1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle 7 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle 8 * Copyright (C) 1999, 2000 Silicon Graphics, Inc. 9 * Copyright (C) 2001 Kanoj Sarcar 10 */ 11#ifndef _ASM_IRQ_H 12#define _ASM_IRQ_H 13 14#include <linux/config.h> 15#include <asm/sn/arch.h> 16 17#define NR_IRQS 256 18 19/* 20 * Number of levels in INT_PEND0. Can be set to 128 if we also 21 * consider INT_PEND1. 22 */ 23#define PERNODE_LEVELS 64 24 25extern int node_level_to_irq[MAX_COMPACT_NODES][PERNODE_LEVELS]; 26 27/* 28 * we need to map irq's up to at least bit 7 of the INT_MASK0_A register 29 * since bits 0-6 are pre-allocated for other purposes. 30 */ 31#define LEAST_LEVEL 7 32#define FAST_IRQ_TO_LEVEL(i) ((i) + LEAST_LEVEL) 33#define LEVEL_TO_IRQ(c, l) \ 34 (node_level_to_irq[CPUID_TO_COMPACT_NODEID(c)][(l)]) 35 36#ifdef CONFIG_I8259 37static inline int irq_cannonicalize(int irq) 38{ 39 return ((irq == 2) ? 9 : irq); 40} 41#else 42#define irq_cannonicalize(irq) (irq) /* Sane hardware, sane code ... */ 43#endif 44 45struct irqaction; 46extern int i8259_setup_irq(int irq, struct irqaction * new); 47 48extern void disable_irq(unsigned int); 49extern void disable_irq_nosync(unsigned int); 50extern void enable_irq(unsigned int); 51 52/* Machine specific interrupt initialization */ 53extern void (*irq_setup)(void); 54 55extern void init_generic_irq(void); 56 57#endif /* _ASM_IRQ_H */ 58