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C/C++ Source or Header  |  2005-10-13  |  1KB  |  52 lines
  1. #ifndef __LINUX_CACHE_H
  2. #define __LINUX_CACHE_H
  3.  
  4. #include <linux/kernel.h>
  5. #include <linux/config.h>
  6. #include <asm/cache.h>
  7.  
  8. #ifndef L1_CACHE_ALIGN
  9. #define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES)
  10. #endif
  11.  
  12. #ifndef SMP_CACHE_BYTES
  13. #define SMP_CACHE_BYTES L1_CACHE_BYTES
  14. #endif
  15.  
  16. #ifndef ____cacheline_aligned
  17. #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
  18. #endif
  19.  
  20. #ifndef ____cacheline_aligned_in_smp
  21. #ifdef CONFIG_SMP
  22. #define ____cacheline_aligned_in_smp ____cacheline_aligned
  23. #else
  24. #define ____cacheline_aligned_in_smp
  25. #endif /* CONFIG_SMP */
  26. #endif
  27.  
  28. #ifndef __cacheline_aligned
  29. #define __cacheline_aligned                    \
  30.   __attribute__((__aligned__(SMP_CACHE_BYTES),            \
  31.          __section__(".data.cacheline_aligned")))
  32. #endif /* __cacheline_aligned */
  33.  
  34. #ifndef __cacheline_aligned_in_smp
  35. #ifdef CONFIG_SMP
  36. #define __cacheline_aligned_in_smp __cacheline_aligned
  37. #else
  38. #define __cacheline_aligned_in_smp
  39. #endif /* CONFIG_SMP */
  40. #endif
  41.  
  42. #if !defined(____cacheline_maxaligned_in_smp)
  43. #if defined(CONFIG_SMP)
  44. #define ____cacheline_maxaligned_in_smp \
  45.     __attribute__((__aligned__(1 << (L1_CACHE_SHIFT_MAX))))
  46. #else
  47. #define ____cacheline_maxaligned_in_smp
  48. #endif
  49. #endif
  50.  
  51. #endif /* __LINUX_CACHE_H */
  52.