i2c/vt8231: Remove superfluous initialization
[linux-2.6/mini2440.git] / include / asm-x86_64 / io_apic.h
blob561ecbfd4cb5604bce14e7ed2fc51848dbcae244
1 #ifndef __ASM_IO_APIC_H
2 #define __ASM_IO_APIC_H
4 #include <asm/types.h>
5 #include <asm/mpspec.h>
7 /*
8 * Intel IO-APIC support for SMP and UP systems.
10 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
13 #define APIC_MISMATCH_DEBUG
16 * The structure of the IO-APIC:
18 union 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;
29 union 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;
40 union 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;
49 union IO_APIC_reg_03 {
50 u32 raw;
51 struct {
52 u32 boot_DT : 1,
53 __reserved_1 : 31;
54 } __attribute__ ((packed)) bits;
58 * # of IO-APICs and # of IRQ routing registers
60 extern int nr_ioapics;
61 extern int nr_ioapic_registers[MAX_IO_APICS];
63 enum 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
74 struct IO_APIC_route_entry {
75 __u32 vector : 8,
76 delivery_mode : 3, /* 000: FIXED
77 * 001: lowest prio
78 * 111: ExtINT
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;
88 union { struct { __u32
89 __reserved_1 : 24,
90 physical_dest : 4,
91 __reserved_2 : 4;
92 } physical;
94 struct { __u32
95 __reserved_1 : 24,
96 logical_dest : 8;
97 } logical;
98 } dest;
100 } __attribute__ ((packed));
103 * MP-BIOS irq configuration table structures:
106 /* I/O APIC entries */
107 extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
109 /* # of MP IRQ source entries */
110 extern int mp_irq_entries;
112 /* MP IRQ source entries */
113 extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
115 /* non-0 if default (table-less) MP configuration */
116 extern int mpc_default_type;
118 /* 1 if "noapic" boot option passed */
119 extern int skip_ioapic_setup;
122 * If we use the IO-APIC for IRQ routing, disable automatic
123 * assignment of PCI IRQ's.
125 #define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
127 #ifdef CONFIG_ACPI
128 extern int io_apic_get_version (int ioapic);
129 extern int io_apic_get_redir_entries (int ioapic);
130 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
131 #endif
133 extern int sis_apic_bug; /* dummy */
135 void enable_NMI_through_LVT0 (void * dummy);
137 extern spinlock_t i8259A_lock;
139 #endif