| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-clps7500/include/mach/irq.h |
| 3 | * |
| 4 | * Copyright (C) 1996 Russell King |
| 5 | * Copyright (C) 1999, 2001 Nexus Electronics Ltd. |
| 6 | * |
| 7 | * Changelog: |
| 8 | * 10-10-1996 RMK Brought up to date with arch-sa110eval |
| 9 | * 22-08-1998 RMK Restructured IRQ routines |
| 10 | * 11-08-1999 PJB Created ARM7500 version, derived from RiscPC code |
| 11 | */ |
| 12 | |
| 13 | #include <asm/hardware/iomd.h> |
| 14 | #include <asm/io.h> |
| 15 | |
| 16 | static inline int fixup_irq(unsigned int irq) |
| 17 | { |
| 18 | if (irq == IRQ_ISA) { |
| 19 | int isabits = *((volatile unsigned int *)0xe002b700); |
| 20 | if (isabits == 0) { |
| 21 | printk("Spurious ISA IRQ!\n"); |
| 22 | return irq; |
| 23 | } |
| 24 | irq = IRQ_ISA_BASE; |
| 25 | while (!(isabits & 1)) { |
| 26 | irq++; |
| 27 | isabits >>= 1; |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | return irq; |
| 32 | } |