projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle | |
| 7 | * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle | |
| 8 | */ | |
| 9 | #ifndef _ASM_IRQ_H | |
| 10 | #define _ASM_IRQ_H | |
| 11 | ||
| 1da177e4 | 12 | #include <linux/linkage.h> |
| 41c594ab RB |
13 | |
| 14 | #include <asm/mipsmtregs.h> | |
| 15 | ||
| 1da177e4 LT |
16 | #include <irq.h> |
| 17 | ||
| 18 | #ifdef CONFIG_I8259 | |
| 19 | static inline int irq_canonicalize(int irq) | |
| 20 | { | |
| 21 | return ((irq == 2) ? 9 : irq); | |
| 22 | } | |
| 23 | #else | |
| 24 | #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ | |
| 25 | #endif | |
| 26 | ||
| 27 | struct pt_regs; | |
| 28 | ||
| 1da177e4 LT |
29 | extern asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs); |
| 30 | ||
| 41c594ab RB |
31 | #ifdef CONFIG_MIPS_MT_SMTC |
| 32 | /* | |
| 33 | * Clear interrupt mask handling "backstop" if irq_hwmask | |
| 34 | * entry so indicates. This implies that the ack() or end() | |
| 35 | * functions will take over re-enabling the low-level mask. | |
| 36 | * Otherwise it will be done on return from exception. | |
| 37 | */ | |
| 38 | #define __DO_IRQ_SMTC_HOOK() \ | |
| 39 | do { \ | |
| 40 | if (irq_hwmask[irq] & 0x0000ff00) \ | |
| 41 | write_c0_tccontext(read_c0_tccontext() & \ | |
| 42 | ~(irq_hwmask[irq] & 0x0000ff00)); \ | |
| 43 | } while (0) | |
| 44 | #else | |
| 45 | #define __DO_IRQ_SMTC_HOOK() do { } while (0) | |
| 46 | #endif | |
| 47 | ||
| fe00f943 | 48 | #ifdef CONFIG_PREEMPT |
| 1da177e4 LT |
49 | |
| 50 | /* | |
| 51 | * do_IRQ handles all normal device IRQ's (the special | |
| 52 | * SMP cross-CPU interrupts have their own specific | |
| 53 | * handlers). | |
| 54 | * | |
| 55 | * Ideally there should be away to get this into kernel/irq/handle.c to | |
| 56 | * avoid the overhead of a call for just a tiny function ... | |
| 57 | */ | |
| 58 | #define do_IRQ(irq, regs) \ | |
| 59 | do { \ | |
| 60 | irq_enter(); \ | |
| 41c594ab | 61 | __DO_IRQ_SMTC_HOOK(); \ |
| 1da177e4 LT |
62 | __do_IRQ((irq), (regs)); \ |
| 63 | irq_exit(); \ | |
| 64 | } while (0) | |
| 65 | ||
| 66 | #endif | |
| 67 | ||
| 68 | extern void arch_init_irq(void); | |
| 93373ed4 | 69 | extern void spurious_interrupt(struct pt_regs *regs); |
| 1da177e4 | 70 | |
| 41c594ab RB |
71 | #ifdef CONFIG_MIPS_MT_SMTC |
| 72 | struct irqaction; | |
| 73 | ||
| 74 | extern unsigned long irq_hwmask[]; | |
| 75 | extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, | |
| 76 | unsigned long hwmask); | |
| 77 | #endif /* CONFIG_MIPS_MT_SMTC */ | |
| 78 | ||
| 1da177e4 | 79 | #endif /* _ASM_IRQ_H */ |