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 */ 229