include/asm-x86/io_apic.h

   1 #ifndef __ASM_IO_APIC_H
   2 #define __ASM_IO_APIC_H
   3
   4 #include <linux/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 /* I/O Unit Redirection Table */
  15 #define IO_APIC_REDIR_VECTOR_MASK       0x000FF
  16 #define IO_APIC_REDIR_DEST_LOGICAL      0x00800
  17 #define IO_APIC_REDIR_DEST_PHYSICAL     0x00000
  18 #define IO_APIC_REDIR_SEND_PENDING      (1 << 12)
  19 #define IO_APIC_REDIR_REMOTE_IRR        (1 << 14)
  20 #define IO_APIC_REDIR_LEVEL_TRIGGER     (1 << 15)
  21 #define IO_APIC_REDIR_MASKED            (1 << 16)
  22
  23 /*
  24  * The structure of the IO-APIC:
  25  */
  26 union IO_APIC_reg_00 {
  27         u32     raw;
  28         struct {
  29                 u32     __reserved_2    : 14,
  30                         LTS             :  1,
  31                         delivery_type   :  1,
  32                         __reserved_1    :  8,
  33                         ID              :  8;
  34         } __attribute__ ((packed)) bits;
  35 };
  36
  37 union IO_APIC_reg_01 {
  38         u32     raw;
  39         struct {
  40                 u32     version         :  8,
  41                         __reserved_2    :  7,
  42                         PRQ             :  1,
  43                         entries         :  8,
  44                         __reserved_1    :  8;
  45         } __attribute__ ((packed)) bits;
  46 };
  47
  48 union IO_APIC_reg_02 {
  49         u32     raw;
  50         struct {
  51                 u32     __reserved_2    : 24,
  52                         arbitration     :  4,
  53                         __reserved_1    :  4;
  54         } __attribute__ ((packed)) bits;
  55 };
  56
  57 union IO_APIC_reg_03 {
  58         u32     raw;
  59         struct {
  60                 u32     boot_DT         :  1,
  61                         __reserved_1    : 31;
  62         } __attribute__ ((packed)) bits;
  63 };
  64
  65 enum ioapic_irq_destination_types {
  66         dest_Fixed = 0,
  67         dest_LowestPrio = 1,
  68         dest_SMI = 2,
  69         dest__reserved_1 = 3,
  70         dest_NMI = 4,
  71         dest_INIT = 5,
  72         dest__reserved_2 = 6,
  73         dest_ExtINT = 7
  74 };
  75
  76 struct IO_APIC_route_entry {
  77         __u32   vector          :  8,
  78                 delivery_mode   :  3,   /* 000: FIXED
  79                                          * 001: lowest prio
  80                                          * 111: ExtINT
  81                                          */
  82                 dest_mode       :  1,   /* 0: physical, 1: logical */
  83                 delivery_status :  1,
  84                 polarity        :  1,
  85                 irr             :  1,
  86                 trigger         :  1,   /* 0: edge, 1: level */
  87                 mask            :  1,   /* 0: enabled, 1: disabled */
  88                 __reserved_2    : 15;
  89
  90 #ifdef CONFIG_X86_32
  91         union {
  92                 struct {
  93                         __u32   __reserved_1    : 24,
  94                                 physical_dest   :  4,
  95                                 __reserved_2    :  4;
  96                 } physical;
  97
  98                 struct {
  99                         __u32   __reserved_1    : 24,
 100                                 logical_dest    :  8;
 101                 } logical;
 102         } dest;
 103 #else
 104         __u32   __reserved_3    : 24,
 105                 dest            :  8;
 106 #endif
 107
 108 } __attribute__ ((packed));
 109
 110 #ifdef CONFIG_X86_IO_APIC
 111
 112 /*
 113  * # of IO-APICs and # of IRQ routing registers
 114  */
 115 extern int nr_ioapics;
 116 extern int nr_ioapic_registers[MAX_IO_APICS];
 117
 118 /*
 119  * MP-BIOS irq configuration table structures:
 120  */
 121
 122 #define MP_MAX_IOAPIC_PIN 127
 123
 124 struct mp_config_ioapic {
 125         unsigned long mp_apicaddr;
 126         unsigned int mp_apicid;
 127         unsigned char mp_type;
 128         unsigned char mp_apicver;
 129         unsigned char mp_flags;
 130 };
 131
 132 struct mp_config_intsrc {
 133         unsigned int mp_dstapic;
 134         unsigned char mp_type;
 135         unsigned char mp_irqtype;
 136         unsigned short mp_irqflag;
 137         unsigned char mp_srcbus;
 138         unsigned char mp_srcbusirq;
 139         unsigned char mp_dstirq;
 140 };
 141
 142 /* I/O APIC entries */
 143 extern struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
 144
 145 /* # of MP IRQ source entries */
 146 extern int mp_irq_entries;
 147
 148 /* MP IRQ source entries */
 149 extern struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
 150
 151 /* non-0 if default (table-less) MP configuration */
 152 extern int mpc_default_type;
 153
 154 /* Older SiS APIC requires we rewrite the index register */
 155 extern int sis_apic_bug;
 156
 157 /* 1 if "noapic" boot option passed */
 158 extern int skip_ioapic_setup;
 159
 160 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
 161 extern int timer_through_8259;
 162
 163 static inline void disable_ioapic_setup(void)
 164 {
 165         skip_ioapic_setup = 1;
 166 }
 167
 168 /*
 169  * If we use the IO-APIC for IRQ routing, disable automatic
 170  * assignment of PCI IRQ's.
 171  */
 172 #define io_apic_assign_pci_irqs \
 173         (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 174
 175 #ifdef CONFIG_ACPI
 176 extern int io_apic_get_unique_id(int ioapic, int apic_id);
 177 extern int io_apic_get_version(int ioapic);
 178 extern int io_apic_get_redir_entries(int ioapic);
 179 extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
 180                                    int edge_level, int active_high_low);
 181 #endif /* CONFIG_ACPI */
 182
 183 extern int (*ioapic_renumber_irq)(int ioapic, int irq);
 184 extern void ioapic_init_mappings(void);
 185
 186 #else  /* !CONFIG_X86_IO_APIC */
 187 #define io_apic_assign_pci_irqs 0
 188 static const int timer_through_8259 = 0;
 189 static inline void ioapic_init_mappings(void) { }
 190 #endif
 191
 192 #endif