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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_X86_HW_IRQ_H
2#define _ASM_X86_HW_IRQ_H
3
4/*
5 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
6 *
7 * moved some of the old arch/i386/kernel/irq.h to here. VY
8 *
9 * IRQ/IPI changes taken from work by Thomas Radke
10 * <tomsoft@informatik.tu-chemnitz.de>
11 *
12 * hacked by Andi Kleen for x86-64.
13 * unified by tglx
14 */
15
16#include <asm/irq_vectors.h>
17
18#ifndef __ASSEMBLY__
19
20#include <linux/percpu.h>
21#include <linux/profile.h>
22#include <linux/smp.h>
23
24#include <linux/atomic.h>
25#include <asm/irq.h>
26#include <asm/sections.h>
27
28/* Interrupt handlers registered during init_IRQ */
29extern asmlinkage void apic_timer_interrupt(void);
30extern asmlinkage void x86_platform_ipi(void);
31extern asmlinkage void kvm_posted_intr_ipi(void);
32extern asmlinkage void error_interrupt(void);
33extern asmlinkage void irq_work_interrupt(void);
34
35extern asmlinkage void spurious_interrupt(void);
36extern asmlinkage void thermal_interrupt(void);
37extern asmlinkage void reschedule_interrupt(void);
38
39extern asmlinkage void invalidate_interrupt(void);
40extern asmlinkage void invalidate_interrupt0(void);
41extern asmlinkage void invalidate_interrupt1(void);
42extern asmlinkage void invalidate_interrupt2(void);
43extern asmlinkage void invalidate_interrupt3(void);
44extern asmlinkage void invalidate_interrupt4(void);
45extern asmlinkage void invalidate_interrupt5(void);
46extern asmlinkage void invalidate_interrupt6(void);
47extern asmlinkage void invalidate_interrupt7(void);
48extern asmlinkage void invalidate_interrupt8(void);
49extern asmlinkage void invalidate_interrupt9(void);
50extern asmlinkage void invalidate_interrupt10(void);
51extern asmlinkage void invalidate_interrupt11(void);
52extern asmlinkage void invalidate_interrupt12(void);
53extern asmlinkage void invalidate_interrupt13(void);
54extern asmlinkage void invalidate_interrupt14(void);
55extern asmlinkage void invalidate_interrupt15(void);
56extern asmlinkage void invalidate_interrupt16(void);
57extern asmlinkage void invalidate_interrupt17(void);
58extern asmlinkage void invalidate_interrupt18(void);
59extern asmlinkage void invalidate_interrupt19(void);
60extern asmlinkage void invalidate_interrupt20(void);
61extern asmlinkage void invalidate_interrupt21(void);
62extern asmlinkage void invalidate_interrupt22(void);
63extern asmlinkage void invalidate_interrupt23(void);
64extern asmlinkage void invalidate_interrupt24(void);
65extern asmlinkage void invalidate_interrupt25(void);
66extern asmlinkage void invalidate_interrupt26(void);
67extern asmlinkage void invalidate_interrupt27(void);
68extern asmlinkage void invalidate_interrupt28(void);
69extern asmlinkage void invalidate_interrupt29(void);
70extern asmlinkage void invalidate_interrupt30(void);
71extern asmlinkage void invalidate_interrupt31(void);
72
73extern asmlinkage void irq_move_cleanup_interrupt(void);
74extern asmlinkage void reboot_interrupt(void);
75extern asmlinkage void threshold_interrupt(void);
76
77extern asmlinkage void call_function_interrupt(void);
78extern asmlinkage void call_function_single_interrupt(void);
79
80#ifdef CONFIG_TRACING
81/* Interrupt handlers registered during init_IRQ */
82extern void trace_apic_timer_interrupt(void);
83extern void trace_x86_platform_ipi(void);
84extern void trace_error_interrupt(void);
85extern void trace_irq_work_interrupt(void);
86extern void trace_spurious_interrupt(void);
87extern void trace_thermal_interrupt(void);
88extern void trace_reschedule_interrupt(void);
89extern void trace_threshold_interrupt(void);
90extern void trace_call_function_interrupt(void);
91extern void trace_call_function_single_interrupt(void);
92#define trace_irq_move_cleanup_interrupt irq_move_cleanup_interrupt
93#define trace_reboot_interrupt reboot_interrupt
94#define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi
95#endif /* CONFIG_TRACING */
96
97/* IOAPIC */
98#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
99extern unsigned long io_apic_irqs;
100
101extern void setup_IO_APIC(void);
102extern void disable_IO_APIC(void);
103
104struct io_apic_irq_attr {
105 int ioapic;
106 int ioapic_pin;
107 int trigger;
108 int polarity;
109};
110
111static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
112 int ioapic, int ioapic_pin,
113 int trigger, int polarity)
114{
115 irq_attr->ioapic = ioapic;
116 irq_attr->ioapic_pin = ioapic_pin;
117 irq_attr->trigger = trigger;
118 irq_attr->polarity = polarity;
119}
120
121/* Intel specific interrupt remapping information */
122struct irq_2_iommu {
123 struct intel_iommu *iommu;
124 u16 irte_index;
125 u16 sub_handle;
126 u8 irte_mask;
127};
128
129/* AMD specific interrupt remapping information */
130struct irq_2_irte {
131 u16 devid; /* Device ID for IRTE table */
132 u16 index; /* Index into IRTE table*/
133};
134
135/*
136 * This is performance-critical, we want to do it O(1)
137 *
138 * Most irqs are mapped 1:1 with pins.
139 */
140struct irq_cfg {
141 struct irq_pin_list *irq_2_pin;
142 cpumask_var_t domain;
143 cpumask_var_t old_domain;
144 u8 vector;
145 u8 move_in_progress : 1;
146#ifdef CONFIG_IRQ_REMAP
147 u8 remapped : 1;
148 union {
149 struct irq_2_iommu irq_2_iommu;
150 struct irq_2_irte irq_2_irte;
151 };
152#endif
153};
154
155extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
156extern void send_cleanup_vector(struct irq_cfg *);
157
158struct irq_data;
159int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
160 unsigned int *dest_id);
161extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
162extern void setup_ioapic_dest(void);
163
164extern void enable_IO_APIC(void);
165
166/* Statistics */
167extern atomic_t irq_err_count;
168extern atomic_t irq_mis_count;
169
170/* EISA */
171extern void eisa_set_level_irq(unsigned int irq);
172
173/* SMP */
174extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
175extern __visible void smp_spurious_interrupt(struct pt_regs *);
176extern __visible void smp_x86_platform_ipi(struct pt_regs *);
177extern __visible void smp_error_interrupt(struct pt_regs *);
178#ifdef CONFIG_X86_IO_APIC
179extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
180#endif
181#ifdef CONFIG_SMP
182extern __visible void smp_reschedule_interrupt(struct pt_regs *);
183extern __visible void smp_call_function_interrupt(struct pt_regs *);
184extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
185extern __visible void smp_invalidate_interrupt(struct pt_regs *);
186#endif
187
188extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
189#ifdef CONFIG_TRACING
190#define trace_interrupt interrupt
191#endif
192
193#define VECTOR_UNDEFINED (-1)
194#define VECTOR_RETRIGGERED (-2)
195
196typedef int vector_irq_t[NR_VECTORS];
197DECLARE_PER_CPU(vector_irq_t, vector_irq);
198extern void setup_vector_irq(int cpu);
199
200#ifdef CONFIG_X86_IO_APIC
201extern void lock_vector_lock(void);
202extern void unlock_vector_lock(void);
203extern void __setup_vector_irq(int cpu);
204#else
205static inline void lock_vector_lock(void) {}
206static inline void unlock_vector_lock(void) {}
207static inline void __setup_vector_irq(int cpu) {}
208#endif
209
210#endif /* !ASSEMBLY_ */
211
212#endif /* _ASM_X86_HW_IRQ_H */