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 #include <linux/config.h>
  21
  22
  23 #define CPU_IRQ_REGION          1
  24 #define TIMER_IRQ               (IRQ_FROM_REGION(CPU_IRQ_REGION) | 0)
  25 #define IPI_IRQ                 (IRQ_FROM_REGION(CPU_IRQ_REGION) | 1)
  26
  27 /* This should be 31 for PA1.1 binaries and 63 for PA-2.0 wide mode */
  28 #define MAX_CPU_IRQ             (BITS_PER_LONG - 1)
  29
  30 #if BITS_PER_LONG == 32
  31 #  define IRQ_REGION_SHIFT      5
  32 #else
  33 #  define IRQ_REGION_SHIFT      6
  34 #endif
  35
  36 #define IRQ_PER_REGION          (1 << IRQ_REGION_SHIFT)
  37 #define NR_IRQ_REGS             16
  38 #define NR_IRQS                 (NR_IRQ_REGS * IRQ_PER_REGION)
  39
  40 #define IRQ_REGION(irq)         ((irq) >> IRQ_REGION_SHIFT)
  41 #define IRQ_OFFSET(irq)         ((irq) & ((1<<IRQ_REGION_SHIFT)-1))
  42 #define IRQ_FROM_REGION(reg)    ((reg) << IRQ_REGION_SHIFT)
  43
  44 #define EISA_IRQ_REGION         0 /* region 0 needs to be reserved for EISA */
  45 #define EISA_MAX_IRQS           16 /* max. (E)ISA irq line */
  46
  47 struct irq_region_ops {
  48         void (*disable_irq)(void *dev, int irq);
  49         void (* enable_irq)(void *dev, int irq);
  50         void (*   mask_irq)(void *dev, int irq);
  51         void (* unmask_irq)(void *dev, int irq);
  52 };
  53
  54 struct irq_region_data {
  55         void *dev;
  56         const char *name;
  57         int irqbase;
  58         unsigned int status[IRQ_PER_REGION]; /* IRQ status */
  59 };
  60
  61 struct irq_region {
  62         struct irq_region_ops ops;
  63         struct irq_region_data data;
  64
  65         struct irqaction *action;
  66 };
  67
  68 extern struct irq_region *irq_region[NR_IRQ_REGS];
  69
  70 static __inline__ int irq_canonicalize(int irq)
  71 {
  72 #ifdef CONFIG_EISA
  73         return (irq == (IRQ_FROM_REGION(EISA_IRQ_REGION)+2)
  74                 ? (IRQ_FROM_REGION(EISA_IRQ_REGION)+9) : irq);
  75 #else
  76         return irq;
  77 #endif
  78 }
  79
  80 extern void disable_irq(int);
  81 #define disable_irq_nosync(i) disable_irq(i)
  82 extern void enable_irq(int);
  83
  84 extern void do_irq(struct irqaction *a, int i, struct pt_regs *p);
  85 extern void do_irq_mask(unsigned long mask, struct irq_region *region,
  86         struct pt_regs *regs);
  87
  88 extern struct irq_region *alloc_irq_region(int count, struct irq_region_ops *ops,
  89         const char *name, void *dev);
  90
  91 extern int txn_alloc_irq(void);
  92 extern int txn_claim_irq(int);
  93 extern unsigned int txn_alloc_data(int, unsigned int);
  94 extern unsigned long txn_alloc_addr(int);
  95
  96 /* soft power switch support (power.c) */
  97 extern struct tasklet_struct power_tasklet;
  98
  99 struct irqaction;
 100 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
 101
 102 #endif  /* _ASM_PARISC_IRQ_H */