include/asm-x86_64/io_apic.h

   1 #ifndef __ASM_IO_APIC_H
   2 #define __ASM_IO_APIC_H
   3
   4 #include <asm/types.h>
   5 #include <asm/mpspec.h>
   6
   7 /*
   8  * Intel IO-APIC support for SMP and UP systems.
   9  *
  10  * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
  11  */
  12
  13 #define APIC_MISMATCH_DEBUG
  14
  15 /*
  16  * The structure of the IO-APIC:
  17  */
  18 union IO_APIC_reg_00 {
  19         u32     raw;
  20         struct {
  21                 u32     __reserved_2    : 14,
  22                         LTS             :  1,
  23                         delivery_type   :  1,
  24                         __reserved_1    :  8,
  25                         ID              :  8;
  26         } __attribute__ ((packed)) bits;
  27 };
  28
  29 union IO_APIC_reg_01 {
  30         u32     raw;
  31         struct {
  32                 u32     version         :  8,
  33                 __reserved_2    :  7,
  34                 PRQ             :  1,
  35                 entries         :  8,
  36                 __reserved_1    :  8;
  37         } __attribute__ ((packed)) bits;
  38 };
  39
  40 union IO_APIC_reg_02 {
  41         u32     raw;
  42         struct {
  43                 u32     __reserved_2    : 24,
  44                 arbitration     :  4,
  45                 __reserved_1    :  4;
  46         } __attribute__ ((packed)) bits;
  47 };
  48
  49 union IO_APIC_reg_03 {
  50         u32     raw;
  51         struct {
  52                 u32     boot_DT         :  1,
  53                         __reserved_1    : 31;
  54         } __attribute__ ((packed)) bits;
  55 };
  56
  57 /*
  58  * # of IO-APICs and # of IRQ routing registers
  59  */
  60 extern int nr_ioapics;
  61 extern int nr_ioapic_registers[MAX_IO_APICS];
  62
  63 enum ioapic_irq_destination_types {
  64         dest_Fixed = 0,
  65         dest_LowestPrio = 1,
  66         dest_SMI = 2,
  67         dest__reserved_1 = 3,
  68         dest_NMI = 4,
  69         dest_INIT = 5,
  70         dest__reserved_2 = 6,
  71         dest_ExtINT = 7
  72 };
  73
  74 struct IO_APIC_route_entry {
  75         __u32   vector          :  8,
  76                 delivery_mode   :  3,   /* 000: FIXED
  77                                          * 001: lowest prio
  78                                          * 111: ExtINT
  79                                          */
  80                 dest_mode       :  1,   /* 0: physical, 1: logical */
  81                 delivery_status :  1,
  82                 polarity        :  1,
  83                 irr             :  1,
  84                 trigger         :  1,   /* 0: edge, 1: level */
  85                 mask            :  1,   /* 0: enabled, 1: disabled */
  86                 __reserved_2    : 15;
  87
  88         __u32   __reserved_3    : 24,
  89                 dest            :  8;
  90 } __attribute__ ((packed));
  91
  92 /*
  93  * MP-BIOS irq configuration table structures:
  94  */
  95
  96 /* I/O APIC entries */
  97 extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
  98
  99 /* # of MP IRQ source entries */
 100 extern int mp_irq_entries;
 101
 102 /* MP IRQ source entries */
 103 extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
 104
 105 /* non-0 if default (table-less) MP configuration */
 106 extern int mpc_default_type;
 107
 108 /* 1 if "noapic" boot option passed */
 109 extern int skip_ioapic_setup;
 110
 111 /*
 112  * If we use the IO-APIC for IRQ routing, disable automatic
 113  * assignment of PCI IRQ's.
 114  */
 115 #define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 116
 117 #ifdef CONFIG_ACPI
 118 extern int io_apic_get_version (int ioapic);
 119 extern int io_apic_get_redir_entries (int ioapic);
 120 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
 121 #endif
 122
 123 extern int sis_apic_bug; /* dummy */
 124
 125 void enable_NMI_through_LVT0 (void * dummy);
 126
 127 extern spinlock_t i8259A_lock;
 128
 129 #endif