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 */ 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 66enum 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 77struct 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 95struct 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 */ 114extern int nr_ioapics; 115extern int nr_ioapic_registers[MAX_IO_APICS]; 116 117#define MP_MAX_IOAPIC_PIN 127 118 119/* I/O APIC entries */ 120extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS]; 121 122/* # of MP IRQ source entries */ 123extern int mp_irq_entries; 124 125/* MP IRQ source entries */ 126extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES]; 127 128/* non-0 if default (table-less) MP configuration */ 129extern int mpc_default_type; 130 131/* Older SiS APIC requires we rewrite the index register */ 132extern int sis_apic_bug; 133 134/* 1 if "noapic" boot option passed */ 135extern int skip_ioapic_setup; 136 137/* 1 if "noapic" boot option passed */ 138extern int noioapicquirk; 139 140/* -1 if "noapic" boot option passed */ 141extern int noioapicreroute; 142 143/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */ 144extern int timer_through_8259; 145 146/* 147 * If we use the IO-APIC for IRQ routing, disable automatic 148 * assignment of PCI IRQ's. 149 */ 150#define io_apic_assign_pci_irqs \ 151 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs) 152 153extern u8 io_apic_unique_id(u8 id); 154extern int io_apic_get_unique_id(int ioapic, int apic_id); 155extern int io_apic_get_version(int ioapic); 156extern int io_apic_get_redir_entries(int ioapic); 157 158struct io_apic_irq_attr; 159extern int io_apic_set_pci_routing(struct device *dev, int irq, 160 struct io_apic_irq_attr *irq_attr); 161void setup_IO_APIC_irq_extra(u32 gsi); 162extern void ioapic_init_mappings(void); 163extern void ioapic_insert_resources(void); 164 165extern struct IO_APIC_route_entry **alloc_ioapic_entries(void); 166extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries); 167extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries); 168extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries); 169extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries); 170 171extern void probe_nr_irqs_gsi(void); 172 173extern int setup_ioapic_entry(int apic, int irq, 174 struct IO_APIC_route_entry *entry, 175 unsigned int destination, int trigger, 176 int polarity, int vector, int pin); 177extern void ioapic_write_entry(int apic, int pin, 178 struct IO_APIC_route_entry e); 179extern void setup_ioapic_ids_from_mpc(void); 180 181struct mp_ioapic_gsi{ 182 u32 gsi_base; 183 u32 gsi_end; 184}; 185extern struct mp_ioapic_gsi mp_gsi_routing[]; 186extern u32 gsi_top; 187int mp_find_ioapic(u32 gsi); 188int mp_find_ioapic_pin(int ioapic, u32 gsi); 189void __init mp_register_ioapic(int id, u32 address, u32 gsi_base); 190extern void __init pre_init_apic_IRQ0(void); 191 192#else /* !CONFIG_X86_IO_APIC */ 193 194#define io_apic_assign_pci_irqs 0 195#define setup_ioapic_ids_from_mpc x86_init_noop 196static const int timer_through_8259 = 0; 197static inline void ioapic_init_mappings(void) { } 198static inline void ioapic_insert_resources(void) { } 199static inline void probe_nr_irqs_gsi(void) { } 200#define gsi_top (NR_IRQS_LEGACY) 201static inline int mp_find_ioapic(u32 gsi) { return 0; } 202 203struct io_apic_irq_attr; 204static inline int io_apic_set_pci_routing(struct device *dev, int irq, 205 struct io_apic_irq_attr *irq_attr) { return 0; } 206#endif 207 208#endif /* _ASM_X86_IO_APIC_H */ 209