUs to
- * adjust their masks accordingly. */
-
-static void
-unmask_vic_irq(unsigned int irq)
-{
- /* linux doesn't to processor-irq affinity, so enable on
- * all CPUs we know about */
- int cpu = smp_processor_id(), real_cpu;
- __u16 mask = (1<<irq);
- __u32 processorList = 0;
- unsigned long flags;
-
- VDEBUG(("VOYAGER: unmask_vic_irq(%d) CPU%d affinity 0x%lx\n",
- irq, cpu, cpu_irq_affinity[cpu]));
- spin_lock_irqsave(&vic_irq_lock, flags);
- for_each_online_cpu(real_cpu) {
- if(!(voyager_extended_vic_processors & (1<<real_cpu)))
- continue;
- if(!(cpu_irq_affinity[real_cpu] & mask)) {
- /* irq has no affinity for this CPU, ignore */
- continue;
- }
- if(real_cpu == cpu) {
- enable_local_vic_irq(irq);
- }
- else if(vic_irq_mask[real_cpu] & mask) {
- vic_irq_enable_mask[real_cpu] |= mask;
- processorList |= (1<<real_cpu);
- }
- }
- spin_unlock_irqrestore(&vic_irq_lock, flags);
- if(processorList)
- send_CPI(processorList, VIC_ENABLE_IRQ_CPI);
-}
-
-static void
-mask_vic_irq(unsigned int irq)
-{
- /* lazy disable, do nothing */
-}
-
-static void
-enable_local_vic_irq(unsigned int irq)
-{
- __u8 cpu = smp_processor_id();
- __u16 mask = ~(1 << irq);
- __u16 old_mask = vic_irq_mask[cpu];
-
- vic_irq_mask[cpu] &= mask;
- if(vic_irq_mask[cpu] == old_mask)
- return;
-
- VDEBUG(("VOYAGER DEBUG: Enabling irq %d in hardware on CPU %d\n",
- irq, cpu));
-
- if (irq & 8) {
- outb_p(cached_A1(cpu),0xA1);
- (void)inb_p(0xA1);
- }
- else {
- outb_p(cached_21(cpu),0x21);
- (void)inb_p(0x21);
- }
-}
-
-static void
-disable_local_vic_irq(unsigned int irq)
-{
- __u8 cpu = smp_processor_id();
- __u16 mask = (1 << irq);
- __u16 old_mask = vic_irq_mask[cpu];
-
- if(irq == 7)
- return;
-
- vic_irq_mask[cpu] |= mask;
- if(old_mask == vic_irq_mask[cpu])
- return;
-
- VDEBUG(("VOYAGER DEBUG: Disabling irq %d in hardware on CPU %d\n",
- irq, cpu));
-
- if (irq & 8) {
- outb_p(cached_A1(cpu),0xA1);
- (void)inb_p(0xA1);
- }
- else {
- outb_p(cached_21(cpu),0x21);
- (void)inb_p(0x21);
- }
-}
-
-/* The VIC is level triggered, so the ack can only be issued after the
- * interrupt completes. However, we do Voyager lazy interrupt
- * handling here: It is an extremely expensive operation to mask an
- * interrupt in the vic, so we merely set a flag (IRQ_DISABLED). If
- * this interrupt actually comes in, then we mask and ack here to push
- * the interrupt off to another CPU */
-static void
-before_handle_vic_irq(unsigned int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
- __u8 cpu = smp_processor_id();
-
- _raw_spin_lock(&vic_irq_lock);
- vic_intr_total++;
- vic_intr_count[cpu]++;
-
- if(!(cpu_irq_affinity[cpu] & (1<<irq))) {
- /* The irq is not in our affinity mask, push it off
- * onto another CPU */
- VDEBUG(("VOYAGER DEBUG: affinity triggered disable of irq %d on cpu %d\n",
- irq, cpu));
- disable_local_vic_irq(irq);
- /* set IRQ_INPROGRESS to prevent the handler in irq.c from
- * actually calling the interrupt routine */
- desc->status |= IRQ_REPLAY | IRQ_INPROGRESS;
- } else if(desc->status & IRQ_DISABLED) {
- /* Damn, the interrupt actually arrived, do the lazy
- * disable thing. The interrupt routine in irq.c will
- * not handle a IRQ_DISABLED interrupt, so nothing more
- * need be done here */
- VDEBUG(("VOYAGER DEBUG: lazy disable of irq %d on CPU %d\n",
- irq, cpu));
- disable_local_vic_irq(irq);
- desc->status |= IRQ_REPLAY;
- } else {
- desc->status &= ~IRQ_REPLAY;
- }
-
- _raw_spin_unlock(&vic_irq_lock);
-}
-
-/* Finish the VIC interrupt: basically mask */
-static void
-after_handle_vic_irq(unsigned int irq)
-{
- irq_desc_t *desc = irq_desc + irq;
-
- _raw_spin_lock(&vic_irq_lock);
- {
- unsigned int status = desc->status & ~IRQ_INPROGRESS;
-#ifdef VOYAGER_DEBUG
- __u16 isr;
-#endif
-
- desc->status = status;
- if ((status & IRQ_DISABLED))
- disable_local_vic_irq(irq);
-#ifdef VOYAGER_DEBUG
- /* DEBUG: before we ack, check what's in progress */
- isr = vic_read_isr();
- if((isr & (1<<irq) && !(status & IRQ_REPLAY)) == 0) {
- int i;
- __u8 cpu = smp_processor_id();
- __u8 real_cpu;
- int mask; /* Um... initialize me??? --RR */
-
- printk("VOYAGER SMP: CPU%d lost interrupt %d\n",
- cpu, irq);
- for_each_possible_cpu(real_cpu, mask) {
-
- outb(VIC_CPU_MASQUERADE_ENABLE | real_cpu,
- VIC_PROCESSOR_ID);
- isr = vic_read_isr();
- if(isr & (1<<irq)) {
- printk("VOYAGER SMP: CPU%d ack irq %d\n",
- real_cpu, irq);
- ack_vic_irq(irq);
- }
- outb(cpu, VIC_PROCESSOR_ID);
- }
- }
-#endif /* VOYAGER_DEBUG */
- /* as soon as we ack, the interrupt is eligible for
- * receipt by another CPU so everything must be in
- * order here */
- ack_vic_irq(irq);
- if(status & IRQ_REPLAY) {
- /* replay is set if we disable the interrupt
- * in the before_handle_vic_irq() routine, so
- * clear the in progress bit here to allow the
- * next CPU to handle this correctly */
- desc->status &= ~(IRQ_REPLAY | IRQ_INPROGRESS);
- }
-#ifdef VOYAGER_DEBUG
- isr = vic_read_isr();
- if((isr & (1<<irq)) != 0)
- printk("VOYAGER SMP: after_handle_vic_irq() after ack irq=%d, isr=0x%x\n",
- irq, isr);
-#endif /* VOYAGER_DEBUG */
- }
- _raw_spin_unlock(&vic_irq_lock);
-
- /* All code after this point is out of the main path - the IRQ
- * may be intercepted by another CPU if reasserted */
-}
-
-
-/* Linux processor - interrupt affinity manipulations.
- *
- * For each processor, we maintain a 32 bit irq affinity mask.
- * Initially it is set to all 1's so every processor accepts every
- * interrupt. In this call, we change the processor's affinity mask:
- *
- * Change from enable to disable:
- *
- * If the interrupt ever comes in to the processor, we will disable it
- * and ack it to push it off to another CPU, so just accept the mask here.
- *
- * Change from disable to enable:
- *
- * change the mask and then do an interrupt enable CPI to re-enable on
- * the selected processors */
-
-void
-set_vic_irq_affinity(unsigned int irq, cpumask_t mask)
-{
- /* Only extended processors handle interrupts */
- unsigned long real_mask;
- unsigned long irq_mask = 1 << irq;
- int cpu;
-
- real_mask = cpus_addr(mask)[0] & voyager_extended_vic_processors;
-
- if(cpus_addr(mask)[0] == 0)
- /* can't have no cpu's to accept the interrupt -- extremely
- * bad things will happen */
- return;
-
- if(irq == 0)
- /* can't change the affinity of the timer IRQ. This
- * is due to the constraint in the voyager
- * architecture that the CPI also comes in on and IRQ
- * line and we have chosen IRQ0 for this. If you
- * raise the mask on this interrupt, the processor
- * will no-longer be able to accept VIC CPIs */
- return;
-
- if(irq >= 32)
- /* You can only have 32 interrupts in a voyager system
- * (and 32 only if you have a secondary microchannel
- * bus) */
- return;
-
- for_each_online_cpu(cpu) {
- unsigned long cpu_mask = 1 << cpu;
-
- if(cpu_mask & real_mask) {
- /* enable the interrupt for this cpu */
- cpu_irq_affinity[cpu] |= irq_mask;
- } else {
- /* disable the interrupt for this cpu */
- cpu_irq_affinity[cpu] &= ~irq_mask;
- }
- }
- /* this is magic, we now have the correct affinity maps, so
- * enable the interrupt. This will send an enable CPI to
- * those cpu's who need to enable it in their local masks,
- * causing them to correct for the new affinity . If the
- * interrupt is currently globally disabled, it will simply be
- * disabled again as it comes in (voyager lazy disable). If
- * the affinity map is tightened to disable the interrupt on a
- * cpu, it will be pushed off when it comes in */
- unmask_vic_irq(irq);
-}
-
-static void
-ack_vic_irq(unsigned int irq)
-{
- if (irq & 8) {
- outb(0x62,0x20); /* Specific EOI to cascade */
- outb(0x60|(irq & 7),0xA0);
- } else {
- outb(0x60 | (irq & 7),0x20);
- }
-}
-
-/* enable the CPIs. In the VIC, the CPIs are delivered by the 8259
- * but are not vectored by it. This means that the 8259 mask must be
- * lowered to receive them */
-static __init void
-vic_enable_cpi(void)
-{
- __u8 cpu = smp_processor_id();
-
- /* just take a copy of the current mask (nop for boot cpu) */
- vic_irq_mask[cpu] = vic_irq_mask[boot_cpu_id];
-
- enable_local_vic_irq(VIC_CPI_LEVEL0);
- enable_local_vic_irq(VIC_CPI_LEVEL1);
- /* for sys int and cmn int */
- enable_local_vic_irq(7);
-
- if(is_cpu_quad()) {
- outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0);
- outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1);
- VDEBUG(("VOYAGER SMP: QIC ENABLE CPI: CPU%d: MASK 0x%x\n",
- cpu, QIC_CPI_ENABLE));
- }
-
- VDEBUG(("VOYAGER SMP: ENABLE CPI: CPU%d: MASK 0x%x\n",
- cpu, vic_irq_mask[cpu]));
-}
-
-void
-voyager_smp_dump()
-{
- int old_cpu = smp_processor_id(), cpu;
-
- /* dump the interrupt masks of each processor */
- for_each_online_cpu(cpu) {
- __u16 imr, isr, irr;
- unsigned long flags;
-
- local_irq_save(flags);
- outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID);
- imr = (inb(0xa1) << 8) | inb(0x21);
- outb(0x0a, 0xa0);
- irr = inb(0xa0) << 8;
- outb(0x0a, 0x20);
- irr |= inb(0x20);
- outb(0x0b, 0xa0);
- isr = inb(0xa0) << 8;
- outb(0x0b, 0x20);
- isr |= inb(0x20);
- outb(old_cpu, VIC_PROCESSOR_ID);
- local_irq_restore(flags);
- printk("\tCPU%d: mask=0x%x, IMR=0x%x, IRR=0x%x, ISR=0x%x\n",
- cpu, vic_irq_mask[cpu], imr, irr, isr);
-#if 0
- /* These lines are put in to try to unstick an un ack'd irq */
- if(isr != 0) {
- int irq;
- for(irq=0; irq<16; irq++) {
- if(isr & (1<<irq)) {
- printk("\tCPU%d: ack irq %d\n",
- cpu, irq);
- local_irq_save(flags);
- outb(VIC_CPU_MASQUERADE_ENABLE | cpu,
- VIC_PROCESSOR_ID);
- ack_vic_irq(irq);
- outb(old_cpu, VIC_PROCESSOR_ID);
- local_irq_restore(flags);
- }
- }
- }
-#endif
- }
-}
-
-void
-smp_voyager_power_off(void *dummy)
-{
- if(smp_processor_id() == boot_cpu_id)
- voyager_power_off();
- else
- smp_stop_cpu_function(NULL);
-}
-
-static void __init
-voyager_smp_prepare_cpus(unsigned int max_cpus)
-{
- /* FIXME: ignore max_cpus for now */
- smp_boot_cpus();
-}
-
-static void __devinit voyager_smp_prepare_boot_cpu(void)
-{
- init_gdt(smp_processor_id());
- switch_to_new_gdt();
-
- cpu_set(smp_processor_id(), cpu_online_map);
- cpu_set(smp_processor_id(), cpu_callout_map);
- cpu_set(smp_processor_id(), cpu_possible_map);
- cpu_set(smp_processor_id(), cpu_present_map);
-}
-
-static int __devinit
-voyager_cpu_up(unsigned int cpu)
-{
- /* This only works at boot for x86. See "rewrite" above. */
- if (cpu_isset(cpu, smp_commenced_mask))
- return -ENOSYS;
-
- /* In case one didn't come up */
- if (!cpu_isset(cpu, cpu_callin_map))
- return -EIO;
- /* Unleash the CPU! */
- cpu_set(cpu, smp_commenced_mask);
- while (!cpu_isset(cpu, cpu_online_map))
- mb();
- return 0;
-}
-
-static void __init
-voyager_smp_cpus_done(unsigned int max_cpus)
-{
- zap_low_mappings();
-}
-
-void __init
-smp_setup_processor_id(void)
-{
- current_thread_info()->cpu = hard_smp_processor_id();
- x86_write_percpu(cpu_number, hard_smp_processor_id());
-}
-
-struct smp_ops smp_ops = {
- .smp_prepare_boot_cpu = voyager_smp_prepare_boot_cpu,
- .smp_prepare_cpus = voyager_smp_prepare_cpus,
- .cpu_up = voyager_cpu_up,
- .smp_cpus_done = voyager_smp_cpus_done,
-
- .smp_send_stop = voyager_smp_send_stop,
- .smp_send_reschedule = voyager_smp_send_reschedule,
- .smp_call_function_mask = voyager_smp_call_function_mask,
-};
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* Copyright (C) 2001
- *
- * Author: J.E.J.Bottomley@HansenPartnership.com
- *
- * linux/arch/i386/kernel/voyager_thread.c
- *
- * This module provides the machine status monitor thread for the
- * voyager architecture. This allows us to monitor the machine
- * environment (temp, voltage, fan function) and the front panel and
- * internal UPS. If a fault is detected, this thread takes corrective
- * action (usually just informing init)
- * */
-
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/kernel_stat.h>
-#include <linux/delay.h>
-#include <linux/mc146818rtc.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/kmod.h>
-#include <linux/completion.h>
-#include <linux/sched.h>
-#include <linux/kthread.h>
-#include <asm/desc.h>
-#include <asm/voyager.h>
-#include <asm/vic.h>
-#include <asm/mtrr.h>
-#include <asm/msr.h>
-
-
-struct task_struct *voyager_thread;
-static __u8 set_timeout;
-
-static int
-execute(const char *string)
-{
- int ret;
-
- char *envp[] = {
- "HOME=/",
- "TERM=linux",
- "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
- NULL,
- };
- char *argv[] = {
- "/bin/bash",
- "-c",
- (char *)string,
- NULL,
- };
-
- if ((ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC)) != 0) {
- printk(KERN_ERR "Voyager failed to run \"%s\": %i\n",
- string, ret);
- }
- return ret;
-}
-
-static void
-check_from_kernel(void)
-{
- if(voyager_status.switch_off) {
-
- /* FIXME: This should be configureable via proc */
- execute("umask 600; echo 0 > /etc/initrunlvl; kill -HUP 1");
- } else if(voyager_status.power_fail) {
- VDEBUG(("Voyager daemon detected AC power failure\n"));
-
- /* FIXME: This should be configureable via proc */
- execute("umask 600; echo F > /etc/powerstatus; kill -PWR 1");
- set_timeout = 1;
- }
-}
-
-static void
-check_continuing_condition(void)
-{
- if(voyager_status.power_fail) {
- __u8 data;
- voyager_cat_psi(VOYAGER_PSI_SUBREAD,
- VOYAGER_PSI_AC_FAIL_REG, &data);
- if((data & 0x1f) == 0) {
- /* all power restored */
- printk(KERN_NOTICE "VOYAGER AC power restored, cancelling shutdown\n");
- /* FIXME: should be user configureable */
- execute("umask 600; echo O > /etc/powerstatus; kill -PWR 1");
- set_timeout = 0;
- }
- }
-}
-
-static int
-thread(void *unused)
-{
- printk(KERN_NOTICE "Voyager starting monitor thread\n");
-
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(set_timeout ? HZ : MAX_SCHEDULE_TIMEOUT);
-
- VDEBUG(("Voyager Daemon awoken\n"));
- if(voyager_status.request_from_kernel == 0) {
- /* probably awoken from timeout */
- check_continuing_condition();
- } else {
- check_from_kernel();
- voyager_status.request_from_kernel = 0;
- }
- }
-}
-
-static int __init
-voyager_thread_start(void)
-{
- voyager_thread = kthread_run(thread, NULL, "kvoyagerd");
- if (IS_ERR(voyager_thread)) {
- printk(KERN_ERR "Voyager: Failed to create system monitor thread.\n");
- return PTR_ERR(voyager_thread);
- }
- return 0;
-}
-
-
-static void __exit
-voyager_thread_stop(void)
-{
- kthread_stop(voyager_thread);
-}
-
-module_init(voyager_thread_start);
-module_exit(voyager_thread_stop);
--- /dev/null
+#
+# Makefile for the linux kernel.
+#
+
+EXTRA_CFLAGS := -Iarch/i386/kernel
+obj-y := setup.o voyager_basic.o voyager_thread.o
+
+obj-$(CONFIG_SMP) += voyager_smp.o voyager_cat.o
--- /dev/null
+/*
+ * Machine specific setup for generic
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/arch_hooks.h>
+#include <asm/voyager.h>
+#include <asm/e820.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+
+void __init pre_intr_init_hook(void)
+{
+ init_ISA_irqs();
+}
+
+/*
+ * IRQ2 is cascade interrupt to second interrupt controller
+ */
+static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
+
+void __init intr_init_hook(void)
+{
+#ifdef CONFIG_SMP
+ smp_intr_init();
+#endif
+
+ setup_irq(2, &irq2);
+}
+
+void __init pre_setup_arch_hook(void)
+{
+ /* Voyagers run their CPUs from independent clocks, so disable
+ * the TSC code because we can't sync them */
+ tsc_disable = 1;
+}
+
+void __init trap_init_hook(void)
+{
+}
+
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
+ .mask = CPU_MASK_NONE,
+ .name = "timer"
+};
+
+void __init time_init_hook(void)
+{
+ irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
+ setup_irq(0, &irq0);
+}
+
+/* Hook for machine specific memory setup. */
+
+char * __init machine_specific_memory_setup(void)
+{
+ char *who;
+
+ who = "NOT VOYAGER";
+
+ if(voyager_level == 5) {
+ __u32 addr, length;
+ int i;
+
+ who = "Voyager-SUS";
+
+ e820.nr_map = 0;
+ for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
+ add_memory_region(addr, length, E820_RAM);
+ }
+ return who;
+ } else if(voyager_level == 4) {
+ __u32 tom;
+ __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
+ /* select the DINO config space */
+ outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
+ /* Read DINO top of memory register */
+ tom = ((inb(catbase + 0x4) & 0xf0) << 16)
+ + ((inb(catbase + 0x5) & 0x7f) << 24);
+
+ if(inb(catbase) != VOYAGER_DINO) {
+ printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
+ tom = (EXT_MEM_K)<<10;
+ }
+ who = "Voyager-TOM";
+ add_memory_region(0, 0x9f000, E820_RAM);
+ /* map from 1M to top of memory */
+ add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
+ /* FIXME: Should check the ASICs to see if I need to
+ * take out the 8M window. Just do it at the moment
+ * */
+ add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
+ return who;
+ }
+
+ who = "BIOS-e820";
+
+ /*
+ * Try to copy the BIOS-supplied E820-map.
+ *
+ * Otherwise fake a memory map; one section from 0k->640k,
+ * the next section from 1mb->appropriate_mem_k
+ */
+ sanitize_e820_map(E820_MAP, &E820_MAP_NR);
+ if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+ unsigned long mem_size;
+
+ /* compare results from other methods and take the greater */
+ if (ALT_MEM_K < EXT_MEM_K) {
+ mem_size = EXT_MEM_K;
+ who = "BIOS-88";
+ } else {
+ mem_size = ALT_MEM_K;
+ who = "BIOS-e801";
+ }
+
+ e820.nr_map = 0;
+ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+ add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+ }
+ return who;
+}
--- /dev/null
+/* Copyright (C) 1999,2001
+ *
+ * Author: J.E.J.Bottomley@HansenPartnership.com
+ *
+ * linux/arch/i386/kernel/voyager.c
+ *
+ * This file contains all the voyager specific routines for getting
+ * initialisation of the architecture to function. For additional
+ * features see:
+ *
+ * voyager_cat.c - Voyager CAT bus interface
+ * voyager_smp.c - Voyager SMP hal (emulates linux smp.c)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/sysrq.h>
+#include <linux/smp.h>
+#include <linux/nodemask.h>
+#include <asm/io.h>
+#include <asm/voyager.h>
+#include <asm/vic.h>
+#include <linux/pm.h>
+#include <asm/tlbflush.h>
+#include <asm/arch_hooks.h>
+#include <asm/i8253.h>
+
+/*
+ * Power off function, if any
+ */
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+int voyager_level = 0;
+
+struct voyager_SUS *voyager_SUS = NULL;
+
+#ifdef CONFIG_SMP
+static void
+voyager_dump(int dummy1, struct tty_struct *dummy3)
+{
+ /* get here via a sysrq */
+ voyager_smp_dump();
+}
+
+static struct sysrq_key_op sysrq_voyager_dump_op = {
+ .handler = voyager_dump,
+ .help_msg = "Voyager",
+ .action_msg = "Dump Voyager Status",
+};
+#endif
+
+void
+voyager_detect(struct voyager_bios_info *bios)
+{
+ if(bios->len != 0xff) {
+ int class = (bios->class_1 << 8)
+ | (bios->class_2 & 0xff);
+
+ printk("Voyager System detected.\n"
+ " Class %x, Revision %d.%d\n",
+ class, bios->major, bios->minor);
+ if(class == VOYAGER_LEVEL4)
+ voyager_level = 4;
+ else if(class < VOYAGER_LEVEL5_AND_ABOVE)
+ voyager_level = 3;
+ else
+ voyager_level = 5;
+ printk(" Architecture Level %d\n", voyager_level);
+ if(voyager_level < 4)
+ printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
+ /* install the power off handler */
+ pm_power_off = voyager_power_off;
+#ifdef CONFIG_SMP
+ register_sysrq_key('v', &sysrq_voyager_dump_op);
+#endif
+ } else {
+ printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
+ }
+}
+
+void
+voyager_system_interrupt(int cpl, void *dev_id)
+{
+ printk("Voyager: detected system interrupt\n");
+}
+
+/* Routine to read information from the extended CMOS area */
+__u8
+voyager_extended_cmos_read(__u16 addr)
+{
+ outb(addr & 0xff, 0x74);
+ outb((addr >> 8) & 0xff, 0x75);
+ return inb(0x76);
+}
+
+/* internal definitions for the SUS Click Map of memory */
+
+#define CLICK_ENTRIES 16
+#define CLICK_SIZE 4096 /* click to byte conversion for Length */
+
+typedef struct ClickMap {
+ struct Entry {
+ __u32 Address;
+ __u32 Length;
+ } Entry[CLICK_ENTRIES];
+} ClickMap_t;
+
+
+/* This routine is pretty much an awful hack to read the bios clickmap by
+ * mapping it into page 0. There are usually three regions in the map:
+ * Base Memory
+ * Extended Memory
+ * zero length marker for end of map
+ *
+ * Returns are 0 for failure and 1 for success on extracting region.
+ */
+int __init
+voyager_memory_detect(int region, __u32 *start, __u32 *length)
+{
+ int i;
+ int retval = 0;
+ __u8 cmos[4];
+ ClickMap_t *map;
+ unsigned long map_addr;
+ unsigned long old;
+
+ if(region >= CLICK_ENTRIES) {
+ printk("Voyager: Illegal ClickMap region %d\n", region);
+ return 0;
+ }
+
+ for(i = 0; i < sizeof(cmos); i++)
+ cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i);
+
+ map_addr = *(unsigned long *)cmos;
+
+ /* steal page 0 for this */
+ old = pg0[0];
+ pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT);
+ local_flush_tlb();
+ /* now clear everything out but page 0 */
+ map = (ClickMap_t *)(map_addr & (~PAGE_MASK));
+
+ /* zero length is the end of the clickmap */
+ if(map->Entry[region].Length != 0) {
+ *length = map->Entry[region].Length * CLICK_SIZE;
+ *start = map->Entry[region].Address;
+ retval = 1;
+ }
+
+ /* replace the mapping */
+ pg0[0] = old;
+ local_flush_tlb();
+ return retval;
+}
+
+/* voyager specific handling code for timer interrupts. Used to hand
+ * off the timer tick to the SMP code, since the VIC doesn't have an
+ * internal timer (The QIC does, but that's another story). */
+void
+voyager_timer_interrupt(void)
+{
+ if((jiffies & 0x3ff) == 0) {
+
+ /* There seems to be something flaky in either
+ * hardware or software that is resetting the timer 0
+ * count to something much higher than it should be
+ * This seems to occur in the boot sequence, just
+ * before root is mounted. Therefore, every 10
+ * seconds or so, we sanity check the timer zero count
+ * and kick it back to where it should be.
+ *
+ * FIXME: This is the most awful hack yet seen. I
+ * should work out exactly what is interfering with
+ * the timer count settings early in the boot sequence
+ * and swiftly introduce it to something sharp and
+ * pointy. */
+ __u16 val;
+
+ spin_lock(&i8253_lock);
+
+ outb_p(0x00, 0x43);
+ val = inb_p(0x40);
+ val |= inb(0x40) << 8;
+ spin_unlock(&i8253_lock);
+
+ if(val > LATCH) {
+ printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val);
+ spin_lock(&i8253_lock);
+ outb(0x34,0x43);
+ outb_p(LATCH & 0xff , 0x40); /* LSB */
+ outb(LATCH >> 8 , 0x40); /* MSB */
+ spin_unlock(&i8253_lock);
+ }
+ }
+#ifdef CONFIG_SMP
+ smp_vic_timer_interrupt();
+#endif
+}
+
+void
+voyager_power_off(void)
+{
+ printk("VOYAGER Power Off\n");
+
+ if(voyager_level == 5) {
+ voyager_cat_power_off();
+ } else if(voyager_level == 4) {
+ /* This doesn't apparently work on most L4 machines,
+ * but the specs say to do this to get automatic power
+ * off. Unfortunately, if it doesn't power off the
+ * machine, it ends up doing a cold restart, which
+ * isn't really intended, so comment out the code */
+#if 0
+ int port;
+
+
+ /* enable the voyager Configuration Space */
+ outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8,
+ VOYAGER_MC_SETUP);
+ /* the port for the power off flag is an offset from the
+ floating base */
+ port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21;
+ /* set the power off flag */
+ outb(inb(port) | 0x1, port);
+#endif
+ }
+ /* and wait for it to happen */
+ local_irq_disable();
+ for(;;)
+ halt();
+}
+
+/* copied from process.c */
+static inline void
+kb_wait(void)
+{
+ int i;
+
+ for (i=0; i<0x10000; i++)
+ if ((inb_p(0x64) & 0x02) == 0)
+ break;
+}
+
+void
+machine_shutdown(void)
+{
+ /* Architecture specific shutdown needed before a kexec */
+}
+
+void
+machine_restart(char *cmd)
+{
+ printk("Voyager Warm Restart\n");
+ kb_wait();
+
+ if(voyager_level == 5) {
+ /* write magic values to the RTC to inform system that
+ * shutdown is beginning */
+ outb(0x8f, 0x70);
+ outb(0x5 , 0x71);
+
+ udelay(50);
+ outb(0xfe,0x64); /* pull reset low */
+ } else if(voyager_level == 4) {
+ __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
+ __u8 basebd = inb(VOYAGER_MC_SETUP);
+
+ outb(basebd | 0x08, VOYAGER_MC_SETUP);
+ outb(0x02, catbase + 0x21);
+ }
+ local_irq_disable();
+ for(;;)
+ halt();
+}
+
+void
+machine_emergency_restart(void)
+{
+ /*for now, just hook this to a warm restart */
+ machine_restart(NULL);
+}
+
+void
+mca_nmi_hook(void)
+{
+ __u8 dumpval __maybe_unused = inb(0xf823);
+ __u8 swnmi __maybe_unused = inb(0xf813);
+
+ /* FIXME: assume dump switch pressed */
+ /* check to see if the dump switch was pressed */
+ VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi));
+ /* clear swnmi */
+ outb(0xff, 0xf813);
+ /* tell SUS to ignore dump */
+ if(voyager_level == 5 && voyager_SUS != NULL) {
+ if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) {
+ voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND;
+ voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS;
+ udelay(1000);
+ voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP;
+ voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS;
+ }
+ }
+ printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id());
+ show_stack(NULL, NULL);
+ show_state();
+}
+
+
+
+void
+machine_halt(void)
+{
+ /* treat a halt like a power off */
+ machine_power_off();
+}
+
+void machine_power_off(void)
+{
+ if (pm_power_off)
+ pm_power_off();
+}
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/* Copyright (C) 1999,2001
+ *
+ * Author: J.E.J.Bottomley@HansenPartnership.com
+ *
+ * linux/arch/i386/kernel/voyager_cat.c
+ *
+ * This file contains all the logic for manipulating the CAT bus
+ * in a level 5 machine.
+ *
+ * The CAT bus is a serial configuration and test bus. Its primary
+ * uses are to probe the initial configuration of the system and to
+ * diagnose error conditions when a system interrupt occurs. The low
+ * level interface is fairly primitive, so most of this file consists
+ * of bit shift manipulations to send and receive packets on the
+ * serial bus */
+
+#include <linux/types.h>
+#include <linux/completion.h>
+#include <linux/sched.h>
+#include <asm/voyager.h>
+#include <asm/vic.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#ifdef VOYAGER_CAT_DEBUG
+#define CDEBUG(x) printk x
+#else
+#define CDEBUG(x)
+#endif
+
+/* the CAT command port */
+#define CAT_CMD (sspb + 0xe)
+/* the CAT data port */
+#define CAT_DATA (sspb + 0xd)
+
+/* the internal cat functions */
+static void cat_pack(__u8 *msg, __u16 start_bit, __u8 *data,
+ __u16 num_bits);
+static void cat_unpack(__u8 *msg, __u16 start_bit, __u8 *data,
+ __u16 num_bits);
+static void cat_build_header(__u8 *header, const __u16 len,
+ const __u16 smallest_reg_bits,
+ const __u16 longest_reg_bits);
+static int cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp,
+ __u8 reg, __u8 op);
+static int cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp,
+ __u8 reg, __u8 *value);
+static int cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes,
+ __u8 pad_bits);
+static int cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
+ __u8 value);
+static int cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
+ __u8 *value);
+static int cat_subread(voyager_module_t *modp, voyager_asic_t *asicp,
+ __u16 offset, __u16 len, void *buf);
+static int cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
+ __u8 reg, __u8 value);
+static int cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp);
+static int cat_connect(voyager_module_t *modp, voyager_asic_t *asicp);
+
+static inline const char *
+cat_module_name(int module_id)
+{
+ switch(module_id) {
+ case 0x10:
+ return "Processor Slot 0";
+ case 0x11:
+ return "Processor Slot 1";
+ case 0x12:
+ return "Processor Slot 2";
+ case 0x13:
+ return "Processor Slot 4";
+ case 0x14:
+ return "Memory Slot 0";
+ case 0x15:
+ return "Memory Slot 1";
+ case 0x18:
+ return "Primary Microchannel";
+ case 0x19:
+ return "Secondary Microchannel";
+ case 0x1a:
+ return "Power Supply Interface";
+ case 0x1c:
+ return "Processor Slot 5";
+ case 0x1d:
+ return "Processor Slot 6";
+ case 0x1e:
+ return "Processor Slot 7";
+ case 0x1f:
+ return "Processor Slot 8";
+ default:
+ return "Unknown Module";
+ }
+}
+
+static int sspb = 0; /* stores the super port location */
+int voyager_8slot = 0; /* set to true if a 51xx monster */
+
+voyager_module_t *voyager_cat_list;
+
+/* the I/O port assignments for the VIC and QIC */
+static struct resource vic_res = {
+ .name = "Voyager Interrupt Controller",
+ .start = 0xFC00,
+ .end = 0xFC6F
+};
+static struct resource qic_res = {
+ .name = "Quad Interrupt Controller",
+ .start = 0xFC70,
+ .end = 0xFCFF
+};
+
+/* This function is used to pack a data bit stream inside a message.
+ * It writes num_bits of the data buffer in msg starting at start_bit.
+ * Note: This function assumes that any unused bit in the data stream
+ * is set to zero so that the ors will work correctly */
+static void
+cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
+{
+ /* compute initial shift needed */
+ const __u16 offset = start_bit % BITS_PER_BYTE;
+ __u16 len = num_bits / BITS_PER_BYTE;
+ __u16 byte = start_bit / BITS_PER_BYTE;
+ __u16 residue = (num_bits % BITS_PER_BYTE) + offset;
+ int i;
+
+ /* adjust if we have more than a byte of residue */
+ if(residue >= BITS_PER_BYTE) {
+ residue -= BITS_PER_BYTE;
+ len++;
+ }
+
+ /* clear out the bits. We assume here that if len==0 then
+ * residue >= offset. This is always true for the catbus
+ * operations */
+ msg[byte] &= 0xff << (BITS_PER_BYTE - offset);
+ msg[byte++] |= data[0] >> offset;
+ if(len == 0)
+ return;
+ for(i = 1; i < len; i++)
+ msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset))
+ | (data[i] >> offset);
+ if(residue != 0) {
+ __u8 mask = 0xff >> residue;
+ __u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset)
+ | (data[i] >> offset);
+
+ last_byte &= ~mask;
+ msg[byte] &= mask;
+ msg[byte] |= last_byte;
+ }
+ return;
+}
+/* unpack the data again (same arguments as cat_pack()). data buffer
+ * must be zero populated.
+ *
+ * Function: given a message string move to start_bit and copy num_bits into
+ * data (starting at bit 0 in data).
+ */
+static void
+cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
+{
+ /* compute initial shift needed */
+ const __u16 offset = start_bit % BITS_PER_BYTE;
+ __u16 len = num_bits / BITS_PER_BYTE;
+ const __u8 last_bits = num_bits % BITS_PER_BYTE;
+ __u16 byte = start_bit / BITS_PER_BYTE;
+ int i;
+
+ if(last_bits != 0)
+ len++;
+
+ /* special case: want < 8 bits from msg and we can get it from
+ * a single byte of the msg */
+ if(len == 0 && BITS_PER_BYTE - offset >= num_bits) {
+ data[0] = msg[byte] << offset;
+ data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
+ return;
+ }
+ for(i = 0; i < len; i++) {
+ /* this annoying if has to be done just in case a read of
+ * msg one beyond the array causes a panic */
+ if(offset != 0) {
+ data[i] = msg[byte++] << offset;
+ data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
+ }
+ else {
+ data[i] = msg[byte++];
+ }
+ }
+ /* do we need to truncate the final byte */
+ if(last_bits != 0) {
+ data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits);
+ }
+ return;
+}
+
+static void
+cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits,
+ const __u16 longest_reg_bits)
+{
+ int i;
+ __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
+ __u8 *last_byte = &header[len - 1];
+
+ if(start_bit == 0)
+ start_bit = 1; /* must have at least one bit in the hdr */
+
+ for(i=0; i < len; i++)
+ header[i] = 0;
+
+ for(i = start_bit; i > 0; i--)
+ *last_byte = ((*last_byte) << 1) + 1;
+
+}
+
+static int
+cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op)
+{
+ __u8 parity, inst, inst_buf[4] = { 0 };
+ __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
+ __u16 ibytes, hbytes, padbits;
+ int i;
+
+ /*
+ * Parity is the parity of the register number + 1 (READ_REGISTER
+ * and WRITE_REGISTER always add '1' to the number of bits == 1)
+ */
+ parity = (__u8)(1 + (reg & 0x01) +
+ ((__u8)(reg & 0x02) >> 1) +
+ ((__u8)(reg & 0x04) >> 2) +
+ ((__u8)(reg & 0x08) >> 3)) % 2;
+
+ inst = ((parity << 7) | (reg << 2) | op);
+
+ outb(VOYAGER_CAT_IRCYC, CAT_CMD);
+ if(!modp->scan_path_connected) {
+ if(asicp->asic_id != VOYAGER_CAT_ID) {
+ printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
+ return 1;
+ }
+ outb(VOYAGER_CAT_HEADER, CAT_DATA);
+ outb(inst, CAT_DATA);
+ if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
+ CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
+ return 1;
+ }
+ return 0;
+ }
+ ibytes = modp->inst_bits / BITS_PER_BYTE;
+ if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
+ padbits = BITS_PER_BYTE - padbits;
+ ibytes++;
+ }
+ hbytes = modp->largest_reg / BITS_PER_BYTE;
+ if(modp->largest_reg % BITS_PER_BYTE)
+ hbytes++;
+ CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
+ /* initialise the instruction sequence to 0xff */
+ for(i=0; i < ibytes + hbytes; i++)
+ iseq[i] = 0xff;
+ cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
+ cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
+ inst_buf[0] = inst;
+ inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
+ cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
+#ifdef VOYAGER_CAT_DEBUG
+ printk("ins = 0x%x, iseq: ", inst);
+ for(i=0; i< ibytes + hbytes; i++)
+ printk("0x%x ", iseq[i]);
+ printk("\n");
+#endif
+ if(cat_shiftout(iseq, ibytes, hbytes, padbits)) {
+ CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
+ return 1;
+ }
+ CDEBUG(("CAT SHIFTOUT DONE\n"));
+ return 0;
+}
+
+static int
+cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
+ __u8 *value)
+{
+ if(!modp->scan_path_connected) {
+ if(asicp->asic_id != VOYAGER_CAT_ID) {
+ CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
+ return 1;
+ }
+ if(reg > VOYAGER_SUBADDRHI)
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ outb(VOYAGER_CAT_DRCYC, CAT_CMD);
+ outb(VOYAGER_CAT_HEADER, CAT_DATA);
+ *value = inb(CAT_DATA);
+ outb(0xAA, CAT_DATA);
+ if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
+ CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
+ return 1;
+ }
+ return 0;
+ }
+ else {
+ __u16 sbits = modp->num_asics -1 + asicp->ireg_length;
+ __u16 sbytes = sbits / BITS_PER_BYTE;
+ __u16 tbytes;
+ __u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE];
+ __u8 padbits;
+ int i;
+
+ outb(VOYAGER_CAT_DRCYC, CAT_CMD);
+
+ if((padbits = sbits % BITS_PER_BYTE) != 0) {
+ padbits = BITS_PER_BYTE - padbits;
+ sbytes++;
+ }
+ tbytes = asicp->ireg_length / BITS_PER_BYTE;
+ if(asicp->ireg_length % BITS_PER_BYTE)
+ tbytes++;
+ CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
+ tbytes, sbytes, padbits));
+ cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
+
+
+ for(i = tbytes - 1; i >= 0; i--) {
+ outb(trailer[i], CAT_DATA);
+ string[sbytes + i] = inb(CAT_DATA);
+ }
+
+ for(i = sbytes - 1; i >= 0; i--) {
+ outb(0xaa, CAT_DATA);
+ string[i] = inb(CAT_DATA);
+ }
+ *value = 0;
+ cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length);
+#ifdef VOYAGER_CAT_DEBUG
+ printk("value=0x%x, string: ", *value);
+ for(i=0; i< tbytes+sbytes; i++)
+ printk("0x%x ", string[i]);
+ printk("\n");
+#endif
+
+ /* sanity check the rest of the return */
+ for(i=0; i < tbytes; i++) {
+ __u8 input = 0;
+
+ cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE);
+ if(trailer[i] != input) {
+ CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
+ return 1;
+ }
+ }
+ CDEBUG(("cat_getdata DONE\n"));
+ return 0;
+ }
+}
+
+static int
+cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
+{
+ int i;
+
+ for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
+ outb(data[i], CAT_DATA);
+
+ for(i = header_bytes - 1; i >= 0; i--) {
+ __u8 header = 0;
+ __u8 input;
+
+ outb(data[i], CAT_DATA);
+ input = inb(CAT_DATA);
+ CDEBUG(("cat_shiftout: returned 0x%x\n", input));
+ cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
+ &header, BITS_PER_BYTE);
+ if(input != header) {
+ CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int
+cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
+ __u8 reg, __u8 value)
+{
+ outb(VOYAGER_CAT_DRCYC, CAT_CMD);
+ if(!modp->scan_path_connected) {
+ if(asicp->asic_id != VOYAGER_CAT_ID) {
+ CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
+ return 1;
+ }
+ outb(VOYAGER_CAT_HEADER, CAT_DATA);
+ outb(value, CAT_DATA);
+ if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
+ CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
+ return 1;
+ }
+ if(reg > VOYAGER_SUBADDRHI) {
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ }
+
+ return 0;
+ }
+ else {
+ __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
+ __u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE;
+ __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH],
+ hseq[VOYAGER_MAX_REG_SIZE];
+ int i;
+
+ if((padbits = (modp->num_asics - 1
+ + asicp->ireg_length) % BITS_PER_BYTE) != 0) {
+ padbits = BITS_PER_BYTE - padbits;
+ dbytes++;
+ }
+ if(asicp->ireg_length % BITS_PER_BYTE)
+ hbytes++;
+
+ cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
+
+ for(i = 0; i < dbytes + hbytes; i++)
+ dseq[i] = 0xff;
+ CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
+ dbytes, hbytes, padbits));
+ cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
+ hseq, hbytes * BITS_PER_BYTE);
+ cat_pack(dseq, asicp->asic_location, &value,
+ asicp->ireg_length);
+#ifdef VOYAGER_CAT_DEBUG
+ printk("dseq ");
+ for(i=0; i<hbytes+dbytes; i++) {
+ printk("0x%x ", dseq[i]);
+ }
+ printk("\n");
+#endif
+ return cat_shiftout(dseq, dbytes, hbytes, padbits);
+ }
+}
+
+static int
+cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
+ __u8 value)
+{
+ if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
+ return 1;
+ return cat_senddata(modp, asicp, reg, value);
+}
+
+static int
+cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
+ __u8 *value)
+{
+ if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
+ return 1;
+ return cat_getdata(modp, asicp, reg, value);
+}
+
+static int
+cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
+ __u16 len)
+{
+ __u8 val;
+
+ if(len > 1) {
+ /* set auto increment */
+ __u8 newval;
+
+ if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
+ CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
+ return 1;
+ }
+ CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val));
+ newval = val | VOYAGER_AUTO_INC;
+ if(newval != val) {
+ if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
+ CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
+ return 1;
+ }
+ }
+ }
+ if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) {
+ CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
+ return 1;
+ }
+ if(asicp->subaddr > VOYAGER_SUBADDR_LO) {
+ if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) {
+ CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
+ return 1;
+ }
+ cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
+ CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val));
+ }
+ cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val);
+ CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val));
+ return 0;
+}
+
+static int
+cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
+ __u16 len, void *buf)
+{
+ int i, retval;
+
+ /* FIXME: need special actions for VOYAGER_CAT_ID here */
+ if(asicp->asic_id == VOYAGER_CAT_ID) {
+ CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n"));
+ /* FIXME -- This is supposed to be handled better
+ * There is a problem writing to the cat asic in the
+ * PSI. The 30us delay seems to work, though */
+ udelay(30);
+ }
+
+ if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
+ printk("cat_subwrite: cat_subaddrsetup FAILED\n");
+ return retval;
+ }
+
+ if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) {
+ printk("cat_subwrite: cat_sendinst FAILED\n");
+ return 1;
+ }
+ for(i = 0; i < len; i++) {
+ if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) {
+ printk("cat_subwrite: cat_sendata element at %d FAILED\n", i);
+ return 1;
+ }
+ }
+ return 0;
+}
+static int
+cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
+ __u16 len, void *buf)
+{
+ int i, retval;
+
+ if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
+ CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
+ return retval;
+ }
+
+ if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
+ CDEBUG(("cat_subread: cat_sendinst failed\n"));
+ return 1;
+ }
+ for(i = 0; i < len; i++) {
+ if(cat_getdata(modp, asicp, 0xFF,
+ &((__u8 *)buf)[i])) {
+ CDEBUG(("cat_subread: cat_getdata element %d failed\n", i));
+ return 1;
+ }
+ }
+ return 0;
+}
+
+
+/* buffer for storing EPROM data read in during initialisation */
+static __initdata __u8 eprom_buf[0xFFFF];
+static voyager_module_t *voyager_initial_module;
+
+/* Initialise the cat bus components. We assume this is called by the
+ * boot cpu *after* all memory initialisation has been done (so we can
+ * use kmalloc) but before smp initialisation, so we can probe the SMP
+ * configuration and pick up necessary information. */
+void
+voyager_cat_init(void)
+{
+ voyager_module_t **modpp = &voyager_initial_module;
+ voyager_asic_t **asicpp;
+ voyager_asic_t *qabc_asic = NULL;
+ int i, j;
+ unsigned long qic_addr = 0;
+ __u8 qabc_data[0x20];
+ __u8 num_submodules, val;
+ voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0];
+
+ __u8 cmos[4];
+ unsigned long addr;
+
+ /* initiallise the SUS mailbox */
+ for(i=0; i<sizeof(cmos); i++)
+ cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i);
+ addr = *(unsigned long *)cmos;
+ if((addr & 0xff000000) != 0xff000000) {
+ printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr);
+ } else {
+ static struct resource res;
+
+ res.name = "voyager SUS";
+ res.start = addr;
+ res.end = addr+0x3ff;
+
+ request_resource(&iomem_resource, &res);
+ voyager_SUS = (struct voyager_SUS *)
+ ioremap(addr, 0x400);
+ printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
+ voyager_SUS->SUS_version);
+ voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
+ voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
+ }
+
+ /* clear the processor counts */
+ voyager_extended_vic_processors = 0;
+ voyager_quad_processors = 0;
+
+
+
+ printk("VOYAGER: beginning CAT bus probe\n");
+ /* set up the SuperSet Port Block which tells us where the
+ * CAT communication port is */
+ sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100;
+ VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb));
+
+ /* now find out if were 8 slot or normal */
+ if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER)
+ == EIGHT_SLOT_IDENTIFIER) {
+ voyager_8slot = 1;
+ printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n");
+ }
+
+ for(i = VOYAGER_MIN_MODULE;
+ i <= VOYAGER_MAX_MODULE; i++) {
+ __u8 input;
+ int asic;
+ __u16 eprom_size;
+ __u16 sp_offset;
+
+ outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
+ outb(i, VOYAGER_CAT_CONFIG_PORT);
+
+ /* check the presence of the module */
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ outb(VOYAGER_CAT_IRCYC, CAT_CMD);
+ outb(VOYAGER_CAT_HEADER, CAT_DATA);
+ /* stream series of alternating 1's and 0's to stimulate
+ * response */
+ outb(0xAA, CAT_DATA);
+ input = inb(CAT_DATA);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ if(input != VOYAGER_CAT_HEADER) {
+ continue;
+ }
+ CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i,
+ cat_module_name(i)));
+ *modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/
+ if(*modpp == NULL) {
+ printk("**WARNING** kmalloc failure in cat_init\n");
+ continue;
+ }
+ memset(*modpp, 0, sizeof(voyager_module_t));
+ /* need temporary asic for cat_subread. It will be
+ * filled in correctly later */
+ (*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/
+ if((*modpp)->asic == NULL) {
+ printk("**WARNING** kmalloc failure in cat_init\n");
+ continue;
+ }
+ memset((*modpp)->asic, 0, sizeof(voyager_asic_t));
+ (*modpp)->asic->asic_id = VOYAGER_CAT_ID;
+ (*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI;
+ (*modpp)->module_addr = i;
+ (*modpp)->scan_path_connected = 0;
+ if(i == VOYAGER_PSI) {
+ /* Exception leg for modules with no EEPROM */
+ printk("Module \"%s\"\n", cat_module_name(i));
+ continue;
+ }
+
+ CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_disconnect(*modpp, (*modpp)->asic);
+ if(cat_subread(*modpp, (*modpp)->asic,
+ VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
+ &eprom_size)) {
+ printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ if(eprom_size > sizeof(eprom_buf)) {
+ printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
+ if(cat_subread(*modpp, (*modpp)->asic, 0,
+ eprom_size, eprom_buf)) {
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
+ cat_module_name(i), eprom_hdr->version_id,
+ *((__u32 *)eprom_hdr->tracer), eprom_hdr->num_asics);
+ (*modpp)->ee_size = eprom_hdr->ee_size;
+ (*modpp)->num_asics = eprom_hdr->num_asics;
+ asicpp = &((*modpp)->asic);
+ sp_offset = eprom_hdr->scan_path_offset;
+ /* All we really care about are the Quad cards. We
+ * identify them because they are in a processor slot
+ * and have only four asics */
+ if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) {
+ modpp = &((*modpp)->next);
+ continue;
+ }
+ /* Now we know it's in a processor slot, does it have
+ * a quad baseboard submodule */
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
+ &num_submodules);
+ /* lowest two bits, active low */
+ num_submodules = ~(0xfc | num_submodules);
+ CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules));
+ if(num_submodules == 0) {
+ /* fill in the dyadic extended processors */
+ __u8 cpu = i & 0x07;
+
+ printk("Module \"%s\": Dyadic Processor Card\n",
+ cat_module_name(i));
+ voyager_extended_vic_processors |= (1<<cpu);
+ cpu += 4;
+ voyager_extended_vic_processors |= (1<<cpu);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+
+ /* now we want to read the asics on the first submodule,
+ * which should be the quad base board */
+
+ cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
+ CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
+ val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
+ cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
+
+ outb(VOYAGER_CAT_END, CAT_CMD);
+
+
+ CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_disconnect(*modpp, (*modpp)->asic);
+ if(cat_subread(*modpp, (*modpp)->asic,
+ VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
+ &eprom_size)) {
+ printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ if(eprom_size > sizeof(eprom_buf)) {
+ printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
+ if(cat_subread(*modpp, (*modpp)->asic, 0,
+ eprom_size, eprom_buf)) {
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ continue;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ /* Now do everything for the QBB submodule 1 */
+ (*modpp)->ee_size = eprom_hdr->ee_size;
+ (*modpp)->num_asics = eprom_hdr->num_asics;
+ asicpp = &((*modpp)->asic);
+ sp_offset = eprom_hdr->scan_path_offset;
+ /* get rid of the dummy CAT asic and read the real one */
+ kfree((*modpp)->asic);
+ for(asic=0; asic < (*modpp)->num_asics; asic++) {
+ int j;
+ voyager_asic_t *asicp = *asicpp
+ = kzalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/
+ voyager_sp_table_t *sp_table;
+ voyager_at_t *asic_table;
+ voyager_jtt_t *jtag_table;
+
+ if(asicp == NULL) {
+ printk("**WARNING** kmalloc failure in cat_init\n");
+ continue;
+ }
+ asicpp = &(asicp->next);
+ asicp->asic_location = asic;
+ sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset);
+ asicp->asic_id = sp_table->asic_id;
+ asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset);
+ for(j=0; j<4; j++)
+ asicp->jtag_id[j] = asic_table->jtag_id[j];
+ jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset);
+ asicp->ireg_length = jtag_table->ireg_len;
+ asicp->bit_location = (*modpp)->inst_bits;
+ (*modpp)->inst_bits += asicp->ireg_length;
+ if(asicp->ireg_length > (*modpp)->largest_reg)
+ (*modpp)->largest_reg = asicp->ireg_length;
+ if (asicp->ireg_length < (*modpp)->smallest_reg ||
+ (*modpp)->smallest_reg == 0)
+ (*modpp)->smallest_reg = asicp->ireg_length;
+ CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
+ asicp->asic_id, asicp->ireg_length,
+ asicp->bit_location));
+ if(asicp->asic_id == VOYAGER_QUAD_QABC) {
+ CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
+ qabc_asic = asicp;
+ }
+ sp_offset += sizeof(voyager_sp_table_t);
+ }
+ CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n",
+ (*modpp)->inst_bits, (*modpp)->largest_reg,
+ (*modpp)->smallest_reg));
+ /* OK, now we have the QUAD ASICs set up, use them.
+ * we need to:
+ *
+ * 1. Find the Memory area for the Quad CPIs.
+ * 2. Find the Extended VIC processor
+ * 3. Configure a second extended VIC processor (This
+ * cannot be done for the 51xx.
+ * */
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_connect(*modpp, (*modpp)->asic);
+ CDEBUG(("CAT CONNECTED!!\n"));
+ cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
+ qic_addr = qabc_data[5] << 8;
+ qic_addr = (qic_addr | qabc_data[6]) << 8;
+ qic_addr = (qic_addr | qabc_data[7]) << 8;
+ printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
+ cat_module_name(i), qic_addr, qabc_data[8]);
+#if 0 /* plumbing fails---FIXME */
+ if((qabc_data[8] & 0xf0) == 0) {
+ /* FIXME: 32 way 8 CPU slot monster cannot be
+ * plumbed this way---need to check for it */
+
+ printk("Plumbing second Extended Quad Processor\n");
+ /* second VIC line hardwired to Quad CPU 1 */
+ qabc_data[8] |= 0x20;
+ cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
+#ifdef VOYAGER_CAT_DEBUG
+ /* verify plumbing */
+ cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
+ if((qabc_data[8] & 0xf0) == 0) {
+ CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8]));
+ }
+#endif
+ }
+#endif
+
+ {
+ struct resource *res = kzalloc(sizeof(struct resource),GFP_KERNEL);
+ res->name = kmalloc(128, GFP_KERNEL);
+ sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i));
+ res->start = qic_addr;
+ res->end = qic_addr + 0x3ff;
+ request_resource(&iomem_resource, res);
+ }
+
+ qic_addr = (unsigned long)ioremap(qic_addr, 0x400);
+
+ for(j = 0; j < 4; j++) {
+ __u8 cpu;
+
+ if(voyager_8slot) {
+ /* 8 slot has a different mapping,
+ * each slot has only one vic line, so
+ * 1 cpu in each slot must be < 8 */
+ cpu = (i & 0x07) + j*8;
+ } else {
+ cpu = (i & 0x03) + j*4;
+ }
+ if( (qabc_data[8] & (1<<j))) {
+ voyager_extended_vic_processors |= (1<<cpu);
+ }
+ if(qabc_data[8] & (1<<(j+4)) ) {
+ /* Second SET register plumbed: Quad
+ * card has two VIC connected CPUs.
+ * Secondary cannot be booted as a VIC
+ * CPU */
+ voyager_extended_vic_processors |= (1<<cpu);
+ voyager_allowed_boot_processors &= (~(1<<cpu));
+ }
+
+ voyager_quad_processors |= (1<<cpu);
+ voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
+ (qic_addr+(j<<8));
+ CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
+ (unsigned long)voyager_quad_cpi_addr[cpu]));
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+
+
+
+ *asicpp = NULL;
+ modpp = &((*modpp)->next);
+ }
+ *modpp = NULL;
+ printk("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n", voyager_extended_vic_processors, voyager_quad_processors, voyager_allowed_boot_processors);
+ request_resource(&ioport_resource, &vic_res);
+ if(voyager_quad_processors)
+ request_resource(&ioport_resource, &qic_res);
+ /* set up the front power switch */
+}
+
+int
+voyager_cat_readb(__u8 module, __u8 asic, int reg)
+{
+ return 0;
+}
+
+static int
+cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp)
+{
+ __u8 val;
+ int err = 0;
+
+ if(!modp->scan_path_connected)
+ return 0;
+ if(asicp->asic_id != VOYAGER_CAT_ID) {
+ CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
+ return 1;
+ }
+ err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
+ if(err) {
+ CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
+ return err;
+ }
+ val &= VOYAGER_DISCONNECT_ASIC;
+ err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
+ if(err) {
+ CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
+ return err;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ modp->scan_path_connected = 0;
+
+ return 0;
+}
+
+static int
+cat_connect(voyager_module_t *modp, voyager_asic_t *asicp)
+{
+ __u8 val;
+ int err = 0;
+
+ if(modp->scan_path_connected)
+ return 0;
+ if(asicp->asic_id != VOYAGER_CAT_ID) {
+ CDEBUG(("cat_connect: ASIC is not CAT\n"));
+ return 1;
+ }
+
+ err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
+ if(err) {
+ CDEBUG(("cat_connect: failed to read SCANPATH\n"));
+ return err;
+ }
+ val |= VOYAGER_CONNECT_ASIC;
+ err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
+ if(err) {
+ CDEBUG(("cat_connect: failed to write SCANPATH\n"));
+ return err;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ modp->scan_path_connected = 1;
+
+ return 0;
+}
+
+void
+voyager_cat_power_off(void)
+{
+ /* Power the machine off by writing to the PSI over the CAT
+ * bus */
+ __u8 data;
+ voyager_module_t psi = { 0 };
+ voyager_asic_t psi_asic = { 0 };
+
+ psi.asic = &psi_asic;
+ psi.asic->asic_id = VOYAGER_CAT_ID;
+ psi.asic->subaddr = VOYAGER_SUBADDR_HI;
+ psi.module_addr = VOYAGER_PSI;
+ psi.scan_path_connected = 0;
+
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ /* Connect the PSI to the CAT Bus */
+ outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_disconnect(&psi, &psi_asic);
+ /* Read the status */
+ cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ CDEBUG(("PSI STATUS 0x%x\n", data));
+ /* These two writes are power off prep and perform */
+ data = PSI_CLEAR;
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ data = PSI_POWER_DOWN;
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+}
+
+struct voyager_status voyager_status = { 0 };
+
+void
+voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data)
+{
+ voyager_module_t psi = { 0 };
+ voyager_asic_t psi_asic = { 0 };
+
+ psi.asic = &psi_asic;
+ psi.asic->asic_id = VOYAGER_CAT_ID;
+ psi.asic->subaddr = VOYAGER_SUBADDR_HI;
+ psi.module_addr = VOYAGER_PSI;
+ psi.scan_path_connected = 0;
+
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ /* Connect the PSI to the CAT Bus */
+ outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_disconnect(&psi, &psi_asic);
+ switch(cmd) {
+ case VOYAGER_PSI_READ:
+ cat_read(&psi, &psi_asic, reg, data);
+ break;
+ case VOYAGER_PSI_WRITE:
+ cat_write(&psi, &psi_asic, reg, *data);
+ break;
+ case VOYAGER_PSI_SUBREAD:
+ cat_subread(&psi, &psi_asic, reg, 1, data);
+ break;
+ case VOYAGER_PSI_SUBWRITE:
+ cat_subwrite(&psi, &psi_asic, reg, 1, data);
+ break;
+ default:
+ printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
+ break;
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+}
+
+void
+voyager_cat_do_common_interrupt(void)
+{
+ /* This is caused either by a memory parity error or something
+ * in the PSI */
+ __u8 data;
+ voyager_module_t psi = { 0 };
+ voyager_asic_t psi_asic = { 0 };
+ struct voyager_psi psi_reg;
+ int i;
+ re_read:
+ psi.asic = &psi_asic;
+ psi.asic->asic_id = VOYAGER_CAT_ID;
+ psi.asic->subaddr = VOYAGER_SUBADDR_HI;
+ psi.module_addr = VOYAGER_PSI;
+ psi.scan_path_connected = 0;
+
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ /* Connect the PSI to the CAT Bus */
+ outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_disconnect(&psi, &psi_asic);
+ /* Read the status. NOTE: Need to read *all* the PSI regs here
+ * otherwise the cmn int will be reasserted */
+ for(i = 0; i < sizeof(psi_reg.regs); i++) {
+ cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]);
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ if((psi_reg.regs.checkbit & 0x02) == 0) {
+ psi_reg.regs.checkbit |= 0x02;
+ cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
+ printk("VOYAGER RE-READ PSI\n");
+ goto re_read;
+ }
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ for(i = 0; i < sizeof(psi_reg.subregs); i++) {
+ /* This looks strange, but the PSI doesn't do auto increment
+ * correctly */
+ cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i,
+ 1, &((__u8 *)&psi_reg.subregs)[i]);
+ }
+ outb(VOYAGER_CAT_END, CAT_CMD);
+#ifdef VOYAGER_CAT_DEBUG
+ printk("VOYAGER PSI: ");
+ for(i=0; i<sizeof(psi_reg.regs); i++)
+ printk("%02x ", ((__u8 *)&psi_reg.regs)[i]);
+ printk("\n ");
+ for(i=0; i<sizeof(psi_reg.subregs); i++)
+ printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]);
+ printk("\n");
+#endif
+ if(psi_reg.regs.intstatus & PSI_MON) {
+ /* switch off or power fail */
+
+ if(psi_reg.subregs.supply & PSI_SWITCH_OFF) {
+ if(voyager_status.switch_off) {
+ printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n");
+ voyager_cat_power_off();
+ /* not reached */
+ } else {
+ printk(KERN_ERR "Voyager front panel switch turned off\n");
+ voyager_status.switch_off = 1;
+ voyager_status.request_from_kernel = 1;
+ wake_up_process(voyager_thread);
+ }
+ /* Tell the hardware we're taking care of the
+ * shutdown, otherwise it will power the box off
+ * within 3 seconds of the switch being pressed and,
+ * which is much more important to us, continue to
+ * assert the common interrupt */
+ data = PSI_CLR_SWITCH_OFF;
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
+ 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ } else {
+
+ VDEBUG(("Voyager ac fail reg 0x%x\n",
+ psi_reg.subregs.ACfail));
+ if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
+ /* No further update */
+ return;
+ }
+#if 0
+ /* Don't bother trying to find out who failed.
+ * FIXME: This probably makes the code incorrect on
+ * anything other than a 345x */
+ for(i=0; i< 5; i++) {
+ if( psi_reg.subregs.ACfail &(1<<i)) {
+ break;
+ }
+ }
+ printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
+#endif
+ /* DON'T do this: it shuts down the AC PSI
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ data = PSI_MASK_MASK | i;
+ cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
+ 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ */
+ printk(KERN_ERR "Voyager AC power failure\n");
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ data = PSI_COLD_START;
+ cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
+ 1, &data);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ voyager_status.power_fail = 1;
+ voyager_status.request_from_kernel = 1;
+ wake_up_process(voyager_thread);
+ }
+
+
+ } else if(psi_reg.regs.intstatus & PSI_FAULT) {
+ /* Major fault! */
+ printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n");
+ voyager_cat_power_off();
+ /* not reached */
+ } else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
+ | PSI_CURRENT | PSI_DVM
+ | PSI_PSCFAULT | PSI_STAT_CHG)) {
+ /* other psi fault */
+
+ printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
+ /* clear the PSI fault */
+ outb(VOYAGER_CAT_RUN, CAT_CMD);
+ cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
+ outb(VOYAGER_CAT_END, CAT_CMD);
+ }
+}
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/* Copyright (C) 1999,2001
+ *
+ * Author: J.E.J.Bottomley@HansenPartnership.com
+ *
+ * linux/arch/i386/kernel/voyager_smp.c
+ *
+ * This file provides all the same external entries as smp.c but uses
+ * the voyager hal to provide the functionality
+ */
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/mc146818rtc.h>
+#include <linux/cache.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/bootmem.h>
+#include <linux/completion.h>
+#include <asm/desc.h>
+#include <asm/voyager.h>
+#include <asm/vic.h>
+#include <asm/mtrr.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+#include <asm/arch_hooks.h>
+
+/* TLB state -- visible externally, indexed physically */
+DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0 };
+
+/* CPU IRQ affinity -- set to all ones initially */
+static unsigned long cpu_irq_affinity[NR_CPUS] __cacheline_aligned = { [0 ... NR_CPUS-1] = ~0UL };
+
+/* per CPU data structure (for /proc/cpuinfo et al), visible externally
+ * indexed physically */
+struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
+EXPORT_SYMBOL(cpu_data);
+
+/* physical ID of the CPU used to boot the system */
+unsigned char boot_cpu_id;
+
+/* The memory line addresses for the Quad CPIs */
+struct voyager_qic_cpi *voyager_quad_cpi_addr[NR_CPUS] __cacheline_aligned;
+
+/* The masks for the Extended VIC processors, filled in by cat_init */
+__u32 voyager_extended_vic_processors = 0;
+
+/* Masks for the extended Quad processors which cannot be VIC booted */
+__u32 voyager_allowed_boot_processors = 0;
+
+/* The mask for the Quad Processors (both extended and non-extended) */
+__u32 voyager_quad_processors = 0;
+
+/* Total count of live CPUs, used in process.c to display
+ * the CPU information and in irq.c for the per CPU irq
+ * activity count. Finally exported by i386_ksyms.c */
+static int voyager_extended_cpus = 1;
+
+/* Have we found an SMP box - used by time.c to do the profiling
+ interrupt for timeslicing; do not set to 1 until the per CPU timer
+ interrupt is active */
+int smp_found_config = 0;
+
+/* Used for the invalidate map that's also checked in the spinlock */
+static volatile unsigned long smp_invalidate_needed;
+
+/* Bitmask of currently online CPUs - used by setup.c for
+ /proc/cpuinfo, visible externally but still physical */
+cpumask_t cpu_online_map = CPU_MASK_NONE;
+EXPORT_SYMBOL(cpu_online_map);
+
+/* Bitmask of CPUs present in the system - exported by i386_syms.c, used
+ * by scheduler but indexed physically */
+cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
+
+
+/* The internal functions */
+static void send_CPI(__u32 cpuset, __u8 cpi);
+static void ack_CPI(__u8 cpi);
+static int ack_QIC_CPI(__u8 cpi);
+static void ack_special_QIC_CPI(__u8 cpi);
+static void ack_VIC_CPI(__u8 cpi);
+static void send_CPI_allbutself(__u8 cpi);
+static void mask_vic_irq(unsigned int irq);
+static void unmask_vic_irq(unsigned int irq);
+static unsigned int startup_vic_irq(unsigned int irq);
+static void enable_local_vic_irq(unsigned int irq);
+static void disable_local_vic_irq(unsigned int irq);
+static void before_handle_vic_irq(unsigned int irq);
+static void after_handle_vic_irq(unsigned int irq);
+static void set_vic_irq_affinity(unsigned int irq, cpumask_t mask);
+static void ack_vic_irq(unsigned int irq);
+static void vic_enable_cpi(void);
+static void do_boot_cpu(__u8 cpuid);
+static void do_quad_bootstrap(void);
+
+int hard_smp_processor_id(void);
+int safe_smp_processor_id(void);
+
+/* Inline functions */
+static inline void
+send_one_QIC_CPI(__u8 cpu, __u8 cpi)
+{
+ voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi =
+ (smp_processor_id() << 16) + cpi;
+}
+
+static inline void
+send_QIC_CPI(__u32 cpuset, __u8 cpi)
+{
+ int cpu;
+
+ for_each_online_cpu(cpu) {
+ if(cpuset & (1<<cpu)) {
+#ifdef VOYAGER_DEBUG
+ if(!cpu_isset(cpu, cpu_online_map))
+ VDEBUG(("CPU%d sending cpi %d to CPU%d not in cpu_online_map\n", hard_smp_processor_id(), cpi, cpu));
+#endif
+ send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET);
+ }
+ }
+}
+
+static inline void
+wrapper_smp_local_timer_interrupt(void)
+{
+ irq_enter();
+ smp_local_timer_interrupt();
+ irq_exit();
+}
+
+static inline void
+send_one_CPI(__u8 cpu, __u8 cpi)
+{
+ if(voyager_quad_processors & (1<<cpu))
+ send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET);
+ else
+ send_CPI(1<<cpu, cpi);
+}
+
+static inline void
+send_CPI_allbutself(__u8 cpi)
+{
+ __u8 cpu = smp_processor_id();
+ __u32 mask = cpus_addr(cpu_online_map)[0] & ~(1 << cpu);
+ send_CPI(mask, cpi);
+}
+
+static inline int
+is_cpu_quad(void)
+{
+ __u8 cpumask = inb(VIC_PROC_WHO_AM_I);
+ return ((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER);
+}
+
+static inline int
+is_cpu_extended(void)
+{
+ __u8 cpu = hard_smp_processor_id();
+
+ return(voyager_extended_vic_processors & (1<<cpu));
+}
+
+static inline int
+is_cpu_vic_boot(void)
+{
+ __u8 cpu = hard_smp_processor_id();
+
+ return(voyager_extended_vic_processors
+ & voyager_allowed_boot_processors & (1<<cpu));
+}
+
+
+static inline void
+ack_CPI(__u8 cpi)
+{
+ switch(cpi) {
+ case VIC_CPU_BOOT_CPI:
+ if(is_cpu_quad() && !is_cpu_vic_boot())
+ ack_QIC_CPI(cpi);
+ else
+ ack_VIC_CPI(cpi);
+ break;
+ case VIC_SYS_INT:
+ case VIC_CMN_INT:
+ /* These are slightly strange. Even on the Quad card,
+ * They are vectored as VIC CPIs */
+ if(is_cpu_quad())
+ ack_special_QIC_CPI(cpi);
+ else
+ ack_VIC_CPI(cpi);
+ break;
+ default:
+ printk("VOYAGER ERROR: CPI%d is in common CPI code\n", cpi);
+ break;
+ }
+}
+
+/* local variables */
+
+/* The VIC IRQ descriptors -- these look almost identical to the
+ * 8259 IRQs except that masks and things must be kept per processor
+ */
+static struct irq_chip vic_chip = {
+ .name = "VIC",
+ .startup = startup_vic_irq,
+ .mask = mask_vic_irq,
+ .unmask = unmask_vic_irq,
+ .set_affinity = set_vic_irq_affinity,
+};
+
+/* used to count up as CPUs are brought on line (starts at 0) */
+static int cpucount = 0;
+
+/* steal a page from the bottom of memory for the trampoline and
+ * squirrel its address away here. This will be in kernel virtual
+ * space */
+static __u32 trampoline_base;
+
+/* The per cpu profile stuff - used in smp_local_timer_interrupt */
+static DEFINE_PER_CPU(int, prof_multiplier) = 1;
+static DEFINE_PER_CPU(int, prof_old_multiplier) = 1;
+static DEFINE_PER_CPU(int, prof_counter) = 1;
+
+/* the map used to check if a CPU has booted */
+static __u32 cpu_booted_map;
+
+/* the synchronize flag used to hold all secondary CPUs spinning in
+ * a tight loop until the boot sequence is ready for them */
+static cpumask_t smp_commenced_mask = CPU_MASK_NONE;
+
+/* This is for the new dynamic CPU boot code */
+cpumask_t cpu_callin_map = CPU_MASK_NONE;
+cpumask_t cpu_callout_map = CPU_MASK_NONE;
+EXPORT_SYMBOL(cpu_callout_map);
+cpumask_t cpu_possible_map = CPU_MASK_NONE;
+EXPORT_SYMBOL(cpu_possible_map);
+
+/* The per processor IRQ masks (these are usually kept in sync) */
+static __u16 vic_irq_mask[NR_CPUS] __cacheline_aligned;
+
+/* the list of IRQs to be enabled by the VIC_ENABLE_IRQ_CPI */
+static __u16 vic_irq_enable_mask[NR_CPUS] __cacheline_aligned = { 0 };
+
+/* Lock for enable/disable of VIC interrupts */
+static __cacheline_aligned DEFINE_SPINLOCK(vic_irq_lock);
+
+/* The boot processor is correctly set up in PC mode when it
+ * comes up, but the secondaries need their master/slave 8259
+ * pairs initializing correctly */
+
+/* Interrupt counters (per cpu) and total - used to try to
+ * even up the interrupt handling routines */
+static long vic_intr_total = 0;
+static long vic_intr_count[NR_CPUS] __cacheline_aligned = { 0 };
+static unsigned long vic_tick[NR_CPUS] __cacheline_aligned = { 0 };
+
+/* Since we can only use CPI0, we fake all the other CPIs */
+static unsigned long vic_cpi_mailbox[NR_CPUS] __cacheline_aligned;
+
+/* debugging routine to read the isr of the cpu's pic */
+static inline __u16
+vic_read_isr(void)
+{
+ __u16 isr;
+
+ outb(0x0b, 0xa0);
+ isr = inb(0xa0) << 8;
+ outb(0x0b, 0x20);
+ isr |= inb(0x20);
+
+ return isr;
+}
+
+static __init void
+qic_setup(void)
+{
+ if(!is_cpu_quad()) {
+ /* not a quad, no setup */
+ return;
+ }
+ outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0);
+ outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1);
+
+ if(is_cpu_extended()) {
+ /* the QIC duplicate of the VIC base register */
+ outb(VIC_DEFAULT_CPI_BASE, QIC_VIC_CPI_BASE_REGISTER);
+ outb(QIC_DEFAULT_CPI_BASE, QIC_CPI_BASE_REGISTER);
+
+ /* FIXME: should set up the QIC timer and memory parity
+ * error vectors here */
+ }
+}
+
+static __init void
+vic_setup_pic(void)
+{
+ outb(1, VIC_REDIRECT_REGISTER_1);
+ /* clear the claim registers for dynamic routing */
+ outb(0, VIC_CLAIM_REGISTER_0);
+ outb(0, VIC_CLAIM_REGISTER_1);
+
+ outb(0, VIC_PRIORITY_REGISTER);
+ /* Set the Primary and Secondary Microchannel vector
+ * bases to be the same as the ordinary interrupts
+ *
+ * FIXME: This would be more efficient using separate
+ * vectors. */
+ outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE);
+ outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE);
+ /* Now initiallise the master PIC belonging to this CPU by
+ * sending the four ICWs */
+
+ /* ICW1: level triggered, ICW4 needed */
+ outb(0x19, 0x20);
+
+ /* ICW2: vector base */
+ outb(FIRST_EXTERNAL_VECTOR, 0x21);
+
+ /* ICW3: slave at line 2 */
+ outb(0x04, 0x21);
+
+ /* ICW4: 8086 mode */
+ outb(0x01, 0x21);
+
+ /* now the same for the slave PIC */
+
+ /* ICW1: level trigger, ICW4 needed */
+ outb(0x19, 0xA0);
+
+ /* ICW2: slave vector base */
+ outb(FIRST_EXTERNAL_VECTOR + 8, 0xA1);
+
+ /* ICW3: slave ID */
+ outb(0x02, 0xA1);
+
+ /* ICW4: 8086 mode */
+ outb(0x01, 0xA1);
+}
+
+static void
+do_quad_bootstrap(void)
+{
+ if(is_cpu_quad() && is_cpu_vic_boot()) {
+ int i;
+ unsigned long flags;
+ __u8 cpuid = hard_smp_processor_id();
+
+ local_irq_save(flags);
+
+ for(i = 0; i<4; i++) {
+ /* FIXME: this would be >>3 &0x7 on the 32 way */
+ if(((cpuid >> 2) & 0x03) == i)
+ /* don't lower our own mask! */
+ continue;
+
+ /* masquerade as local Quad CPU */
+ outb(QIC_CPUID_ENABLE | i, QIC_PROCESSOR_ID);
+ /* enable the startup CPI */
+ outb(QIC_BOOT_CPI_MASK, QIC_MASK_REGISTER1);
+ /* restore cpu id */
+ outb(0, QIC_PROCESSOR_ID);
+ }
+ local_irq_restore(flags);
+ }
+}
+
+
+/* Set up all the basic stuff: read the SMP config and make all the
+ * SMP information reflect only the boot cpu. All others will be
+ * brought on-line later. */
+void __init
+find_smp_config(void)
+{
+ int i;
+
+ boot_cpu_id = hard_smp_processor_id();
+
+ printk("VOYAGER SMP: Boot cpu is %d\n", boot_cpu_id);
+
+ /* initialize the CPU structures (moved from smp_boot_cpus) */
+ for(i=0; i<NR_CPUS; i++) {
+ cpu_irq_affinity[i] = ~0;
+ }
+ cpu_online_map = cpumask_of_cpu(boot_cpu_id);
+
+ /* The boot CPU must be extended */
+ voyager_extended_vic_processors = 1<<boot_cpu_id;
+ /* initially, all of the first 8 cpu's can boot */
+ voyager_allowed_boot_processors = 0xff;
+ /* set up everything for just this CPU, we can alter
+ * this as we start the other CPUs later */
+ /* now get the CPU disposition from the extended CMOS */
+ cpus_addr(phys_cpu_present_map)[0] = voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK);
+ cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 1) << 8;
+ cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 2) << 16;
+ cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 3) << 24;
+ cpu_possible_map = phys_cpu_present_map;
+ printk("VOYAGER SMP: phys_cpu_present_map = 0x%lx\n", cpus_addr(phys_cpu_present_map)[0]);
+ /* Here we set up the VIC to enable SMP */
+ /* enable the CPIs by writing the base vector to their register */
+ outb(VIC_DEFAULT_CPI_BASE, VIC_CPI_BASE_REGISTER);
+ outb(1, VIC_REDIRECT_REGISTER_1);
+ /* set the claim registers for static routing --- Boot CPU gets
+ * all interrupts untill all other CPUs started */
+ outb(0xff, VIC_CLAIM_REGISTER_0);
+ outb(0xff, VIC_CLAIM_REGISTER_1);
+ /* Set the Primary and Secondary Microchannel vector
+ * bases to be the same as the ordinary interrupts
+ *
+ * FIXME: This would be more efficient using separate
+ * vectors. */
+ outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE);
+ outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE);
+
+ /* Finally tell the firmware that we're driving */
+ outb(inb(VOYAGER_SUS_IN_CONTROL_PORT) | VOYAGER_IN_CONTROL_FLAG,
+ VOYAGER_SUS_IN_CONTROL_PORT);
+
+ current_thread_info()->cpu = boot_cpu_id;
+ x86_write_percpu(cpu_number, boot_cpu_id);
+}
+
+/*
+ * The bootstrap kernel entry code has set these up. Save them
+ * for a given CPU, id is physical */
+void __init
+smp_store_cpu_info(int id)
+{
+ struct cpuinfo_x86 *c=&cpu_data[id];
+
+ *c = boot_cpu_data;
+
+ identify_secondary_cpu(c);
+}
+
+/* set up the trampoline and return the physical address of the code */
+static __u32 __init
+setup_trampoline(void)
+{
+ /* these two are global symbols in trampoline.S */
+ extern __u8 trampoline_end[];
+ extern __u8 trampoline_data[];
+
+ memcpy((__u8 *)trampoline_base, trampoline_data,
+ trampoline_end - trampoline_data);
+ return virt_to_phys((__u8 *)trampoline_base);
+}
+
+/* Routine initially called when a non-boot CPU is brought online */
+static void __init
+start_secondary(void *unused)
+{
+ __u8 cpuid = hard_smp_processor_id();
+ /* external functions not defined in the headers */
+ extern void calibrate_delay(void);
+
+ cpu_init();
+
+ /* OK, we're in the routine */
+ ack_CPI(VIC_CPU_BOOT_CPI);
+
+ /* setup the 8259 master slave pair belonging to this CPU ---
+ * we won't actually receive any until the boot CPU
+ * relinquishes it's static routing mask */
+ vic_setup_pic();
+
+ qic_setup();
+
+ if(is_cpu_quad() && !is_cpu_vic_boot()) {
+ /* clear the boot CPI */
+ __u8 dummy;
+
+ dummy = voyager_quad_cpi_addr[cpuid]->qic_cpi[VIC_CPU_BOOT_CPI].cpi;
+ printk("read dummy %d\n", dummy);
+ }
+
+ /* lower the mask to receive CPIs */
+ vic_enable_cpi();
+
+ VDEBUG(("VOYAGER SMP: CPU%d, stack at about %p\n", cpuid, &cpuid));
+
+ /* enable interrupts */
+ local_irq_enable();
+
+ /* get our bogomips */
+ calibrate_delay();
+
+ /* save our processor parameters */
+ smp_store_cpu_info(cpuid);
+
+ /* if we're a quad, we may need to bootstrap other CPUs */
+ do_quad_bootstrap();
+
+ /* FIXME: this is rather a poor hack to prevent the CPU
+ * activating softirqs while it's supposed to be waiting for
+ * permission to proceed. Without this, the new per CPU stuff
+ * in the softirqs will fail */
+ local_irq_disable();
+ cpu_set(cpuid, cpu_callin_map);
+
+ /* signal that we're done */
+ cpu_booted_map = 1;
+
+ while (!cpu_isset(cpuid, smp_commenced_mask))
+ rep_nop();
+ local_irq_enable();
+
+ local_flush_tlb();
+
+ cpu_set(cpuid, cpu_online_map);
+ wmb();
+ cpu_idle();
+}
+
+
+/* Routine to kick start the given CPU and wait for it to report ready
+ * (or timeout in startup). When this routine returns, the requested
+ * CPU is either fully running and configured or known to be dead.
+ *
+ * We call this routine sequentially 1 CPU at a time, so no need for
+ * locking */
+
+static void __init
+do_boot_cpu(__u8 cpu)
+{
+ struct task_struct *idle;
+ int timeout;
+ unsigned long flags;
+ int quad_boot = (1<<cpu) & voyager_quad_processors
+ & ~( voyager_extended_vic_processors
+ & voyager_allowed_boot_processors);
+
+ /* This is an area in head.S which was used to set up the
+ * initial kernel stack. We need to alter this to give the
+ * booting CPU a new stack (taken from its idle process) */
+ extern struct {
+ __u8 *esp;
+ unsigned short ss;
+ } stack_start;
+ /* This is the format of the CPI IDT gate (in real mode) which
+ * we're hijacking to boot the CPU */
+ union IDTFormat {
+ struct seg {
+ __u16 Offset;
+ __u16 Segment;
+ } idt;
+ __u32 val;
+ } hijack_source;
+
+ __u32 *hijack_vector;
+ __u32 start_phys_address = setup_trampoline();
+
+ /* There's a clever trick to this: The linux trampoline is
+ * compiled to begin at absolute location zero, so make the
+ * address zero but have the data segment selector compensate
+ * for the actual address */
+ hijack_source.idt.Offset = start_phys_address & 0x000F;
+ hijack_source.idt.Segment = (start_phys_address >> 4) & 0xFFFF;
+
+ cpucount++;
+ alternatives_smp_switch(1);
+
+ idle = fork_idle(cpu);
+ if(IS_ERR(idle))
+ panic("failed fork for CPU%d", cpu);
+ idle->thread.eip = (unsigned long) start_secondary;
+ /* init_tasks (in sched.c) is indexed logically */
+ stack_start.esp = (void *) idle->thread.esp;
+
+ init_gdt(cpu);
+ per_cpu(current_task, cpu) = idle;
+ early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
+ irq_ctx_init(cpu);
+
+ /* Note: Don't modify initial ss override */
+ VDEBUG(("VOYAGER SMP: Booting CPU%d at 0x%lx[%x:%x], stack %p\n", cpu,
+ (unsigned long)hijack_source.val, hijack_source.idt.Segment,
+ hijack_source.idt.Offset, stack_start.esp));
+
+ /* init lowmem identity mapping */
+ clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
+ min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));
+ flush_tlb_all();
+
+ if(quad_boot) {
+ printk("CPU %d: non extended Quad boot\n", cpu);
+ hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + QIC_DEFAULT_CPI_BASE)*4);
+ *hijack_vector = hijack_source.val;
+ } else {
+ printk("CPU%d: extended VIC boot\n", cpu);
+ hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + VIC_DEFAULT_CPI_BASE)*4);
+ *hijack_vector = hijack_source.val;
+ /* VIC errata, may also receive interrupt at this address */
+ hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_ERRATA_CPI + VIC_DEFAULT_CPI_BASE)*4);
+ *hijack_vector = hijack_source.val;
+ }
+ /* All non-boot CPUs start with interrupts fully masked. Need
+ * to lower the mask of the CPI we're about to send. We do
+ * this in the VIC by masquerading as the processor we're
+ * about to boot and lowering its interrupt mask */
+ local_irq_save(flags);
+ if(quad_boot) {
+ send_one_QIC_CPI(cpu, VIC_CPU_BOOT_CPI);
+ } else {
+ outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID);
+ /* here we're altering registers belonging to `cpu' */
+
+ outb(VIC_BOOT_INTERRUPT_MASK, 0x21);
+ /* now go back to our original identity */
+ outb(boot_cpu_id, VIC_PROCESSOR_ID);
+
+ /* and boot the CPU */
+
+ send_CPI((1<<cpu), VIC_CPU_BOOT_CPI);
+ }
+ cpu_booted_map = 0;
+ local_irq_restore(flags);
+
+ /* now wait for it to become ready (or timeout) */
+ for(timeout = 0; timeout < 50000; timeout++) {
+ if(cpu_booted_map)
+ break;
+ udelay(100);
+ }
+ /* reset the page table */
+ zap_low_mappings();
+
+ if (cpu_booted_map) {
+ VDEBUG(("CPU%d: Booted successfully, back in CPU %d\n",
+ cpu, smp_processor_id()));
+
+ printk("CPU%d: ", cpu);
+ print_cpu_info(&cpu_data[cpu]);
+ wmb();
+ cpu_set(cpu, cpu_callout_map);
+ cpu_set(cpu, cpu_present_map);
+ }
+ else {
+ printk("CPU%d FAILED TO BOOT: ", cpu);
+ if (*((volatile unsigned char *)phys_to_virt(start_phys_address))==0xA5)
+ printk("Stuck.\n");
+ else
+ printk("Not responding.\n");
+
+ cpucount--;
+ }
+}
+
+void __init
+smp_boot_cpus(void)
+{
+ int i;
+
+ /* CAT BUS initialisation must be done after the memory */
+ /* FIXME: The L4 has a catbus too, it just needs to be
+ * accessed in a totally different way */
+ if(voyager_level == 5) {
+ voyager_cat_init();
+
+ /* now that the cat has probed the Voyager System Bus, sanity
+ * check the cpu map */
+ if( ((voyager_quad_processors | voyager_extended_vic_processors)
+ & cpus_addr(phys_cpu_present_map)[0]) != cpus_addr(phys_cpu_present_map)[0]) {
+ /* should panic */
+ printk("\n\n***WARNING*** Sanity check of CPU present map FAILED\n");
+ }
+ } else if(voyager_level == 4)
+ voyager_extended_vic_processors = cpus_addr(phys_cpu_present_map)[0];
+
+ /* this sets up the idle task to run on the current cpu */
+ voyager_extended_cpus = 1;
+ /* Remove the global_irq_holder setting, it triggers a BUG() on
+ * schedule at the moment */
+ //global_irq_holder = boot_cpu_id;
+
+ /* FIXME: Need to do something about this but currently only works
+ * on CPUs with a tsc which none of mine have.
+ smp_tune_scheduling();
+ */
+ smp_store_cpu_info(boot_cpu_id);
+ printk("CPU%d: ", boot_cpu_id);
+ print_cpu_info(&cpu_data[boot_cpu_id]);
+
+ if(is_cpu_quad()) {
+ /* booting on a Quad CPU */
+ printk("VOYAGER SMP: Boot CPU is Quad\n");
+ qic_setup();
+ do_quad_bootstrap();
+ }
+
+ /* enable our own CPIs */
+ vic_enable_cpi();
+
+ cpu_set(boot_cpu_id, cpu_online_map);
+ cpu_set(boot_cpu_id, cpu_callout_map);
+
+ /* loop over all the extended VIC CPUs and boot them. The
+ * Quad CPUs must be bootstrapped by their extended VIC cpu */
+ for(i = 0; i < NR_CPUS; i++) {
+ if(i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map))
+ continue;
+ do_boot_cpu(i);
+ /* This udelay seems to be needed for the Quad boots
+ * don't remove unless you know what you're doing */
+ udelay(1000);
+ }
+ /* we could compute the total bogomips here, but why bother?,
+ * Code added from smpboot.c */
+ {
+ unsigned long bogosum = 0;
+ for (i = 0; i < NR_CPUS; i++)
+ if (cpu_isset(i, cpu_online_map))
+ bogosum += cpu_data[i].loops_per_jiffy;
+ printk(KERN_INFO "Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
+ cpucount+1,
+ bogosum/(500000/HZ),
+ (bogosum/(5000/HZ))%100);
+ }
+ voyager_extended_cpus = hweight32(voyager_extended_vic_processors);
+ printk("VOYAGER: Extended (interrupt handling CPUs): %d, non-extended: %d\n", voyager_extended_cpus, num_booting_cpus() - voyager_extended_cpus);
+ /* that's it, switch to symmetric mode */
+ outb(0, VIC_PRIORITY_REGISTER);
+ outb(0, VIC_CLAIM_REGISTER_0);
+ outb(0, VIC_CLAIM_REGISTER_1);
+
+ VDEBUG(("VOYAGER SMP: Booted with %d CPUs\n", num_booting_cpus()));
+}
+
+/* Reload the secondary CPUs task structure (this function does not
+ * return ) */
+void __init
+initialize_secondary(void)
+{
+#if 0
+ // AC kernels only
+ set_current(hard_get_current());
+#endif
+
+ /*
+ * We don't actually need to load the full TSS,
+ * basically just the stack pointer and the eip.
+ */
+
+ asm volatile(
+ "movl %0,%%esp\n\t"
+ "jmp *%1"
+ :
+ :"r" (current->thread.esp),"r" (current->thread.eip));
+}
+
+/* handle a Voyager SYS_INT -- If we don't, the base board will
+ * panic the system.
+ *
+ * System interrupts occur because some problem was detected on the
+ * various busses. To find out what you have to probe all the
+ * hardware via the CAT bus. FIXME: At the moment we do nothing. */
+fastcall void
+smp_vic_sys_interrupt(struct pt_regs *regs)
+{
+ ack_CPI(VIC_SYS_INT);
+ printk("Voyager SYSTEM INTERRUPT\n");
+}
+
+/* Handle a voyager CMN_INT; These interrupts occur either because of
+ * a system status change or because a single bit memory error
+ * occurred. FIXME: At the moment, ignore all this. */
+fastcall void
+smp_vic_cmn_interrupt(struct pt_regs *regs)
+{
+ static __u8 in_cmn_int = 0;
+ static DEFINE_SPINLOCK(cmn_int_lock);
+
+ /* common ints are broadcast, so make sure we only do this once */
+ _raw_spin_lock(&cmn_int_lock);
+ if(in_cmn_int)
+ goto unlock_end;
+
+ in_cmn_int++;
+ _raw_spin_unlock(&cmn_int_lock);
+
+ VDEBUG(("Voyager COMMON INTERRUPT\n"));
+
+ if(voyager_level == 5)
+ voyager_cat_do_common_interrupt();
+
+ _raw_spin_lock(&cmn_int_lock);
+ in_cmn_int = 0;
+ unlock_end:
+ _raw_spin_unlock(&cmn_int_lock);
+ ack_CPI(VIC_CMN_INT);
+}
+
+/*
+ * Reschedule call back. Nothing to do, all the work is done
+ * automatically when we return from the interrupt. */
+static void
+smp_reschedule_interrupt(void)
+{
+ /* do nothing */
+}
+
+static struct mm_struct * flush_mm;
+static unsigned long flush_va;
+static DEFINE_SPINLOCK(tlbstate_lock);
+#define FLUSH_ALL 0xffffffff
+
+/*
+ * We cannot call mmdrop() because we are in interrupt context,
+ * instead update mm->cpu_vm_mask.
+ *
+ * We need to reload %cr3 since the page tables may be going
+ * away from under us..
+ */
+static inline void
+leave_mm (unsigned long cpu)
+{
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
+ BUG();
+ cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
+ load_cr3(swapper_pg_dir);
+}
+
+
+/*
+ * Invalidate call-back
+ */
+static void
+smp_invalidate_interrupt(void)
+{
+ __u8 cpu = smp_processor_id();
+
+ if (!test_bit(cpu, &smp_invalidate_needed))
+ return;
+ /* This will flood messages. Don't uncomment unless you see
+ * Problems with cross cpu invalidation
+ VDEBUG(("VOYAGER SMP: CPU%d received INVALIDATE_CPI\n",
+ smp_processor_id()));
+ */
+
+ if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
+ if (flush_va == FLUSH_ALL)
+ local_flush_tlb();
+ else
+ __flush_tlb_one(flush_va);
+ } else
+ leave_mm(cpu);
+ }
+ smp_mb__before_clear_bit();
+ clear_bit(cpu, &smp_invalidate_needed);
+ smp_mb__after_clear_bit();
+}
+
+/* All the new flush operations for 2.4 */
+
+
+/* This routine is called with a physical cpu mask */
+static void
+voyager_flush_tlb_others (unsigned long cpumask, struct mm_struct *mm,
+ unsigned long va)
+{
+ int stuck = 50000;
+
+ if (!cpumask)
+ BUG();
+ if ((cpumask & cpus_addr(cpu_online_map)[0]) != cpumask)
+ BUG();
+ if (cpumask & (1 << smp_processor_id()))
+ BUG();
+ if (!mm)
+ BUG();
+
+ spin_lock(&tlbstate_lock);
+
+ flush_mm = mm;
+ flush_va = va;
+ atomic_set_mask(cpumask, &smp_invalidate_needed);
+ /*
+ * We have to send the CPI only to
+ * CPUs affected.
+ */
+ send_CPI(cpumask, VIC_INVALIDATE_CPI);
+
+ while (smp_invalidate_needed) {
+ mb();
+ if(--stuck == 0) {
+ printk("***WARNING*** Stuck doing invalidate CPI (CPU%d)\n", smp_processor_id());
+ break;
+ }
+ }
+
+ /* Uncomment only to debug invalidation problems
+ VDEBUG(("VOYAGER SMP: Completed invalidate CPI (CPU%d)\n", cpu));
+ */
+
+ flush_mm = NULL;
+ flush_va = 0;
+ spin_unlock(&tlbstate_lock);
+}
+
+void
+flush_tlb_current_task(void)
+{
+ struct mm_struct *mm = current->mm;
+ unsigned long cpu_mask;
+
+ preempt_disable();
+
+ cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
+ local_flush_tlb();
+ if (cpu_mask)
+ voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
+
+ preempt_enable();
+}
+
+
+void
+flush_tlb_mm (struct mm_struct * mm)
+{
+ unsigned long cpu_mask;
+
+ preempt_disable();
+
+ cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
+
+ if (current->active_mm == mm) {
+ if (current->mm)
+ local_flush_tlb();
+ else
+ leave_mm(smp_processor_id());
+ }
+ if (cpu_mask)
+ voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
+
+ preempt_enable();
+}
+
+void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
+{
+ struct mm_struct *mm = vma->vm_mm;
+ unsigned long cpu_mask;
+
+ preempt_disable();
+
+ cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
+ if (current->active_mm == mm) {
+ if(current->mm)
+ __flush_tlb_one(va);
+ else
+ leave_mm(smp_processor_id());
+ }
+
+ if (cpu_mask)
+ voyager_flush_tlb_others(cpu_mask, mm, va);
+
+ preempt_enable();
+}
+EXPORT_SYMBOL(flush_tlb_page);
+
+/* enable the requested IRQs */
+static void
+smp_enable_irq_interrupt(void)
+{
+ __u8 irq;
+ __u8 cpu = get_cpu();
+
+ VDEBUG(("VOYAGER SMP: CPU%d enabling irq mask 0x%x\n", cpu,
+ vic_irq_enable_mask[cpu]));
+
+ spin_lock(&vic_irq_lock);
+ for(irq = 0; irq < 16; irq++) {
+ if(vic_irq_enable_mask[cpu] & (1<<irq))
+ enable_local_vic_irq(irq);
+ }
+ vic_irq_enable_mask[cpu] = 0;
+ spin_unlock(&vic_irq_lock);
+
+ put_cpu_no_resched();
+}
+
+/*
+ * CPU halt call-back
+ */
+static void
+smp_stop_cpu_function(void *dummy)
+{
+ VDEBUG(("VOYAGER SMP: CPU%d is STOPPING\n", smp_processor_id()));
+ cpu_clear(smp_processor_id(), cpu_online_map);
+ local_irq_disable();
+ for(;;)
+ halt();
+}
+
+static DEFINE_SPINLOCK(call_lock);
+
+struct call_data_struct {
+ void (*func) (void *info);
+ void *info;
+ volatile unsigned long started;
+ volatile unsigned long finished;
+ int wait;
+};
+
+static struct call_data_struct * call_data;
+
+/* execute a thread on a new CPU. The function to be called must be
+ * previously set up. This is used to schedule a function for
+ * execution on all CPU's - set up the function then broadcast a
+ * function_interrupt CPI to come here on each CPU */
+static void
+smp_call_function_interrupt(void)
+{
+ void (*func) (void *info) = call_data->func;
+ void *info = call_data->info;
+ /* must take copy of wait because call_data may be replaced
+ * unless the function is waiting for us to finish */
+ int wait = call_data->wait;
+ __u8 cpu = smp_processor_id();
+
+ /*
+ * Notify initiating CPU that I've grabbed the data and am
+ * about to execute the function
+ */
+ mb();
+ if(!test_and_clear_bit(cpu, &call_data->started)) {
+ /* If the bit wasn't set, this could be a replay */
+ printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion with no call pending\n", cpu);
+ return;
+ }
+ /*
+ * At this point the info structure may be out of scope unless wait==1
+ */
+ irq_enter();
+ (*func)(info);
+ irq_exit();
+ if (wait) {
+ mb();
+ clear_bit(cpu, &call_data->finished);
+ }
+}
+
+static int
+voyager_smp_call_function_mask (cpumask_t cpumask,
+ void (*func) (void *info), void *info,
+ int wait)
+{
+ struct call_data_struct data;
+ u32 mask = cpus_addr(cpumask)[0];
+
+ mask &= ~(1<<smp_processor_id());
+
+ if (!mask)
+ return 0;
+
+ /* Can deadlock when called with interrupts disabled */
+ WARN_ON(irqs_disabled());
+
+ data.func = func;
+ data.info = info;
+ data.started = mask;
+ data.wait = wait;
+ if (wait)
+ data.finished = mask;
+
+ spin_lock(&call_lock);
+ call_data = &data;
+ wmb();
+ /* Send a message to all other CPUs and wait for them to respond */
+ send_CPI(mask, VIC_CALL_FUNCTION_CPI);
+
+ /* Wait for response */
+ while (data.started)
+ barrier();
+
+ if (wait)
+ while (data.finished)
+ barrier();
+
+ spin_unlock(&call_lock);
+
+ return 0;
+}
+
+/* Sorry about the name. In an APIC based system, the APICs
+ * themselves are programmed to send a timer interrupt. This is used
+ * by linux to reschedule the processor. Voyager doesn't have this,
+ * so we use the system clock to interrupt one processor, which in
+ * turn, broadcasts a timer CPI to all the others --- we receive that
+ * CPI here. We don't use this actually for counting so losing
+ * ticks doesn't matter
+ *
+ * FIXME: For those CPU's which actually have a local APIC, we could
+ * try to use it to trigger this interrupt instead of having to
+ * broadcast the timer tick. Unfortunately, all my pentium DYADs have
+ * no local APIC, so I can't do this
+ *
+ * This function is currently a placeholder and is unused in the code */
+fastcall void
+smp_apic_timer_interrupt(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ wrapper_smp_local_timer_interrupt();
+ set_irq_regs(old_regs);
+}
+
+/* All of the QUAD interrupt GATES */
+fastcall void
+smp_qic_timer_interrupt(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ ack_QIC_CPI(QIC_TIMER_CPI);
+ wrapper_smp_local_timer_interrupt();
+ set_irq_regs(old_regs);
+}
+
+fastcall void
+smp_qic_invalidate_interrupt(struct pt_regs *regs)
+{
+ ack_QIC_CPI(QIC_INVALIDATE_CPI);
+ smp_invalidate_interrupt();
+}
+
+fastcall void
+smp_qic_reschedule_interrupt(struct pt_regs *regs)
+{
+ ack_QIC_CPI(QIC_RESCHEDULE_CPI);
+ smp_reschedule_interrupt();
+}
+
+fastcall void
+smp_qic_enable_irq_interrupt(struct pt_regs *regs)
+{
+ ack_QIC_CPI(QIC_ENABLE_IRQ_CPI);
+ smp_enable_irq_interrupt();
+}
+
+fastcall void
+smp_qic_call_function_interrupt(struct pt_regs *regs)
+{
+ ack_QIC_CPI(QIC_CALL_FUNCTION_CPI);
+ smp_call_function_interrupt();
+}
+
+fastcall void
+smp_vic_cpi_interrupt(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ __u8 cpu = smp_processor_id();
+
+ if(is_cpu_quad())
+ ack_QIC_CPI(VIC_CPI_LEVEL0);
+ else
+ ack_VIC_CPI(VIC_CPI_LEVEL0);
+
+ if(test_and_clear_bit(VIC_TIMER_CPI, &vic_cpi_mailbox[cpu]))
+ wrapper_smp_local_timer_interrupt();
+ if(test_and_clear_bit(VIC_INVALIDATE_CPI, &vic_cpi_mailbox[cpu]))
+ smp_invalidate_interrupt();
+ if(test_and_clear_bit(VIC_RESCHEDULE_CPI, &vic_cpi_mailbox[cpu]))
+ smp_reschedule_interrupt();
+ if(test_and_clear_bit(VIC_ENABLE_IRQ_CPI, &vic_cpi_mailbox[cpu]))
+ smp_enable_irq_interrupt();
+ if(test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu]))
+ smp_call_function_interrupt();
+ set_irq_regs(old_regs);
+}
+
+static void
+do_flush_tlb_all(void* info)
+{
+ unsigned long cpu = smp_processor_id();
+
+ __flush_tlb_all();
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY)
+ leave_mm(cpu);
+}
+
+
+/* flush the TLB of every active CPU in the system */
+void
+flush_tlb_all(void)
+{
+ on_each_cpu(do_flush_tlb_all, 0, 1, 1);
+}
+
+/* used to set up the trampoline for other CPUs when the memory manager
+ * is sorted out */
+void __init
+smp_alloc_memory(void)
+{
+ trampoline_base = (__u32)alloc_bootmem_low_pages(PAGE_SIZE);
+ if(__pa(trampoline_base) >= 0x93000)
+ BUG();
+}
+
+/* send a reschedule CPI to one CPU by physical CPU number*/
+static void
+voyager_smp_send_reschedule(int cpu)
+{
+ send_one_CPI(cpu, VIC_RESCHEDULE_CPI);
+}
+
+
+int
+hard_smp_processor_id(void)
+{
+ __u8 i;
+ __u8 cpumask = inb(VIC_PROC_WHO_AM_I);
+ if((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER)
+ return cpumask & 0x1F;
+
+ for(i = 0; i < 8; i++) {
+ if(cpumask & (1<<i))
+ return i;
+ }
+ printk("** WARNING ** Illegal cpuid returned by VIC: %d", cpumask);
+ return 0;
+}
+
+int
+safe_smp_processor_id(void)
+{
+ return hard_smp_processor_id();
+}
+
+/* broadcast a halt to all other CPUs */
+static void
+voyager_smp_send_stop(void)
+{
+ smp_call_function(smp_stop_cpu_function, NULL, 1, 1);
+}
+
+/* this function is triggered in time.c when a clock tick fires
+ * we need to re-broadcast the tick to all CPUs */
+void
+smp_vic_timer_interrupt(void)
+{
+ send_CPI_allbutself(VIC_TIMER_CPI);
+ smp_local_timer_interrupt();
+}
+
+/* local (per CPU) timer interrupt. It does both profiling and
+ * process statistics/rescheduling.
+ *
+ * We do profiling in every local tick, statistics/rescheduling
+ * happen only every 'profiling multiplier' ticks. The default
+ * multiplier is 1 and it can be changed by writing the new multiplier
+ * value into /proc/profile.
+ */
+void
+smp_local_timer_interrupt(void)
+{
+ int cpu = smp_processor_id();
+ long weight;
+
+ profile_tick(CPU_PROFILING);
+ if (--per_cpu(prof_counter, cpu) <= 0) {
+ /*
+ * The multiplier may have changed since the last time we got
+ * to this point as a result of the user writing to
+ * /proc/profile. In this case we need to adjust the APIC
+ * timer accordingly.
+ *
+ * Interrupts are already masked off at this point.
+ */
+ per_cpu(prof_counter,cpu) = per_cpu(prof_multiplier, cpu);
+ if (per_cpu(prof_counter, cpu) !=
+ per_cpu(prof_old_multiplier, cpu)) {
+ /* FIXME: need to update the vic timer tick here */
+ per_cpu(prof_old_multiplier, cpu) =
+ per_cpu(prof_counter, cpu);
+ }
+
+ update_process_times(user_mode_vm(get_irq_regs()));
+ }
+
+ if( ((1<<cpu) & voyager_extended_vic_processors) == 0)
+ /* only extended VIC processors participate in
+ * interrupt distribution */
+ return;
+
+ /*
+ * We take the 'long' return path, and there every subsystem
+ * grabs the apropriate locks (kernel lock/ irq lock).
+ *
+ * we might want to decouple profiling from the 'long path',
+ * and do the profiling totally in assembly.
+ *
+ * Currently this isn't too much of an issue (performance wise),
+ * we can take more than 100K local irqs per second on a 100 MHz P5.
+ */
+
+ if((++vic_tick[cpu] & 0x7) != 0)
+ return;
+ /* get here every 16 ticks (about every 1/6 of a second) */
+
+ /* Change our priority to give someone else a chance at getting
+ * the IRQ. The algorithm goes like this:
+ *
+ * In the VIC, the dynamically routed interrupt is always
+ * handled by the lowest priority eligible (i.e. receiving
+ * interrupts) CPU. If >1 eligible CPUs are equal lowest, the
+ * lowest processor number gets it.
+ *
+ * The priority of a CPU is controlled by a special per-CPU
+ * VIC priority register which is 3 bits wide 0 being lowest
+ * and 7 highest priority..
+ *
+ * Therefore we subtract the average number of interrupts from
+ * the number we've fielded. If this number is negative, we
+ * lower the activity count and if it is positive, we raise
+ * it.
+ *
+ * I'm afraid this still leads to odd looking interrupt counts:
+ * the totals are all roughly equal, but the individual ones
+ * look rather skewed.
+ *
+ * FIXME: This algorithm is total crap when mixed with SMP
+ * affinity code since we now try to even up the interrupt
+ * counts when an affinity binding is keeping them on a
+ * particular CPU*/
+ weight = (vic_intr_count[cpu]*voyager_extended_cpus
+ - vic_intr_total) >> 4;
+ weight += 4;
+ if(weight > 7)
+ weight = 7;
+ if(weight < 0)
+ weight = 0;
+
+ outb((__u8)weight, VIC_PRIORITY_REGISTER);
+
+#ifdef VOYAGER_DEBUG
+ if((vic_tick[cpu] & 0xFFF) == 0) {
+ /* print this message roughly every 25 secs */
+ printk("VOYAGER SMP: vic_tick[%d] = %lu, weight = %ld\n",
+ cpu, vic_tick[cpu], weight);
+ }
+#endif
+}
+
+/* setup the profiling timer */
+int
+setup_profiling_timer(unsigned int multiplier)
+{
+ int i;
+
+ if ( (!multiplier))
+ return -EINVAL;
+
+ /*
+ * Set the new multiplier for each CPU. CPUs don't start using the
+ * new values until the next timer interrupt in which they do process
+ * accounting.
+ */
+ for (i = 0; i < NR_CPUS; ++i)
+ per_cpu(prof_multiplier, i) = multiplier;
+
+ return 0;
+}
+
+/* This is a bit of a mess, but forced on us by the genirq changes
+ * there's no genirq handler that really does what voyager wants
+ * so hack it up with the simple IRQ handler */
+static void fastcall
+handle_vic_irq(unsigned int irq, struct irq_desc *desc)
+{
+ before_handle_vic_irq(irq);
+ handle_simple_irq(irq, desc);
+ after_handle_vic_irq(irq);
+}
+
+
+/* The CPIs are handled in the per cpu 8259s, so they must be
+ * enabled to be received: FIX: enabling the CPIs in the early
+ * boot sequence interferes with bug checking; enable them later
+ * on in smp_init */
+#define VIC_SET_GATE(cpi, vector) \
+ set_intr_gate((cpi) + VIC_DEFAULT_CPI_BASE, (vector))
+#define QIC_SET_GATE(cpi, vector) \
+ set_intr_gate((cpi) + QIC_DEFAULT_CPI_BASE, (vector))
+
+void __init
+smp_intr_init(void)
+{
+ int i;
+
+ /* initialize the per cpu irq mask to all disabled */
+ for(i = 0; i < NR_CPUS; i++)
+ vic_irq_mask[i] = 0xFFFF;
+
+ VIC_SET_GATE(VIC_CPI_LEVEL0, vic_cpi_interrupt);
+
+ VIC_SET_GATE(VIC_SYS_INT, vic_sys_interrupt);
+ VIC_SET_GATE(VIC_CMN_INT, vic_cmn_interrupt);
+
+ QIC_SET_GATE(QIC_TIMER_CPI, qic_timer_interrupt);
+ QIC_SET_GATE(QIC_INVALIDATE_CPI, qic_invalidate_interrupt);
+ QIC_SET_GATE(QIC_RESCHEDULE_CPI, qic_reschedule_interrupt);
+ QIC_SET_GATE(QIC_ENABLE_IRQ_CPI, qic_enable_irq_interrupt);
+ QIC_SET_GATE(QIC_CALL_FUNCTION_CPI, qic_call_function_interrupt);
+
+
+ /* now put the VIC descriptor into the first 48 IRQs
+ *
+ * This is for later: first 16 correspond to PC IRQs; next 16
+ * are Primary MC IRQs and final 16 are Secondary MC IRQs */
+ for(i = 0; i < 48; i++)
+ set_irq_chip_and_handler(i, &vic_chip, handle_vic_irq);
+}
+
+/* send a CPI at level cpi to a set of cpus in cpuset (set 1 bit per
+ * processor to receive CPI */
+static void
+send_CPI(__u32 cpuset, __u8 cpi)
+{
+ int cpu;
+ __u32 quad_cpuset = (cpuset & voyager_quad_processors);
+
+ if(cpi < VIC_START_FAKE_CPI) {
+ /* fake CPI are only used for booting, so send to the
+ * extended quads as well---Quads must be VIC booted */
+ outb((__u8)(cpuset), VIC_CPI_Registers[cpi]);
+ return;
+ }
+ if(quad_cpuset)
+ send_QIC_CPI(quad_cpuset, cpi);
+ cpuset &= ~quad_cpuset;
+ cpuset &= 0xff; /* only first 8 CPUs vaild for VIC CPI */
+ if(cpuset == 0)
+ return;
+ for_each_online_cpu(cpu) {
+ if(cpuset & (1<<cpu))
+ set_bit(cpi, &vic_cpi_mailbox[cpu]);
+ }
+ if(cpuset)
+ outb((__u8)cpuset, VIC_CPI_Registers[VIC_CPI_LEVEL0]);
+}
+
+/* Acknowledge receipt of CPI in the QIC, clear in QIC hardware and
+ * set the cache line to shared by reading it.
+ *
+ * DON'T make this inline otherwise the cache line read will be
+ * optimised away
+ * */
+static int
+ack_QIC_CPI(__u8 cpi) {
+ __u8 cpu = hard_smp_processor_id();
+
+ cpi &= 7;
+
+ outb(1<<cpi, QIC_INTERRUPT_CLEAR1);
+ return voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi;
+}
+
+static void
+ack_special_QIC_CPI(__u8 cpi)
+{
+ switch(cpi) {
+ case VIC_CMN_INT:
+ outb(QIC_CMN_INT, QIC_INTERRUPT_CLEAR0);
+ break;
+ case VIC_SYS_INT:
+ outb(QIC_SYS_INT, QIC_INTERRUPT_CLEAR0);
+ break;
+ }
+ /* also clear at the VIC, just in case (nop for non-extended proc) */
+ ack_VIC_CPI(cpi);
+}
+
+/* Acknowledge receipt of CPI in the VIC (essentially an EOI) */
+static void
+ack_VIC_CPI(__u8 cpi)
+{
+#ifdef VOYAGER_DEBUG
+ unsigned long flags;
+ __u16 isr;
+ __u8 cpu = smp_processor_id();
+
+ local_irq_save(flags);
+ isr = vic_read_isr();
+ if((isr & (1<<(cpi &7))) == 0) {
+ printk("VOYAGER SMP: CPU%d lost CPI%d\n", cpu, cpi);
+ }
+#endif
+ /* send specific EOI; the two system interrupts have
+ * bit 4 set for a separate vector but behave as the
+ * corresponding 3 bit intr */
+ outb_p(0x60|(cpi & 7),0x20);
+
+#ifdef VOYAGER_DEBUG
+ if((vic_read_isr() & (1<<(cpi &7))) != 0) {
+ printk("VOYAGER SMP: CPU%d still asserting CPI%d\n", cpu, cpi);
+ }
+ local_irq_restore(flags);
+#endif
+}
+
+/* cribbed with thanks from irq.c */
+#define __byte(x,y) (((unsigned char *)&(y))[x])
+#define cached_21(cpu) (__byte(0,vic_irq_mask[cpu]))
+#define cached_A1(cpu) (__byte(1,vic_irq_mask[cpu]))
+
+static unsigned int
+startup_vic_irq(unsigned int irq)
+{
+ unmask_vic_irq(irq);
+
+ return 0;
+}
+
+/* The enable and disable routines. This is where we run into
+ * conflicting architectural philosophy. Fundamentally, the voyager
+ * architecture does not expect to have to disable interrupts globally
+ * (the IRQ controllers belong to each CPU). The processor masquerade
+ * which is used to start the system shouldn't be used in a running OS
+ * since it will cause great confusion if two separate CPUs drive to
+ * the same IRQ controller (I know, I've tried it).
+ *
+ * The solution is a variant on the NCR lazy SPL design:
+ *
+ * 1) To disable an interrupt, do nothing (other than set the
+ * IRQ_DISABLED flag). This dares the interrupt actually to arrive.
+ *
+ * 2) If the interrupt dares to come in, raise the local mask against
+ * it (this will result in all the CPU masks being raised
+ * eventually).
+ *
+ * 3) To enable the interrupt, lower the mask on the local CPU and
+ * broadcast an Interrupt enable CPI which causes all other CPUs to
+ * adjust their masks accordingly. */
+
+static void
+unmask_vic_irq(unsigned int irq)
+{
+ /* linux doesn't to processor-irq affinity, so enable on
+ * all CPUs we know about */
+ int cpu = smp_processor_id(), real_cpu;
+ __u16 mask = (1<<irq);
+ __u32 processorList = 0;
+ unsigned long flags;
+
+ VDEBUG(("VOYAGER: unmask_vic_irq(%d) CPU%d affinity 0x%lx\n",
+ irq, cpu, cpu_irq_affinity[cpu]));
+ spin_lock_irqsave(&vic_irq_lock, flags);
+ for_each_online_cpu(real_cpu) {
+ if(!(voyager_extended_vic_processors & (1<<real_cpu)))
+ continue;
+ if(!(cpu_irq_affinity[real_cpu] & mask)) {
+ /* irq has no affinity for this CPU, ignore */
+ continue;
+ }
+ if(real_cpu == cpu) {
+ enable_local_vic_irq(irq);
+ }
+ else if(vic_irq_mask[real_cpu] & mask) {
+ vic_irq_enable_mask[real_cpu] |= mask;
+ processorList |= (1<<real_cpu);
+ }
+ }
+ spin_unlock_irqrestore(&vic_irq_lock, flags);
+ if(processorList)
+ send_CPI(processorList, VIC_ENABLE_IRQ_CPI);
+}
+
+static void
+mask_vic_irq(unsigned int irq)
+{
+ /* lazy disable, do nothing */
+}
+
+static void
+enable_local_vic_irq(unsigned int irq)
+{
+ __u8 cpu = smp_processor_id();
+ __u16 mask = ~(1 << irq);
+ __u16 old_mask = vic_irq_mask[cpu];
+
+ vic_irq_mask[cpu] &= mask;
+ if(vic_irq_mask[cpu] == old_mask)
+ return;
+
+ VDEBUG(("VOYAGER DEBUG: Enabling irq %d in hardware on CPU %d\n",
+ irq, cpu));
+
+ if (irq & 8) {
+ outb_p(cached_A1(cpu),0xA1);
+ (void)inb_p(0xA1);
+ }
+ else {
+ outb_p(cached_21(cpu),0x21);
+ (void)inb_p(0x21);
+ }
+}
+
+static void
+disable_local_vic_irq(unsigned int irq)
+{
+ __u8 cpu = smp_processor_id();
+ __u16 mask = (1 << irq);
+ __u16 old_mask = vic_irq_mask[cpu];
+
+ if(irq == 7)
+ return;
+
+ vic_irq_mask[cpu] |= mask;
+ if(old_mask == vic_irq_mask[cpu])
+ return;
+
+ VDEBUG(("VOYAGER DEBUG: Disabling irq %d in hardware on CPU %d\n",
+ irq, cpu));
+
+ if (irq & 8) {
+ outb_p(cached_A1(cpu),0xA1);
+ (void)inb_p(0xA1);
+ }
+ else {
+ outb_p(cached_21(cpu),0x21);
+ (void)inb_p(0x21);
+ }
+}
+
+/* The VIC is level triggered, so the ack can only be issued after the
+ * interrupt completes. However, we do Voyager lazy interrupt
+ * handling here: It is an extremely expensive operation to mask an
+ * interrupt in the vic, so we merely set a flag (IRQ_DISABLED). If
+ * this interrupt actually comes in, then we mask and ack here to push
+ * the interrupt off to another CPU */
+static void
+before_handle_vic_irq(unsigned int irq)
+{
+ irq_desc_t *desc = irq_desc + irq;
+ __u8 cpu = smp_processor_id();
+
+ _raw_spin_lock(&vic_irq_lock);
+ vic_intr_total++;
+ vic_intr_count[cpu]++;
+
+ if(!(cpu_irq_affinity[cpu] & (1<<irq))) {
+ /* The irq is not in our affinity mask, push it off
+ * onto another CPU */
+ VDEBUG(("VOYAGER DEBUG: affinity triggered disable of irq %d on cpu %d\n",
+ irq, cpu));
+ disable_local_vic_irq(irq);
+ /* set IRQ_INPROGRESS to prevent the handler in irq.c from
+ * actually calling the interrupt routine */
+ desc->status |= IRQ_REPLAY | IRQ_INPROGRESS;
+ } else if(desc->status & IRQ_DISABLED) {
+ /* Damn, the interrupt actually arrived, do the lazy
+ * disable thing. The interrupt routine in irq.c will
+ * not handle a IRQ_DISABLED interrupt, so nothing more
+ * need be done here */
+ VDEBUG(("VOYAGER DEBUG: lazy disable of irq %d on CPU %d\n",
+ irq, cpu));
+ disable_local_vic_irq(irq);
+ desc->status |= IRQ_REPLAY;
+ } else {
+ desc->status &= ~IRQ_REPLAY;
+ }
+
+ _raw_spin_unlock(&vic_irq_lock);
+}
+
+/* Finish the VIC interrupt: basically mask */
+static void
+after_handle_vic_irq(unsigned int irq)
+{
+ irq_desc_t *desc = irq_desc + irq;
+
+ _raw_spin_lock(&vic_irq_lock);
+ {
+ unsigned int status = desc->status & ~IRQ_INPROGRESS;
+#ifdef VOYAGER_DEBUG
+ __u16 isr;
+#endif
+
+ desc->status = status;
+ if ((status & IRQ_DISABLED))
+ disable_local_vic_irq(irq);
+#ifdef VOYAGER_DEBUG
+ /* DEBUG: before we ack, check what's in progress */
+ isr = vic_read_isr();
+ if((isr & (1<<irq) && !(status & IRQ_REPLAY)) == 0) {
+ int i;
+ __u8 cpu = smp_processor_id();
+ __u8 real_cpu;
+ int mask; /* Um... initialize me??? --RR */
+
+ printk("VOYAGER SMP: CPU%d lost interrupt %d\n",
+ cpu, irq);
+ for_each_possible_cpu(real_cpu, mask) {
+
+ outb(VIC_CPU_MASQUERADE_ENABLE | real_cpu,
+ VIC_PROCESSOR_ID);
+ isr = vic_read_isr();
+ if(isr & (1<<irq)) {
+ printk("VOYAGER SMP: CPU%d ack irq %d\n",
+ real_cpu, irq);
+ ack_vic_irq(irq);
+ }
+ outb(cpu, VIC_PROCESSOR_ID);
+ }
+ }
+#endif /* VOYAGER_DEBUG */
+ /* as soon as we ack, the interrupt is eligible for
+ * receipt by another CPU so everything must be in
+ * order here */
+ ack_vic_irq(irq);
+ if(status & IRQ_REPLAY) {
+ /* replay is set if we disable the interrupt
+ * in the before_handle_vic_irq() routine, so
+ * clear the in progress bit here to allow the
+ * next CPU to handle this correctly */
+ desc->status &= ~(IRQ_REPLAY | IRQ_INPROGRESS);
+ }
+#ifdef VOYAGER_DEBUG
+ isr = vic_read_isr();
+ if((isr & (1<<irq)) != 0)
+ printk("VOYAGER SMP: after_handle_vic_irq() after ack irq=%d, isr=0x%x\n",
+ irq, isr);
+#endif /* VOYAGER_DEBUG */
+ }
+ _raw_spin_unlock(&vic_irq_lock);
+
+ /* All code after this point is out of the main path - the IRQ
+ * may be intercepted by another CPU if reasserted */
+}
+
+
+/* Linux processor - interrupt affinity manipulations.
+ *
+ * For each processor, we maintain a 32 bit irq affinity mask.
+ * Initially it is set to all 1's so every processor accepts every
+ * interrupt. In this call, we change the processor's affinity mask:
+ *
+ * Change from enable to disable:
+ *
+ * If the interrupt ever comes in to the processor, we will disable it
+ * and ack it to push it off to another CPU, so just accept the mask here.
+ *
+ * Change from disable to enable:
+ *
+ * change the mask and then do an interrupt enable CPI to re-enable on
+ * the selected processors */
+
+void
+set_vic_irq_affinity(unsigned int irq, cpumask_t mask)
+{
+ /* Only extended processors handle interrupts */
+ unsigned long real_mask;
+ unsigned long irq_mask = 1 << irq;
+ int cpu;
+
+ real_mask = cpus_addr(mask)[0] & voyager_extended_vic_processors;
+
+ if(cpus_addr(mask)[0] == 0)
+ /* can't have no cpu's to accept the interrupt -- extremely
+ * bad things will happen */
+ return;
+
+ if(irq == 0)
+ /* can't change the affinity of the timer IRQ. This
+ * is due to the constraint in the voyager
+ * architecture that the CPI also comes in on and IRQ
+ * line and we have chosen IRQ0 for this. If you
+ * raise the mask on this interrupt, the processor
+ * will no-longer be able to accept VIC CPIs */
+ return;
+
+ if(irq >= 32)
+ /* You can only have 32 interrupts in a voyager system
+ * (and 32 only if you have a secondary microchannel
+ * bus) */
+ return;
+
+ for_each_online_cpu(cpu) {
+ unsigned long cpu_mask = 1 << cpu;
+
+ if(cpu_mask & real_mask) {
+ /* enable the interrupt for this cpu */
+ cpu_irq_affinity[cpu] |= irq_mask;
+ } else {
+ /* disable the interrupt for this cpu */
+ cpu_irq_affinity[cpu] &= ~irq_mask;
+ }
+ }
+ /* this is magic, we now have the correct affinity maps, so
+ * enable the interrupt. This will send an enable CPI to
+ * those cpu's who need to enable it in their local masks,
+ * causing them to correct for the new affinity . If the
+ * interrupt is currently globally disabled, it will simply be
+ * disabled again as it comes in (voyager lazy disable). If
+ * the affinity map is tightened to disable the interrupt on a
+ * cpu, it will be pushed off when it comes in */
+ unmask_vic_irq(irq);
+}
+
+static void
+ack_vic_irq(unsigned int irq)
+{
+ if (irq & 8) {
+ outb(0x62,0x20); /* Specific EOI to cascade */
+ outb(0x60|(irq & 7),0xA0);
+ } else {
+ outb(0x60 | (irq & 7),0x20);
+ }
+}
+
+/* enable the CPIs. In the VIC, the CPIs are delivered by the 8259
+ * but are not vectored by it. This means that the 8259 mask must be
+ * lowered to receive them */
+static __init void
+vic_enable_cpi(void)
+{
+ __u8 cpu = smp_processor_id();
+
+ /* just take a copy of the current mask (nop for boot cpu) */
+ vic_irq_mask[cpu] = vic_irq_mask[boot_cpu_id];
+
+ enable_local_vic_irq(VIC_CPI_LEVEL0);
+ enable_local_vic_irq(VIC_CPI_LEVEL1);
+ /* for sys int and cmn int */
+ enable_local_vic_irq(7);
+
+ if(is_cpu_quad()) {
+ outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0);
+ outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1);
+ VDEBUG(("VOYAGER SMP: QIC ENABLE CPI: CPU%d: MASK 0x%x\n",
+ cpu, QIC_CPI_ENABLE));
+ }
+
+ VDEBUG(("VOYAGER SMP: ENABLE CPI: CPU%d: MASK 0x%x\n",
+ cpu, vic_irq_mask[cpu]));
+}
+
+void
+voyager_smp_dump()
+{
+ int old_cpu = smp_processor_id(), cpu;
+
+ /* dump the interrupt masks of each processor */
+ for_each_online_cpu(cpu) {
+ __u16 imr, isr, irr;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID);
+ imr = (inb(0xa1) << 8) | inb(0x21);
+ outb(0x0a, 0xa0);
+ irr = inb(0xa0) << 8;
+ outb(0x0a, 0x20);
+ irr |= inb(0x20);
+ outb(0x0b, 0xa0);
+ isr = inb(0xa0) << 8;
+ outb(0x0b, 0x20);
+ isr |= inb(0x20);
+ outb(old_cpu, VIC_PROCESSOR_ID);
+ local_irq_restore(flags);
+ printk("\tCPU%d: mask=0x%x, IMR=0x%x, IRR=0x%x, ISR=0x%x\n",
+ cpu, vic_irq_mask[cpu], imr, irr, isr);
+#if 0
+ /* These lines are put in to try to unstick an un ack'd irq */
+ if(isr != 0) {
+ int irq;
+ for(irq=0; irq<16; irq++) {
+ if(isr & (1<<irq)) {
+ printk("\tCPU%d: ack irq %d\n",
+ cpu, irq);
+ local_irq_save(flags);
+ outb(VIC_CPU_MASQUERADE_ENABLE | cpu,
+ VIC_PROCESSOR_ID);
+ ack_vic_irq(irq);
+ outb(old_cpu, VIC_PROCESSOR_ID);
+ local_irq_restore(flags);
+ }
+ }
+ }
+#endif
+ }
+}
+
+void
+smp_voyager_power_off(void *dummy)
+{
+ if(smp_processor_id() == boot_cpu_id)
+ voyager_power_off();
+ else
+ smp_stop_cpu_function(NULL);
+}
+
+static void __init
+voyager_smp_prepare_cpus(unsigned int max_cpus)
+{
+ /* FIXME: ignore max_cpus for now */
+ smp_boot_cpus();
+}
+
+static void __devinit voyager_smp_prepare_boot_cpu(void)
+{
+ init_gdt(smp_processor_id());
+ switch_to_new_gdt();
+
+ cpu_set(smp_processor_id(), cpu_online_map);
+ cpu_set(smp_processor_id(), cpu_callout_map);
+ cpu_set(smp_processor_id(), cpu_possible_map);
+ cpu_set(smp_processor_id(), cpu_present_map);
+}
+
+static int __devinit
+voyager_cpu_up(unsigned int cpu)
+{
+ /* This only works at boot for x86. See "rewrite" above. */
+ if (cpu_isset(cpu, smp_commenced_mask))
+ return -ENOSYS;
+
+ /* In case one didn't come up */
+ if (!cpu_isset(cpu, cpu_callin_map))
+ return -EIO;
+ /* Unleash the CPU! */
+ cpu_set(cpu, smp_commenced_mask);
+ while (!cpu_isset(cpu, cpu_online_map))
+ mb();
+ return 0;
+}
+
+static void __init
+voyager_smp_cpus_done(unsigned int max_cpus)
+{
+ zap_low_mappings();
+}
+
+void __init
+smp_setup_processor_id(void)
+{
+ current_thread_info()->cpu = hard_smp_processor_id();
+ x86_write_percpu(cpu_number, hard_smp_processor_id());
+}
+
+struct smp_ops smp_ops = {
+ .smp_prepare_boot_cpu = voyager_smp_prepare_boot_cpu,
+ .smp_prepare_cpus = voyager_smp_prepare_cpus,
+ .cpu_up = voyager_cpu_up,
+ .smp_cpus_done = voyager_smp_cpus_done,
+
+ .smp_send_stop = voyager_smp_send_stop,
+ .smp_send_reschedule = voyager_smp_send_reschedule,
+ .smp_call_function_mask = voyager_smp_call_function_mask,
+};
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/* Copyright (C) 2001
+ *
+ * Author: J.E.J.Bottomley@HansenPartnership.com
+ *
+ * linux/arch/i386/kernel/voyager_thread.c
+ *
+ * This module provides the machine status monitor thread for the
+ * voyager architecture. This allows us to monitor the machine
+ * environment (temp, voltage, fan function) and the front panel and
+ * internal UPS. If a fault is detected, this thread takes corrective
+ * action (usually just informing init)
+ * */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/mc146818rtc.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <asm/desc.h>
+#include <asm/voyager.h>
+#include <asm/vic.h>
+#include <asm/mtrr.h>
+#include <asm/msr.h>
+
+
+struct task_struct *voyager_thread;
+static __u8 set_timeout;
+
+static int
+execute(const char *string)
+{
+ int ret;
+
+ char *envp[] = {
+ "HOME=/",
+ "TERM=linux",
+ "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
+ NULL,
+ };
+ char *argv[] = {
+ "/bin/bash",
+ "-c",
+ (char *)string,
+ NULL,
+ };
+
+ if ((ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC)) != 0) {
+ printk(KERN_ERR "Voyager failed to run \"%s\": %i\n",
+ string, ret);
+ }
+ return ret;
+}
+
+static void
+check_from_kernel(void)
+{
+ if(voyager_status.switch_off) {
+
+ /* FIXME: This should be configureable via proc */
+ execute("umask 600; echo 0 > /etc/initrunlvl; kill -HUP 1");
+ } else if(voyager_status.power_fail) {
+ VDEBUG(("Voyager daemon detected AC power failure\n"));
+
+ /* FIXME: This should be configureable via proc */
+ execute("umask 600; echo F > /etc/powerstatus; kill -PWR 1");
+ set_timeout = 1;
+ }
+}
+
+static void
+check_continuing_condition(void)
+{
+ if(voyager_status.power_fail) {
+ __u8 data;
+ voyager_cat_psi(VOYAGER_PSI_SUBREAD,
+ VOYAGER_PSI_AC_FAIL_REG, &data);
+ if((data & 0x1f) == 0) {
+ /* all power restored */
+ printk(KERN_NOTICE "VOYAGER AC power restored, cancelling shutdown\n");
+ /* FIXME: should be user configureable */
+ execute("umask 600; echo O > /etc/powerstatus; kill -PWR 1");
+ set_timeout = 0;
+ }
+ }
+}
+
+static int
+thread(void *unused)
+{
+ printk(KERN_NOTICE "Voyager starting monitor thread\n");
+
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(set_timeout ? HZ : MAX_SCHEDULE_TIMEOUT);
+
+ VDEBUG(("Voyager Daemon awoken\n"));
+ if(voyager_status.request_from_kernel == 0) {
+ /* probably awoken from timeout */
+ check_continuing_condition();
+ } else {
+ check_from_kernel();
+ voyager_status.request_from_kernel = 0;
+ }
+ }
+}
+
+static int __init
+voyager_thread_start(void)
+{
+ voyager_thread = kthread_run(thread, NULL, "kvoyagerd");
+ if (IS_ERR(voyager_thread)) {
+ printk(KERN_ERR "Voyager: Failed to create system monitor thread.\n");
+ return PTR_ERR(voyager_thread);
+ }
+ return 0;
+}
+
+
+static void __exit
+voyager_thread_stop(void)
+{
+ kthread_stop(voyager_thread);
+}
+
+module_init(voyager_thread_start);
+module_exit(voyager_thread_stop);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff