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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 <linux/types.h>
5#include <asm/mpspec.h>
6#include <asm/apicdef.h>
7
8/*
9 * Intel IO-APIC support for SMP and UP systems.
10 *
11 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
12 */
13
14/*
15 * The structure of the IO-APIC:
16 */
17union IO_APIC_reg_00 {
18 u32 raw;
19 struct {
20 u32 __reserved_2 : 14,
21 LTS : 1,
22 delivery_type : 1,
23 __reserved_1 : 8,
24 ID : 8;
25 } __attribute__ ((packed)) bits;
26};
27
28union IO_APIC_reg_01 {
29 u32 raw;
30 struct {
31 u32 version : 8,
32 __reserved_2 : 7,
33 PRQ : 1,
34 entries : 8,
35 __reserved_1 : 8;
36 } __attribute__ ((packed)) bits;
37};
38
39union IO_APIC_reg_02 {
40 u32 raw;
41 struct {
42 u32 __reserved_2 : 24,
43 arbitration : 4,
44 __reserved_1 : 4;
45 } __attribute__ ((packed)) bits;
46};
47
48union IO_APIC_reg_03 {
49 u32 raw;
50 struct {
51 u32 boot_DT : 1,
52 __reserved_1 : 31;
53 } __attribute__ ((packed)) bits;
54};
55
56enum ioapic_irq_destination_types {
57 dest_Fixed = 0,
58 dest_LowestPrio = 1,
59 dest_SMI = 2,
60 dest__reserved_1 = 3,
61 dest_NMI = 4,
62 dest_INIT = 5,
63 dest__reserved_2 = 6,
64 dest_ExtINT = 7
65};
66
67struct IO_APIC_route_entry {
68 __u32 vector : 8,
69 delivery_mode : 3, /* 000: FIXED
70 * 001: lowest prio
71 * 111: ExtINT
72 */
73 dest_mode : 1, /* 0: physical, 1: logical */
74 delivery_status : 1,
75 polarity : 1,
76 irr : 1,
77 trigger : 1, /* 0: edge, 1: level */
78 mask : 1, /* 0: enabled, 1: disabled */
79 __reserved_2 : 15;
80
81#ifdef CONFIG_X86_32
82 union {
83 struct {
84 __u32 __reserved_1 : 24,
85 physical_dest : 4,
86 __reserved_2 : 4;
87 } physical;
88
89 struct {
90 __u32 __reserved_1 : 24,
91 logical_dest : 8;
92 } logical;
93 } dest;
94#else
95 __u32 __reserved_3 : 24,
96 dest : 8;
97#endif
98
99} __attribute__ ((packed));
100
101#ifdef CONFIG_X86_IO_APIC
102
103/*
104 * # of IO-APICs and # of IRQ routing registers
105 */
106extern int nr_ioapics;
107extern int nr_ioapic_registers[MAX_IO_APICS];
108
109/*
110 * MP-BIOS irq configuration table structures:
111 */
112
113#define MP_MAX_IOAPIC_PIN 127
114
115struct mp_ioapic_routing {
116 int apic_id;
117 int gsi_base;
118 int gsi_end;
119 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
120};
121
122/* I/O APIC entries */
123extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
124
125/* # of MP IRQ source entries */
126extern int mp_irq_entries;
127
128/* MP IRQ source entries */
129extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
130
131/* non-0 if default (table-less) MP configuration */
132extern int mpc_default_type;
133
134/* Older SiS APIC requires we rewrite the index register */
135extern int sis_apic_bug;
136
137/* 1 if "noapic" boot option passed */
138extern int skip_ioapic_setup;
139
140static inline void disable_ioapic_setup(void)
141{
142 skip_ioapic_setup = 1;
143}
144
145/*
146 * If we use the IO-APIC for IRQ routing, disable automatic
147 * assignment of PCI IRQ's.
148 */
149#define io_apic_assign_pci_irqs \
150 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
151
152#ifdef CONFIG_ACPI
153extern int io_apic_get_unique_id(int ioapic, int apic_id);
154extern int io_apic_get_version(int ioapic);
155extern int io_apic_get_redir_entries(int ioapic);
156extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
157 int edge_level, int active_high_low);
158#endif /* CONFIG_ACPI */
159
160extern int (*ioapic_renumber_irq)(int ioapic, int irq);
161extern void ioapic_init_mappings(void);
162
163#else /* !CONFIG_X86_IO_APIC */
164#define io_apic_assign_pci_irqs 0
165#endif
166
167#endif