1#ifndef __ASM_METAG_BITOPS_H 2#define __ASM_METAG_BITOPS_H 3 4#include <linux/compiler.h> 5#include <asm/barrier.h> 6#include <asm/global_lock.h> 7 8#ifdef CONFIG_SMP 9/* 10 * These functions are the basis of our bit ops. 11 */ 12static inline void set_bit(unsigned int bit, volatile unsigned long *p) 13{ 14 unsigned long flags; 15 unsigned long mask = 1UL << (bit & 31); 16 17 p += bit >> 5; 18 19 __global_lock1(flags); 20 fence(); 21 *p |= mask; 22 __global_unlock1(flags); 23} 24 25static inline void clear_bit(unsigned int bit, volatile unsigned long *p) 26{ 27 unsigned long flags; 28 unsigned long mask = 1UL << (bit & 31); 29 30 p += bit >> 5; 31 32 __global_lock1(flags); 33 fence(); 34 *p &= ~mask; 35 __global_unlock1(flags); 36} 37 38static inline void change_bit(unsigned int bit, volatile unsigned long *p) 39{ 40 unsigned long flags; 41 unsigned long mask = 1UL << (bit & 31); 42 43 p += bit >> 5; 44 45 __global_lock1(flags); 46 fence(); 47 *p ^= mask; 48 __global_unlock1(flags); 49} 50 51static inline int test_and_set_bit(unsigned int bit, volatile unsigned long *p) 52{ 53 unsigned long flags; 54 unsigned long old; 55 unsigned long mask = 1UL << (bit & 31); 56 57 p += bit >> 5; 58 59 __global_lock1(flags); 60 old = *p; 61 if (!(old & mask)) { 62 fence(); 63 *p = old | mask; 64 } 65 __global_unlock1(flags); 66 67 return (old & mask) != 0; 68} 69 70static inline int test_and_clear_bit(unsigned int bit, 71 volatile unsigned long *p) 72{ 73 unsigned long flags; 74 unsigned long old; 75 unsigned long mask = 1UL << (bit & 31); 76 77 p += bit >> 5; 78 79 __global_lock1(flags); 80 old = *p; 81 if (old & mask) { 82 fence(); 83 *p = old & ~mask; 84 } 85 __global_unlock1(flags); 86 87 return (old & mask) != 0; 88} 89 90static inline int test_and_change_bit(unsigned int bit, 91 volatile unsigned long *p) 92{ 93 unsigned long flags; 94 unsigned long old; 95 unsigned long mask = 1UL << (bit & 31); 96 97 p += bit >> 5; 98 99 __global_lock1(flags); 100 fence(); 101 old = *p; 102 *p = old ^ mask; 103 __global_unlock1(flags); 104 105 return (old & mask) != 0; 106} 107 108#else 109#include <asm-generic/bitops/atomic.h> 110#endif /* CONFIG_SMP */ 111 112#include <asm-generic/bitops/non-atomic.h> 113#include <asm-generic/bitops/find.h> 114#include <asm-generic/bitops/ffs.h> 115#include <asm-generic/bitops/__ffs.h> 116#include <asm-generic/bitops/ffz.h> 117#include <asm-generic/bitops/fls.h> 118#include <asm-generic/bitops/__fls.h> 119#include <asm-generic/bitops/fls64.h> 120#include <asm-generic/bitops/hweight.h> 121#include <asm-generic/bitops/lock.h> 122#include <asm-generic/bitops/sched.h> 123#include <asm-generic/bitops/le.h> 124#include <asm-generic/bitops/ext2-atomic.h> 125 126#endif /* __ASM_METAG_BITOPS_H */ 127