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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_IO_APIC_H
2#define __ASM_IO_APIC_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <asm/types.h>
5#include <asm/mpspec.h>
Jean Delvare58a53b22007-03-05 00:30:06 -08006#include <asm/apicdef.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8/*
9 * Intel IO-APIC support for SMP and UP systems.
10 *
11 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
12 */
13
14#ifdef CONFIG_X86_IO_APIC
15
Linus Torvalds1da177e2005-04-16 15:20:36 -070016/*
17 * The structure of the IO-APIC:
18 */
19union IO_APIC_reg_00 {
20 u32 raw;
21 struct {
22 u32 __reserved_2 : 14,
23 LTS : 1,
24 delivery_type : 1,
25 __reserved_1 : 8,
26 ID : 8;
27 } __attribute__ ((packed)) bits;
28};
29
30union IO_APIC_reg_01 {
31 u32 raw;
32 struct {
33 u32 version : 8,
34 __reserved_2 : 7,
35 PRQ : 1,
36 entries : 8,
37 __reserved_1 : 8;
38 } __attribute__ ((packed)) bits;
39};
40
41union IO_APIC_reg_02 {
42 u32 raw;
43 struct {
44 u32 __reserved_2 : 24,
45 arbitration : 4,
46 __reserved_1 : 4;
47 } __attribute__ ((packed)) bits;
48};
49
50union IO_APIC_reg_03 {
51 u32 raw;
52 struct {
53 u32 boot_DT : 1,
54 __reserved_1 : 31;
55 } __attribute__ ((packed)) bits;
56};
57
58/*
59 * # of IO-APICs and # of IRQ routing registers
60 */
61extern int nr_ioapics;
62extern int nr_ioapic_registers[MAX_IO_APICS];
63
64enum ioapic_irq_destination_types {
65 dest_Fixed = 0,
66 dest_LowestPrio = 1,
67 dest_SMI = 2,
68 dest__reserved_1 = 3,
69 dest_NMI = 4,
70 dest_INIT = 5,
71 dest__reserved_2 = 6,
72 dest_ExtINT = 7
73};
74
75struct IO_APIC_route_entry {
76 __u32 vector : 8,
77 delivery_mode : 3, /* 000: FIXED
78 * 001: lowest prio
79 * 111: ExtINT
80 */
81 dest_mode : 1, /* 0: physical, 1: logical */
82 delivery_status : 1,
83 polarity : 1,
84 irr : 1,
85 trigger : 1, /* 0: edge, 1: level */
86 mask : 1, /* 0: enabled, 1: disabled */
87 __reserved_2 : 15;
88
89 union { struct { __u32
90 __reserved_1 : 24,
91 physical_dest : 4,
92 __reserved_2 : 4;
93 } physical;
94
95 struct { __u32
96 __reserved_1 : 24,
97 logical_dest : 8;
98 } logical;
99 } dest;
100
101} __attribute__ ((packed));
102
103/*
104 * MP-BIOS irq configuration table structures:
105 */
106
107/* I/O APIC entries */
108extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
109
110/* # of MP IRQ source entries */
111extern int mp_irq_entries;
112
113/* MP IRQ source entries */
114extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
115
116/* non-0 if default (table-less) MP configuration */
117extern int mpc_default_type;
118
Linus Torvalds130fe052006-11-01 09:11:00 -0800119/* Older SiS APIC requires we rewrite the index register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120extern int sis_apic_bug;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/* 1 if "noapic" boot option passed */
123extern int skip_ioapic_setup;
124
Rusty Russell1a3f2392006-09-26 10:52:32 +0200125static inline void disable_ioapic_setup(void)
126{
127 skip_ioapic_setup = 1;
128}
129
130static inline int ioapic_setup_disabled(void)
131{
132 return skip_ioapic_setup;
133}
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135/*
136 * If we use the IO-APIC for IRQ routing, disable automatic
137 * assignment of PCI IRQ's.
138 */
139#define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
140
Len Brown888ba6c2005-08-24 12:07:20 -0400141#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142extern int io_apic_get_unique_id (int ioapic, int apic_id);
143extern int io_apic_get_version (int ioapic);
144extern int io_apic_get_redir_entries (int ioapic);
145extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
Kimball Murraye0c1e9b2006-05-08 15:17:16 +0200146extern int timer_uses_ioapic_pin_0;
Len Brown888ba6c2005-08-24 12:07:20 -0400147#endif /* CONFIG_ACPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149extern int (*ioapic_renumber_irq)(int ioapic, int irq);
150
151#else /* !CONFIG_X86_IO_APIC */
152#define io_apic_assign_pci_irqs 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153#endif
154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155#endif