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1da177e4 LT |
1 | #ifndef __UM_SYSTEM_GENERIC_H |
2 | #define __UM_SYSTEM_GENERIC_H | |
3 | ||
4 | #include "asm/arch/system.h" | |
5 | ||
6 | #undef switch_to | |
7 | #undef local_irq_save | |
8 | #undef local_irq_restore | |
9 | #undef local_irq_disable | |
10 | #undef local_irq_enable | |
11 | #undef local_save_flags | |
12 | #undef local_irq_restore | |
13 | #undef local_irq_enable | |
14 | #undef local_irq_disable | |
15 | #undef local_irq_save | |
16 | #undef irqs_disabled | |
17 | ||
18 | extern void *switch_to(void *prev, void *next, void *last); | |
19 | ||
20 | extern int get_signals(void); | |
21 | extern int set_signals(int enable); | |
22 | extern int get_signals(void); | |
23 | extern void block_signals(void); | |
24 | extern void unblock_signals(void); | |
25 | ||
26 | #define local_save_flags(flags) do { typecheck(unsigned long, flags); \ | |
27 | (flags) = get_signals(); } while(0) | |
28 | #define local_irq_restore(flags) do { typecheck(unsigned long, flags); \ | |
29 | set_signals(flags); } while(0) | |
30 | ||
31 | #define local_irq_save(flags) do { local_save_flags(flags); \ | |
32 | local_irq_disable(); } while(0) | |
33 | ||
34 | #define local_irq_enable() unblock_signals() | |
35 | #define local_irq_disable() block_signals() | |
36 | ||
37 | #define irqs_disabled() \ | |
38 | ({ \ | |
39 | unsigned long flags; \ | |
40 | local_save_flags(flags); \ | |
41 | (flags == 0); \ | |
42 | }) | |
43 | ||
44 | extern void *_switch_to(void *prev, void *next, void *last); | |
45 | #define switch_to(prev, next, last) prev = _switch_to(prev, next, last) | |
46 | ||
47 | #endif |