LXR linux/arch/powerpc/include/asm/irq.h

   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
  21extern 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
  32extern irq_hw_number_t virq_to_hw(unsigned int virq);
  33
  34/**
  35 * irq_early_init - Init irq remapping subsystem
  36 */
  37extern void irq_early_init(void);
  38
  39static __inline__ int irq_canonicalize(int irq)
  40{
  41        return irq;
  42}
  43
  44extern int distribute_irqs;
  45
  46struct irqaction;
  47struct 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 */
  56extern struct thread_info *critirq_ctx[NR_CPUS];
  57extern struct thread_info *dbgirq_ctx[NR_CPUS];
  58extern struct thread_info *mcheckirq_ctx[NR_CPUS];
  59extern 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 */
  67extern struct thread_info *hardirq_ctx[NR_CPUS];
  68extern struct thread_info *softirq_ctx[NR_CPUS];
  69
  70extern void irq_ctx_init(void);
  71extern void call_do_softirq(struct thread_info *tp);
  72extern int call_handle_irq(int irq, void *p1,
  73                           struct thread_info *tp, void *func);
  74extern void do_IRQ(struct pt_regs *regs);
  75
  76int irq_choose_cpu(const struct cpumask *mask);
  77
  78#endif /* _ASM_IRQ_H */
  79#endif /* __KERNEL__ */
  80