Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: bitops.h,v 1.39 2002/01/30 01:40:00 davem Exp $ |
| 2 | * bitops.h: Bit string operations on the V9. |
| 3 | * |
| 4 | * Copyright 1996, 1997 David S. Miller (davem@caip.rutgers.edu) |
| 5 | */ |
| 6 | |
| 7 | #ifndef _SPARC64_BITOPS_H |
| 8 | #define _SPARC64_BITOPS_H |
| 9 | |
| 10 | #include <linux/config.h> |
| 11 | #include <linux/compiler.h> |
| 12 | #include <asm/byteorder.h> |
| 13 | |
| 14 | extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr); |
| 15 | extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr); |
| 16 | extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr); |
| 17 | extern void set_bit(unsigned long nr, volatile unsigned long *addr); |
| 18 | extern void clear_bit(unsigned long nr, volatile unsigned long *addr); |
| 19 | extern void change_bit(unsigned long nr, volatile unsigned long *addr); |
| 20 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 21 | #include <asm-generic/bitops/non-atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #ifdef CONFIG_SMP |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 24 | #define smp_mb__before_clear_bit() membar_storeload_loadload() |
| 25 | #define smp_mb__after_clear_bit() membar_storeload_storestore() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #else |
| 27 | #define smp_mb__before_clear_bit() barrier() |
| 28 | #define smp_mb__after_clear_bit() barrier() |
| 29 | #endif |
| 30 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 31 | #include <asm-generic/bitops/ffz.h> |
| 32 | #include <asm-generic/bitops/__ffs.h> |
| 33 | #include <asm-generic/bitops/fls.h> |
| 34 | #include <asm-generic/bitops/fls64.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #ifdef __KERNEL__ |
| 37 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 38 | #include <asm-generic/bitops/sched.h> |
| 39 | #include <asm-generic/bitops/ffs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * hweightN: returns the hamming weight (i.e. the number |
| 43 | * of bits set) of a N-bit word |
| 44 | */ |
| 45 | |
| 46 | #ifdef ULTRA_HAS_POPULATION_COUNT |
| 47 | |
David S. Miller | 6593eae | 2005-07-24 19:35:28 -0700 | [diff] [blame] | 48 | static inline unsigned int hweight64(unsigned long w) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | unsigned int res; |
| 51 | |
| 52 | __asm__ ("popc %1,%0" : "=r" (res) : "r" (w)); |
| 53 | return res; |
| 54 | } |
| 55 | |
David S. Miller | 6593eae | 2005-07-24 19:35:28 -0700 | [diff] [blame] | 56 | static inline unsigned int hweight32(unsigned int w) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | { |
| 58 | unsigned int res; |
| 59 | |
| 60 | __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff)); |
| 61 | return res; |
| 62 | } |
| 63 | |
David S. Miller | 6593eae | 2005-07-24 19:35:28 -0700 | [diff] [blame] | 64 | static inline unsigned int hweight16(unsigned int w) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
| 66 | unsigned int res; |
| 67 | |
| 68 | __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff)); |
| 69 | return res; |
| 70 | } |
| 71 | |
David S. Miller | 6593eae | 2005-07-24 19:35:28 -0700 | [diff] [blame] | 72 | static inline unsigned int hweight8(unsigned int w) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
| 74 | unsigned int res; |
| 75 | |
| 76 | __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff)); |
| 77 | return res; |
| 78 | } |
| 79 | |
| 80 | #else |
| 81 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 82 | #include <asm-generic/bitops/hweight.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | #endif |
| 85 | #endif /* __KERNEL__ */ |
| 86 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 87 | #include <asm-generic/bitops/find.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | #ifdef __KERNEL__ |
| 90 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 91 | #include <asm-generic/bitops/ext2-non-atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #define ext2_set_bit_atomic(lock,nr,addr) \ |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 94 | test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #define ext2_clear_bit_atomic(lock,nr,addr) \ |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 96 | test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Akinobu Mita | 2d78d4b | 2006-03-26 01:39:40 -0800 | [diff] [blame] | 98 | #include <asm-generic/bitops/minix.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | #endif /* __KERNEL__ */ |
| 101 | |
| 102 | #endif /* defined(_SPARC64_BITOPS_H) */ |