irq.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- #ifndef _ASM_IRQ_H
- #define _ASM_IRQ_H
- #include <linux/string.h>
- #include <asm/ptrace.h>
- #include <linux/interrupt.h>
- #include <asm/types.h>
- /*
- * linux/include/asm/irq.h
- *
- * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar,
- * Copyright 1999 SuSE GmbH
- *
- * IRQ/IPI changes taken from work by Thomas Radke
- * <tomsoft@informatik.tu-chemnitz.de>
- */
- #define CPU_IRQ_REGION 1
- #define TIMER_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 0)
- #define IPI_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 1)
- /* This should be 31 for PA1.1 binaries and 63 for PA-2.0 wide mode) */
- #define MAX_CPU_IRQ (BITS_PER_LONG - 1)
- #if 1 /* set to 1 to get the new irq offsets, or ... */
- # if BITS_PER_LONG == 32
- # define IRQ_REGION_SHIFT 5
- # else
- # define IRQ_REGION_SHIFT 6
- # endif
- #else /* 256 irq-entries per region (wastes memory, maybe gains speed? :-))*/
- # define IRQ_REGION_SHIFT 8
- #endif
- #define IRQ_PER_REGION (1 << IRQ_REGION_SHIFT)
- #define NR_IRQ_REGS 8
- #define NR_IRQS (NR_IRQ_REGS * IRQ_PER_REGION)
- #define IRQ_REGION(irq) ((irq) >> IRQ_REGION_SHIFT)
- #define IRQ_OFFSET(irq) ((irq) & ((1<<IRQ_REGION_SHIFT)-1))
- #define IRQ_FROM_REGION(reg) ((reg) << IRQ_REGION_SHIFT)
- #define IRQ_REG_DIS 1 /* support disable_irq / enable_irq */
- #define IRQ_REG_MASK 2 /* require IRQs to be masked */
- struct irq_region_ops {
- void (*disable_irq)(void *dev, int irq);
- void (* enable_irq)(void *dev, int irq);
- void (* mask_irq)(void *dev, int irq);
- void (* unmask_irq)(void *dev, int irq);
- };
- struct irq_region_data {
- void *dev;
- const char *name;
- unsigned flags;
- int irqbase;
- };
- struct irq_region {
- struct irq_region_ops ops;
- struct irq_region_data data;
- struct irqaction *action;
- };
- extern struct irq_region *irq_region[NR_IRQ_REGS];
- static __inline__ int irq_cannonicalize(int irq)
- {
- return irq;
- }
- extern void disable_irq(int);
- extern void enable_irq(int);
- extern void do_irq_mask(unsigned long mask, struct irq_region *region,
- struct pt_regs *regs);
- extern struct irq_region *alloc_irq_region(int count, struct irq_region_ops *ops,
- unsigned long flags, const char *name, void *dev);
- extern int txn_alloc_irq(void);
- extern int txn_claim_irq(int);
- extern unsigned int txn_alloc_data(int, unsigned int);
- extern unsigned long txn_alloc_addr(int);
- #endif /* _ASM_IRQ_H */