+obj-y += interrupt.o iommu.o setup.o spider-pic.o
obj-$(CONFIG_SMP) += smp.o
--- /dev/null
+/*
+ * Cell Internal Interrupt Controller
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/percpu.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/ptrace.h>
+
+#include "interrupt.h"
+
+struct iic_pending_bits {
+ u32 data;
+ u8 flags;
+ u8 class;
+ u8 source;
+ u8 prio;
+};
+
+enum iic_pending_flags {
+ IIC_VALID = 0x80,
+ IIC_IPI = 0x40,
+};
+
+struct iic_regs {
+ struct iic_pending_bits pending;
+ struct iic_pending_bits pending_destr;
+ u64 generate;
+ u64 prio;
+};
+
+struct iic {
+ struct iic_regs __iomem *regs;
+};
+
+static DEFINE_PER_CPU(struct iic, iic);
+
+void iic_local_enable(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
+}
+
+void iic_local_disable(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0x0);
+}
+
+static unsigned int iic_startup(unsigned int irq)
+{
+ return 0;
+}
+
+static void iic_enable(unsigned int irq)
+{
+ iic_local_enable();
+}
+
+static void iic_disable(unsigned int irq)
+{
+}
+
+static void iic_end(unsigned int irq)
+{
+ iic_local_enable();
+}
+
+static struct hw_interrupt_type iic_pic = {
+ .typename = " CELL-IIC ",
+ .startup = iic_startup,
+ .enable = iic_enable,
+ .disable = iic_disable,
+ .end = iic_end,
+};
+
+static int iic_external_get_irq(struct iic_pending_bits pending)
+{
+ int irq;
+ unsigned char node, unit;
+
+ node = pending.source >> 4;
+ unit = pending.source & 0xf;
+ irq = -1;
+
+ /*
+ * This mapping is specific to the Cell Broadband
+ * Engine. We might need to get the numbers
+ * from the device tree to support future CPUs.
+ */
+ switch (unit) {
+ case 0x00:
+ case 0x0b:
+ /*
+ * One of these units can be connected
+ * to an external interrupt controller.
+ */
+ if (pending.prio > 0x3f ||
+ pending.class != 2)
+ break;
+ irq = IIC_EXT_OFFSET
+ + spider_get_irq(pending.prio + node * IIC_NODE_STRIDE)
+ + node * IIC_NODE_STRIDE;
+ break;
+ case 0x01 ... 0x04:
+ case 0x07 ... 0x0a:
+ /*
+ * These units are connected to the SPEs
+ */
+ if (pending.class > 2)
+ break;
+ irq = IIC_SPE_OFFSET
+ + pending.class * IIC_CLASS_STRIDE
+ + node * IIC_NODE_STRIDE
+ + unit;
+ break;
+ }
+ if (irq == -1)
+ printk(KERN_WARNING "Unexpected interrupt class %02x, "
+ "source %02x, prio %02x, cpu %02x\n", pending.class,
+ pending.source, pending.prio, smp_processor_id());
+ return irq;
+}
+
+/* Get an IRQ number from the pending state register of the IIC */
+int iic_get_irq(struct pt_regs *regs)
+{
+ struct iic *iic;
+ int irq;
+ struct iic_pending_bits pending;
+
+ iic = &__get_cpu_var(iic);
+ *(unsigned long *) &pending =
+ in_be64((unsigned long __iomem *) &iic->regs->pending_destr);
+
+ irq = -1;
+ if (pending.flags & IIC_VALID) {
+ if (pending.flags & IIC_IPI) {
+ irq = IIC_IPI_OFFSET + (pending.prio >> 4);
+/*
+ if (irq > 0x80)
+ printk(KERN_WARNING "Unexpected IPI prio %02x"
+ "on CPU %02x\n", pending.prio,
+ smp_processor_id());
+*/
+ } else {
+ irq = iic_external_get_irq(pending);
+ }
+ }
+ return irq;
+}
+
+static struct iic_regs __iomem *find_iic(int cpu)
+{
+ struct device_node *np;
+ int nodeid = cpu / 2;
+ unsigned long regs;
+ struct iic_regs __iomem *iic_regs;
+
+ for (np = of_find_node_by_type(NULL, "cpu");
+ np;
+ np = of_find_node_by_type(np, "cpu")) {
+ if (nodeid == *(int *)get_property(np, "node-id", NULL))
+ break;
+ }
+
+ if (!np) {
+ printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
+ iic_regs = NULL;
+ } else {
+ regs = *(long *)get_property(np, "iic", NULL);
+
+ /* hack until we have decided on the devtree info */
+ regs += 0x400;
+ if (cpu & 1)
+ regs += 0x20;
+
+ printk(KERN_DEBUG "IIC for CPU %d at %lx\n", cpu, regs);
+ iic_regs = __ioremap(regs, sizeof(struct iic_regs),
+ _PAGE_NO_CACHE);
+ }
+ return iic_regs;
+}
+
+#ifdef CONFIG_SMP
+
+/* Use the highest interrupt priorities for IPI */
+static inline int iic_ipi_to_irq(int ipi)
+{
+ return IIC_IPI_OFFSET + IIC_NUM_IPIS - 1 - ipi;
+}
+
+static inline int iic_irq_to_ipi(int irq)
+{
+ return IIC_NUM_IPIS - 1 - (irq - IIC_IPI_OFFSET);
+}
+
+void iic_setup_cpu(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
+}
+
+void iic_cause_IPI(int cpu, int mesg)
+{
+ out_be64(&per_cpu(iic, cpu).regs->generate, (IIC_NUM_IPIS - 1 - mesg) << 4);
+}
+
+static irqreturn_t iic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
+{
+ smp_message_recv(iic_irq_to_ipi(irq), regs);
+ return IRQ_HANDLED;
+}
+
+static void iic_request_ipi(int ipi, const char *name)
+{
+ int irq;
+
+ irq = iic_ipi_to_irq(ipi);
+ /* IPIs are marked SA_INTERRUPT as they must run with irqs
+ * disabled */
+ get_irq_desc(irq)->handler = &iic_pic;
+ get_irq_desc(irq)->status |= IRQ_PER_CPU;
+ request_irq(irq, iic_ipi_action, SA_INTERRUPT, name, NULL);
+}
+
+void iic_request_IPIs(void)
+{
+ iic_request_ipi(PPC_MSG_CALL_FUNCTION, "IPI-call");
+ iic_request_ipi(PPC_MSG_RESCHEDULE, "IPI-resched");
+#ifdef CONFIG_DEBUGGER
+ iic_request_ipi(PPC_MSG_DEBUGGER_BREAK, "IPI-debug");
+#endif /* CONFIG_DEBUGGER */
+}
+#endif /* CONFIG_SMP */
+
+static void iic_setup_spe_handlers(void)
+{
+ int be, isrc;
+
+ /* Assume two threads per BE are present */
+ for (be=0; be < num_present_cpus() / 2; be++) {
+ for (isrc = 0; isrc < IIC_CLASS_STRIDE * 3; isrc++) {
+ int irq = IIC_NODE_STRIDE * be + IIC_SPE_OFFSET + isrc;
+ get_irq_desc(irq)->handler = &iic_pic;
+ }
+ }
+}
+
+void iic_init_IRQ(void)
+{
+ int cpu, irq_offset;
+ struct iic *iic;
+
+ irq_offset = 0;
+ for_each_cpu(cpu) {
+ iic = &per_cpu(iic, cpu);
+ iic->regs = find_iic(cpu);
+ if (iic->regs)
+ out_be64(&iic->regs->prio, 0xff);
+ }
+ iic_setup_spe_handlers();
+}
--- /dev/null
+#ifndef ASM_CELL_PIC_H
+#define ASM_CELL_PIC_H
+#ifdef __KERNEL__
+/*
+ * Mapping of IIC pending bits into per-node
+ * interrupt numbers.
+ *
+ * IRQ FF CC SS PP FF CC SS PP Description
+ *
+ * 00-3f 80 02 +0 00 - 80 02 +0 3f South Bridge
+ * 00-3f 80 02 +b 00 - 80 02 +b 3f South Bridge
+ * 41-4a 80 00 +1 ** - 80 00 +a ** SPU Class 0
+ * 51-5a 80 01 +1 ** - 80 01 +a ** SPU Class 1
+ * 61-6a 80 02 +1 ** - 80 02 +a ** SPU Class 2
+ * 70-7f C0 ** ** 00 - C0 ** ** 0f IPI
+ *
+ * F flags
+ * C class
+ * S source
+ * P Priority
+ * + node number
+ * * don't care
+ *
+ * A node consists of a Cell Broadband Engine and an optional
+ * south bridge device providing a maximum of 64 IRQs.
+ * The south bridge may be connected to either IOIF0
+ * or IOIF1.
+ * Each SPE is represented as three IRQ lines, one per
+ * interrupt class.
+ * 16 IRQ numbers are reserved for inter processor
+ * interruptions, although these are only used in the
+ * range of the first node.
+ *
+ * This scheme needs 128 IRQ numbers per BIF node ID,
+ * which means that with the total of 512 lines
+ * available, we can have a maximum of four nodes.
+ */
+
+enum {
+ IIC_EXT_OFFSET = 0x00, /* Start of south bridge IRQs */
+ IIC_NUM_EXT = 0x40, /* Number of south bridge IRQs */
+ IIC_SPE_OFFSET = 0x40, /* Start of SPE interrupts */
+ IIC_CLASS_STRIDE = 0x10, /* SPE IRQs per class */
+ IIC_IPI_OFFSET = 0x70, /* Start of IPI IRQs */
+ IIC_NUM_IPIS = 0x10, /* IRQs reserved for IPI */
+ IIC_NODE_STRIDE = 0x80, /* Total IRQs per node */
+};
+
+extern void iic_init_IRQ(void);
+extern int iic_get_irq(struct pt_regs *regs);
+extern void iic_cause_IPI(int cpu, int mesg);
+extern void iic_request_IPIs(void);
+extern void iic_setup_cpu(void);
+extern void iic_local_enable(void);
+extern void iic_local_disable(void);
+
+
+extern void spider_init_IRQ(void);
+extern int spider_get_irq(unsigned long int_pending);
+
+#endif
+#endif /* ASM_CELL_PIC_H */
--- /dev/null
+/*
+ * IOMMU implementation for Cell Broadband Processor Architecture
+ * We just establish a linear mapping at boot by setting all the
+ * IOPT cache entries in the CPU.
+ * The mapping functions should be identical to pci_direct_iommu,
+ * except for the handling of the high order bit that is required
+ * by the Spider bridge. These should be split into a separate
+ * file at the point where we get a different bridge chip.
+ *
+ * Copyright (C) 2005 IBM Deutschland Entwicklung GmbH,
+ * Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * Based on linear mapping
+ * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/sections.h>
+#include <asm/iommu.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#include <asm/abs_addr.h>
+#include <asm/system.h>
+#include <asm/ppc-pci.h>
+
+#include "iommu.h"
+
+static inline unsigned long
+get_iopt_entry(unsigned long real_address, unsigned long ioid,
+ unsigned long prot)
+{
+ return (prot & IOPT_PROT_MASK)
+ | (IOPT_COHERENT)
+ | (IOPT_ORDER_VC)
+ | (real_address & IOPT_RPN_MASK)
+ | (ioid & IOPT_IOID_MASK);
+}
+
+typedef struct {
+ unsigned long val;
+} ioste;
+
+static inline ioste
+mk_ioste(unsigned long val)
+{
+ ioste ioste = { .val = val, };
+ return ioste;
+}
+
+static inline ioste
+get_iost_entry(unsigned long iopt_base, unsigned long io_address, unsigned page_size)
+{
+ unsigned long ps;
+ unsigned long iostep;
+ unsigned long nnpt;
+ unsigned long shift;
+
+ switch (page_size) {
+ case 0x1000000:
+ ps = IOST_PS_16M;
+ nnpt = 0; /* one page per segment */
+ shift = 5; /* segment has 16 iopt entries */
+ break;
+
+ case 0x100000:
+ ps = IOST_PS_1M;
+ nnpt = 0; /* one page per segment */
+ shift = 1; /* segment has 256 iopt entries */
+ break;
+
+ case 0x10000:
+ ps = IOST_PS_64K;
+ nnpt = 0x07; /* 8 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ case 0x1000:
+ ps = IOST_PS_4K;
+ nnpt = 0x7f; /* 128 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ default: /* not a known compile time constant */
+ {
+ /* BUILD_BUG_ON() is not usable here */
+ extern void __get_iost_entry_bad_page_size(void);
+ __get_iost_entry_bad_page_size();
+ }
+ break;
+ }
+
+ iostep = iopt_base +
+ /* need 8 bytes per iopte */
+ (((io_address / page_size * 8)
+ /* align io page tables on 4k page boundaries */
+ << shift)
+ /* nnpt+1 pages go into each iopt */
+ & ~(nnpt << 12));
+
+ nnpt++; /* this seems to work, but the documentation is not clear
+ about wether we put nnpt or nnpt-1 into the ioste bits.
+ In theory, this can't work for 4k pages. */
+ return mk_ioste(IOST_VALID_MASK
+ | (iostep & IOST_PT_BASE_MASK)
+ | ((nnpt << 5) & IOST_NNPT_MASK)
+ | (ps & IOST_PS_MASK));
+}
+
+/* compute the address of an io pte */
+static inline unsigned long
+get_ioptep(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopt_base;
+ unsigned long page_size;
+ unsigned long page_number;
+ unsigned long iopt_offset;
+
+ iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
+ page_size = iost_entry.val & IOST_PS_MASK;
+
+ /* decode page size to compute page number */
+ page_number = (io_address & 0x0fffffff) >> (10 + 2 * page_size);
+ /* page number is an offset into the io page table */
+ iopt_offset = (page_number << 3) & 0x7fff8ul;
+ return iopt_base + iopt_offset;
+}
+
+/* compute the tag field of the iopt cache entry */
+static inline unsigned long
+get_ioc_tag(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return IOPT_VALID_MASK
+ | ((iopte & 0x00000000000000ff8ul) >> 3)
+ | ((iopte & 0x0000003fffffc0000ul) >> 9);
+}
+
+/* compute the hashed 6 bit index for the 4-way associative pte cache */
+static inline unsigned long
+get_ioc_hash(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7);
+}
+
+/* same as above, but pretend that we have a simpler 1-way associative
+ pte cache with an 8 bit index */
+static inline unsigned long
+get_ioc_hash_1way(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7)
+ ^ ((iopte & 0x0000000000000c000ul) >> 8);
+}
+
+static inline ioste
+get_iost_cache(void __iomem *base, unsigned long index)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ return mk_ioste(in_be64(&p[index]));
+}
+
+static inline void
+set_iost_cache(void __iomem *base, unsigned long index, ioste ste)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ pr_debug("ioste %02lx was %016lx, store %016lx", index,
+ get_iost_cache(base, index).val, ste.val);
+ out_be64(&p[index], ste.val);
+ pr_debug(" now %016lx\n", get_iost_cache(base, index).val);
+}
+
+static inline unsigned long
+get_iopt_cache(void __iomem *base, unsigned long index, unsigned long *tag)
+{
+ unsigned long __iomem *tags = (void *)(base + IOC_PT_CACHE_DIR);
+ unsigned long __iomem *p = (void *)(base + IOC_PT_CACHE_REG);
+
+ *tag = tags[index];
+ rmb();
+ return *p;
+}
+
+static inline void
+set_iopt_cache(void __iomem *base, unsigned long index,
+ unsigned long tag, unsigned long val)
+{
+ unsigned long __iomem *tags = base + IOC_PT_CACHE_DIR;
+ unsigned long __iomem *p = base + IOC_PT_CACHE_REG;
+ pr_debug("iopt %02lx was v%016lx/t%016lx, store v%016lx/t%016lx\n",
+ index, get_iopt_cache(base, index, &oldtag), oldtag, val, tag);
+
+ out_be64(p, val);
+ out_be64(&tags[index], tag);
+}
+
+static inline void
+set_iost_origin(void __iomem *base)
+{
+ unsigned long __iomem *p = base + IOC_ST_ORIGIN;
+ unsigned long origin = IOSTO_ENABLE | IOSTO_SW;
+
+ pr_debug("iost_origin %016lx, now %016lx\n", in_be64(p), origin);
+ out_be64(p, origin);
+}
+
+static inline void
+set_iocmd_config(void __iomem *base)
+{
+ unsigned long __iomem *p = base + 0xc00;
+ unsigned long conf;
+
+ conf = in_be64(p);
+ pr_debug("iost_conf %016lx, now %016lx\n", conf, conf | IOCMD_CONF_TE);
+ out_be64(p, conf | IOCMD_CONF_TE);
+}
+
+/* FIXME: get these from the device tree */
+#define ioc_base 0x20000511000ull
+#define ioc_mmio_base 0x20000510000ull
+#define ioid 0x48a
+#define iopt_phys_offset (- 0x20000000) /* We have a 512MB offset from the SB */
+#define io_page_size 0x1000000
+
+static unsigned long map_iopt_entry(unsigned long address)
+{
+ switch (address >> 20) {
+ case 0x600:
+ address = 0x24020000000ull; /* spider i/o */
+ break;
+ default:
+ address += iopt_phys_offset;
+ break;
+ }
+
+ return get_iopt_entry(address, ioid, IOPT_PROT_RW);
+}
+
+static void iommu_bus_setup_null(struct pci_bus *b) { }
+static void iommu_dev_setup_null(struct pci_dev *d) { }
+
+/* initialize the iommu to support a simple linear mapping
+ * for each DMA window used by any device. For now, we
+ * happen to know that there is only one DMA window in use,
+ * starting at iopt_phys_offset. */
+static void cell_map_iommu(void)
+{
+ unsigned long address;
+ void __iomem *base;
+ ioste ioste;
+ unsigned long index;
+
+ base = __ioremap(ioc_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_base, base);
+ set_iocmd_config(base);
+ iounmap(base);
+
+ base = __ioremap(ioc_mmio_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_mmio_base, base);
+
+ set_iost_origin(base);
+
+ for (address = 0; address < 0x100000000ul; address += io_page_size) {
+ ioste = get_iost_entry(0x10000000000ul, address, io_page_size);
+ if ((address & 0xfffffff) == 0) /* segment start */
+ set_iost_cache(base, address >> 28, ioste);
+ index = get_ioc_hash_1way(ioste, address);
+ pr_debug("addr %08lx, index %02lx, ioste %016lx\n",
+ address, index, ioste.val);
+ set_iopt_cache(base,
+ get_ioc_hash_1way(ioste, address),
+ get_ioc_tag(ioste, address),
+ map_iopt_entry(address));
+ }
+ iounmap(base);
+}
+
+
+static void *cell_alloc_coherent(struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag)
+{
+ void *ret;
+
+ ret = (void *)__get_free_pages(flag, get_order(size));
+ if (ret != NULL) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_abs(ret) | CELL_DMA_VALID;
+ }
+ return ret;
+}
+
+static void cell_free_coherent(struct device *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ free_pages((unsigned long)vaddr, get_order(size));
+}
+
+static dma_addr_t cell_map_single(struct device *hwdev, void *ptr,
+ size_t size, enum dma_data_direction direction)
+{
+ return virt_to_abs(ptr) | CELL_DMA_VALID;
+}
+
+static void cell_unmap_single(struct device *hwdev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction direction)
+{
+}
+
+static int cell_map_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+ int i;
+
+ for (i = 0; i < nents; i++, sg++) {
+ sg->dma_address = (page_to_phys(sg->page) + sg->offset)
+ | CELL_DMA_VALID;
+ sg->dma_length = sg->length;
+ }
+
+ return nents;
+}
+
+static void cell_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+}
+
+static int cell_dma_supported(struct device *dev, u64 mask)
+{
+ return mask < 0x100000000ull;
+}
+
+void cell_init_iommu(void)
+{
+ cell_map_iommu();
+
+ /* Direct I/O, IOMMU off */
+ ppc_md.iommu_dev_setup = iommu_dev_setup_null;
+ ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+
+ pci_dma_ops.alloc_coherent = cell_alloc_coherent;
+ pci_dma_ops.free_coherent = cell_free_coherent;
+ pci_dma_ops.map_single = cell_map_single;
+ pci_dma_ops.unmap_single = cell_unmap_single;
+ pci_dma_ops.map_sg = cell_map_sg;
+ pci_dma_ops.unmap_sg = cell_unmap_sg;
+ pci_dma_ops.dma_supported = cell_dma_supported;
+}
--- /dev/null
+#ifndef CELL_IOMMU_H
+#define CELL_IOMMU_H
+
+/* some constants */
+enum {
+ /* segment table entries */
+ IOST_VALID_MASK = 0x8000000000000000ul,
+ IOST_TAG_MASK = 0x3000000000000000ul,
+ IOST_PT_BASE_MASK = 0x000003fffffff000ul,
+ IOST_NNPT_MASK = 0x0000000000000fe0ul,
+ IOST_PS_MASK = 0x000000000000000ful,
+
+ IOST_PS_4K = 0x1,
+ IOST_PS_64K = 0x3,
+ IOST_PS_1M = 0x5,
+ IOST_PS_16M = 0x7,
+
+ /* iopt tag register */
+ IOPT_VALID_MASK = 0x0000000200000000ul,
+ IOPT_TAG_MASK = 0x00000001fffffffful,
+
+ /* iopt cache register */
+ IOPT_PROT_MASK = 0xc000000000000000ul,
+ IOPT_PROT_NONE = 0x0000000000000000ul,
+ IOPT_PROT_READ = 0x4000000000000000ul,
+ IOPT_PROT_WRITE = 0x8000000000000000ul,
+ IOPT_PROT_RW = 0xc000000000000000ul,
+ IOPT_COHERENT = 0x2000000000000000ul,
+
+ IOPT_ORDER_MASK = 0x1800000000000000ul,
+ /* order access to same IOID/VC on same address */
+ IOPT_ORDER_ADDR = 0x0800000000000000ul,
+ /* similar, but only after a write access */
+ IOPT_ORDER_WRITES = 0x1000000000000000ul,
+ /* Order all accesses to same IOID/VC */
+ IOPT_ORDER_VC = 0x1800000000000000ul,
+
+ IOPT_RPN_MASK = 0x000003fffffff000ul,
+ IOPT_HINT_MASK = 0x0000000000000800ul,
+ IOPT_IOID_MASK = 0x00000000000007fful,
+
+ IOSTO_ENABLE = 0x8000000000000000ul,
+ IOSTO_ORIGIN = 0x000003fffffff000ul,
+ IOSTO_HW = 0x0000000000000800ul,
+ IOSTO_SW = 0x0000000000000400ul,
+
+ IOCMD_CONF_TE = 0x0000800000000000ul,
+
+ /* memory mapped registers */
+ IOC_PT_CACHE_DIR = 0x000,
+ IOC_ST_CACHE_DIR = 0x800,
+ IOC_PT_CACHE_REG = 0x910,
+ IOC_ST_ORIGIN = 0x918,
+ IOC_CONF = 0x930,
+
+ /* The high bit needs to be set on every DMA address,
+ only 2GB are addressable */
+ CELL_DMA_VALID = 0x80000000,
+ CELL_DMA_MASK = 0x7fffffff,
+};
+
+
+void cell_init_iommu(void);
+
+#endif
--- /dev/null
+/*
+ * linux/arch/powerpc/platforms/cell/cell_setup.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * Modified by PPC64 Team, IBM Corp
+ * Modified by Cell Team, IBM Deutschland Entwicklung GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/console.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/nvram.h>
+#include <asm/cputable.h>
+#include <asm/ppc-pci.h>
+#include <asm/irq.h>
+
+#include "interrupt.h"
+#include "iommu.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+void cell_show_cpuinfo(struct seq_file *m)
+{
+ struct device_node *root;
+ const char *model = "";
+
+ root = of_find_node_by_path("/");
+ if (root)
+ model = get_property(root, "model", NULL);
+ seq_printf(m, "machine\t\t: CHRP %s\n", model);
+ of_node_put(root);
+}
+
+static void cell_progress(char *s, unsigned short hex)
+{
+ printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+static void __init cell_setup_arch(void)
+{
+ ppc_md.init_IRQ = iic_init_IRQ;
+ ppc_md.get_irq = iic_get_irq;
+
+#ifdef CONFIG_SMP
+ smp_init_cell();
+#endif
+
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000;
+
+ if (ROOT_DEV == 0) {
+ printk("No ramdisk, default root is /dev/hda2\n");
+ ROOT_DEV = Root_HDA2;
+ }
+
+ /* Find and initialize PCI host bridges */
+ init_pci_config_tokens();
+ find_and_init_phbs();
+ spider_init_IRQ();
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ mmio_nvram_init();
+}
+
+/*
+ * Early initialization. Relocation is on but do not reference unbolted pages
+ */
+static void __init cell_init_early(void)
+{
+ DBG(" -> cell_init_early()\n");
+
+ hpte_init_native();
+
+ cell_init_iommu();
+
+ ppc64_interrupt_controller = IC_CELL_PIC;
+
+ DBG(" <- cell_init_early()\n");
+}
+
+
+static int __init cell_probe(int platform)
+{
+ if (platform != PLATFORM_CELL)
+ return 0;
+
+ return 1;
+}
+
+struct machdep_calls __initdata cell_md = {
+ .probe = cell_probe,
+ .setup_arch = cell_setup_arch,
+ .init_early = cell_init_early,
+ .show_cpuinfo = cell_show_cpuinfo,
+ .restart = rtas_restart,
+ .power_off = rtas_power_off,
+ .halt = rtas_halt,
+ .get_boot_time = rtas_get_boot_time,
+ .get_rtc_time = rtas_get_rtc_time,
+ .set_rtc_time = rtas_set_rtc_time,
+ .calibrate_decr = generic_calibrate_decr,
+ .progress = cell_progress,
+};
--- /dev/null
+/*
+ * External Interrupt Controller on Spider South Bridge
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/io.h>
+
+#include "interrupt.h"
+
+/* register layout taken from Spider spec, table 7.4-4 */
+enum {
+ TIR_DEN = 0x004, /* Detection Enable Register */
+ TIR_MSK = 0x084, /* Mask Level Register */
+ TIR_EDC = 0x0c0, /* Edge Detection Clear Register */
+ TIR_PNDA = 0x100, /* Pending Register A */
+ TIR_PNDB = 0x104, /* Pending Register B */
+ TIR_CS = 0x144, /* Current Status Register */
+ TIR_LCSA = 0x150, /* Level Current Status Register A */
+ TIR_LCSB = 0x154, /* Level Current Status Register B */
+ TIR_LCSC = 0x158, /* Level Current Status Register C */
+ TIR_LCSD = 0x15c, /* Level Current Status Register D */
+ TIR_CFGA = 0x200, /* Setting Register A0 */
+ TIR_CFGB = 0x204, /* Setting Register B0 */
+ /* 0x208 ... 0x3ff Setting Register An/Bn */
+ TIR_PPNDA = 0x400, /* Packet Pending Register A */
+ TIR_PPNDB = 0x404, /* Packet Pending Register B */
+ TIR_PIERA = 0x408, /* Packet Output Error Register A */
+ TIR_PIERB = 0x40c, /* Packet Output Error Register B */
+ TIR_PIEN = 0x444, /* Packet Output Enable Register */
+ TIR_PIPND = 0x454, /* Packet Output Pending Register */
+ TIRDID = 0x484, /* Spider Device ID Register */
+ REISTIM = 0x500, /* Reissue Command Timeout Time Setting */
+ REISTIMEN = 0x504, /* Reissue Command Timeout Setting */
+ REISWAITEN = 0x508, /* Reissue Wait Control*/
+};
+
+static void __iomem *spider_pics[4];
+
+static void __iomem *spider_get_pic(int irq)
+{
+ int node = irq / IIC_NODE_STRIDE;
+ irq %= IIC_NODE_STRIDE;
+
+ if (irq >= IIC_EXT_OFFSET &&
+ irq < IIC_EXT_OFFSET + IIC_NUM_EXT &&
+ spider_pics)
+ return spider_pics[node];
+ return NULL;
+}
+
+static int spider_get_nr(unsigned int irq)
+{
+ return (irq % IIC_NODE_STRIDE) - IIC_EXT_OFFSET;
+}
+
+static void __iomem *spider_get_irq_config(int irq)
+{
+ void __iomem *pic;
+ pic = spider_get_pic(irq);
+ return pic + TIR_CFGA + 8 * spider_get_nr(irq);
+}
+
+static void spider_enable_irq(unsigned int irq)
+{
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
+
+ out_be32(cfg, in_be32(cfg) | 0x3107000eu);
+ out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
+}
+
+static void spider_disable_irq(unsigned int irq)
+{
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
+
+ out_be32(cfg, in_be32(cfg) & ~0x30000000u);
+}
+
+static unsigned int spider_startup_irq(unsigned int irq)
+{
+ spider_enable_irq(irq);
+ return 0;
+}
+
+static void spider_shutdown_irq(unsigned int irq)
+{
+ spider_disable_irq(irq);
+}
+
+static void spider_end_irq(unsigned int irq)
+{
+ spider_enable_irq(irq);
+}
+
+static void spider_ack_irq(unsigned int irq)
+{
+ spider_disable_irq(irq);
+ iic_local_enable();
+}
+
+static struct hw_interrupt_type spider_pic = {
+ .typename = " SPIDER ",
+ .startup = spider_startup_irq,
+ .shutdown = spider_shutdown_irq,
+ .enable = spider_enable_irq,
+ .disable = spider_disable_irq,
+ .ack = spider_ack_irq,
+ .end = spider_end_irq,
+};
+
+
+int spider_get_irq(unsigned long int_pending)
+{
+ void __iomem *regs = spider_get_pic(int_pending);
+ unsigned long cs;
+ int irq;
+
+ cs = in_be32(regs + TIR_CS);
+
+ irq = cs >> 24;
+ if (irq != 63)
+ return irq;
+
+ return -1;
+}
+
+void spider_init_IRQ(void)
+{
+ int node;
+ struct device_node *dn;
+ unsigned int *property;
+ long spiderpic;
+ int n;
+
+/* FIXME: detect multiple PICs as soon as the device tree has them */
+ for (node = 0; node < 1; node++) {
+ dn = of_find_node_by_path("/");
+ n = prom_n_addr_cells(dn);
+ property = (unsigned int *) get_property(dn,
+ "platform-spider-pic", NULL);
+
+ if (!property)
+ continue;
+ for (spiderpic = 0; n > 0; --n)
+ spiderpic = (spiderpic << 32) + *property++;
+ printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
+ spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
+ for (n = 0; n < IIC_NUM_EXT; n++) {
+ int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
+ get_irq_desc(irq)->handler = &spider_pic;
+
+ /* do not mask any interrupts because of level */
+ out_be32(spider_pics[node] + TIR_MSK, 0x0);
+
+ /* disable edge detection clear */
+ /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
+
+ /* enable interrupt packets to be output */
+ out_be32(spider_pics[node] + TIR_PIEN,
+ in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
+
+ /* Enable the interrupt detection enable bit. Do this last! */
+ out_be32(spider_pics[node] + TIR_DEN,
+ in_be32(spider_pics[node] +TIR_DEN) | 0x1);
+
+ }
+ }
+}
obj-$(CONFIG_PPC_PSERIES) += rtasd.o udbg_16550.o
-obj-$(CONFIG_PPC_CELL) += bpa_setup.o bpa_iommu.o \
- bpa_iic.o spider-pic.o
-
obj-$(CONFIG_KEXEC) += machine_kexec.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
+++ /dev/null
-/*
- * Cell Internal Interrupt Controller
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
- *
- * Author: Arnd Bergmann <arndb@de.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/config.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/percpu.h>
-#include <linux/types.h>
-
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/prom.h>
-#include <asm/ptrace.h>
-
-#include "interrupt.h"
-
-struct iic_pending_bits {
- u32 data;
- u8 flags;
- u8 class;
- u8 source;
- u8 prio;
-};
-
-enum iic_pending_flags {
- IIC_VALID = 0x80,
- IIC_IPI = 0x40,
-};
-
-struct iic_regs {
- struct iic_pending_bits pending;
- struct iic_pending_bits pending_destr;
- u64 generate;
- u64 prio;
-};
-
-struct iic {
- struct iic_regs __iomem *regs;
-};
-
-static DEFINE_PER_CPU(struct iic, iic);
-
-void iic_local_enable(void)
-{
- out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
-}
-
-void iic_local_disable(void)
-{
- out_be64(&__get_cpu_var(iic).regs->prio, 0x0);
-}
-
-static unsigned int iic_startup(unsigned int irq)
-{
- return 0;
-}
-
-static void iic_enable(unsigned int irq)
-{
- iic_local_enable();
-}
-
-static void iic_disable(unsigned int irq)
-{
-}
-
-static void iic_end(unsigned int irq)
-{
- iic_local_enable();
-}
-
-static struct hw_interrupt_type iic_pic = {
- .typename = " CELL-IIC ",
- .startup = iic_startup,
- .enable = iic_enable,
- .disable = iic_disable,
- .end = iic_end,
-};
-
-static int iic_external_get_irq(struct iic_pending_bits pending)
-{
- int irq;
- unsigned char node, unit;
-
- node = pending.source >> 4;
- unit = pending.source & 0xf;
- irq = -1;
-
- /*
- * This mapping is specific to the Cell Broadband
- * Engine. We might need to get the numbers
- * from the device tree to support future CPUs.
- */
- switch (unit) {
- case 0x00:
- case 0x0b:
- /*
- * One of these units can be connected
- * to an external interrupt controller.
- */
- if (pending.prio > 0x3f ||
- pending.class != 2)
- break;
- irq = IIC_EXT_OFFSET
- + spider_get_irq(pending.prio + node * IIC_NODE_STRIDE)
- + node * IIC_NODE_STRIDE;
- break;
- case 0x01 ... 0x04:
- case 0x07 ... 0x0a:
- /*
- * These units are connected to the SPEs
- */
- if (pending.class > 2)
- break;
- irq = IIC_SPE_OFFSET
- + pending.class * IIC_CLASS_STRIDE
- + node * IIC_NODE_STRIDE
- + unit;
- break;
- }
- if (irq == -1)
- printk(KERN_WARNING "Unexpected interrupt class %02x, "
- "source %02x, prio %02x, cpu %02x\n", pending.class,
- pending.source, pending.prio, smp_processor_id());
- return irq;
-}
-
-/* Get an IRQ number from the pending state register of the IIC */
-int iic_get_irq(struct pt_regs *regs)
-{
- struct iic *iic;
- int irq;
- struct iic_pending_bits pending;
-
- iic = &__get_cpu_var(iic);
- *(unsigned long *) &pending =
- in_be64((unsigned long __iomem *) &iic->regs->pending_destr);
-
- irq = -1;
- if (pending.flags & IIC_VALID) {
- if (pending.flags & IIC_IPI) {
- irq = IIC_IPI_OFFSET + (pending.prio >> 4);
-/*
- if (irq > 0x80)
- printk(KERN_WARNING "Unexpected IPI prio %02x"
- "on CPU %02x\n", pending.prio,
- smp_processor_id());
-*/
- } else {
- irq = iic_external_get_irq(pending);
- }
- }
- return irq;
-}
-
-static struct iic_regs __iomem *find_iic(int cpu)
-{
- struct device_node *np;
- int nodeid = cpu / 2;
- unsigned long regs;
- struct iic_regs __iomem *iic_regs;
-
- for (np = of_find_node_by_type(NULL, "cpu");
- np;
- np = of_find_node_by_type(np, "cpu")) {
- if (nodeid == *(int *)get_property(np, "node-id", NULL))
- break;
- }
-
- if (!np) {
- printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
- iic_regs = NULL;
- } else {
- regs = *(long *)get_property(np, "iic", NULL);
-
- /* hack until we have decided on the devtree info */
- regs += 0x400;
- if (cpu & 1)
- regs += 0x20;
-
- printk(KERN_DEBUG "IIC for CPU %d at %lx\n", cpu, regs);
- iic_regs = __ioremap(regs, sizeof(struct iic_regs),
- _PAGE_NO_CACHE);
- }
- return iic_regs;
-}
-
-#ifdef CONFIG_SMP
-
-/* Use the highest interrupt priorities for IPI */
-static inline int iic_ipi_to_irq(int ipi)
-{
- return IIC_IPI_OFFSET + IIC_NUM_IPIS - 1 - ipi;
-}
-
-static inline int iic_irq_to_ipi(int irq)
-{
- return IIC_NUM_IPIS - 1 - (irq - IIC_IPI_OFFSET);
-}
-
-void iic_setup_cpu(void)
-{
- out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
-}
-
-void iic_cause_IPI(int cpu, int mesg)
-{
- out_be64(&per_cpu(iic, cpu).regs->generate, (IIC_NUM_IPIS - 1 - mesg) << 4);
-}
-
-static irqreturn_t iic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
-{
- smp_message_recv(iic_irq_to_ipi(irq), regs);
- return IRQ_HANDLED;
-}
-
-static void iic_request_ipi(int ipi, const char *name)
-{
- int irq;
-
- irq = iic_ipi_to_irq(ipi);
- /* IPIs are marked SA_INTERRUPT as they must run with irqs
- * disabled */
- get_irq_desc(irq)->handler = &iic_pic;
- get_irq_desc(irq)->status |= IRQ_PER_CPU;
- request_irq(irq, iic_ipi_action, SA_INTERRUPT, name, NULL);
-}
-
-void iic_request_IPIs(void)
-{
- iic_request_ipi(PPC_MSG_CALL_FUNCTION, "IPI-call");
- iic_request_ipi(PPC_MSG_RESCHEDULE, "IPI-resched");
-#ifdef CONFIG_DEBUGGER
- iic_request_ipi(PPC_MSG_DEBUGGER_BREAK, "IPI-debug");
-#endif /* CONFIG_DEBUGGER */
-}
-#endif /* CONFIG_SMP */
-
-static void iic_setup_spe_handlers(void)
-{
- int be, isrc;
-
- /* Assume two threads per BE are present */
- for (be=0; be < num_present_cpus() / 2; be++) {
- for (isrc = 0; isrc < IIC_CLASS_STRIDE * 3; isrc++) {
- int irq = IIC_NODE_STRIDE * be + IIC_SPE_OFFSET + isrc;
- get_irq_desc(irq)->handler = &iic_pic;
- }
- }
-}
-
-void iic_init_IRQ(void)
-{
- int cpu, irq_offset;
- struct iic *iic;
-
- irq_offset = 0;
- for_each_cpu(cpu) {
- iic = &per_cpu(iic, cpu);
- iic->regs = find_iic(cpu);
- if (iic->regs)
- out_be64(&iic->regs->prio, 0xff);
- }
- iic_setup_spe_handlers();
-}
+++ /dev/null
-#ifndef ASM_CELL_PIC_H
-#define ASM_CELL_PIC_H
-#ifdef __KERNEL__
-/*
- * Mapping of IIC pending bits into per-node
- * interrupt numbers.
- *
- * IRQ FF CC SS PP FF CC SS PP Description
- *
- * 00-3f 80 02 +0 00 - 80 02 +0 3f South Bridge
- * 00-3f 80 02 +b 00 - 80 02 +b 3f South Bridge
- * 41-4a 80 00 +1 ** - 80 00 +a ** SPU Class 0
- * 51-5a 80 01 +1 ** - 80 01 +a ** SPU Class 1
- * 61-6a 80 02 +1 ** - 80 02 +a ** SPU Class 2
- * 70-7f C0 ** ** 00 - C0 ** ** 0f IPI
- *
- * F flags
- * C class
- * S source
- * P Priority
- * + node number
- * * don't care
- *
- * A node consists of a Cell Broadband Engine and an optional
- * south bridge device providing a maximum of 64 IRQs.
- * The south bridge may be connected to either IOIF0
- * or IOIF1.
- * Each SPE is represented as three IRQ lines, one per
- * interrupt class.
- * 16 IRQ numbers are reserved for inter processor
- * interruptions, although these are only used in the
- * range of the first node.
- *
- * This scheme needs 128 IRQ numbers per BIF node ID,
- * which means that with the total of 512 lines
- * available, we can have a maximum of four nodes.
- */
-
-enum {
- IIC_EXT_OFFSET = 0x00, /* Start of south bridge IRQs */
- IIC_NUM_EXT = 0x40, /* Number of south bridge IRQs */
- IIC_SPE_OFFSET = 0x40, /* Start of SPE interrupts */
- IIC_CLASS_STRIDE = 0x10, /* SPE IRQs per class */
- IIC_IPI_OFFSET = 0x70, /* Start of IPI IRQs */
- IIC_NUM_IPIS = 0x10, /* IRQs reserved for IPI */
- IIC_NODE_STRIDE = 0x80, /* Total IRQs per node */
-};
-
-extern void iic_init_IRQ(void);
-extern int iic_get_irq(struct pt_regs *regs);
-extern void iic_cause_IPI(int cpu, int mesg);
-extern void iic_request_IPIs(void);
-extern void iic_setup_cpu(void);
-extern void iic_local_enable(void);
-extern void iic_local_disable(void);
-
-
-extern void spider_init_IRQ(void);
-extern int spider_get_irq(unsigned long int_pending);
-
-#endif
-#endif /* ASM_CELL_PIC_H */
+++ /dev/null
-/*
- * IOMMU implementation for Cell Broadband Processor Architecture
- * We just establish a linear mapping at boot by setting all the
- * IOPT cache entries in the CPU.
- * The mapping functions should be identical to pci_direct_iommu,
- * except for the handling of the high order bit that is required
- * by the Spider bridge. These should be split into a separate
- * file at the point where we get a different bridge chip.
- *
- * Copyright (C) 2005 IBM Deutschland Entwicklung GmbH,
- * Arnd Bergmann <arndb@de.ibm.com>
- *
- * Based on linear mapping
- * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#undef DEBUG
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/mm.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/sections.h>
-#include <asm/iommu.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-#include <asm/machdep.h>
-#include <asm/pmac_feature.h>
-#include <asm/abs_addr.h>
-#include <asm/system.h>
-#include <asm/ppc-pci.h>
-
-#include "iommu.h"
-
-static inline unsigned long
-get_iopt_entry(unsigned long real_address, unsigned long ioid,
- unsigned long prot)
-{
- return (prot & IOPT_PROT_MASK)
- | (IOPT_COHERENT)
- | (IOPT_ORDER_VC)
- | (real_address & IOPT_RPN_MASK)
- | (ioid & IOPT_IOID_MASK);
-}
-
-typedef struct {
- unsigned long val;
-} ioste;
-
-static inline ioste
-mk_ioste(unsigned long val)
-{
- ioste ioste = { .val = val, };
- return ioste;
-}
-
-static inline ioste
-get_iost_entry(unsigned long iopt_base, unsigned long io_address, unsigned page_size)
-{
- unsigned long ps;
- unsigned long iostep;
- unsigned long nnpt;
- unsigned long shift;
-
- switch (page_size) {
- case 0x1000000:
- ps = IOST_PS_16M;
- nnpt = 0; /* one page per segment */
- shift = 5; /* segment has 16 iopt entries */
- break;
-
- case 0x100000:
- ps = IOST_PS_1M;
- nnpt = 0; /* one page per segment */
- shift = 1; /* segment has 256 iopt entries */
- break;
-
- case 0x10000:
- ps = IOST_PS_64K;
- nnpt = 0x07; /* 8 pages per io page table */
- shift = 0; /* all entries are used */
- break;
-
- case 0x1000:
- ps = IOST_PS_4K;
- nnpt = 0x7f; /* 128 pages per io page table */
- shift = 0; /* all entries are used */
- break;
-
- default: /* not a known compile time constant */
- {
- /* BUILD_BUG_ON() is not usable here */
- extern void __get_iost_entry_bad_page_size(void);
- __get_iost_entry_bad_page_size();
- }
- break;
- }
-
- iostep = iopt_base +
- /* need 8 bytes per iopte */
- (((io_address / page_size * 8)
- /* align io page tables on 4k page boundaries */
- << shift)
- /* nnpt+1 pages go into each iopt */
- & ~(nnpt << 12));
-
- nnpt++; /* this seems to work, but the documentation is not clear
- about wether we put nnpt or nnpt-1 into the ioste bits.
- In theory, this can't work for 4k pages. */
- return mk_ioste(IOST_VALID_MASK
- | (iostep & IOST_PT_BASE_MASK)
- | ((nnpt << 5) & IOST_NNPT_MASK)
- | (ps & IOST_PS_MASK));
-}
-
-/* compute the address of an io pte */
-static inline unsigned long
-get_ioptep(ioste iost_entry, unsigned long io_address)
-{
- unsigned long iopt_base;
- unsigned long page_size;
- unsigned long page_number;
- unsigned long iopt_offset;
-
- iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
- page_size = iost_entry.val & IOST_PS_MASK;
-
- /* decode page size to compute page number */
- page_number = (io_address & 0x0fffffff) >> (10 + 2 * page_size);
- /* page number is an offset into the io page table */
- iopt_offset = (page_number << 3) & 0x7fff8ul;
- return iopt_base + iopt_offset;
-}
-
-/* compute the tag field of the iopt cache entry */
-static inline unsigned long
-get_ioc_tag(ioste iost_entry, unsigned long io_address)
-{
- unsigned long iopte = get_ioptep(iost_entry, io_address);
-
- return IOPT_VALID_MASK
- | ((iopte & 0x00000000000000ff8ul) >> 3)
- | ((iopte & 0x0000003fffffc0000ul) >> 9);
-}
-
-/* compute the hashed 6 bit index for the 4-way associative pte cache */
-static inline unsigned long
-get_ioc_hash(ioste iost_entry, unsigned long io_address)
-{
- unsigned long iopte = get_ioptep(iost_entry, io_address);
-
- return ((iopte & 0x000000000000001f8ul) >> 3)
- ^ ((iopte & 0x00000000000020000ul) >> 17)
- ^ ((iopte & 0x00000000000010000ul) >> 15)
- ^ ((iopte & 0x00000000000008000ul) >> 13)
- ^ ((iopte & 0x00000000000004000ul) >> 11)
- ^ ((iopte & 0x00000000000002000ul) >> 9)
- ^ ((iopte & 0x00000000000001000ul) >> 7);
-}
-
-/* same as above, but pretend that we have a simpler 1-way associative
- pte cache with an 8 bit index */
-static inline unsigned long
-get_ioc_hash_1way(ioste iost_entry, unsigned long io_address)
-{
- unsigned long iopte = get_ioptep(iost_entry, io_address);
-
- return ((iopte & 0x000000000000001f8ul) >> 3)
- ^ ((iopte & 0x00000000000020000ul) >> 17)
- ^ ((iopte & 0x00000000000010000ul) >> 15)
- ^ ((iopte & 0x00000000000008000ul) >> 13)
- ^ ((iopte & 0x00000000000004000ul) >> 11)
- ^ ((iopte & 0x00000000000002000ul) >> 9)
- ^ ((iopte & 0x00000000000001000ul) >> 7)
- ^ ((iopte & 0x0000000000000c000ul) >> 8);
-}
-
-static inline ioste
-get_iost_cache(void __iomem *base, unsigned long index)
-{
- unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
- return mk_ioste(in_be64(&p[index]));
-}
-
-static inline void
-set_iost_cache(void __iomem *base, unsigned long index, ioste ste)
-{
- unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
- pr_debug("ioste %02lx was %016lx, store %016lx", index,
- get_iost_cache(base, index).val, ste.val);
- out_be64(&p[index], ste.val);
- pr_debug(" now %016lx\n", get_iost_cache(base, index).val);
-}
-
-static inline unsigned long
-get_iopt_cache(void __iomem *base, unsigned long index, unsigned long *tag)
-{
- unsigned long __iomem *tags = (void *)(base + IOC_PT_CACHE_DIR);
- unsigned long __iomem *p = (void *)(base + IOC_PT_CACHE_REG);
-
- *tag = tags[index];
- rmb();
- return *p;
-}
-
-static inline void
-set_iopt_cache(void __iomem *base, unsigned long index,
- unsigned long tag, unsigned long val)
-{
- unsigned long __iomem *tags = base + IOC_PT_CACHE_DIR;
- unsigned long __iomem *p = base + IOC_PT_CACHE_REG;
- pr_debug("iopt %02lx was v%016lx/t%016lx, store v%016lx/t%016lx\n",
- index, get_iopt_cache(base, index, &oldtag), oldtag, val, tag);
-
- out_be64(p, val);
- out_be64(&tags[index], tag);
-}
-
-static inline void
-set_iost_origin(void __iomem *base)
-{
- unsigned long __iomem *p = base + IOC_ST_ORIGIN;
- unsigned long origin = IOSTO_ENABLE | IOSTO_SW;
-
- pr_debug("iost_origin %016lx, now %016lx\n", in_be64(p), origin);
- out_be64(p, origin);
-}
-
-static inline void
-set_iocmd_config(void __iomem *base)
-{
- unsigned long __iomem *p = base + 0xc00;
- unsigned long conf;
-
- conf = in_be64(p);
- pr_debug("iost_conf %016lx, now %016lx\n", conf, conf | IOCMD_CONF_TE);
- out_be64(p, conf | IOCMD_CONF_TE);
-}
-
-/* FIXME: get these from the device tree */
-#define ioc_base 0x20000511000ull
-#define ioc_mmio_base 0x20000510000ull
-#define ioid 0x48a
-#define iopt_phys_offset (- 0x20000000) /* We have a 512MB offset from the SB */
-#define io_page_size 0x1000000
-
-static unsigned long map_iopt_entry(unsigned long address)
-{
- switch (address >> 20) {
- case 0x600:
- address = 0x24020000000ull; /* spider i/o */
- break;
- default:
- address += iopt_phys_offset;
- break;
- }
-
- return get_iopt_entry(address, ioid, IOPT_PROT_RW);
-}
-
-static void iommu_bus_setup_null(struct pci_bus *b) { }
-static void iommu_dev_setup_null(struct pci_dev *d) { }
-
-/* initialize the iommu to support a simple linear mapping
- * for each DMA window used by any device. For now, we
- * happen to know that there is only one DMA window in use,
- * starting at iopt_phys_offset. */
-static void cell_map_iommu(void)
-{
- unsigned long address;
- void __iomem *base;
- ioste ioste;
- unsigned long index;
-
- base = __ioremap(ioc_base, 0x1000, _PAGE_NO_CACHE);
- pr_debug("%lx mapped to %p\n", ioc_base, base);
- set_iocmd_config(base);
- iounmap(base);
-
- base = __ioremap(ioc_mmio_base, 0x1000, _PAGE_NO_CACHE);
- pr_debug("%lx mapped to %p\n", ioc_mmio_base, base);
-
- set_iost_origin(base);
-
- for (address = 0; address < 0x100000000ul; address += io_page_size) {
- ioste = get_iost_entry(0x10000000000ul, address, io_page_size);
- if ((address & 0xfffffff) == 0) /* segment start */
- set_iost_cache(base, address >> 28, ioste);
- index = get_ioc_hash_1way(ioste, address);
- pr_debug("addr %08lx, index %02lx, ioste %016lx\n",
- address, index, ioste.val);
- set_iopt_cache(base,
- get_ioc_hash_1way(ioste, address),
- get_ioc_tag(ioste, address),
- map_iopt_entry(address));
- }
- iounmap(base);
-}
-
-
-static void *cell_alloc_coherent(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag)
-{
- void *ret;
-
- ret = (void *)__get_free_pages(flag, get_order(size));
- if (ret != NULL) {
- memset(ret, 0, size);
- *dma_handle = virt_to_abs(ret) | CELL_DMA_VALID;
- }
- return ret;
-}
-
-static void cell_free_coherent(struct device *hwdev, size_t size,
- void *vaddr, dma_addr_t dma_handle)
-{
- free_pages((unsigned long)vaddr, get_order(size));
-}
-
-static dma_addr_t cell_map_single(struct device *hwdev, void *ptr,
- size_t size, enum dma_data_direction direction)
-{
- return virt_to_abs(ptr) | CELL_DMA_VALID;
-}
-
-static void cell_unmap_single(struct device *hwdev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction direction)
-{
-}
-
-static int cell_map_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction)
-{
- int i;
-
- for (i = 0; i < nents; i++, sg++) {
- sg->dma_address = (page_to_phys(sg->page) + sg->offset)
- | CELL_DMA_VALID;
- sg->dma_length = sg->length;
- }
-
- return nents;
-}
-
-static void cell_unmap_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction)
-{
-}
-
-static int cell_dma_supported(struct device *dev, u64 mask)
-{
- return mask < 0x100000000ull;
-}
-
-void cell_init_iommu(void)
-{
- cell_map_iommu();
-
- /* Direct I/O, IOMMU off */
- ppc_md.iommu_dev_setup = iommu_dev_setup_null;
- ppc_md.iommu_bus_setup = iommu_bus_setup_null;
-
- pci_dma_ops.alloc_coherent = cell_alloc_coherent;
- pci_dma_ops.free_coherent = cell_free_coherent;
- pci_dma_ops.map_single = cell_map_single;
- pci_dma_ops.unmap_single = cell_unmap_single;
- pci_dma_ops.map_sg = cell_map_sg;
- pci_dma_ops.unmap_sg = cell_unmap_sg;
- pci_dma_ops.dma_supported = cell_dma_supported;
-}
+++ /dev/null
-#ifndef CELL_IOMMU_H
-#define CELL_IOMMU_H
-
-/* some constants */
-enum {
- /* segment table entries */
- IOST_VALID_MASK = 0x8000000000000000ul,
- IOST_TAG_MASK = 0x3000000000000000ul,
- IOST_PT_BASE_MASK = 0x000003fffffff000ul,
- IOST_NNPT_MASK = 0x0000000000000fe0ul,
- IOST_PS_MASK = 0x000000000000000ful,
-
- IOST_PS_4K = 0x1,
- IOST_PS_64K = 0x3,
- IOST_PS_1M = 0x5,
- IOST_PS_16M = 0x7,
-
- /* iopt tag register */
- IOPT_VALID_MASK = 0x0000000200000000ul,
- IOPT_TAG_MASK = 0x00000001fffffffful,
-
- /* iopt cache register */
- IOPT_PROT_MASK = 0xc000000000000000ul,
- IOPT_PROT_NONE = 0x0000000000000000ul,
- IOPT_PROT_READ = 0x4000000000000000ul,
- IOPT_PROT_WRITE = 0x8000000000000000ul,
- IOPT_PROT_RW = 0xc000000000000000ul,
- IOPT_COHERENT = 0x2000000000000000ul,
-
- IOPT_ORDER_MASK = 0x1800000000000000ul,
- /* order access to same IOID/VC on same address */
- IOPT_ORDER_ADDR = 0x0800000000000000ul,
- /* similar, but only after a write access */
- IOPT_ORDER_WRITES = 0x1000000000000000ul,
- /* Order all accesses to same IOID/VC */
- IOPT_ORDER_VC = 0x1800000000000000ul,
-
- IOPT_RPN_MASK = 0x000003fffffff000ul,
- IOPT_HINT_MASK = 0x0000000000000800ul,
- IOPT_IOID_MASK = 0x00000000000007fful,
-
- IOSTO_ENABLE = 0x8000000000000000ul,
- IOSTO_ORIGIN = 0x000003fffffff000ul,
- IOSTO_HW = 0x0000000000000800ul,
- IOSTO_SW = 0x0000000000000400ul,
-
- IOCMD_CONF_TE = 0x0000800000000000ul,
-
- /* memory mapped registers */
- IOC_PT_CACHE_DIR = 0x000,
- IOC_ST_CACHE_DIR = 0x800,
- IOC_PT_CACHE_REG = 0x910,
- IOC_ST_ORIGIN = 0x918,
- IOC_CONF = 0x930,
-
- /* The high bit needs to be set on every DMA address,
- only 2GB are addressable */
- CELL_DMA_VALID = 0x80000000,
- CELL_DMA_MASK = 0x7fffffff,
-};
-
-
-void cell_init_iommu(void);
-
-#endif
+++ /dev/null
-/*
- * linux/arch/powerpc/platforms/cell/cell_setup.c
- *
- * Copyright (C) 1995 Linus Torvalds
- * Adapted from 'alpha' version by Gary Thomas
- * Modified by Cort Dougan (cort@cs.nmt.edu)
- * Modified by PPC64 Team, IBM Corp
- * Modified by Cell Team, IBM Deutschland Entwicklung GmbH
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#undef DEBUG
-
-#include <linux/config.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/seq_file.h>
-#include <linux/root_dev.h>
-#include <linux/console.h>
-
-#include <asm/mmu.h>
-#include <asm/processor.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/prom.h>
-#include <asm/rtas.h>
-#include <asm/pci-bridge.h>
-#include <asm/iommu.h>
-#include <asm/dma.h>
-#include <asm/machdep.h>
-#include <asm/time.h>
-#include <asm/nvram.h>
-#include <asm/cputable.h>
-#include <asm/ppc-pci.h>
-#include <asm/irq.h>
-
-#include "interrupt.h"
-#include "iommu.h"
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-void cell_show_cpuinfo(struct seq_file *m)
-{
- struct device_node *root;
- const char *model = "";
-
- root = of_find_node_by_path("/");
- if (root)
- model = get_property(root, "model", NULL);
- seq_printf(m, "machine\t\t: CHRP %s\n", model);
- of_node_put(root);
-}
-
-static void cell_progress(char *s, unsigned short hex)
-{
- printk("*** %04x : %s\n", hex, s ? s : "");
-}
-
-static void __init cell_setup_arch(void)
-{
- ppc_md.init_IRQ = iic_init_IRQ;
- ppc_md.get_irq = iic_get_irq;
-
-#ifdef CONFIG_SMP
- smp_init_cell();
-#endif
-
- /* init to some ~sane value until calibrate_delay() runs */
- loops_per_jiffy = 50000000;
-
- if (ROOT_DEV == 0) {
- printk("No ramdisk, default root is /dev/hda2\n");
- ROOT_DEV = Root_HDA2;
- }
-
- /* Find and initialize PCI host bridges */
- init_pci_config_tokens();
- find_and_init_phbs();
- spider_init_IRQ();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
- mmio_nvram_init();
-}
-
-/*
- * Early initialization. Relocation is on but do not reference unbolted pages
- */
-static void __init cell_init_early(void)
-{
- DBG(" -> cell_init_early()\n");
-
- hpte_init_native();
-
- cell_init_iommu();
-
- ppc64_interrupt_controller = IC_CELL_PIC;
-
- DBG(" <- cell_init_early()\n");
-}
-
-
-static int __init cell_probe(int platform)
-{
- if (platform != PLATFORM_CELL)
- return 0;
-
- return 1;
-}
-
-struct machdep_calls __initdata cell_md = {
- .probe = cell_probe,
- .setup_arch = cell_setup_arch,
- .init_early = cell_init_early,
- .show_cpuinfo = cell_show_cpuinfo,
- .restart = rtas_restart,
- .power_off = rtas_power_off,
- .halt = rtas_halt,
- .get_boot_time = rtas_get_boot_time,
- .get_rtc_time = rtas_get_rtc_time,
- .set_rtc_time = rtas_set_rtc_time,
- .calibrate_decr = generic_calibrate_decr,
- .progress = cell_progress,
-};
+++ /dev/null
-/*
- * External Interrupt Controller on Spider South Bridge
- *
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
- *
- * Author: Arnd Bergmann <arndb@de.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include <asm/pgtable.h>
-#include <asm/prom.h>
-#include <asm/io.h>
-
-#include "interrupt.h"
-
-/* register layout taken from Spider spec, table 7.4-4 */
-enum {
- TIR_DEN = 0x004, /* Detection Enable Register */
- TIR_MSK = 0x084, /* Mask Level Register */
- TIR_EDC = 0x0c0, /* Edge Detection Clear Register */
- TIR_PNDA = 0x100, /* Pending Register A */
- TIR_PNDB = 0x104, /* Pending Register B */
- TIR_CS = 0x144, /* Current Status Register */
- TIR_LCSA = 0x150, /* Level Current Status Register A */
- TIR_LCSB = 0x154, /* Level Current Status Register B */
- TIR_LCSC = 0x158, /* Level Current Status Register C */
- TIR_LCSD = 0x15c, /* Level Current Status Register D */
- TIR_CFGA = 0x200, /* Setting Register A0 */
- TIR_CFGB = 0x204, /* Setting Register B0 */
- /* 0x208 ... 0x3ff Setting Register An/Bn */
- TIR_PPNDA = 0x400, /* Packet Pending Register A */
- TIR_PPNDB = 0x404, /* Packet Pending Register B */
- TIR_PIERA = 0x408, /* Packet Output Error Register A */
- TIR_PIERB = 0x40c, /* Packet Output Error Register B */
- TIR_PIEN = 0x444, /* Packet Output Enable Register */
- TIR_PIPND = 0x454, /* Packet Output Pending Register */
- TIRDID = 0x484, /* Spider Device ID Register */
- REISTIM = 0x500, /* Reissue Command Timeout Time Setting */
- REISTIMEN = 0x504, /* Reissue Command Timeout Setting */
- REISWAITEN = 0x508, /* Reissue Wait Control*/
-};
-
-static void __iomem *spider_pics[4];
-
-static void __iomem *spider_get_pic(int irq)
-{
- int node = irq / IIC_NODE_STRIDE;
- irq %= IIC_NODE_STRIDE;
-
- if (irq >= IIC_EXT_OFFSET &&
- irq < IIC_EXT_OFFSET + IIC_NUM_EXT &&
- spider_pics)
- return spider_pics[node];
- return NULL;
-}
-
-static int spider_get_nr(unsigned int irq)
-{
- return (irq % IIC_NODE_STRIDE) - IIC_EXT_OFFSET;
-}
-
-static void __iomem *spider_get_irq_config(int irq)
-{
- void __iomem *pic;
- pic = spider_get_pic(irq);
- return pic + TIR_CFGA + 8 * spider_get_nr(irq);
-}
-
-static void spider_enable_irq(unsigned int irq)
-{
- void __iomem *cfg = spider_get_irq_config(irq);
- irq = spider_get_nr(irq);
-
- out_be32(cfg, in_be32(cfg) | 0x3107000eu);
- out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
-}
-
-static void spider_disable_irq(unsigned int irq)
-{
- void __iomem *cfg = spider_get_irq_config(irq);
- irq = spider_get_nr(irq);
-
- out_be32(cfg, in_be32(cfg) & ~0x30000000u);
-}
-
-static unsigned int spider_startup_irq(unsigned int irq)
-{
- spider_enable_irq(irq);
- return 0;
-}
-
-static void spider_shutdown_irq(unsigned int irq)
-{
- spider_disable_irq(irq);
-}
-
-static void spider_end_irq(unsigned int irq)
-{
- spider_enable_irq(irq);
-}
-
-static void spider_ack_irq(unsigned int irq)
-{
- spider_disable_irq(irq);
- iic_local_enable();
-}
-
-static struct hw_interrupt_type spider_pic = {
- .typename = " SPIDER ",
- .startup = spider_startup_irq,
- .shutdown = spider_shutdown_irq,
- .enable = spider_enable_irq,
- .disable = spider_disable_irq,
- .ack = spider_ack_irq,
- .end = spider_end_irq,
-};
-
-
-int spider_get_irq(unsigned long int_pending)
-{
- void __iomem *regs = spider_get_pic(int_pending);
- unsigned long cs;
- int irq;
-
- cs = in_be32(regs + TIR_CS);
-
- irq = cs >> 24;
- if (irq != 63)
- return irq;
-
- return -1;
-}
-
-void spider_init_IRQ(void)
-{
- int node;
- struct device_node *dn;
- unsigned int *property;
- long spiderpic;
- int n;
-
-/* FIXME: detect multiple PICs as soon as the device tree has them */
- for (node = 0; node < 1; node++) {
- dn = of_find_node_by_path("/");
- n = prom_n_addr_cells(dn);
- property = (unsigned int *) get_property(dn,
- "platform-spider-pic", NULL);
-
- if (!property)
- continue;
- for (spiderpic = 0; n > 0; --n)
- spiderpic = (spiderpic << 32) + *property++;
- printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
- spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
- for (n = 0; n < IIC_NUM_EXT; n++) {
- int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
- get_irq_desc(irq)->handler = &spider_pic;
-
- /* do not mask any interrupts because of level */
- out_be32(spider_pics[node] + TIR_MSK, 0x0);
-
- /* disable edge detection clear */
- /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
-
- /* enable interrupt packets to be output */
- out_be32(spider_pics[node] + TIR_PIEN,
- in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
-
- /* Enable the interrupt detection enable bit. Do this last! */
- out_be32(spider_pics[node] + TIR_DEN,
- in_be32(spider_pics[node] +TIR_DEN) | 0x1);
-
- }
- }
-}
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff