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
   7 /*
   8  * Intel IO-APIC support for SMP and UP systems.
   9  *
  10  * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
  11  */
  12
  13 #ifdef CONFIG_X86_IO_APIC
  14
  15 #ifdef CONFIG_PCI_MSI
  16 static inline int use_pci_vector(void)  {return 1;}
  17 static inline void disable_edge_ioapic_vector(unsigned int vector) { }
  18 static inline void mask_and_ack_level_ioapic_vector(unsigned int vector) { }
  19 static inline void end_edge_ioapic_vector (unsigned int vector) { }
  20 #define startup_level_ioapic    startup_level_ioapic_vector
  21 #define shutdown_level_ioapic   mask_IO_APIC_vector
  22 #define enable_level_ioapic     unmask_IO_APIC_vector
  23 #define disable_level_ioapic    mask_IO_APIC_vector
  24 #define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_vector
  25 #define end_level_ioapic        end_level_ioapic_vector
  26 #define set_ioapic_affinity     set_ioapic_affinity_vector
  27
  28 #define startup_edge_ioapic     startup_edge_ioapic_vector
  29 #define shutdown_edge_ioapic    disable_edge_ioapic_vector
  30 #define enable_edge_ioapic      unmask_IO_APIC_vector
  31 #define disable_edge_ioapic     disable_edge_ioapic_vector
  32 #define ack_edge_ioapic         ack_edge_ioapic_vector
  33 #define end_edge_ioapic         end_edge_ioapic_vector
  34 #else
  35 static inline int use_pci_vector(void)  {return 0;}
  36 static inline void disable_edge_ioapic_irq(unsigned int irq) { }
  37 static inline void mask_and_ack_level_ioapic_irq(unsigned int irq) { }
  38 static inline void end_edge_ioapic_irq (unsigned int irq) { }
  39 #define startup_level_ioapic    startup_level_ioapic_irq
  40 #define shutdown_level_ioapic   mask_IO_APIC_irq
  41 #define enable_level_ioapic     unmask_IO_APIC_irq
  42 #define disable_level_ioapic    mask_IO_APIC_irq
  43 #define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_irq
  44 #define end_level_ioapic        end_level_ioapic_irq
  45 #define set_ioapic_affinity     set_ioapic_affinity_irq
  46
  47 #define startup_edge_ioapic     startup_edge_ioapic_irq
  48 #define shutdown_edge_ioapic    disable_edge_ioapic_irq
  49 #define enable_edge_ioapic      unmask_IO_APIC_irq
  50 #define disable_edge_ioapic     disable_edge_ioapic_irq
  51 #define ack_edge_ioapic         ack_edge_ioapic_irq
  52 #define end_edge_ioapic         end_edge_ioapic_irq
  53 #endif
  54
  55 #define IO_APIC_BASE(idx) \
  56                 ((volatile int *)(__fix_to_virt(FIX_IO_APIC_BASE_0 + idx) \
  57                 + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK)))
  58
  59 /*
  60  * The structure of the IO-APIC:
  61  */
  62 union IO_APIC_reg_00 {
  63         u32     raw;
  64         struct {
  65                 u32     __reserved_2    : 14,
  66                         LTS             :  1,
  67                         delivery_type   :  1,
  68                         __reserved_1    :  8,
  69                         ID              :  8;
  70         } __attribute__ ((packed)) bits;
  71 };
  72
  73 union IO_APIC_reg_01 {
  74         u32     raw;
  75         struct {
  76                 u32     version         :  8,
  77                         __reserved_2    :  7,
  78                         PRQ             :  1,
  79                         entries         :  8,
  80                         __reserved_1    :  8;
  81         } __attribute__ ((packed)) bits;
  82 };
  83
  84 union IO_APIC_reg_02 {
  85         u32     raw;
  86         struct {
  87                 u32     __reserved_2    : 24,
  88                         arbitration     :  4,
  89                         __reserved_1    :  4;
  90         } __attribute__ ((packed)) bits;
  91 };
  92
  93 union IO_APIC_reg_03 {
  94         u32     raw;
  95         struct {
  96                 u32     boot_DT         :  1,
  97                         __reserved_1    : 31;
  98         } __attribute__ ((packed)) bits;
  99 };
 100
 101 /*
 102  * # of IO-APICs and # of IRQ routing registers
 103  */
 104 extern int nr_ioapics;
 105 extern int nr_ioapic_registers[MAX_IO_APICS];
 106
 107 enum ioapic_irq_destination_types {
 108         dest_Fixed = 0,
 109         dest_LowestPrio = 1,
 110         dest_SMI = 2,
 111         dest__reserved_1 = 3,
 112         dest_NMI = 4,
 113         dest_INIT = 5,
 114         dest__reserved_2 = 6,
 115         dest_ExtINT = 7
 116 };
 117
 118 struct IO_APIC_route_entry {
 119         __u32   vector          :  8,
 120                 delivery_mode   :  3,   /* 000: FIXED
 121                                          * 001: lowest prio
 122                                          * 111: ExtINT
 123                                          */
 124                 dest_mode       :  1,   /* 0: physical, 1: logical */
 125                 delivery_status :  1,
 126                 polarity        :  1,
 127                 irr             :  1,
 128                 trigger         :  1,   /* 0: edge, 1: level */
 129                 mask            :  1,   /* 0: enabled, 1: disabled */
 130                 __reserved_2    : 15;
 131
 132         union {         struct { __u32
 133                                         __reserved_1    : 24,
 134                                         physical_dest   :  4,
 135                                         __reserved_2    :  4;
 136                         } physical;
 137
 138                         struct { __u32
 139                                         __reserved_1    : 24,
 140                                         logical_dest    :  8;
 141                         } logical;
 142         } dest;
 143
 144 } __attribute__ ((packed));
 145
 146 /*
 147  * MP-BIOS irq configuration table structures:
 148  */
 149
 150 /* I/O APIC entries */
 151 extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
 152
 153 /* # of MP IRQ source entries */
 154 extern int mp_irq_entries;
 155
 156 /* MP IRQ source entries */
 157 extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
 158
 159 /* non-0 if default (table-less) MP configuration */
 160 extern int mpc_default_type;
 161
 162 static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
 163 {
 164         *IO_APIC_BASE(apic) = reg;
 165         return *(IO_APIC_BASE(apic)+4);
 166 }
 167
 168 static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
 169 {
 170         *IO_APIC_BASE(apic) = reg;
 171         *(IO_APIC_BASE(apic)+4) = value;
 172 }
 173
 174 /*
 175  * Re-write a value: to be used for read-modify-write
 176  * cycles where the read already set up the index register.
 177  *
 178  * Older SiS APIC requires we rewrite the index regiser
 179  */
 180 extern int sis_apic_bug;
 181 static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
 182 {
 183         if (sis_apic_bug)
 184                 *IO_APIC_BASE(apic) = reg;
 185         *(IO_APIC_BASE(apic)+4) = value;
 186 }
 187
 188 /* 1 if "noapic" boot option passed */
 189 extern int skip_ioapic_setup;
 190
 191 /*
 192  * If we use the IO-APIC for IRQ routing, disable automatic
 193  * assignment of PCI IRQ's.
 194  */
 195 #define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 196
 197 #ifdef CONFIG_ACPI
 198 extern int io_apic_get_unique_id (int ioapic, int apic_id);
 199 extern int io_apic_get_version (int ioapic);
 200 extern int io_apic_get_redir_entries (int ioapic);
 201 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
 202 extern int timer_uses_ioapic_pin_0;
 203 #endif /* CONFIG_ACPI */
 204
 205 extern int (*ioapic_renumber_irq)(int ioapic, int irq);
 206
 207 #else  /* !CONFIG_X86_IO_APIC */
 208 #define io_apic_assign_pci_irqs 0
 209 #endif
 210
 211 extern int assign_irq_vector(int irq);
 212
 213 #endif