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Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_IO_APIC_H
2#define __ASM_IO_APIC_H
3
4#include <asm/types.h>
5#include <asm/mpspec.h>
6
7/*
8 * Intel IO-APIC support for SMP and UP systems.
9 *
10 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
11 */
12
13#define APIC_MISMATCH_DEBUG
14
15/*
16 * The structure of the IO-APIC:
17 */
18union IO_APIC_reg_00 {
19 u32 raw;
20 struct {
21 u32 __reserved_2 : 14,
22 LTS : 1,
23 delivery_type : 1,
24 __reserved_1 : 8,
25 ID : 8;
26 } __attribute__ ((packed)) bits;
27};
28
29union IO_APIC_reg_01 {
30 u32 raw;
31 struct {
32 u32 version : 8,
33 __reserved_2 : 7,
34 PRQ : 1,
35 entries : 8,
36 __reserved_1 : 8;
37 } __attribute__ ((packed)) bits;
38};
39
40union IO_APIC_reg_02 {
41 u32 raw;
42 struct {
43 u32 __reserved_2 : 24,
44 arbitration : 4,
45 __reserved_1 : 4;
46 } __attribute__ ((packed)) bits;
47};
48
49union IO_APIC_reg_03 {
50 u32 raw;
51 struct {
52 u32 boot_DT : 1,
53 __reserved_1 : 31;
54 } __attribute__ ((packed)) bits;
55};
56
57/*
58 * # of IO-APICs and # of IRQ routing registers
59 */
60extern int nr_ioapics;
61extern int nr_ioapic_registers[MAX_IO_APICS];
62
63enum ioapic_irq_destination_types {
64 dest_Fixed = 0,
65 dest_LowestPrio = 1,
66 dest_SMI = 2,
67 dest__reserved_1 = 3,
68 dest_NMI = 4,
69 dest_INIT = 5,
70 dest__reserved_2 = 6,
71 dest_ExtINT = 7
72};
73
74struct IO_APIC_route_entry {
75 __u32 vector : 8,
76 delivery_mode : 3, /* 000: FIXED
77 * 001: lowest prio
78 * 111: ExtINT
79 */
80 dest_mode : 1, /* 0: physical, 1: logical */
81 delivery_status : 1,
82 polarity : 1,
83 irr : 1,
84 trigger : 1, /* 0: edge, 1: level */
85 mask : 1, /* 0: enabled, 1: disabled */
86 __reserved_2 : 15;
87
88 __u32 __reserved_3 : 24,
89 dest : 8;
90} __attribute__ ((packed));
91
92/*
93 * MP-BIOS irq configuration table structures:
94 */
95
96/* I/O APIC entries */
97extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
98
99/* # of MP IRQ source entries */
100extern int mp_irq_entries;
101
102/* MP IRQ source entries */
103extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
104
105/* non-0 if default (table-less) MP configuration */
106extern int mpc_default_type;
107
108/* 1 if "noapic" boot option passed */
109extern int skip_ioapic_setup;
110
111/*
112 * If we use the IO-APIC for IRQ routing, disable automatic
113 * assignment of PCI IRQ's.
114 */
115#define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
116
117#ifdef CONFIG_ACPI
118extern int io_apic_get_version (int ioapic);
119extern int io_apic_get_redir_entries (int ioapic);
120extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
121#endif
122
123extern int sis_apic_bug; /* dummy */
124
125void enable_NMI_through_LVT0 (void * dummy);
126
127extern spinlock_t i8259A_lock;
128
129#endif