arch/x86/mach-visws/traps.c

   1 /* VISWS traps */
   2
   3 #include <linux/sched.h>
   4 #include <linux/kernel.h>
   5 #include <linux/init.h>
   6 #include <linux/pci.h>
   7 #include <linux/pci_ids.h>
   8
   9 #include <asm/io.h>
  10 #include <asm/arch_hooks.h>
  11 #include <asm/apic.h>
  12 #include "cobalt.h"
  13 #include "lithium.h"
  14
  15
  16 #define A01234 (LI_INTA_0 | LI_INTA_1 | LI_INTA_2 | LI_INTA_3 | LI_INTA_4)
  17 #define BCD (LI_INTB | LI_INTC | LI_INTD)
  18 #define ALLDEVS (A01234 | BCD)
  19
  20 static __init void lithium_init(void)
  21 {
  22         set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
  23         set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);
  24
  25         if ((li_pcia_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
  26             (li_pcia_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
  27                 printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'A');
  28                 panic("This machine is not SGI Visual Workstation 320/540");
  29         }
  30
  31         if ((li_pcib_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
  32             (li_pcib_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
  33                 printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'B');
  34                 panic("This machine is not SGI Visual Workstation 320/540");
  35         }
  36
  37         li_pcia_write16(LI_PCI_INTEN, ALLDEVS);
  38         li_pcib_write16(LI_PCI_INTEN, ALLDEVS);
  39 }
  40
  41 static __init void cobalt_init(void)
  42 {
  43         /*
  44          * On normal SMP PC this is used only with SMP, but we have to
  45          * use it and set it up here to start the Cobalt clock
  46          */
  47         set_fixmap(FIX_APIC_BASE, APIC_DEFAULT_PHYS_BASE);
  48         setup_local_APIC();
  49         printk(KERN_INFO "Local APIC Version %#x, ID %#x\n",
  50                 (unsigned int)apic_read(APIC_LVR),
  51                 (unsigned int)apic_read(APIC_ID));
  52
  53         set_fixmap(FIX_CO_CPU, CO_CPU_PHYS);
  54         set_fixmap(FIX_CO_APIC, CO_APIC_PHYS);
  55         printk(KERN_INFO "Cobalt Revision %#lx, APIC ID %#lx\n",
  56                 co_cpu_read(CO_CPU_REV), co_apic_read(CO_APIC_ID));
  57
  58         /* Enable Cobalt APIC being careful to NOT change the ID! */
  59         co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID) | CO_APIC_ENABLE);
  60
  61         printk(KERN_INFO "Cobalt APIC enabled: ID reg %#lx\n",
  62                 co_apic_read(CO_APIC_ID));
  63 }
  64
  65 void __init trap_init_hook(void)
  66 {
  67         lithium_init();
  68         cobalt_init();
  69 }