| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle |
| * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle |
| * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| * Copyright (C) 2001 Kanoj Sarcar |
| */ |
| #ifndef _ASM_IRQ_H |
| #define _ASM_IRQ_H |
| |
| #include <linux/config.h> |
| #include <linux/linkage.h> |
| #include <asm/sn/arch.h> |
| |
| #define NR_IRQS 256 |
| |
| /* |
| * Number of levels in INT_PEND0. Can be set to 128 if we also |
| * consider INT_PEND1. |
| */ |
| #define PERNODE_LEVELS 64 |
| |
| extern int node_level_to_irq[MAX_COMPACT_NODES][PERNODE_LEVELS]; |
| |
| /* |
| * we need to map irq's up to at least bit 7 of the INT_MASK0_A register |
| * since bits 0-6 are pre-allocated for other purposes. |
| */ |
| #define LEAST_LEVEL 7 |
| #define FAST_IRQ_TO_LEVEL(i) ((i) + LEAST_LEVEL) |
| #define LEVEL_TO_IRQ(c, l) \ |
| (node_level_to_irq[CPUID_TO_COMPACT_NODEID(c)][(l)]) |
| |
| #ifdef CONFIG_I8259 |
| static inline int irq_cannonicalize(int irq) |
| { |
| return ((irq == 2) ? 9 : irq); |
| } |
| #else |
| #define irq_cannonicalize(irq) (irq) /* Sane hardware, sane code ... */ |
| #endif |
| |
| extern void disable_irq(unsigned int); |
| extern void disable_irq_nosync(unsigned int); |
| extern void enable_irq(unsigned int); |
| |
| struct pt_regs; |
| extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs); |
| |
| /* Machine specific interrupt initialization */ |
| extern void (*irq_setup)(void); |
| |
| extern void init_generic_irq(void); |
| |
| #endif /* _ASM_IRQ_H */ |