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