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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> | |
3 | * | |
4 | * Use inline IRQs where possible - Anton Blanchard <anton@au.ibm.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | #ifdef __KERNEL__ | |
12 | #ifndef _PPC64_HW_IRQ_H | |
13 | #define _PPC64_HW_IRQ_H | |
14 | ||
15 | #include <linux/config.h> | |
16 | #include <linux/errno.h> | |
17 | #include <asm/irq.h> | |
18 | ||
19 | int timer_interrupt(struct pt_regs *); | |
20 | extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq); | |
21 | ||
22 | #ifdef CONFIG_PPC_ISERIES | |
23 | ||
24 | extern unsigned long local_get_flags(void); | |
25 | extern unsigned long local_irq_disable(void); | |
26 | extern void local_irq_restore(unsigned long); | |
27 | ||
28 | #define local_irq_enable() local_irq_restore(1) | |
29 | #define local_save_flags(flags) ((flags) = local_get_flags()) | |
30 | #define local_irq_save(flags) ((flags) = local_irq_disable()) | |
31 | ||
32 | #define irqs_disabled() (local_get_flags() == 0) | |
33 | ||
34 | #else | |
35 | ||
36 | #define local_save_flags(flags) ((flags) = mfmsr()) | |
37 | #define local_irq_restore(flags) do { \ | |
38 | __asm__ __volatile__("": : :"memory"); \ | |
39 | __mtmsrd((flags), 1); \ | |
40 | } while(0) | |
41 | ||
42 | static inline void local_irq_disable(void) | |
43 | { | |
44 | unsigned long msr; | |
45 | msr = mfmsr(); | |
46 | __mtmsrd(msr & ~MSR_EE, 1); | |
47 | __asm__ __volatile__("": : :"memory"); | |
48 | } | |
49 | ||
50 | static inline void local_irq_enable(void) | |
51 | { | |
52 | unsigned long msr; | |
53 | __asm__ __volatile__("": : :"memory"); | |
54 | msr = mfmsr(); | |
55 | __mtmsrd(msr | MSR_EE, 1); | |
56 | } | |
57 | ||
58 | static inline void __do_save_and_cli(unsigned long *flags) | |
59 | { | |
60 | unsigned long msr; | |
61 | msr = mfmsr(); | |
62 | *flags = msr; | |
63 | __mtmsrd(msr & ~MSR_EE, 1); | |
64 | __asm__ __volatile__("": : :"memory"); | |
65 | } | |
66 | ||
67 | #define local_irq_save(flags) __do_save_and_cli(&flags) | |
68 | ||
69 | #define irqs_disabled() \ | |
70 | ({ \ | |
71 | unsigned long flags; \ | |
72 | local_save_flags(flags); \ | |
73 | !(flags & MSR_EE); \ | |
74 | }) | |
75 | ||
76 | #endif /* CONFIG_PPC_ISERIES */ | |
77 | ||
78 | #define mask_irq(irq) \ | |
79 | ({ \ | |
80 | irq_desc_t *desc = get_irq_desc(irq); \ | |
81 | if (desc->handler && desc->handler->disable) \ | |
82 | desc->handler->disable(irq); \ | |
83 | }) | |
84 | #define unmask_irq(irq) \ | |
85 | ({ \ | |
86 | irq_desc_t *desc = get_irq_desc(irq); \ | |
87 | if (desc->handler && desc->handler->enable) \ | |
88 | desc->handler->enable(irq); \ | |
89 | }) | |
90 | #define ack_irq(irq) \ | |
91 | ({ \ | |
92 | irq_desc_t *desc = get_irq_desc(irq); \ | |
93 | if (desc->handler && desc->handler->ack) \ | |
94 | desc->handler->ack(irq); \ | |
95 | }) | |
96 | ||
97 | /* Should we handle this via lost interrupts and IPIs or should we don't care like | |
98 | * we do now ? --BenH. | |
99 | */ | |
100 | struct hw_interrupt_type; | |
101 | static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {} | |
102 | ||
103 | #endif /* _PPC64_HW_IRQ_H */ | |
104 | #endif /* __KERNEL__ */ |