1#ifndef __ASM_IO_APIC_H
2#define __ASM_IO_APIC_H
3
4#include <asm/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#define APIC_MISMATCH_DEBUG
15
16/*
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	__u32	__reserved_3	: 24,
90		dest		:  8;
91} __attribute__ ((packed));
92
93/*
94 * MP-BIOS irq configuration table structures:
95 */
96
97/* I/O APIC entries */
98extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
99
100/* # of MP IRQ source entries */
101extern int mp_irq_entries;
102
103/* MP IRQ source entries */
104extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
105
106/* non-0 if default (table-less) MP configuration */
107extern int mpc_default_type;
108
109/* 1 if "noapic" boot option passed */
110extern int skip_ioapic_setup;
111
112/*
113 * If we use the IO-APIC for IRQ routing, disable automatic
114 * assignment of PCI IRQ's.
115 */
116#define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
117
118#ifdef CONFIG_ACPI
119extern int io_apic_get_version (int ioapic);
120extern int io_apic_get_redir_entries (int ioapic);
121extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
122#endif
123
124extern int sis_apic_bug; /* dummy */
125
126void enable_NMI_through_LVT0 (void * dummy);
127
128extern spinlock_t i8259A_lock;
129
130#endif
131