arch/x86/include/asm/io_apic.h

   1 #ifndef _ASM_X86_IO_APIC_H
   2 #define _ASM_X86_IO_APIC_H
   3
   4 #include <linux/types.h>
   5 #include <asm/mpspec.h>
   6 #include <asm/apicdef.h>
   7 #include <asm/irq_vectors.h>
   8 #include <asm/x86_init.h>
   9 /*
  10  * Intel IO-APIC support for SMP and UP systems.
  11  *
  12  * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
  13  */
  14
  15 /* I/O Unit Redirection Table */
  16 #define IO_APIC_REDIR_VECTOR_MASK       0x000FF
  17 #define IO_APIC_REDIR_DEST_LOGICAL      0x00800
  18 #define IO_APIC_REDIR_DEST_PHYSICAL     0x00000
  19 #define IO_APIC_REDIR_SEND_PENDING      (1 << 12)
  20 #define IO_APIC_REDIR_REMOTE_IRR        (1 << 14)
  21 #define IO_APIC_REDIR_LEVEL_TRIGGER     (1 << 15)
  22 #define IO_APIC_REDIR_MASKED            (1 << 16)
  23
  24 /*
  25  * The structure of the IO-APIC:
  26  */
  27 union IO_APIC_reg_00 {
  28         u32     raw;
  29         struct {
  30                 u32     __reserved_2    : 14,
  31                         LTS             :  1,
  32                         delivery_type   :  1,
  33                         __reserved_1    :  8,
  34                         ID              :  8;
  35         } __attribute__ ((packed)) bits;
  36 };
  37
  38 union IO_APIC_reg_01 {
  39         u32     raw;
  40         struct {
  41                 u32     version         :  8,
  42                         __reserved_2    :  7,
  43                         PRQ             :  1,
  44                         entries         :  8,
  45                         __reserved_1    :  8;
  46         } __attribute__ ((packed)) bits;
  47 };
  48
  49 union IO_APIC_reg_02 {
  50         u32     raw;
  51         struct {
  52                 u32     __reserved_2    : 24,
  53                         arbitration     :  4,
  54                         __reserved_1    :  4;
  55         } __attribute__ ((packed)) bits;
  56 };
  57
  58 union IO_APIC_reg_03 {
  59         u32     raw;
  60         struct {
  61                 u32     boot_DT         :  1,
  62                         __reserved_1    : 31;
  63         } __attribute__ ((packed)) bits;
  64 };
  65
  66 struct IO_APIC_route_entry {
  67         __u32   vector          :  8,
  68                 delivery_mode   :  3,   /* 000: FIXED
  69                                          * 001: lowest prio
  70                                          * 111: ExtINT
  71                                          */
  72                 dest_mode       :  1,   /* 0: physical, 1: logical */
  73                 delivery_status :  1,
  74                 polarity        :  1,
  75                 irr             :  1,
  76                 trigger         :  1,   /* 0: edge, 1: level */
  77                 mask            :  1,   /* 0: enabled, 1: disabled */
  78                 __reserved_2    : 15;
  79
  80         __u32   __reserved_3    : 24,
  81                 dest            :  8;
  82 } __attribute__ ((packed));
  83
  84 struct IR_IO_APIC_route_entry {
  85         __u64   vector          : 8,
  86                 zero            : 3,
  87                 index2          : 1,
  88                 delivery_status : 1,
  89                 polarity        : 1,
  90                 irr             : 1,
  91                 trigger         : 1,
  92                 mask            : 1,
  93                 reserved        : 31,
  94                 format          : 1,
  95                 index           : 15;
  96 } __attribute__ ((packed));
  97
  98 #define IOAPIC_AUTO     -1
  99 #define IOAPIC_EDGE     0
 100 #define IOAPIC_LEVEL    1
 101
 102 #ifdef CONFIG_X86_IO_APIC
 103
 104 /*
 105  * # of IO-APICs and # of IRQ routing registers
 106  */
 107 extern int nr_ioapics;
 108
 109 extern int mpc_ioapic_id(int ioapic);
 110 extern unsigned int mpc_ioapic_addr(int ioapic);
 111 extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
 112
 113 #define MP_MAX_IOAPIC_PIN 127
 114
 115 /* # of MP IRQ source entries */
 116 extern int mp_irq_entries;
 117
 118 /* MP IRQ source entries */
 119 extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
 120
 121 /* non-0 if default (table-less) MP configuration */
 122 extern int mpc_default_type;
 123
 124 /* Older SiS APIC requires we rewrite the index register */
 125 extern int sis_apic_bug;
 126
 127 /* 1 if "noapic" boot option passed */
 128 extern int skip_ioapic_setup;
 129
 130 /* 1 if "noapic" boot option passed */
 131 extern int noioapicquirk;
 132
 133 /* -1 if "noapic" boot option passed */
 134 extern int noioapicreroute;
 135
 136 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
 137 extern int timer_through_8259;
 138
 139 /*
 140  * If we use the IO-APIC for IRQ routing, disable automatic
 141  * assignment of PCI IRQ's.
 142  */
 143 #define io_apic_assign_pci_irqs \
 144         (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 145
 146 struct io_apic_irq_attr;
 147 extern int io_apic_set_pci_routing(struct device *dev, int irq,
 148                  struct io_apic_irq_attr *irq_attr);
 149 void setup_IO_APIC_irq_extra(u32 gsi);
 150 extern void ioapic_insert_resources(void);
 151
 152 int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
 153
 154 extern int save_ioapic_entries(void);
 155 extern void mask_ioapic_entries(void);
 156 extern int restore_ioapic_entries(void);
 157
 158 extern int get_nr_irqs_gsi(void);
 159
 160 extern void setup_ioapic_ids_from_mpc(void);
 161 extern void setup_ioapic_ids_from_mpc_nocheck(void);
 162
 163 struct mp_ioapic_gsi{
 164         u32 gsi_base;
 165         u32 gsi_end;
 166 };
 167 extern struct mp_ioapic_gsi  mp_gsi_routing[];
 168 extern u32 gsi_top;
 169 int mp_find_ioapic(u32 gsi);
 170 int mp_find_ioapic_pin(int ioapic, u32 gsi);
 171 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
 172 extern void __init pre_init_apic_IRQ0(void);
 173
 174 extern void mp_save_irq(struct mpc_intsrc *m);
 175
 176 extern void disable_ioapic_support(void);
 177
 178 extern void __init native_io_apic_init_mappings(void);
 179 extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg);
 180 extern void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int val);
 181 extern void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned int val);
 182
 183 static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
 184 {
 185         return x86_io_apic_ops.read(apic, reg);
 186 }
 187
 188 static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
 189 {
 190         x86_io_apic_ops.write(apic, reg, value);
 191 }
 192 static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
 193 {
 194         x86_io_apic_ops.modify(apic, reg, value);
 195 }
 196 #else  /* !CONFIG_X86_IO_APIC */
 197
 198 #define io_apic_assign_pci_irqs 0
 199 #define setup_ioapic_ids_from_mpc x86_init_noop
 200 static const int timer_through_8259 = 0;
 201 static inline void ioapic_insert_resources(void) { }
 202 #define gsi_top (NR_IRQS_LEGACY)
 203 static inline int mp_find_ioapic(u32 gsi) { return 0; }
 204
 205 struct io_apic_irq_attr;
 206 static inline int io_apic_set_pci_routing(struct device *dev, int irq,
 207                  struct io_apic_irq_attr *irq_attr) { return 0; }
 208
 209 static inline int save_ioapic_entries(void)
 210 {
 211         return -ENOMEM;
 212 }
 213
 214 static inline void mask_ioapic_entries(void) { }
 215 static inline int restore_ioapic_entries(void)
 216 {
 217         return -ENOMEM;
 218 }
 219
 220 static inline void mp_save_irq(struct mpc_intsrc *m) { };
 221 static inline void disable_ioapic_support(void) { }
 222 #define native_io_apic_init_mappings    NULL
 223 #define native_io_apic_read             NULL
 224 #define native_io_apic_write            NULL
 225 #define native_io_apic_modify           NULL
 226 #endif
 227
 228 #endif /* _ASM_X86_IO_APIC_H */