arch/blackfin/include/asm/bitops.h

   1 #ifndef _BLACKFIN_BITOPS_H
   2 #define _BLACKFIN_BITOPS_H
   3
   4 /*
   5  * Copyright 1992, Linus Torvalds.
   6  */
   7
   8 #include <linux/compiler.h>
   9 #include <asm/byteorder.h>      /* swab32 */
  10 #include <asm/system.h>         /* save_flags */
  11
  12 #ifdef __KERNEL__
  13
  14 #ifndef _LINUX_BITOPS_H
  15 #error only <linux/bitops.h> can be included directly
  16 #endif
  17
  18 #include <asm-generic/bitops/ffs.h>
  19 #include <asm-generic/bitops/__ffs.h>
  20 #include <asm-generic/bitops/sched.h>
  21 #include <asm-generic/bitops/ffz.h>
  22
  23 static __inline__ void set_bit(int nr, volatile unsigned long *addr)
  24 {
  25         int *a = (int *)addr;
  26         int mask;
  27         unsigned long flags;
  28
  29         a += nr >> 5;
  30         mask = 1 << (nr & 0x1f);
  31         local_irq_save(flags);
  32         *a |= mask;
  33         local_irq_restore(flags);
  34 }
  35
  36 static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
  37 {
  38         int *a = (int *)addr;
  39         int mask;
  40
  41         a += nr >> 5;
  42         mask = 1 << (nr & 0x1f);
  43         *a |= mask;
  44 }
  45
  46 /*
  47  * clear_bit() doesn't provide any barrier for the compiler.
  48  */
  49 #define smp_mb__before_clear_bit()      barrier()
  50 #define smp_mb__after_clear_bit()       barrier()
  51
  52 static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
  53 {
  54         int *a = (int *)addr;
  55         int mask;
  56         unsigned long flags;
  57         a += nr >> 5;
  58         mask = 1 << (nr & 0x1f);
  59         local_irq_save(flags);
  60         *a &= ~mask;
  61         local_irq_restore(flags);
  62 }
  63
  64 static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
  65 {
  66         int *a = (int *)addr;
  67         int mask;
  68
  69         a += nr >> 5;
  70         mask = 1 << (nr & 0x1f);
  71         *a &= ~mask;
  72 }
  73
  74 static __inline__ void change_bit(int nr, volatile unsigned long *addr)
  75 {
  76         int mask, flags;
  77         unsigned long *ADDR = (unsigned long *)addr;
  78
  79         ADDR += nr >> 5;
  80         mask = 1 << (nr & 31);
  81         local_irq_save(flags);
  82         *ADDR ^= mask;
  83         local_irq_restore(flags);
  84 }
  85
  86 static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
  87 {
  88         int mask;
  89         unsigned long *ADDR = (unsigned long *)addr;
  90
  91         ADDR += nr >> 5;
  92         mask = 1 << (nr & 31);
  93         *ADDR ^= mask;
  94 }
  95
  96 static __inline__ int test_and_set_bit(int nr, void *addr)
  97 {
  98         int mask, retval;
  99         volatile unsigned int *a = (volatile unsigned int *)addr;
 100         unsigned long flags;
 101
 102         a += nr >> 5;
 103         mask = 1 << (nr & 0x1f);
 104         local_irq_save(flags);
 105         retval = (mask & *a) != 0;
 106         *a |= mask;
 107         local_irq_restore(flags);
 108
 109         return retval;
 110 }
 111
 112 static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr)
 113 {
 114         int mask, retval;
 115         volatile unsigned int *a = (volatile unsigned int *)addr;
 116
 117         a += nr >> 5;
 118         mask = 1 << (nr & 0x1f);
 119         retval = (mask & *a) != 0;
 120         *a |= mask;
 121         return retval;
 122 }
 123
 124 static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
 125 {
 126         int mask, retval;
 127         volatile unsigned int *a = (volatile unsigned int *)addr;
 128         unsigned long flags;
 129
 130         a += nr >> 5;
 131         mask = 1 << (nr & 0x1f);
 132         local_irq_save(flags);
 133         retval = (mask & *a) != 0;
 134         *a &= ~mask;
 135         local_irq_restore(flags);
 136
 137         return retval;
 138 }
 139
 140 static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
 141 {
 142         int mask, retval;
 143         volatile unsigned int *a = (volatile unsigned int *)addr;
 144
 145         a += nr >> 5;
 146         mask = 1 << (nr & 0x1f);
 147         retval = (mask & *a) != 0;
 148         *a &= ~mask;
 149         return retval;
 150 }
 151
 152 static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr)
 153 {
 154         int mask, retval;
 155         volatile unsigned int *a = (volatile unsigned int *)addr;
 156         unsigned long flags;
 157
 158         a += nr >> 5;
 159         mask = 1 << (nr & 0x1f);
 160         local_irq_save(flags);
 161         retval = (mask & *a) != 0;
 162         *a ^= mask;
 163         local_irq_restore(flags);
 164         return retval;
 165 }
 166
 167 static __inline__ int __test_and_change_bit(int nr,
 168                                             volatile unsigned long *addr)
 169 {
 170         int mask, retval;
 171         volatile unsigned int *a = (volatile unsigned int *)addr;
 172
 173         a += nr >> 5;
 174         mask = 1 << (nr & 0x1f);
 175         retval = (mask & *a) != 0;
 176         *a ^= mask;
 177         return retval;
 178 }
 179
 180 /*
 181  * This routine doesn't need to be atomic.
 182  */
 183 static __inline__ int __constant_test_bit(int nr, const void *addr)
 184 {
 185         return ((1UL << (nr & 31)) &
 186                 (((const volatile unsigned int *)addr)[nr >> 5])) != 0;
 187 }
 188
 189 static __inline__ int __test_bit(int nr, const void *addr)
 190 {
 191         int *a = (int *)addr;
 192         int mask;
 193
 194         a += nr >> 5;
 195         mask = 1 << (nr & 0x1f);
 196         return ((mask & *a) != 0);
 197 }
 198
 199 #define test_bit(nr,addr) \
 200 (__builtin_constant_p(nr) ? \
 201  __constant_test_bit((nr),(addr)) : \
 202  __test_bit((nr),(addr)))
 203
 204 #include <asm-generic/bitops/find.h>
 205 #include <asm-generic/bitops/hweight.h>
 206 #include <asm-generic/bitops/lock.h>
 207
 208 #include <asm-generic/bitops/ext2-atomic.h>
 209 #include <asm-generic/bitops/ext2-non-atomic.h>
 210
 211 #include <asm-generic/bitops/minix.h>
 212
 213 #endif                          /* __KERNEL__ */
 214
 215 #include <asm-generic/bitops/fls.h>
 216 #include <asm-generic/bitops/fls64.h>
 217
 218 #endif                          /* _BLACKFIN_BITOPS_H */