projects / deliverable / linux.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 | ||
| 41c594ab RB |
27 | #ifdef CONFIG_MIPS_MT_SMTC |
| 28 | /* | |
| 29 | * Clear interrupt mask handling "backstop" if irq_hwmask | |
| 30 | * entry so indicates. This implies that the ack() or end() | |
| 31 | * functions will take over re-enabling the low-level mask. | |
| 32 | * Otherwise it will be done on return from exception. | |
| 33 | */ | |
| 34 | #define __DO_IRQ_SMTC_HOOK() \ | |
| 35 | do { \ | |
| 36 | if (irq_hwmask[irq] & 0x0000ff00) \ | |
| 37 | write_c0_tccontext(read_c0_tccontext() & \ | |
| 38 | ~(irq_hwmask[irq] & 0x0000ff00)); \ | |
| 39 | } while (0) | |
| 40 | #else | |
| 41 | #define __DO_IRQ_SMTC_HOOK() do { } while (0) | |
| 42 | #endif | |
| 43 | ||
| 1da177e4 LT |
44 | /* |
| 45 | * do_IRQ handles all normal device IRQ's (the special | |
| 46 | * SMP cross-CPU interrupts have their own specific | |
| 47 | * handlers). | |
| 48 | * | |
| 49 | * Ideally there should be away to get this into kernel/irq/handle.c to | |
| 50 | * avoid the overhead of a call for just a tiny function ... | |
| 51 | */ | |
| 937a8015 | 52 | #define do_IRQ(irq) \ |
| 1da177e4 LT |
53 | do { \ |
| 54 | irq_enter(); \ | |
| 41c594ab | 55 | __DO_IRQ_SMTC_HOOK(); \ |
| 1417836e | 56 | generic_handle_irq(irq); \ |
| 1da177e4 LT |
57 | irq_exit(); \ |
| 58 | } while (0) | |
| 59 | ||
| 1da177e4 | 60 | extern void arch_init_irq(void); |
| 937a8015 | 61 | extern void spurious_interrupt(void); |
| 1da177e4 | 62 | |
| 41c594ab RB |
63 | #ifdef CONFIG_MIPS_MT_SMTC |
| 64 | struct irqaction; | |
| 65 | ||
| 66 | extern unsigned long irq_hwmask[]; | |
| 67 | extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, | |
| 68 | unsigned long hwmask); | |
| 69 | #endif /* CONFIG_MIPS_MT_SMTC */ | |
| 70 | ||
| 4a4cf779 RB |
71 | extern int allocate_irqno(void); |
| 72 | extern void alloc_legacy_irqno(void); | |
| 73 | extern void free_irqno(unsigned int irq); | |
| 74 | ||
| 1da177e4 | 75 | #endif /* _ASM_IRQ_H */ |