1/* $Id: bitops.h,v 1.1.1.1 2007/08/03 18:53:36 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/compiler.h> 11#include <asm/byteorder.h> 12 13extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr); 14extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr); 15extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr); 16extern void set_bit(unsigned long nr, volatile unsigned long *addr); 17extern void clear_bit(unsigned long nr, volatile unsigned long *addr); 18extern void change_bit(unsigned long nr, volatile unsigned long *addr); 19 20#include <asm-generic/bitops/non-atomic.h> 21 22#ifdef CONFIG_SMP 23#define smp_mb__before_clear_bit() membar_storeload_loadload() 24#define smp_mb__after_clear_bit() membar_storeload_storestore() 25#else 26#define smp_mb__before_clear_bit() barrier() 27#define smp_mb__after_clear_bit() barrier() 28#endif 29 30#include <asm-generic/bitops/ffz.h> 31#include <asm-generic/bitops/__ffs.h> 32#include <asm-generic/bitops/fls.h> 33#include <asm-generic/bitops/fls64.h> 34 35#ifdef __KERNEL__ 36 37#include <asm-generic/bitops/sched.h> 38#include <asm-generic/bitops/ffs.h> 39 40/* 41 * hweightN: returns the hamming weight (i.e. the number 42 * of bits set) of a N-bit word 43 */ 44 45#ifdef ULTRA_HAS_POPULATION_COUNT 46 47static inline unsigned int hweight64(unsigned long w) 48{ 49 unsigned int res; 50 51 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w)); 52 return res; 53} 54 55static inline unsigned int hweight32(unsigned int w) 56{ 57 unsigned int res; 58 59 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff)); 60 return res; 61} 62 63static inline unsigned int hweight16(unsigned int w) 64{ 65 unsigned int res; 66 67 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff)); 68 return res; 69} 70 71static inline unsigned int hweight8(unsigned int w) 72{ 73 unsigned int res; 74 75 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff)); 76 return res; 77} 78 79#else 80 81#include <asm-generic/bitops/hweight.h> 82 83#endif 84#endif /* __KERNEL__ */ 85 86#include <asm-generic/bitops/find.h> 87 88#ifdef __KERNEL__ 89 90#include <asm-generic/bitops/ext2-non-atomic.h> 91 92#define ext2_set_bit_atomic(lock,nr,addr) \ 93 test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr)) 94#define ext2_clear_bit_atomic(lock,nr,addr) \ 95 test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr)) 96 97#include <asm-generic/bitops/minix.h> 98 99#endif /* __KERNEL__ */ 100 101#endif /* defined(_SPARC64_BITOPS_H) */ 102