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hw_irq.h
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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
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 */
29 extern void apic_timer_interrupt(void);
30 extern void x86_platform_ipi(void);
31 extern void error_interrupt(void);
32 extern void irq_work_interrupt(void);
33 
34 extern void spurious_interrupt(void);
35 extern void thermal_interrupt(void);
36 extern void reschedule_interrupt(void);
37 
38 extern void invalidate_interrupt(void);
39 extern void invalidate_interrupt0(void);
40 extern void invalidate_interrupt1(void);
41 extern void invalidate_interrupt2(void);
42 extern void invalidate_interrupt3(void);
43 extern void invalidate_interrupt4(void);
44 extern void invalidate_interrupt5(void);
45 extern void invalidate_interrupt6(void);
46 extern void invalidate_interrupt7(void);
47 extern void invalidate_interrupt8(void);
48 extern void invalidate_interrupt9(void);
49 extern void invalidate_interrupt10(void);
50 extern void invalidate_interrupt11(void);
51 extern void invalidate_interrupt12(void);
52 extern void invalidate_interrupt13(void);
53 extern void invalidate_interrupt14(void);
54 extern void invalidate_interrupt15(void);
55 extern void invalidate_interrupt16(void);
56 extern void invalidate_interrupt17(void);
57 extern void invalidate_interrupt18(void);
58 extern void invalidate_interrupt19(void);
59 extern void invalidate_interrupt20(void);
60 extern void invalidate_interrupt21(void);
61 extern void invalidate_interrupt22(void);
62 extern void invalidate_interrupt23(void);
63 extern void invalidate_interrupt24(void);
64 extern void invalidate_interrupt25(void);
65 extern void invalidate_interrupt26(void);
66 extern void invalidate_interrupt27(void);
67 extern void invalidate_interrupt28(void);
68 extern void invalidate_interrupt29(void);
69 extern void invalidate_interrupt30(void);
70 extern void invalidate_interrupt31(void);
71 
72 extern void irq_move_cleanup_interrupt(void);
73 extern void reboot_interrupt(void);
74 extern void threshold_interrupt(void);
75 
76 extern void call_function_interrupt(void);
77 extern void call_function_single_interrupt(void);
78 
79 /* IOAPIC */
80 #define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
81 extern unsigned long io_apic_irqs;
82 
83 extern void init_VISWS_APIC_irqs(void);
84 extern void setup_IO_APIC(void);
85 extern void disable_IO_APIC(void);
86 
88  int ioapic;
90  int trigger;
91  int polarity;
92 };
93 
94 static 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 
104 struct irq_2_iommu {
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  */
116 struct irq_cfg {
121  u8 move_in_progress : 1;
122 #ifdef CONFIG_IRQ_REMAP
123  struct irq_2_iommu irq_2_iommu;
124 #endif
125 };
126 
127 extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
128 extern void send_cleanup_vector(struct irq_cfg *);
129 
130 struct irq_data;
131 int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
132  unsigned int *dest_id);
133 extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
134 extern void setup_ioapic_dest(void);
135 
136 extern void enable_IO_APIC(void);
137 
138 /* Statistics */
139 extern atomic_t irq_err_count;
140 extern atomic_t irq_mis_count;
141 
142 /* EISA */
143 extern void eisa_set_level_irq(unsigned int irq);
144 
145 /* SMP */
146 extern void smp_apic_timer_interrupt(struct pt_regs *);
147 extern void smp_spurious_interrupt(struct pt_regs *);
148 extern void smp_x86_platform_ipi(struct pt_regs *);
149 extern void smp_error_interrupt(struct pt_regs *);
150 #ifdef CONFIG_X86_IO_APIC
151 extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
152 #endif
153 #ifdef CONFIG_SMP
154 extern void smp_reschedule_interrupt(struct pt_regs *);
155 extern void smp_call_function_interrupt(struct pt_regs *);
156 extern void smp_call_function_single_interrupt(struct pt_regs *);
157 #ifdef CONFIG_X86_32
158 extern void smp_invalidate_interrupt(struct pt_regs *);
159 #else
160 extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
161 #endif
162 #endif
163 
165 
167 DECLARE_PER_CPU(vector_irq_t, vector_irq);
168 extern void setup_vector_irq(int cpu);
169 
170 #ifdef CONFIG_X86_IO_APIC
171 extern void lock_vector_lock(void);
172 extern void unlock_vector_lock(void);
173 extern void __setup_vector_irq(int cpu);
174 #else
175 static inline void lock_vector_lock(void) {}
176 static inline void unlock_vector_lock(void) {}
177 static inline void __setup_vector_irq(int cpu) {}
178 #endif
179 
180 #endif /* !ASSEMBLY_ */
181 
182 #endif /* _ASM_X86_HW_IRQ_H */