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bitops.h

bitops.h 2.1 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2012 ARM Ltd.
    3. 

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or modify
    5. 

  5.  * it under the terms of the GNU General Public License version 2 as
    6. 

  6.  * published by the Free Software Foundation.
    7. 

  7.  *
    8. 

  8.  * This program is distributed in the hope that it will be useful,
    9. 

  9.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    10. 

  10.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11. 

  11.  * GNU General Public License for more details.
    12. 

  12.  *
    13. 

  13.  * You should have received a copy of the GNU General Public License
    14. 

  14.  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    15. 

  15.  */
    16. 

  16. #ifndef __ASM_BITOPS_H
    17. 

  17. #define __ASM_BITOPS_H
    18. 

  18. 

  19. #include <linux/compiler.h>
    20. 

  20. 

  21. #include <asm/barrier.h>
    22. 

  22. 

  23. /*
    24. 

  24.  * clear_bit may not imply a memory barrier
    25. 

  25.  */
    26. 

  26. #ifndef smp_mb__before_clear_bit
    27. 

  27. #define smp_mb__before_clear_bit()	smp_mb()
    28. 

  28. #define smp_mb__after_clear_bit()	smp_mb()
    29. 

  29. #endif
    30. 

  30. 

  31. #ifndef _LINUX_BITOPS_H
    32. 

  32. #error only <linux/bitops.h> can be included directly
    33. 

  33. #endif
    34. 

  34. 

  35. /*
    36. 

  36.  * Little endian assembly atomic bitops.
    37. 

  37.  */
    38. 

  38. extern void set_bit(int nr, volatile unsigned long *p);
    39. 

  39. extern void clear_bit(int nr, volatile unsigned long *p);
    40. 

  40. extern void change_bit(int nr, volatile unsigned long *p);
    41. 

  41. extern int test_and_set_bit(int nr, volatile unsigned long *p);
    42. 

  42. extern int test_and_clear_bit(int nr, volatile unsigned long *p);
    43. 

  43. extern int test_and_change_bit(int nr, volatile unsigned long *p);
    44. 

  44. 

  45. #include <asm-generic/bitops/builtin-__ffs.h>
    46. 

  46. #include <asm-generic/bitops/builtin-ffs.h>
    47. 

  47. #include <asm-generic/bitops/builtin-__fls.h>
    48. 

  48. #include <asm-generic/bitops/builtin-fls.h>
    49. 

  49. 

  50. #include <asm-generic/bitops/ffz.h>
    51. 

  51. #include <asm-generic/bitops/fls64.h>
    52. 

  52. #include <asm-generic/bitops/find.h>
    53. 

  53. 

  54. #include <asm-generic/bitops/sched.h>
    55. 

  55. #include <asm-generic/bitops/hweight.h>
    56. 

  56. #include <asm-generic/bitops/lock.h>
    57. 

  57. 

  58. #include <asm-generic/bitops/non-atomic.h>
    59. 

  59. #include <asm-generic/bitops/le.h>
    60. 

  60. 

  61. /*
    62. 

  62.  * Ext2 is defined to use little-endian byte ordering.
    63. 

  63.  */
    64. 

  64. #define ext2_set_bit_atomic(lock, nr, p)	test_and_set_bit_le(nr, p)
    65. 

  65. #define ext2_clear_bit_atomic(lock, nr, p)	test_and_clear_bit_le(nr, p)
    66. 

  66. 

  67. #endif /* __ASM_BITOPS_H */
    68.