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Linux/arch/powerpc/include/asm/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 
 34 static __inline__ int irq_canonicalize(int irq)
 35 {
 36         return irq;
 37 }
 38 
 39 extern int distribute_irqs;
 40 
 41 struct irqaction;
 42 struct pt_regs;
 43 
 44 #define __ARCH_HAS_DO_SOFTIRQ
 45 
 46 #if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
 47 /*
 48  * Per-cpu stacks for handling critical, debug and machine check
 49  * level interrupts.
 50  */
 51 extern struct thread_info *critirq_ctx[NR_CPUS];
 52 extern struct thread_info *dbgirq_ctx[NR_CPUS];
 53 extern struct thread_info *mcheckirq_ctx[NR_CPUS];
 54 extern void exc_lvl_ctx_init(void);
 55 #else
 56 #define exc_lvl_ctx_init()
 57 #endif
 58 
 59 /*
 60  * Per-cpu stacks for handling hard and soft interrupts.
 61  */
 62 extern struct thread_info *hardirq_ctx[NR_CPUS];
 63 extern struct thread_info *softirq_ctx[NR_CPUS];
 64 
 65 extern void irq_ctx_init(void);
 66 extern void call_do_softirq(struct thread_info *tp);
 67 extern void call_do_irq(struct pt_regs *regs, struct thread_info *tp);
 68 extern void do_IRQ(struct pt_regs *regs);
 69 extern void __do_irq(struct pt_regs *regs);
 70 
 71 int irq_choose_cpu(const struct cpumask *mask);
 72 
 73 #endif /* _ASM_IRQ_H */
 74 #endif /* __KERNEL__ */
 75 

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