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1 | #ifndef _ASM_HW_IRQ_H |
2 | #define _ASM_HW_IRQ_H | |
3 | ||
4 | /* | |
5 | * linux/include/asm/hw_irq.h | |
6 | * | |
7 | * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar | |
8 | * | |
9 | * moved some of the old arch/i386/kernel/irq.h to here. VY | |
10 | * | |
11 | * IRQ/IPI changes taken from work by Thomas Radke | |
12 | * <tomsoft@informatik.tu-chemnitz.de> | |
13 | * | |
14 | * hacked by Andi Kleen for x86-64. | |
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15 | */ |
16 | ||
17 | #ifndef __ASSEMBLY__ | |
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18 | #include <asm/atomic.h> |
19 | #include <asm/irq.h> | |
20 | #include <linux/profile.h> | |
21 | #include <linux/smp.h> | |
550f2299 | 22 | #include <linux/percpu.h> |
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23 | #endif |
24 | ||
1a426cb7 | 25 | #define NMI_VECTOR 0x02 |
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26 | /* |
27 | * IDT vectors usable for external interrupt sources start | |
28 | * at 0x20: | |
29 | */ | |
30 | #define FIRST_EXTERNAL_VECTOR 0x20 | |
31 | ||
32 | #define IA32_SYSCALL_VECTOR 0x80 | |
33 | ||
34 | ||
35 | /* | |
36 | * Vectors 0x20-0x2f are used for ISA interrupts. | |
37 | */ | |
38 | ||
39 | /* | |
40 | * Special IRQ vectors used by the SMP architecture, 0xf0-0xff | |
41 | * | |
42 | * some of the following vectors are 'rare', they are merged | |
43 | * into a single vector (CALL_FUNCTION_VECTOR) to save vector space. | |
44 | * TLB, reschedule and local APIC vectors are performance-critical. | |
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45 | */ |
46 | #define SPURIOUS_APIC_VECTOR 0xff | |
47 | #define ERROR_APIC_VECTOR 0xfe | |
e5bc8b6b AK |
48 | #define RESCHEDULE_VECTOR 0xfd |
49 | #define CALL_FUNCTION_VECTOR 0xfc | |
915f34e2 AK |
50 | /* fb free - please don't readd KDB here because it's useless |
51 | (hint - think what a NMI bit does to a vector) */ | |
e5bc8b6b | 52 | #define THERMAL_APIC_VECTOR 0xfa |
89b831ef | 53 | #define THRESHOLD_APIC_VECTOR 0xf9 |
e080e9d6 JU |
54 | /* f8 free */ |
55 | #define INVALIDATE_TLB_VECTOR_END 0xf7 | |
56 | #define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */ | |
1da177e4 | 57 | |
e5bc8b6b | 58 | #define NUM_INVALIDATE_TLB_VECTORS 8 |
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59 | |
60 | /* | |
61 | * Local APIC timer IRQ vector is on a different priority level, | |
62 | * to work around the 'lost local interrupt if more than 2 IRQ | |
63 | * sources per level' errata. | |
64 | */ | |
65 | #define LOCAL_TIMER_VECTOR 0xef | |
66 | ||
67 | /* | |
68 | * First APIC vector available to drivers: (vectors 0x30-0xee) | |
69 | * we start at 0x31 to spread out vectors evenly between priority | |
70 | * levels. (0x80 is the syscall vector) | |
71 | */ | |
72 | #define FIRST_DEVICE_VECTOR 0x31 | |
73 | #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */ | |
74 | ||
75 | ||
76 | #ifndef __ASSEMBLY__ | |
550f2299 EB |
77 | typedef int vector_irq_t[NR_VECTORS]; |
78 | DECLARE_PER_CPU(vector_irq_t, vector_irq); | |
70a0a535 EB |
79 | extern void __setup_vector_irq(int cpu); |
80 | extern spinlock_t vector_lock; | |
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81 | |
82 | /* | |
83 | * Various low-level irq details needed by irq.c, process.c, | |
84 | * time.c, io_apic.c and smp.c | |
85 | * | |
86 | * Interrupt entry/exit code at both C and assembly level | |
87 | */ | |
88 | ||
89 | extern void disable_8259A_irq(unsigned int irq); | |
90 | extern void enable_8259A_irq(unsigned int irq); | |
91 | extern int i8259A_irq_pending(unsigned int irq); | |
92 | extern void make_8259A_irq(unsigned int irq); | |
93 | extern void init_8259A(int aeoi); | |
c49c5330 | 94 | extern void send_IPI_self(int vector); |
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95 | extern void init_VISWS_APIC_irqs(void); |
96 | extern void setup_IO_APIC(void); | |
97 | extern void disable_IO_APIC(void); | |
98 | extern void print_IO_APIC(void); | |
99 | extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn); | |
100 | extern void send_IPI(int dest, int vector); | |
101 | extern void setup_ioapic_dest(void); | |
102 | ||
103 | extern unsigned long io_apic_irqs; | |
104 | ||
105 | extern atomic_t irq_err_count; | |
106 | extern atomic_t irq_mis_count; | |
107 | ||
108 | #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs)) | |
109 | ||
110 | #define __STR(x) #x | |
111 | #define STR(x) __STR(x) | |
112 | ||
113 | #include <asm/ptrace.h> | |
114 | ||
115 | #define IRQ_NAME2(nr) nr##_interrupt(void) | |
116 | #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr) | |
117 | ||
118 | /* | |
119 | * SMP has a few special interrupts for IPI messages | |
120 | */ | |
121 | ||
122 | #define BUILD_IRQ(nr) \ | |
123 | asmlinkage void IRQ_NAME(nr); \ | |
124 | __asm__( \ | |
125 | "\n.p2align\n" \ | |
126 | "IRQ" #nr "_interrupt:\n\t" \ | |
19eadf98 | 127 | "push $~(" #nr ") ; " \ |
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128 | "jmp common_interrupt"); |
129 | ||
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130 | #define platform_legacy_irq(irq) ((irq) < 16) |
131 | ||
132 | #endif | |
133 | ||
134 | #endif /* _ASM_HW_IRQ_H */ |