summaryrefslogtreecommitdiffstats
path: root/include/asm-i386/io_apic.h
blob: 51c4e5fe6062d0e239f257521804d342f008b33e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
#ifndef __ASM_IO_APIC_H
#define __ASM_IO_APIC_H

#include <linux/config.h>
#include <asm/types.h>
#include <asm/mpspec.h>

/*
 * Intel IO-APIC support for SMP and UP systems.
 *
 * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
 */

#ifdef CONFIG_X86_IO_APIC

#ifdef CONFIG_PCI_MSI
static inline int use_pci_vector(void)	{return 1;}
static inline void disable_edge_ioapic_vector(unsigned int vector) { }
static inline void mask_and_ack_level_ioapic_vector(unsigned int vector) { }
static inline void end_edge_ioapic_vector (unsigned int vector) { }
#define startup_level_ioapic	startup_level_ioapic_vector
#define shutdown_level_ioapic	mask_IO_APIC_vector
#define enable_level_ioapic	unmask_IO_APIC_vector
#define disable_level_ioapic	mask_IO_APIC_vector
#define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_vector
#define end_level_ioapic	end_level_ioapic_vector
#define set_ioapic_affinity	set_ioapic_affinity_vector

#define startup_edge_ioapic 	startup_edge_ioapic_vector
#define shutdown_edge_ioapic 	disable_edge_ioapic_vector
#define enable_edge_ioapic 	unmask_IO_APIC_vector
#define disable_edge_ioapic 	disable_edge_ioapic_vector
#define ack_edge_ioapic 	ack_edge_ioapic_vector
#define end_edge_ioapic 	end_edge_ioapic_vector
#else
static inline int use_pci_vector(void)	{return 0;}
static inline void disable_edge_ioapic_irq(unsigned int irq) { }
static inline void mask_and_ack_level_ioapic_irq(unsigned int irq) { }
static inline void end_edge_ioapic_irq (unsigned int irq) { }
#define startup_level_ioapic	startup_level_ioapic_irq
#define shutdown_level_ioapic	mask_IO_APIC_irq
#define enable_level_ioapic	unmask_IO_APIC_irq
#define disable_level_ioapic	mask_IO_APIC_irq
#define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_irq
#define end_level_ioapic	end_level_ioapic_irq
#define set_ioapic_affinity	set_ioapic_affinity_irq

#define startup_edge_ioapic 	startup_edge_ioapic_irq
#define shutdown_edge_ioapic 	disable_edge_ioapic_irq
#define enable_edge_ioapic 	unmask_IO_APIC_irq
#define disable_edge_ioapic 	disable_edge_ioapic_irq
#define ack_edge_ioapic 	ack_edge_ioapic_irq
#define end_edge_ioapic 	end_edge_ioapic_irq
#endif

#define IO_APIC_BASE(idx) \
		((volatile int *)(__fix_to_virt(FIX_IO_APIC_BASE_0 + idx) \
		+ (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK)))

/*
 * The structure of the IO-APIC:
 */
union IO_APIC_reg_00 {
	u32	raw;
	struct {
		u32	__reserved_2	: 14,
			LTS		:  1,
			delivery_type	:  1,
			__reserved_1	:  8,
			ID		:  8;
	} __attribute__ ((packed)) bits;
};

union IO_APIC_reg_01 {
	u32	raw;
	struct {
		u32	version		:  8,
			__reserved_2	:  7,
			PRQ		:  1,
			entries		:  8,
			__reserved_1	:  8;
	} __attribute__ ((packed)) bits;
};

union IO_APIC_reg_02 {
	u32	raw;
	struct {
		u32	__reserved_2	: 24,
			arbitration	:  4,
			__reserved_1	:  4;
	} __attribute__ ((packed)) bits;
};

union IO_APIC_reg_03 {
	u32	raw;
	struct {
		u32	boot_DT		:  1,
			__reserved_1	: 31;
	} __attribute__ ((packed)) bits;
};

/*
 * # of IO-APICs and # of IRQ routing registers
 */
extern int nr_ioapics;
extern int nr_ioapic_registers[MAX_IO_APICS];

enum ioapic_irq_destination_types {
	dest_Fixed = 0,
	dest_LowestPrio = 1,
	dest_SMI = 2,
	dest__reserved_1 = 3,
	dest_NMI = 4,
	dest_INIT = 5,
	dest__reserved_2 = 6,
	dest_ExtINT = 7
};

struct IO_APIC_route_entry {
	__u32	vector		:  8,
		delivery_mode	:  3,	/* 000: FIXED
					 * 001: lowest prio
					 * 111: ExtINT
					 */
		dest_mode	:  1,	/* 0: physical, 1: logical */
		delivery_status	:  1,
		polarity	:  1,
		irr		:  1,
		trigger		:  1,	/* 0: edge, 1: level */
		mask		:  1,	/* 0: enabled, 1: disabled */
		__reserved_2	: 15;

	union {		struct { __u32
					__reserved_1	: 24,
					physical_dest	:  4,
					__reserved_2	:  4;
			} physical;

			struct { __u32
					__reserved_1	: 24,
					logical_dest	:  8;
			} logical;
	} dest;

} __attribute__ ((packed));

/*
 * MP-BIOS irq configuration table structures:
 */

/* I/O APIC entries */
extern struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];

/* # of MP IRQ source entries */
extern int mp_irq_entries;

/* MP IRQ source entries */
extern struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];

/* non-0 if default (table-less) MP configuration */
extern int mpc_default_type;

static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
	*IO_APIC_BASE(apic) = reg;
	return *(IO_APIC_BASE(apic)+4);
}

static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
	*IO_APIC_BASE(apic) = reg;
	*(IO_APIC_BASE(apic)+4) = value;
}

/*
 * Re-write a value: to be used for read-modify-write
 * cycles where the read already set up the index register.
 *
 * Older SiS APIC requires we rewrite the index regiser
 */
extern int sis_apic_bug;
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
	if (sis_apic_bug)
		*IO_APIC_BASE(apic) = reg;
	*(IO_APIC_BASE(apic)+4) = value;
}

/* 1 if "noapic" boot option passed */
extern int skip_ioapic_setup;

/*
 * If we use the IO-APIC for IRQ routing, disable automatic
 * assignment of PCI IRQ's.
 */
#define io_apic_assign_pci_irqs (mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)

#ifdef CONFIG_ACPI
extern int io_apic_get_unique_id (int ioapic, int apic_id);
extern int io_apic_get_version (int ioapic);
extern int io_apic_get_redir_entries (int ioapic);
extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
#endif /* CONFIG_ACPI */

extern int (*ioapic_renumber_irq)(int ioapic, int irq);

#else  /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0
#endif

extern int assign_irq_vector(int irq);

#endif
OpenPOWER on IntegriCloud