Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004-2009 Analog Devices Inc. |
| 3 | * |
| 4 | * Licensed under the GPL-2 or later. |
| 5 | */ |
| 6 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 7 | #ifndef _BLACKFIN_BITOPS_H |
| 8 | #define _BLACKFIN_BITOPS_H |
| 9 | |
Michael Hennerich | 0f7b468 | 2009-12-22 11:32:06 +0000 | [diff] [blame^] | 10 | #include <linux/compiler.h> |
| 11 | |
| 12 | #include <asm-generic/bitops/__ffs.h> |
| 13 | #include <asm-generic/bitops/ffz.h> |
| 14 | #include <asm-generic/bitops/fls.h> |
| 15 | #include <asm-generic/bitops/__fls.h> |
| 16 | #include <asm-generic/bitops/fls64.h> |
| 17 | #include <asm-generic/bitops/find.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 18 | |
Jiri Slaby | 0624517 | 2007-10-18 23:40:26 -0700 | [diff] [blame] | 19 | #ifndef _LINUX_BITOPS_H |
| 20 | #error only <linux/bitops.h> can be included directly |
| 21 | #endif |
| 22 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 23 | #include <asm-generic/bitops/sched.h> |
Michael Hennerich | 0f7b468 | 2009-12-22 11:32:06 +0000 | [diff] [blame^] | 24 | #include <asm-generic/bitops/ffs.h> |
| 25 | #include <asm-generic/bitops/lock.h> |
| 26 | #include <asm-generic/bitops/ext2-non-atomic.h> |
| 27 | #include <asm-generic/bitops/ext2-atomic.h> |
| 28 | #include <asm-generic/bitops/minix.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 29 | |
Michael Hennerich | 0f7b468 | 2009-12-22 11:32:06 +0000 | [diff] [blame^] | 30 | #ifndef CONFIG_SMP |
| 31 | #include <linux/irqflags.h> |
| 32 | |
| 33 | /* |
| 34 | * clear_bit may not imply a memory barrier |
| 35 | */ |
| 36 | #ifndef smp_mb__before_clear_bit |
| 37 | #define smp_mb__before_clear_bit() smp_mb() |
| 38 | #define smp_mb__after_clear_bit() smp_mb() |
| 39 | #endif |
| 40 | #include <asm-generic/bitops/atomic.h> |
| 41 | #include <asm-generic/bitops/non-atomic.h> |
| 42 | #else |
| 43 | |
| 44 | #include <asm/byteorder.h> /* swab32 */ |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 45 | #include <linux/linkage.h> |
| 46 | |
| 47 | asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr); |
| 48 | |
| 49 | asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr); |
| 50 | |
| 51 | asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr); |
| 52 | |
| 53 | asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr); |
| 54 | |
| 55 | asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr); |
| 56 | |
| 57 | asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr); |
| 58 | |
| 59 | asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr); |
| 60 | |
| 61 | static inline void set_bit(int nr, volatile unsigned long *addr) |
| 62 | { |
| 63 | volatile unsigned long *a = addr + (nr >> 5); |
| 64 | __raw_bit_set_asm(a, nr & 0x1f); |
| 65 | } |
| 66 | |
| 67 | static inline void clear_bit(int nr, volatile unsigned long *addr) |
| 68 | { |
| 69 | volatile unsigned long *a = addr + (nr >> 5); |
| 70 | __raw_bit_clear_asm(a, nr & 0x1f); |
| 71 | } |
| 72 | |
| 73 | static inline void change_bit(int nr, volatile unsigned long *addr) |
| 74 | { |
| 75 | volatile unsigned long *a = addr + (nr >> 5); |
| 76 | __raw_bit_toggle_asm(a, nr & 0x1f); |
| 77 | } |
| 78 | |
| 79 | static inline int test_bit(int nr, const volatile unsigned long *addr) |
| 80 | { |
| 81 | volatile const unsigned long *a = addr + (nr >> 5); |
| 82 | return __raw_bit_test_asm(a, nr & 0x1f) != 0; |
| 83 | } |
| 84 | |
| 85 | static inline int test_and_set_bit(int nr, volatile unsigned long *addr) |
| 86 | { |
| 87 | volatile unsigned long *a = addr + (nr >> 5); |
| 88 | return __raw_bit_test_set_asm(a, nr & 0x1f); |
| 89 | } |
| 90 | |
| 91 | static inline int test_and_clear_bit(int nr, volatile unsigned long *addr) |
| 92 | { |
| 93 | volatile unsigned long *a = addr + (nr >> 5); |
| 94 | return __raw_bit_test_clear_asm(a, nr & 0x1f); |
| 95 | } |
| 96 | |
| 97 | static inline int test_and_change_bit(int nr, volatile unsigned long *addr) |
| 98 | { |
| 99 | volatile unsigned long *a = addr + (nr >> 5); |
| 100 | return __raw_bit_test_toggle_asm(a, nr & 0x1f); |
| 101 | } |
| 102 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 103 | /* |
| 104 | * clear_bit() doesn't provide any barrier for the compiler. |
| 105 | */ |
| 106 | #define smp_mb__before_clear_bit() barrier() |
| 107 | #define smp_mb__after_clear_bit() barrier() |
| 108 | |
Mike Frysinger | 3d15063 | 2009-06-13 11:21:51 -0400 | [diff] [blame] | 109 | #include <asm-generic/bitops/non-atomic.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 110 | |
Mike Frysinger | 3d15063 | 2009-06-13 11:21:51 -0400 | [diff] [blame] | 111 | #endif /* CONFIG_SMP */ |
| 112 | |
Michael Hennerich | 0f7b468 | 2009-12-22 11:32:06 +0000 | [diff] [blame^] | 113 | /* |
| 114 | * hweightN: returns the hamming weight (i.e. the number |
| 115 | * of bits set) of a N-bit word |
| 116 | */ |
| 117 | |
| 118 | static inline unsigned int hweight32(unsigned int w) |
| 119 | { |
| 120 | unsigned int res; |
| 121 | |
| 122 | __asm__ ("%0.l = ONES %0;" |
| 123 | "%0 = %0.l (Z);" |
| 124 | : "=d" (res) : "d" (w)); |
| 125 | return res; |
| 126 | } |
| 127 | |
| 128 | static inline unsigned int hweight64(__u64 w) |
| 129 | { |
| 130 | return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w); |
| 131 | } |
| 132 | |
| 133 | static inline unsigned int hweight16(unsigned int w) |
| 134 | { |
| 135 | return hweight32(w & 0xffff); |
| 136 | } |
| 137 | |
| 138 | static inline unsigned int hweight8(unsigned int w) |
| 139 | { |
| 140 | return hweight32(w & 0xff); |
| 141 | } |
| 142 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 143 | #endif /* _BLACKFIN_BITOPS_H */ |