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
   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 extern int nr_ioapic_registers[MAX_IO_APICS];
 109
 110 #define MP_MAX_IOAPIC_PIN 127
 111
 112 /* I/O APIC entries */
 113 extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
 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_and_gsi_init(void);
 151 extern void ioapic_insert_resources(void);
 152
 153 int io_apic_setup_irq_pin(unsigned int irq, int node, struct io_apic_irq_attr *attr);
 154
 155 extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
 156 extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
 157 extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
 158 extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
 159 extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
 160
 161 extern int get_nr_irqs_gsi(void);
 162
 163 extern void setup_ioapic_ids_from_mpc(void);
 164 extern void setup_ioapic_ids_from_mpc_nocheck(void);
 165
 166 struct mp_ioapic_gsi{
 167         u32 gsi_base;
 168         u32 gsi_end;
 169 };
 170 extern struct mp_ioapic_gsi  mp_gsi_routing[];
 171 extern u32 gsi_top;
 172 int mp_find_ioapic(u32 gsi);
 173 int mp_find_ioapic_pin(int ioapic, u32 gsi);
 174 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
 175 extern void __init pre_init_apic_IRQ0(void);
 176
 177 extern void mp_save_irq(struct mpc_intsrc *m);
 178
 179 extern void disable_ioapic_support(void);
 180
 181 #else  /* !CONFIG_X86_IO_APIC */
 182
 183 #define io_apic_assign_pci_irqs 0
 184 #define setup_ioapic_ids_from_mpc x86_init_noop
 185 static const int timer_through_8259 = 0;
 186 static inline void ioapic_and_gsi_init(void) { }
 187 static inline void ioapic_insert_resources(void) { }
 188 #define gsi_top (NR_IRQS_LEGACY)
 189 static inline int mp_find_ioapic(u32 gsi) { return 0; }
 190
 191 struct io_apic_irq_attr;
 192 static inline int io_apic_set_pci_routing(struct device *dev, int irq,
 193                  struct io_apic_irq_attr *irq_attr) { return 0; }
 194
 195 static inline struct IO_APIC_route_entry **alloc_ioapic_entries(void)
 196 {
 197         return NULL;
 198 }
 199
 200 static inline void free_ioapic_entries(struct IO_APIC_route_entry **ent) { }
 201 static inline int save_IO_APIC_setup(struct IO_APIC_route_entry **ent)
 202 {
 203         return -ENOMEM;
 204 }
 205
 206 static inline void mask_IO_APIC_setup(struct IO_APIC_route_entry **ent) { }
 207 static inline int restore_IO_APIC_setup(struct IO_APIC_route_entry **ent)
 208 {
 209         return -ENOMEM;
 210 }
 211
 212 static inline void mp_save_irq(struct mpc_intsrc *m) { };
 213 static inline void disable_ioapic_support(void) { }
 214 #endif
 215
 216 #endif /* _ASM_X86_IO_APIC_H */