include/asm-i386/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 #ifdef CONFIG_X86_IO_APIC
  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         union {         struct { __u32
  90                                         __reserved_1    : 24,
  91                                         physical_dest   :  4,
  92                                         __reserved_2    :  4;
  93                         } physical;
  94
  95                         struct { __u32
  96                                         __reserved_1    : 24,
  97                                         logical_dest    :  8;
  98                         } logical;
  99         } dest;
 100
 101 } __attribute__ ((packed));
 102
 103 /*
 104  * MP-BIOS irq configuration table structures:
 105  */
 106
 107 /* I/O APIC entries */
 108 extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
 109
 110 /* # of MP IRQ source entries */
 111 extern int mp_irq_entries;
 112
 113 /* MP IRQ source entries */
 114 extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
 115
 116 /* non-0 if default (table-less) MP configuration */
 117 extern int mpc_default_type;
 118
 119 /* Older SiS APIC requires we rewrite the index register */
 120 extern int sis_apic_bug;
 121
 122 /* 1 if "noapic" boot option passed */
 123 extern int skip_ioapic_setup;
 124
 125 static inline void disable_ioapic_setup(void)
 126 {
 127         skip_ioapic_setup = 1;
 128 }
 129
 130 static inline int ioapic_setup_disabled(void)
 131 {
 132         return skip_ioapic_setup;
 133 }
 134
 135 /*
 136  * If we use the IO-APIC for IRQ routing, disable automatic
 137  * assignment of PCI IRQ's.
 138  */
 139 #define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 140
 141 #ifdef CONFIG_ACPI
 142 extern int io_apic_get_unique_id (int ioapic, int apic_id);
 143 extern int io_apic_get_version (int ioapic);
 144 extern int io_apic_get_redir_entries (int ioapic);
 145 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
 146 extern int timer_uses_ioapic_pin_0;
 147 #endif /* CONFIG_ACPI */
 148
 149 extern int (*ioapic_renumber_irq)(int ioapic, int irq);
 150
 151 #else  /* !CONFIG_X86_IO_APIC */
 152 #define io_apic_assign_pci_irqs 0
 153 static inline void disable_ioapic_setup(void) { }
 154 #endif
 155
 156 #endif