tjh.dev
Linux kernel mirror (for testing)
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kernel
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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 void apic_timer_interrupt(void);
30extern void x86_platform_ipi(void);
31extern void error_interrupt(void);
32extern void irq_work_interrupt(void);
33
34extern void spurious_interrupt(void);
35extern void thermal_interrupt(void);
36extern void reschedule_interrupt(void);
37
38extern void invalidate_interrupt(void);
39extern void invalidate_interrupt0(void);
40extern void invalidate_interrupt1(void);
41extern void invalidate_interrupt2(void);
42extern void invalidate_interrupt3(void);
43extern void invalidate_interrupt4(void);
44extern void invalidate_interrupt5(void);
45extern void invalidate_interrupt6(void);
46extern void invalidate_interrupt7(void);
47extern void invalidate_interrupt8(void);
48extern void invalidate_interrupt9(void);
49extern void invalidate_interrupt10(void);
50extern void invalidate_interrupt11(void);
51extern void invalidate_interrupt12(void);
52extern void invalidate_interrupt13(void);
53extern void invalidate_interrupt14(void);
54extern void invalidate_interrupt15(void);
55extern void invalidate_interrupt16(void);
56extern void invalidate_interrupt17(void);
57extern void invalidate_interrupt18(void);
58extern void invalidate_interrupt19(void);
59extern void invalidate_interrupt20(void);
60extern void invalidate_interrupt21(void);
61extern void invalidate_interrupt22(void);
62extern void invalidate_interrupt23(void);
63extern void invalidate_interrupt24(void);
64extern void invalidate_interrupt25(void);
65extern void invalidate_interrupt26(void);
66extern void invalidate_interrupt27(void);
67extern void invalidate_interrupt28(void);
68extern void invalidate_interrupt29(void);
69extern void invalidate_interrupt30(void);
70extern void invalidate_interrupt31(void);
71
72extern void irq_move_cleanup_interrupt(void);
73extern void reboot_interrupt(void);
74extern void threshold_interrupt(void);
75
76extern void call_function_interrupt(void);
77extern void call_function_single_interrupt(void);
78
79/* IOAPIC */
80#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
81extern unsigned long io_apic_irqs;
82
83extern void init_VISWS_APIC_irqs(void);
84extern void setup_IO_APIC(void);
85extern void disable_IO_APIC(void);
86
87struct io_apic_irq_attr {
88 int ioapic;
89 int ioapic_pin;
90 int trigger;
91 int polarity;
92};
93
94static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
95 int ioapic, int ioapic_pin,
96 int trigger, int polarity)
97{
98 irq_attr->ioapic = ioapic;
99 irq_attr->ioapic_pin = ioapic_pin;
100 irq_attr->trigger = trigger;
101 irq_attr->polarity = polarity;
102}
103
104struct irq_2_iommu {
105 struct intel_iommu *iommu;
106 u16 irte_index;
107 u16 sub_handle;
108 u8 irte_mask;
109};
110
111/*
112 * This is performance-critical, we want to do it O(1)
113 *
114 * Most irqs are mapped 1:1 with pins.
115 */
116struct irq_cfg {
117 struct irq_pin_list *irq_2_pin;
118 cpumask_var_t domain;
119 cpumask_var_t old_domain;
120 u8 vector;
121 u8 move_in_progress : 1;
122#ifdef CONFIG_IRQ_REMAP
123 struct irq_2_iommu irq_2_iommu;
124#endif
125};
126
127extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
128extern void send_cleanup_vector(struct irq_cfg *);
129
130struct irq_data;
131int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
132 unsigned int *dest_id);
133extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
134extern void setup_ioapic_dest(void);
135
136extern void enable_IO_APIC(void);
137
138/* Statistics */
139extern atomic_t irq_err_count;
140extern atomic_t irq_mis_count;
141
142/* EISA */
143extern void eisa_set_level_irq(unsigned int irq);
144
145/* SMP */
146extern void smp_apic_timer_interrupt(struct pt_regs *);
147extern void smp_spurious_interrupt(struct pt_regs *);
148extern void smp_x86_platform_ipi(struct pt_regs *);
149extern void smp_error_interrupt(struct pt_regs *);
150#ifdef CONFIG_X86_IO_APIC
151extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
152#endif
153#ifdef CONFIG_SMP
154extern void smp_reschedule_interrupt(struct pt_regs *);
155extern void smp_call_function_interrupt(struct pt_regs *);
156extern void smp_call_function_single_interrupt(struct pt_regs *);
157#ifdef CONFIG_X86_32
158extern void smp_invalidate_interrupt(struct pt_regs *);
159#else
160extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
161#endif
162#endif
163
164extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
165
166typedef int vector_irq_t[NR_VECTORS];
167DECLARE_PER_CPU(vector_irq_t, vector_irq);
168extern void setup_vector_irq(int cpu);
169
170#ifdef CONFIG_X86_IO_APIC
171extern void lock_vector_lock(void);
172extern void unlock_vector_lock(void);
173extern void __setup_vector_irq(int cpu);
174#else
175static inline void lock_vector_lock(void) {}
176static inline void unlock_vector_lock(void) {}
177static inline void __setup_vector_irq(int cpu) {}
178#endif
179
180#endif /* !ASSEMBLY_ */
181
182#endif /* _ASM_X86_HW_IRQ_H */