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