/arch/sh/include/asm/atomic.h

http://github.com/mirrors/linux · C Header · 40 lines · 23 code · 11 blank · 6 comment · 0 complexity · 7c2c8c86fd35f911319827d92392d897 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #ifndef __ASM_SH_ATOMIC_H
    3. 

  3. #define __ASM_SH_ATOMIC_H
    4. 

  4. 

  5. #if defined(CONFIG_CPU_J2)
    6. 

  6. 

  7. #include <asm-generic/atomic.h>
    8. 

  8. 

  9. #else
    10. 

  10. 

  11. /*
    12. 

  12.  * Atomic operations that C can't guarantee us.  Useful for
    13. 

  13.  * resource counting etc..
    14. 

  14.  *
    15. 

  15.  */
    16. 

  16. 

  17. #include <linux/compiler.h>
    18. 

  18. #include <linux/types.h>
    19. 

  19. #include <asm/cmpxchg.h>
    20. 

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

  21. 

  22. #define ATOMIC_INIT(i)	{ (i) }
    23. 

  23. 

  24. #define atomic_read(v)		READ_ONCE((v)->counter)
    25. 

  25. #define atomic_set(v,i)		WRITE_ONCE((v)->counter, (i))
    26. 

  26. 

  27. #if defined(CONFIG_GUSA_RB)
    28. 

  28. #include <asm/atomic-grb.h>
    29. 

  29. #elif defined(CONFIG_CPU_SH4A)
    30. 

  30. #include <asm/atomic-llsc.h>
    31. 

  31. #else
    32. 

  32. #include <asm/atomic-irq.h>
    33. 

  33. #endif
    34. 

  34. 

  35. #define atomic_xchg(v, new)		(xchg(&((v)->counter), new))
    36. 

  36. #define atomic_cmpxchg(v, o, n)		(cmpxchg(&((v)->counter), (o), (n)))
    37. 

  37. 

  38. #endif /* CONFIG_CPU_J2 */
    39. 

  39. 

  40. #endif /* __ASM_SH_ATOMIC_H */
    41.