LXR linux-old/include/asm-parisc/irq.h

   1/*
   2 *      linux/include/asm-parisc/irq.h
   3 *
   4 *      (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar,
   5 *              Copyright 1999 SuSE GmbH
   6 *
   7 *      IRQ/IPI changes taken from work by Thomas Radke
   8 *      <tomsoft@informatik.tu-chemnitz.de>
   9 */
  10
  11#ifndef _ASM_PARISC_IRQ_H
  12#define _ASM_PARISC_IRQ_H
  13
  14#include <asm/ptrace.h>
  15#include <asm/types.h>
  16
  17#include <linux/string.h>
  18#include <linux/interrupt.h>
  19
  20
  21#define CPU_IRQ_REGION          1
  22#define TIMER_IRQ               (IRQ_FROM_REGION(CPU_IRQ_REGION) | 0)
  23#define IPI_IRQ                 (IRQ_FROM_REGION(CPU_IRQ_REGION) | 1)
  24
  25/* This should be 31 for PA1.1 binaries and 63 for PA-2.0 wide mode */
  26#define MAX_CPU_IRQ             (BITS_PER_LONG - 1)
  27
  28#if BITS_PER_LONG == 32
  29#  define IRQ_REGION_SHIFT      5
  30#else
  31#  define IRQ_REGION_SHIFT      6
  32#endif
  33
  34#define IRQ_PER_REGION          (1 << IRQ_REGION_SHIFT)
  35#define NR_IRQ_REGS             16
  36#define NR_IRQS                 (NR_IRQ_REGS * IRQ_PER_REGION)
  37
  38#define IRQ_REGION(irq)         ((irq) >> IRQ_REGION_SHIFT)
  39#define IRQ_OFFSET(irq)         ((irq) & ((1<<IRQ_REGION_SHIFT)-1))
  40#define IRQ_FROM_REGION(reg)    ((reg) << IRQ_REGION_SHIFT)
  41
  42#define EISA_IRQ_REGION         0 /* region 0 needs to be reserved for EISA */
  43#define EISA_MAX_IRQS           16 /* max. (E)ISA irq line */
  44
  45struct irq_region_ops {
  46        void (*disable_irq)(void *dev, int irq);
  47        void (* enable_irq)(void *dev, int irq);
  48        void (*   mask_irq)(void *dev, int irq);
  49        void (* unmask_irq)(void *dev, int irq);
  50};
  51
  52struct irq_region_data {
  53        void *dev;
  54        const char *name;
  55        int irqbase;
  56        unsigned int status[IRQ_PER_REGION]; /* IRQ status */
  57};
  58
  59struct irq_region {
  60        struct irq_region_ops ops;
  61        struct irq_region_data data;
  62
  63        struct irqaction *action;
  64};
  65
  66extern struct irq_region *irq_region[NR_IRQ_REGS];
  67
  68static __inline__ int irq_cannonicalize(int irq)
  69{
  70#ifdef CONFIG_EISA
  71        return (irq == (IRQ_FROM_REGION(EISA_IRQ_REGION)+2) 
  72                ? (IRQ_FROM_REGION(EISA_IRQ_REGION)+9) : irq);
  73#else
  74        return irq;
  75#endif
  76}
  77
  78extern void disable_irq(int);
  79#define disable_irq_nosync(i) disable_irq(i)
  80extern void enable_irq(int);
  81
  82extern void do_irq(struct irqaction *a, int i, struct pt_regs *p);
  83extern void do_irq_mask(unsigned long mask, struct irq_region *region,
  84        struct pt_regs *regs);
  85
  86extern struct irq_region *alloc_irq_region(int count, struct irq_region_ops *ops,
  87        const char *name, void *dev);
  88
  89extern int txn_alloc_irq(void);
  90extern int txn_claim_irq(int);
  91extern unsigned int txn_alloc_data(int, unsigned int);
  92extern unsigned long txn_alloc_addr(int);
  93
  94/* soft power switch support (power.c) */
  95extern struct tasklet_struct power_tasklet;
  96
  97#endif  /* _ASM_PARISC_IRQ_H */
  98