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 /*
15 * The structure of the IO-APIC:
16 */
17 union 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
28 union 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
39 union 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
48 union IO_APIC_reg_03 {
49 u32 raw;
50 struct {
51 u32 boot_DT : 1,
52 __reserved_1 : 31;
53 } __attribute__ ((packed)) bits;
54 };
55
56 enum 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
67 struct 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 union { struct { __u32
82 __reserved_1 : 24,
83 physical_dest : 4,
84 __reserved_2 : 4;
85 } physical;
86
87 struct { __u32
88 __reserved_1 : 24,
89 logical_dest : 8;
90 } logical;
91 } dest;
92
93 } __attribute__ ((packed));
94
95 #ifdef CONFIG_X86_IO_APIC
96
97 /*
98 * # of IO-APICs and # of IRQ routing registers
99 */
100 extern int nr_ioapics;
101 extern int nr_ioapic_registers[MAX_IO_APICS];
102
103 /*
104 * MP-BIOS irq configuration table structures:
105 */
106
107 /* I/O APIC entries */
108 extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
109
110 /* # of MP IRQ source entries */
111 extern int mp_irq_entries;
112
113 /* MP IRQ source entries */
114 extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
115
116 /* non-0 if default (table-less) MP configuration */
117 extern int mpc_default_type;
118
119 /* Older SiS APIC requires we rewrite the index register */
120 extern int sis_apic_bug;
121
122 /* 1 if "noapic" boot option passed */
123 extern int skip_ioapic_setup;
124
disable_ioapic_setup(void)125 static inline void disable_ioapic_setup(void)
126 {
127 skip_ioapic_setup = 1;
128 }
129
ioapic_setup_disabled(void)130 static inline int ioapic_setup_disabled(void)
131 {
132 return skip_ioapic_setup;
133 }
134
135 /*
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
141 #ifdef CONFIG_ACPI
142 extern int io_apic_get_unique_id (int ioapic, int apic_id);
143 extern int io_apic_get_version (int ioapic);
144 extern int io_apic_get_redir_entries (int ioapic);
145 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
146 extern int timer_uses_ioapic_pin_0;
147 #endif /* CONFIG_ACPI */
148
149 extern int (*ioapic_renumber_irq)(int ioapic, int irq);
150
151 #else /* !CONFIG_X86_IO_APIC */
152 #define io_apic_assign_pci_irqs 0
153 #endif
154
155 #endif
156