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