irq.h
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上传日期:2013-02-24
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- /*
- * 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, 1999, 2000 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 <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
- struct irqaction;
- extern int i8259_setup_irq(int irq, struct irqaction * new);
- extern void disable_irq(unsigned int);
- extern void enable_irq(unsigned int);
- /* Machine specific interrupt initialization */
- extern void (*irq_setup)(void);
- #endif /* _ASM_IRQ_H */