kitten/include/lwk/cache.h

   1 #ifndef _LWK_CACHE_H
   2 #define _LWK_CACHE_H
   3
   4 #include <lwk/kernel.h>
   5 #include <arch/cache.h>
   6
   7 #ifndef L1_CACHE_ALIGN
   8 #define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES)
   9 #endif
  10
  11 #ifndef SMP_CACHE_BYTES
  12 #define SMP_CACHE_BYTES L1_CACHE_BYTES
  13 #endif
  14
  15 #ifndef __read_mostly
  16 #define __read_mostly
  17 #endif
  18
  19 #ifndef ____cacheline_aligned
  20 #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
  21 #endif
  22
  23 #ifndef ____cacheline_aligned_in_smp
  24 #define ____cacheline_aligned_in_smp ____cacheline_aligned
  25 #endif
  26
  27 #ifndef __cacheline_aligned
  28 #define __cacheline_aligned                                     \
  29   __attribute__((__aligned__(SMP_CACHE_BYTES),                  \
  30                  __section__(".data.cacheline_aligned")))
  31 #endif
  32
  33 #ifndef __cacheline_aligned_in_smp
  34 #define __cacheline_aligned_in_smp __cacheline_aligned
  35 #endif
  36
  37 /*
  38  * The maximum alignment needed for some critical structures
  39  * These could be inter-node cacheline sizes/L3 cacheline
  40  * size etc.  Define this in asm/cache.h for your arch
  41  */
  42 #ifndef INTERNODE_CACHE_SHIFT
  43 #define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT
  44 #endif
  45
  46 #if !defined(____cacheline_internodealigned_in_smp)
  47 #define ____cacheline_internodealigned_in_smp \
  48         __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT))))
  49 #endif
  50
  51 #endif /* _LWK_CACHE_H */