Viewing file:  irq.h (2.24 KB) -rw-r--r--
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#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 */
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