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33 lines
680 B
33 lines
680 B
20 years ago
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/*
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* include/asm-arm/arch-cl7500/irq.h
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*
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* Copyright (C) 1996 Russell King
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* Copyright (C) 1999, 2001 Nexus Electronics Ltd.
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*
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* Changelog:
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* 10-10-1996 RMK Brought up to date with arch-sa110eval
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* 22-08-1998 RMK Restructured IRQ routines
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* 11-08-1999 PJB Created ARM7500 version, derived from RiscPC code
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*/
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#include <asm/hardware/iomd.h>
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#include <asm/io.h>
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static inline int fixup_irq(unsigned int irq)
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{
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if (irq == IRQ_ISA) {
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int isabits = *((volatile unsigned int *)0xe002b700);
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if (isabits == 0) {
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printk("Spurious ISA IRQ!\n");
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return irq;
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}
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irq = IRQ_ISA_BASE;
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while (!(isabits & 1)) {
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irq++;
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isabits >>= 1;
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}
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}
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return irq;
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}
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