| /* |
| * linux/include/asm-parisc/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> |
| */ |
| |
| #ifndef _ASM_PARISC_IRQ_H |
| #define _ASM_PARISC_IRQ_H |
| |
| #include <asm/ptrace.h> |
| #include <asm/types.h> |
| |
| #include <linux/string.h> |
| #include <linux/interrupt.h> |
| |
| |
| #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 BITS_PER_LONG == 32 |
| # define IRQ_REGION_SHIFT 5 |
| #else |
| # define IRQ_REGION_SHIFT 6 |
| #endif |
| |
| #define IRQ_PER_REGION (1 << IRQ_REGION_SHIFT) |
| #define NR_IRQ_REGS 16 |
| #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 EISA_IRQ_REGION 0 /* region 0 needs to be reserved for EISA */ |
| #define EISA_MAX_IRQS 16 /* max. (E)ISA irq line */ |
| |
| 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; |
| int irqbase; |
| unsigned int status[IRQ_PER_REGION]; /* IRQ status */ |
| }; |
| |
| 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) |
| { |
| #ifdef CONFIG_EISA |
| return (irq == (IRQ_FROM_REGION(EISA_IRQ_REGION)+2) |
| ? (IRQ_FROM_REGION(EISA_IRQ_REGION)+9) : irq); |
| #else |
| return irq; |
| #endif |
| } |
| |
| extern void disable_irq(int); |
| #define disable_irq_nosync(i) disable_irq(i) |
| extern void enable_irq(int); |
| |
| extern void do_irq(struct irqaction *a, int i, struct pt_regs *p); |
| 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, |
| 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); |
| |
| /* soft power switch support (power.c) */ |
| extern struct tasklet_struct power_tasklet; |
| |
| #endif /* _ASM_PARISC_IRQ_H */ |