aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-x86/hw_irq_64.h
blob: a470d59da67832e0b8265b55f318705134435023 (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
#ifndef _ASM_HW_IRQ_H
#define _ASM_HW_IRQ_H

/*
 *	linux/include/asm/hw_irq.h
 *
 *	(C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
 *
 *	moved some of the old arch/i386/kernel/irq.h to here. VY
 *
 *	IRQ/IPI changes taken from work by Thomas Radke
 *	<tomsoft@informatik.tu-chemnitz.de>
 *
 *	hacked by Andi Kleen for x86-64.
 */

#ifndef __ASSEMBLY__
#include <asm/atomic.h>
#include <asm/irq.h>
#include <linux/profile.h>
#include <linux/smp.h>
#include <linux/percpu.h>
#endif

#define NMI_VECTOR		0x02
/*
 * IDT vectors usable for external interrupt sources start
 * at 0x20:
 */
#define FIRST_EXTERNAL_VECTOR	0x20

#define IA32_SYSCALL_VECTOR	0x80


/* Reserve the lowest usable priority level 0x20 - 0x2f for triggering
 * cleanup after irq migration.
 */
#define IRQ_MOVE_CLEANUP_VECTOR	FIRST_EXTERNAL_VECTOR
 
/*
 * Vectors 0x30-0x3f are used for ISA interrupts.
 */
#define IRQ0_VECTOR		(FIRST_EXTERNAL_VECTOR + 0x10)
#define IRQ1_VECTOR		(IRQ0_VECTOR + 1)
#define IRQ2_VECTOR		(IRQ0_VECTOR + 2)
#define IRQ3_VECTOR		(IRQ0_VECTOR + 3)
#define IRQ4_VECTOR		(IRQ0_VECTOR + 4)
#define IRQ5_VECTOR		(IRQ0_VECTOR + 5)
#define IRQ6_VECTOR		(IRQ0_VECTOR + 6)
#define IRQ7_VECTOR		(IRQ0_VECTOR + 7)
#define IRQ8_VECTOR		(IRQ0_VECTOR + 8)
#define IRQ9_VECTOR		(IRQ0_VECTOR + 9)
#define IRQ10_VECTOR		(IRQ0_VECTOR + 10)
#define IRQ11_VECTOR		(IRQ0_VECTOR + 11)
#define IRQ12_VECTOR		(IRQ0_VECTOR + 12)
#define IRQ13_VECTOR		(IRQ0_VECTOR + 13)
#define IRQ14_VECTOR		(IRQ0_VECTOR + 14)
#define IRQ15_VECTOR		(IRQ0_VECTOR + 15)

/*
 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
 *
 *  some of the following vectors are 'rare', they are merged
 *  into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
 *  TLB, reschedule and local APIC vectors are performance-critical.
 */
#define SPURIOUS_APIC_VECTOR	0xff
#define ERROR_APIC_VECTOR	0xfe
#define RESCHEDULE_VECTOR	0xfd
#define CALL_FUNCTION_VECTOR	0xfc
/* fb free - please don't readd KDB here because it's useless
   (hint - think what a NMI bit does to a vector) */
#define THERMAL_APIC_VECTOR	0xfa
#define THRESHOLD_APIC_VECTOR   0xf9
/* f8 free */
#define INVALIDATE_TLB_VECTOR_END	0xf7
#define INVALIDATE_TLB_VECTOR_START	0xf0	/* f0-f7 used for TLB flush */

#define NUM_INVALIDATE_TLB_VECTORS	8

/*
 * Local APIC timer IRQ vector is on a different priority level,
 * to work around the 'lost local interrupt if more than 2 IRQ
 * sources per level' errata.
 */
#define LOCAL_TIMER_VECTOR	0xef

/*
 * First APIC vector available to drivers: (vectors 0x30-0xee)
 * we start at 0x41 to spread out vectors evenly between priority
 * levels. (0x80 is the syscall vector)
 */
#define FIRST_DEVICE_VECTOR	(IRQ15_VECTOR + 2)
#define FIRST_SYSTEM_VECTOR	0xef   /* duplicated in irq.h */


#ifndef __ASSEMBLY__

/* Interrupt handlers registered during init_IRQ */
void apic_timer_interrupt(void);
void spurious_interrupt(void);
void error_interrupt(void);
void reschedule_interrupt(void);
void call_function_interrupt(void);
void irq_move_cleanup_interrupt(void);
void invalidate_interrupt0(void);
void invalidate_interrupt1(void);
void invalidate_interrupt2(void);
void invalidate_interrupt3(void);
void invalidate_interrupt4(void);
void invalidate_interrupt5(void);
void invalidate_interrupt6(void);
void invalidate_interrupt7(void);
void thermal_interrupt(void);
void threshold_interrupt(void);
void i8254_timer_resume(void);

typedef int vector_irq_t[NR_VECTORS];
DECLARE_PER_CPU(vector_irq_t, vector_irq);
extern void __setup_vector_irq(int cpu);
extern spinlock_t vector_lock;

/*
 * Various low-level irq details needed by irq.c, process.c,
 * time.c, io_apic.c and smp.c
 *
 * Interrupt entry/exit code at both C and assembly level
 */

extern void disable_8259A_irq(unsigned int irq);
extern void enable_8259A_irq(unsigned int irq);
extern int i8259A_irq_pending(unsigned int irq);
extern void make_8259A_irq(unsigned int irq);
extern void init_8259A(int aeoi);
extern void send_IPI_self(int vector);
extern void init_VISWS_APIC_irqs(void);
extern void setup_IO_APIC(void);
extern void disable_IO_APIC(void);
extern void print_IO_APIC(void);
extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
extern void send_IPI(int dest, int vector);
extern void setup_ioapic_dest(void);

extern unsigned long io_apic_irqs;

extern atomic_t irq_err_count;
extern atomic_t irq_mis_count;

#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))

#include <asm/ptrace.h>

#define IRQ_NAME2(nr) nr##_interrupt(void)
#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)

/*
 *	SMP has a few special interrupts for IPI messages
 */

#define BUILD_IRQ(nr) \
asmlinkage void IRQ_NAME(nr); \
__asm__( \
"\n.p2align\n" \
"IRQ" #nr "_interrupt:\n\t" \
	"push $~(" #nr ") ; " \
	"jmp common_interrupt");

#define platform_legacy_irq(irq)	((irq) < 16)

#endif

#endif /* _ASM_HW_IRQ_H */