irq.h
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上传日期:2009-04-28
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- /*
- * include/asm-arm/arch-cl7500/irq.h
- *
- * Copyright (C) 1996 Russell King
- * Copyright (C) 1999, 2001 Nexus Electronics Ltd.
- *
- * Changelog:
- * 10-10-1996 RMK Brought up to date with arch-sa110eval
- * 22-08-1998 RMK Restructured IRQ routines
- * 11-08-1999 PJB Created ARM7500 version, derived from RiscPC code
- */
- #include <asm/hardware/iomd.h>
- #include <asm/io.h>
- static inline int fixup_irq(unsigned int irq)
- {
- if (irq == IRQ_ISA) {
- int isabits = *((volatile unsigned int *)0xe002b700);
- if (isabits == 0) {
- printk("Spurious ISA IRQ!n");
- return irq;
- }
- irq = IRQ_ISA_BASE;
- while (!(isabits & 1)) {
- irq++;
- isabits >>= 1;
- }
- }
- return irq;
- }