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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_IO_APIC_H
2#define _ASM_X86_IO_APIC_H
Thomas Gleixnere1d91972008-01-30 13:30:37 +01003
Akinobu Mitaa1a33fa2008-04-19 23:55:13 +09004#include <linux/types.h>
Thomas Gleixnere1d91972008-01-30 13:30:37 +01005#include <asm/mpspec.h>
6#include <asm/apicdef.h>
Yinghai Lu9d6a4d02008-08-19 20:50:52 -07007#include <asm/irq_vectors.h>
Thomas Gleixnere1d91972008-01-30 13:30:37 +01008
9/*
10 * Intel IO-APIC support for SMP and UP systems.
11 *
12 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
13 */
14
Cyrill Gorcunovd3f020d2008-06-07 19:53:56 +040015/* I/O Unit Redirection Table */
16#define IO_APIC_REDIR_VECTOR_MASK 0x000FF
17#define IO_APIC_REDIR_DEST_LOGICAL 0x00800
18#define IO_APIC_REDIR_DEST_PHYSICAL 0x00000
19#define IO_APIC_REDIR_SEND_PENDING (1 << 12)
20#define IO_APIC_REDIR_REMOTE_IRR (1 << 14)
21#define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
22#define IO_APIC_REDIR_MASKED (1 << 16)
23
Thomas Gleixnere1d91972008-01-30 13:30:37 +010024/*
25 * The structure of the IO-APIC:
26 */
27union IO_APIC_reg_00 {
28 u32 raw;
29 struct {
30 u32 __reserved_2 : 14,
31 LTS : 1,
32 delivery_type : 1,
33 __reserved_1 : 8,
34 ID : 8;
35 } __attribute__ ((packed)) bits;
36};
37
38union IO_APIC_reg_01 {
39 u32 raw;
40 struct {
41 u32 version : 8,
42 __reserved_2 : 7,
43 PRQ : 1,
44 entries : 8,
45 __reserved_1 : 8;
46 } __attribute__ ((packed)) bits;
47};
48
49union IO_APIC_reg_02 {
50 u32 raw;
51 struct {
52 u32 __reserved_2 : 24,
53 arbitration : 4,
54 __reserved_1 : 4;
55 } __attribute__ ((packed)) bits;
56};
57
58union IO_APIC_reg_03 {
59 u32 raw;
60 struct {
61 u32 boot_DT : 1,
62 __reserved_1 : 31;
63 } __attribute__ ((packed)) bits;
64};
65
Thomas Gleixnere1d91972008-01-30 13:30:37 +010066struct IO_APIC_route_entry {
67 __u32 vector : 8,
68 delivery_mode : 3, /* 000: FIXED
69 * 001: lowest prio
70 * 111: ExtINT
71 */
72 dest_mode : 1, /* 0: physical, 1: logical */
73 delivery_status : 1,
74 polarity : 1,
75 irr : 1,
76 trigger : 1, /* 0: edge, 1: level */
77 mask : 1, /* 0: enabled, 1: disabled */
78 __reserved_2 : 15;
79
Thomas Gleixnere1d91972008-01-30 13:30:37 +010080 __u32 __reserved_3 : 24,
81 dest : 8;
Thomas Gleixnere1d91972008-01-30 13:30:37 +010082} __attribute__ ((packed));
83
Suresh Siddha89027d32008-07-10 11:16:56 -070084struct IR_IO_APIC_route_entry {
85 __u64 vector : 8,
86 zero : 3,
87 index2 : 1,
88 delivery_status : 1,
89 polarity : 1,
90 irr : 1,
91 trigger : 1,
92 mask : 1,
93 reserved : 31,
94 format : 1,
95 index : 15;
96} __attribute__ ((packed));
97
Thomas Gleixnerabb00522011-02-23 19:54:53 +010098#define IOAPIC_AUTO -1
99#define IOAPIC_EDGE 0
100#define IOAPIC_LEVEL 1
101
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100102#ifdef CONFIG_X86_IO_APIC
103
104/*
105 * # of IO-APICs and # of IRQ routing registers
106 */
107extern int nr_ioapics;
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100108
Suresh Siddhad5371432011-05-18 16:31:37 -0700109extern int mpc_ioapic_id(int ioapic);
110extern unsigned int mpc_ioapic_addr(int ioapic);
Suresh Siddhac040aae2011-05-18 16:31:38 -0700111extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
Akinobu Mitaa1a33fa2008-04-19 23:55:13 +0900112
Suresh Siddhad5371432011-05-18 16:31:37 -0700113#define MP_MAX_IOAPIC_PIN 127
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100114
115/* # of MP IRQ source entries */
116extern int mp_irq_entries;
117
118/* MP IRQ source entries */
Jaswinder Singh Rajputc2c21742009-01-12 17:47:22 +0530119extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100120
121/* non-0 if default (table-less) MP configuration */
122extern int mpc_default_type;
123
124/* Older SiS APIC requires we rewrite the index register */
125extern int sis_apic_bug;
126
127/* 1 if "noapic" boot option passed */
128extern int skip_ioapic_setup;
129
Ingo Molnar7a9787e2008-10-28 16:26:12 +0100130/* 1 if "noapic" boot option passed */
131extern int noioapicquirk;
132
133/* -1 if "noapic" boot option passed */
134extern int noioapicreroute;
135
Maciej W. Rozycki35542c52008-05-21 22:10:22 +0100136/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
137extern int timer_through_8259;
138
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100139/*
140 * If we use the IO-APIC for IRQ routing, disable automatic
141 * assignment of PCI IRQ's.
142 */
143#define io_apic_assign_pci_irqs \
144 (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
145
Yinghai Lue5198072009-05-15 13:05:16 -0700146struct io_apic_irq_attr;
147extern int io_apic_set_pci_routing(struct device *dev, int irq,
148 struct io_apic_irq_attr *irq_attr);
Yinghai Lu18dce6b2010-02-10 01:20:05 -0800149void setup_IO_APIC_irq_extra(u32 gsi);
Thomas Gleixner23f9b262010-10-15 15:38:50 -0700150extern void ioapic_and_gsi_init(void);
Yinghai Lu857fdc52009-07-10 09:36:20 -0700151extern void ioapic_insert_resources(void);
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100152
Sebastian Andrzej Siewior20443592011-04-27 16:30:52 +0200153int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
Thomas Gleixnerff973d02011-02-23 13:00:56 +0100154
Suresh Siddha31dce142011-05-18 16:31:33 -0700155extern int save_ioapic_entries(void);
156extern void mask_ioapic_entries(void);
157extern int restore_ioapic_entries(void);
Suresh Siddha4dc2f962008-07-10 11:16:47 -0700158
Jeremy Fitzhardinge7b586d72009-02-12 17:22:49 -0800159extern int get_nr_irqs_gsi(void);
Yinghai Lu9d6a4d02008-08-19 20:50:52 -0700160
Thomas Gleixnerde934102009-08-20 09:27:29 +0200161extern void setup_ioapic_ids_from_mpc(void);
Sebastian Andrzej Siewiora38c5382010-11-26 17:50:20 +0100162extern void setup_ioapic_ids_from_mpc_nocheck(void);
Feng Tang2a4ab642009-07-07 23:01:15 -0400163
164struct mp_ioapic_gsi{
Eric W. Biedermaneddb0c52010-03-30 01:07:09 -0700165 u32 gsi_base;
166 u32 gsi_end;
Feng Tang2a4ab642009-07-07 23:01:15 -0400167};
168extern struct mp_ioapic_gsi mp_gsi_routing[];
Eric W. Biedermana4384df2010-06-08 11:44:32 -0700169extern u32 gsi_top;
Eric W. Biedermaneddb0c52010-03-30 01:07:09 -0700170int mp_find_ioapic(u32 gsi);
171int mp_find_ioapic_pin(int ioapic, u32 gsi);
Feng Tang2a4ab642009-07-07 23:01:15 -0400172void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
Jacob Pan05ddafb2009-09-23 07:20:23 -0700173extern void __init pre_init_apic_IRQ0(void);
Feng Tang2a4ab642009-07-07 23:01:15 -0400174
Feng Tang2d8009b2010-11-19 11:33:35 +0800175extern void mp_save_irq(struct mpc_intsrc *m);
176
Henrik Kretzschmar7167d082011-02-22 15:38:05 +0100177extern void disable_ioapic_support(void);
178
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100179#else /* !CONFIG_X86_IO_APIC */
Linus Torvalds78f28b72009-09-18 14:05:47 -0700180
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100181#define io_apic_assign_pci_irqs 0
Thomas Gleixnerde934102009-08-20 09:27:29 +0200182#define setup_ioapic_ids_from_mpc x86_init_noop
Maciej W. Rozycki35542c52008-05-21 22:10:22 +0100183static const int timer_through_8259 = 0;
Thomas Gleixner7fb2b872010-10-24 11:11:22 +0200184static inline void ioapic_and_gsi_init(void) { }
Yinghai Lu857fdc52009-07-10 09:36:20 -0700185static inline void ioapic_insert_resources(void) { }
Eric W. Biedermana4384df2010-06-08 11:44:32 -0700186#define gsi_top (NR_IRQS_LEGACY)
Eric W. Biedermaneddb0c52010-03-30 01:07:09 -0700187static inline int mp_find_ioapic(u32 gsi) { return 0; }
Linus Torvalds78f28b72009-09-18 14:05:47 -0700188
Jacob Pan4966e1a2010-02-23 10:43:58 -0800189struct io_apic_irq_attr;
190static inline int io_apic_set_pci_routing(struct device *dev, int irq,
191 struct io_apic_irq_attr *irq_attr) { return 0; }
Henrik Kretzschmar7d0f1922011-02-22 15:38:06 +0100192
Suresh Siddha31dce142011-05-18 16:31:33 -0700193static inline int save_ioapic_entries(void)
Henrik Kretzschmar7d0f1922011-02-22 15:38:06 +0100194{
195 return -ENOMEM;
196}
197
Suresh Siddha31dce142011-05-18 16:31:33 -0700198static inline void mask_ioapic_entries(void) { }
199static inline int restore_ioapic_entries(void)
Henrik Kretzschmar7d0f1922011-02-22 15:38:06 +0100200{
201 return -ENOMEM;
202}
203
Henrik Kretzschmarb6a14322011-02-22 15:38:04 +0100204static inline void mp_save_irq(struct mpc_intsrc *m) { };
Henrik Kretzschmar7167d082011-02-22 15:38:05 +0100205static inline void disable_ioapic_support(void) { }
Thomas Gleixnere1d91972008-01-30 13:30:37 +0100206#endif
207
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700208#endif /* _ASM_X86_IO_APIC_H */