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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 */
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