include/asm-x86/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 enum ioapic_irq_destination_types {
  67         dest_Fixed = 0,
  68         dest_LowestPrio = 1,
  69         dest_SMI = 2,
  70         dest__reserved_1 = 3,
  71         dest_NMI = 4,
  72         dest_INIT = 5,
  73         dest__reserved_2 = 6,
  74         dest_ExtINT = 7
  75 };
  76
  77 struct IO_APIC_route_entry {
  78         __u32   vector          :  8,
  79                 delivery_mode   :  3,   /* 000: FIXED
  80                                          * 001: lowest prio
  81                                          * 111: ExtINT
  82                                          */
  83                 dest_mode       :  1,   /* 0: physical, 1: logical */
  84                 delivery_status :  1,
  85                 polarity        :  1,
  86                 irr             :  1,
  87                 trigger         :  1,   /* 0: edge, 1: level */
  88                 mask            :  1,   /* 0: enabled, 1: disabled */
  89                 __reserved_2    : 15;
  90
  91         __u32   __reserved_3    : 24,
  92                 dest            :  8;
  93 } __attribute__ ((packed));
  94
  95 struct IR_IO_APIC_route_entry {
  96         __u64   vector          : 8,
  97                 zero            : 3,
  98                 index2          : 1,
  99                 delivery_status : 1,
 100                 polarity        : 1,
 101                 irr             : 1,
 102                 trigger         : 1,
 103                 mask            : 1,
 104                 reserved        : 31,
 105                 format          : 1,
 106                 index           : 15;
 107 } __attribute__ ((packed));
 108
 109 #ifdef CONFIG_X86_IO_APIC
 110
 111 /*
 112  * # of IO-APICs and # of IRQ routing registers
 113  */
 114 extern int nr_ioapics;
 115 extern int nr_ioapic_registers[MAX_IO_APICS];
 116
 117 /*
 118  * MP-BIOS irq configuration table structures:
 119  */
 120
 121 #define MP_MAX_IOAPIC_PIN 127
 122
 123 struct mp_config_ioapic {
 124         unsigned long mp_apicaddr;
 125         unsigned int mp_apicid;
 126         unsigned char mp_type;
 127         unsigned char mp_apicver;
 128         unsigned char mp_flags;
 129 };
 130
 131 struct mp_config_intsrc {
 132         unsigned int mp_dstapic;
 133         unsigned char mp_type;
 134         unsigned char mp_irqtype;
 135         unsigned short mp_irqflag;
 136         unsigned char mp_srcbus;
 137         unsigned char mp_srcbusirq;
 138         unsigned char mp_dstirq;
 139 };
 140
 141 /* I/O APIC entries */
 142 extern struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
 143
 144 /* # of MP IRQ source entries */
 145 extern int mp_irq_entries;
 146
 147 /* MP IRQ source entries */
 148 extern struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
 149
 150 /* non-0 if default (table-less) MP configuration */
 151 extern int mpc_default_type;
 152
 153 /* Older SiS APIC requires we rewrite the index register */
 154 extern int sis_apic_bug;
 155
 156 /* 1 if "noapic" boot option passed */
 157 extern int skip_ioapic_setup;
 158
 159 /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
 160 extern int timer_through_8259;
 161
 162 static inline void disable_ioapic_setup(void)
 163 {
 164         skip_ioapic_setup = 1;
 165 }
 166
 167 /*
 168  * If we use the IO-APIC for IRQ routing, disable automatic
 169  * assignment of PCI IRQ's.
 170  */
 171 #define io_apic_assign_pci_irqs \
 172         (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
 173
 174 #ifdef CONFIG_ACPI
 175 extern int io_apic_get_unique_id(int ioapic, int apic_id);
 176 extern int io_apic_get_version(int ioapic);
 177 extern int io_apic_get_redir_entries(int ioapic);
 178 extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
 179                                    int edge_level, int active_high_low);
 180 #endif /* CONFIG_ACPI */
 181
 182 extern int (*ioapic_renumber_irq)(int ioapic, int irq);
 183 extern void ioapic_init_mappings(void);
 184
 185 #ifdef CONFIG_X86_64
 186 extern int save_mask_IO_APIC_setup(void);
 187 extern void restore_IO_APIC_setup(void);
 188 extern void reinit_intr_remapped_IO_APIC(int);
 189 #endif
 190
 191 extern int probe_nr_irqs(void);
 192
 193 #else  /* !CONFIG_X86_IO_APIC */
 194 #define io_apic_assign_pci_irqs 0
 195 static const int timer_through_8259 = 0;
 196 static inline void ioapic_init_mappings(void) { }
 197
 198 static inline int probe_nr_irqs(void)
 199 {
 200         return NR_IRQS;
 201 }
 202 #endif
 203
 204 #endif /* ASM_X86__IO_APIC_H */