projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $ |
| 2 | * bitops.h: Bit string operations on the Sparc. | |
| 3 | * | |
| 4 | * Copyright 1995 David S. Miller (davem@caip.rutgers.edu) | |
| 5 | * Copyright 1996 Eddie C. Dost (ecd@skynet.be) | |
| 6 | * Copyright 2001 Anton Blanchard (anton@samba.org) | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef _SPARC_BITOPS_H | |
| 10 | #define _SPARC_BITOPS_H | |
| 11 | ||
| 12 | #include <linux/compiler.h> | |
| 13 | #include <asm/byteorder.h> | |
| 14 | ||
| 15 | #ifdef __KERNEL__ | |
| 16 | ||
| 8a8b836b DM |
17 | extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask); |
| 18 | extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask); | |
| 19 | extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask); | |
| 20 | ||
| 1da177e4 LT |
21 | /* |
| 22 | * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0' | |
| 23 | * is in the highest of the four bytes and bit '31' is the high bit | |
| 24 | * within the first byte. Sparc is BIG-Endian. Unless noted otherwise | |
| 25 | * all bit-ops return 0 if bit was previously clear and != 0 otherwise. | |
| 26 | */ | |
| 27 | static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr) | |
| 28 | { | |
| 8a8b836b | 29 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
30 | |
| 31 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 32 | mask = 1 << (nr & 31); | |
| 33 | ||
| 8a8b836b | 34 | return ___set_bit(ADDR, mask) != 0; |
| 1da177e4 LT |
35 | } |
| 36 | ||
| 37 | static inline void set_bit(unsigned long nr, volatile unsigned long *addr) | |
| 38 | { | |
| 8a8b836b | 39 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
40 | |
| 41 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 42 | mask = 1 << (nr & 31); | |
| 43 | ||
| 8a8b836b | 44 | (void) ___set_bit(ADDR, mask); |
| 1da177e4 LT |
45 | } |
| 46 | ||
| 47 | static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) | |
| 48 | { | |
| 8a8b836b | 49 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
50 | |
| 51 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 52 | mask = 1 << (nr & 31); | |
| 53 | ||
| 8a8b836b | 54 | return ___clear_bit(ADDR, mask) != 0; |
| 1da177e4 LT |
55 | } |
| 56 | ||
| 57 | static inline void clear_bit(unsigned long nr, volatile unsigned long *addr) | |
| 58 | { | |
| 8a8b836b | 59 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
60 | |
| 61 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 62 | mask = 1 << (nr & 31); | |
| 63 | ||
| 8a8b836b | 64 | (void) ___clear_bit(ADDR, mask); |
| 1da177e4 LT |
65 | } |
| 66 | ||
| 67 | static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr) | |
| 68 | { | |
| 8a8b836b | 69 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
70 | |
| 71 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 72 | mask = 1 << (nr & 31); | |
| 73 | ||
| 8a8b836b | 74 | return ___change_bit(ADDR, mask) != 0; |
| 1da177e4 LT |
75 | } |
| 76 | ||
| 77 | static inline void change_bit(unsigned long nr, volatile unsigned long *addr) | |
| 78 | { | |
| 8a8b836b | 79 | unsigned long *ADDR, mask; |
| 1da177e4 LT |
80 | |
| 81 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
| 82 | mask = 1 << (nr & 31); | |
| 83 | ||
| 8a8b836b | 84 | (void) ___change_bit(ADDR, mask); |
| 1da177e4 LT |
85 | } |
| 86 | ||
| d59288b7 | 87 | #include <asm-generic/bitops/non-atomic.h> |
| 1da177e4 LT |
88 | |
| 89 | #define smp_mb__before_clear_bit() do { } while(0) | |
| 90 | #define smp_mb__after_clear_bit() do { } while(0) | |
| 91 | ||
| d59288b7 AM |
92 | #include <asm-generic/bitops/ffz.h> |
| 93 | #include <asm-generic/bitops/__ffs.h> | |
| 94 | #include <asm-generic/bitops/sched.h> | |
| 95 | #include <asm-generic/bitops/ffs.h> | |
| 96 | #include <asm-generic/bitops/fls.h> | |
| 97 | #include <asm-generic/bitops/fls64.h> | |
| 98 | #include <asm-generic/bitops/hweight.h> | |
| 99 | #include <asm-generic/bitops/find.h> | |
| 100 | #include <asm-generic/bitops/ext2-non-atomic.h> | |
| 101 | #include <asm-generic/bitops/ext2-atomic.h> | |
| 102 | #include <asm-generic/bitops/minix.h> | |
| 1da177e4 LT |
103 | |
| 104 | #endif /* __KERNEL__ */ | |
| 105 | ||
| 106 | #endif /* defined(_SPARC_BITOPS_H) */ |