Linux Kernel  3.7.1
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irq.h
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1 #ifdef __KERNEL__
2 #ifndef _ASM_POWERPC_IRQ_H
3 #define _ASM_POWERPC_IRQ_H
4 
5 /*
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11 
12 #include <linux/irqdomain.h>
13 #include <linux/threads.h>
14 #include <linux/list.h>
15 #include <linux/radix-tree.h>
16 
17 #include <asm/types.h>
18 #include <linux/atomic.h>
19 
20 
21 extern atomic_t ppc_n_lost_interrupts;
22 
23 /* This number is used when no interrupt has been assigned */
24 #define NO_IRQ (0)
25 
26 /* Total number of virq in the platform */
27 #define NR_IRQS CONFIG_NR_IRQS
28 
29 /* Same thing, used by the generic IRQ code */
30 #define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS
31 
32 extern irq_hw_number_t virq_to_hw(unsigned int virq);
33 
37 extern void irq_early_init(void);
38 
39 static __inline__ int irq_canonicalize(int irq)
40 {
41  return irq;
42 }
43 
44 extern int distribute_irqs;
45 
46 struct irqaction;
47 struct pt_regs;
48 
49 #define __ARCH_HAS_DO_SOFTIRQ
50 
51 #if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
52 /*
53  * Per-cpu stacks for handling critical, debug and machine check
54  * level interrupts.
55  */
56 extern struct thread_info *critirq_ctx[NR_CPUS];
57 extern struct thread_info *dbgirq_ctx[NR_CPUS];
58 extern struct thread_info *mcheckirq_ctx[NR_CPUS];
59 extern void exc_lvl_ctx_init(void);
60 #else
61 #define exc_lvl_ctx_init()
62 #endif
63 
64 /*
65  * Per-cpu stacks for handling hard and soft interrupts.
66  */
67 extern struct thread_info *hardirq_ctx[NR_CPUS];
68 extern struct thread_info *softirq_ctx[NR_CPUS];
69 
70 extern void irq_ctx_init(void);
71 extern void call_do_softirq(struct thread_info *tp);
72 extern int call_handle_irq(int irq, void *p1,
73  struct thread_info *tp, void *func);
74 extern void do_IRQ(struct pt_regs *regs);
75 
76 int irq_choose_cpu(const struct cpumask *mask);
77 
78 #endif /* _ASM_IRQ_H */
79 #endif /* __KERNEL__ */