]>
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 | ||
937a8015 | 27 | extern asmlinkage unsigned int do_IRQ(unsigned int irq); |
1da177e4 | 28 | |
41c594ab RB |
29 | #ifdef CONFIG_MIPS_MT_SMTC |
30 | /* | |
31 | * Clear interrupt mask handling "backstop" if irq_hwmask | |
32 | * entry so indicates. This implies that the ack() or end() | |
33 | * functions will take over re-enabling the low-level mask. | |
34 | * Otherwise it will be done on return from exception. | |
35 | */ | |
36 | #define __DO_IRQ_SMTC_HOOK() \ | |
37 | do { \ | |
38 | if (irq_hwmask[irq] & 0x0000ff00) \ | |
39 | write_c0_tccontext(read_c0_tccontext() & \ | |
40 | ~(irq_hwmask[irq] & 0x0000ff00)); \ | |
41 | } while (0) | |
42 | #else | |
43 | #define __DO_IRQ_SMTC_HOOK() do { } while (0) | |
44 | #endif | |
45 | ||
fe00f943 | 46 | #ifdef CONFIG_PREEMPT |
1da177e4 LT |
47 | |
48 | /* | |
49 | * do_IRQ handles all normal device IRQ's (the special | |
50 | * SMP cross-CPU interrupts have their own specific | |
51 | * handlers). | |
52 | * | |
53 | * Ideally there should be away to get this into kernel/irq/handle.c to | |
54 | * avoid the overhead of a call for just a tiny function ... | |
55 | */ | |
937a8015 | 56 | #define do_IRQ(irq) \ |
1da177e4 LT |
57 | do { \ |
58 | irq_enter(); \ | |
41c594ab | 59 | __DO_IRQ_SMTC_HOOK(); \ |
1417836e | 60 | generic_handle_irq(irq); \ |
1da177e4 LT |
61 | irq_exit(); \ |
62 | } while (0) | |
63 | ||
64 | #endif | |
65 | ||
66 | extern void arch_init_irq(void); | |
937a8015 | 67 | extern void spurious_interrupt(void); |
1da177e4 | 68 | |
41c594ab RB |
69 | #ifdef CONFIG_MIPS_MT_SMTC |
70 | struct irqaction; | |
71 | ||
72 | extern unsigned long irq_hwmask[]; | |
73 | extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, | |
74 | unsigned long hwmask); | |
75 | #endif /* CONFIG_MIPS_MT_SMTC */ | |
76 | ||
4a4cf779 RB |
77 | extern int allocate_irqno(void); |
78 | extern void alloc_legacy_irqno(void); | |
79 | extern void free_irqno(unsigned int irq); | |
80 | ||
1da177e4 | 81 | #endif /* _ASM_IRQ_H */ |