| Sam Ravnborg | f5e706a | 2008-07-17 21:55:51 -0700 | [diff] [blame^] | 1 | /* |
| 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 | |
| 17 | #ifndef _LINUX_BITOPS_H |
| 18 | #error only <linux/bitops.h> can be included directly |
| 19 | #endif |
| 20 | |
| 21 | extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask); |
| 22 | extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask); |
| 23 | extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask); |
| 24 | |
| 25 | /* |
| 26 | * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0' |
| 27 | * is in the highest of the four bytes and bit '31' is the high bit |
| 28 | * within the first byte. Sparc is BIG-Endian. Unless noted otherwise |
| 29 | * all bit-ops return 0 if bit was previously clear and != 0 otherwise. |
| 30 | */ |
| 31 | static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr) |
| 32 | { |
| 33 | unsigned long *ADDR, mask; |
| 34 | |
| 35 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 36 | mask = 1 << (nr & 31); |
| 37 | |
| 38 | return ___set_bit(ADDR, mask) != 0; |
| 39 | } |
| 40 | |
| 41 | static inline void set_bit(unsigned long nr, volatile unsigned long *addr) |
| 42 | { |
| 43 | unsigned long *ADDR, mask; |
| 44 | |
| 45 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 46 | mask = 1 << (nr & 31); |
| 47 | |
| 48 | (void) ___set_bit(ADDR, mask); |
| 49 | } |
| 50 | |
| 51 | static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) |
| 52 | { |
| 53 | unsigned long *ADDR, mask; |
| 54 | |
| 55 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 56 | mask = 1 << (nr & 31); |
| 57 | |
| 58 | return ___clear_bit(ADDR, mask) != 0; |
| 59 | } |
| 60 | |
| 61 | static inline void clear_bit(unsigned long nr, volatile unsigned long *addr) |
| 62 | { |
| 63 | unsigned long *ADDR, mask; |
| 64 | |
| 65 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 66 | mask = 1 << (nr & 31); |
| 67 | |
| 68 | (void) ___clear_bit(ADDR, mask); |
| 69 | } |
| 70 | |
| 71 | static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr) |
| 72 | { |
| 73 | unsigned long *ADDR, mask; |
| 74 | |
| 75 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 76 | mask = 1 << (nr & 31); |
| 77 | |
| 78 | return ___change_bit(ADDR, mask) != 0; |
| 79 | } |
| 80 | |
| 81 | static inline void change_bit(unsigned long nr, volatile unsigned long *addr) |
| 82 | { |
| 83 | unsigned long *ADDR, mask; |
| 84 | |
| 85 | ADDR = ((unsigned long *) addr) + (nr >> 5); |
| 86 | mask = 1 << (nr & 31); |
| 87 | |
| 88 | (void) ___change_bit(ADDR, mask); |
| 89 | } |
| 90 | |
| 91 | #include <asm-generic/bitops/non-atomic.h> |
| 92 | |
| 93 | #define smp_mb__before_clear_bit() do { } while(0) |
| 94 | #define smp_mb__after_clear_bit() do { } while(0) |
| 95 | |
| 96 | #include <asm-generic/bitops/ffz.h> |
| 97 | #include <asm-generic/bitops/__ffs.h> |
| 98 | #include <asm-generic/bitops/sched.h> |
| 99 | #include <asm-generic/bitops/ffs.h> |
| 100 | #include <asm-generic/bitops/fls.h> |
| 101 | #include <asm-generic/bitops/fls64.h> |
| 102 | #include <asm-generic/bitops/hweight.h> |
| 103 | #include <asm-generic/bitops/lock.h> |
| 104 | #include <asm-generic/bitops/find.h> |
| 105 | #include <asm-generic/bitops/ext2-non-atomic.h> |
| 106 | #include <asm-generic/bitops/ext2-atomic.h> |
| 107 | #include <asm-generic/bitops/minix.h> |
| 108 | |
| 109 | #endif /* __KERNEL__ */ |
| 110 | |
| 111 | #endif /* defined(_SPARC_BITOPS_H) */ |