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 */ 27union 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 38union 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 49union 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 58union IO_APIC_reg_03 { 59 u32 raw; 60 struct { 61 u32 boot_DT : 1, 62 __reserved_1 : 31; 63 } __attribute__ ((packed)) bits; 64}; 65 66struct 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 84struct 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 98struct irq_alloc_info; 99struct ioapic_domain_cfg; 100 101#define IOAPIC_AUTO -1 102#define IOAPIC_EDGE 0 103#define IOAPIC_LEVEL 1 104 105#define IOAPIC_MASKED 1 106#define IOAPIC_UNMASKED 0 107 108#define IOAPIC_POL_HIGH 0 109#define IOAPIC_POL_LOW 1 110 111#define IOAPIC_DEST_MODE_PHYSICAL 0 112#define IOAPIC_DEST_MODE_LOGICAL 1 113 114#define IOAPIC_MAP_ALLOC 0x1 115#define IOAPIC_MAP_CHECK 0x2 116 117#ifdef CONFIG_X86_IO_APIC 118 119/* 120 * # of IO-APICs and # of IRQ routing registers 121 */ 122extern int nr_ioapics; 123 124extern int mpc_ioapic_id(int ioapic); 125extern unsigned int mpc_ioapic_addr(int ioapic); 126 127/* # of MP IRQ source entries */ 128extern int mp_irq_entries; 129 130/* MP IRQ source entries */ 131extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES]; 132 133/* 1 if "noapic" boot option passed */ 134extern int skip_ioapic_setup; 135 136/* 1 if "noapic" boot option passed */ 137extern int noioapicquirk; 138 139/* -1 if "noapic" boot option passed */ 140extern int noioapicreroute; 141 142extern u32 gsi_top; 143 144extern unsigned long io_apic_irqs; 145 146#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs)) 147 148/* 149 * If we use the IO-APIC for IRQ routing, disable automatic 150 * assignment of PCI IRQ's. 151 */ 152#define io_apic_assign_pci_irqs \ 153 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs) 154 155struct irq_cfg; 156extern void ioapic_insert_resources(void); 157extern int arch_early_ioapic_init(void); 158 159extern int save_ioapic_entries(void); 160extern void mask_ioapic_entries(void); 161extern int restore_ioapic_entries(void); 162 163extern void setup_ioapic_ids_from_mpc(void); 164extern void setup_ioapic_ids_from_mpc_nocheck(void); 165 166extern int mp_find_ioapic(u32 gsi); 167extern int mp_find_ioapic_pin(int ioapic, u32 gsi); 168extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, 169 struct irq_alloc_info *info); 170extern void mp_unmap_irq(int irq); 171extern int mp_register_ioapic(int id, u32 address, u32 gsi_base, 172 struct ioapic_domain_cfg *cfg); 173extern int mp_unregister_ioapic(u32 gsi_base); 174extern int mp_ioapic_registered(u32 gsi_base); 175 176extern void ioapic_set_alloc_attr(struct irq_alloc_info *info, 177 int node, int trigger, int polarity); 178 179extern void mp_save_irq(struct mpc_intsrc *m); 180 181extern void disable_ioapic_support(void); 182 183extern void __init io_apic_init_mappings(void); 184extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg); 185extern void native_disable_io_apic(void); 186 187static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) 188{ 189 return x86_io_apic_ops.read(apic, reg); 190} 191 192extern void setup_IO_APIC(void); 193extern void enable_IO_APIC(void); 194extern void disable_IO_APIC(void); 195extern void setup_ioapic_dest(void); 196extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin); 197extern void print_IO_APICs(void); 198#else /* !CONFIG_X86_IO_APIC */ 199 200#define IO_APIC_IRQ(x) 0 201#define io_apic_assign_pci_irqs 0 202#define setup_ioapic_ids_from_mpc x86_init_noop 203static inline void ioapic_insert_resources(void) { } 204static inline int arch_early_ioapic_init(void) { return 0; } 205static inline void print_IO_APICs(void) {} 206#define gsi_top (NR_IRQS_LEGACY) 207static inline int mp_find_ioapic(u32 gsi) { return 0; } 208static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, 209 struct irq_alloc_info *info) 210{ 211 return gsi; 212} 213 214static inline void mp_unmap_irq(int irq) { } 215 216static inline int save_ioapic_entries(void) 217{ 218 return -ENOMEM; 219} 220 221static inline void mask_ioapic_entries(void) { } 222static inline int restore_ioapic_entries(void) 223{ 224 return -ENOMEM; 225} 226 227static inline void mp_save_irq(struct mpc_intsrc *m) { } 228static inline void disable_ioapic_support(void) { } 229static inline void io_apic_init_mappings(void) { } 230#define native_io_apic_read NULL 231#define native_disable_io_apic NULL 232 233static inline void setup_IO_APIC(void) { } 234static inline void enable_IO_APIC(void) { } 235static inline void setup_ioapic_dest(void) { } 236 237#endif 238 239#endif /* _ASM_X86_IO_APIC_H */ 240