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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | #ifndef __BITOPS__ |
| 2 | #define __BITOPS__ |
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| 3 | |||
| 4 | #include <linux/compatib.h> |
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| 5 | |||
| 6 | #define LOCK_PREFIX "" |
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| 7 | #define SMPVOL |
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| 8 | |||
| 9 | /* |
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| 10 | * Some hacks to defeat gcc over-optimizations.. |
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| 11 | */ |
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| 12 | struct __dummy { unsigned long a[100]; }; |
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| 13 | #define ADDR (*(struct __dummy *) addr) |
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| 14 | #define CONST_ADDR (*(const struct __dummy *) addr) |
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| 15 | |||
| 16 | extern __inline__ int set_bit(int nr, SMPVOL void * addr) |
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| 17 | { |
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| 18 | int oldbit; |
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| 19 | |||
| 20 | __asm__ __volatile__(LOCK_PREFIX |
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| 21 | "btsl %2,%1\n\tsbbl %0,%0" |
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| 22 | :"=r" (oldbit),"=m" (ADDR) |
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| 23 | :"ir" (nr)); |
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| 24 | return oldbit; |
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| 25 | } |
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| 26 | |||
| 27 | extern __inline__ int clear_bit(int nr, SMPVOL void * addr) |
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| 28 | { |
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| 29 | int oldbit; |
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| 30 | |||
| 31 | __asm__ __volatile__(LOCK_PREFIX |
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| 32 | "btrl %2,%1\n\tsbbl %0,%0" |
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| 33 | :"=r" (oldbit),"=m" (ADDR) |
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| 34 | :"ir" (nr)); |
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| 35 | return oldbit; |
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| 36 | } |
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| 37 | |||
| 38 | extern __inline__ int test_bit(int nr, const SMPVOL void * addr) |
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| 39 | { |
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| 40 | return ((1UL << (nr & 31)) & (((const unsigned int *) addr)[nr >> 5])) != 0; |
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| 41 | } |
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| 42 | |||
| 43 | #endif |