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  1. /*
  2.  * Copyright (c) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup ia64   
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_ia64_BARRIER_H_
  36. #define KERN_ia64_BARRIER_H_
  37.  
  38. /*
  39.  * TODO: Implement true IA-64 memory barriers for macros below.
  40.  */
  41. #define CS_ENTER_BARRIER()  memory_barrier()
  42. #define CS_LEAVE_BARRIER()  memory_barrier()
  43.  
  44. #define memory_barrier()    asm volatile ("mf\n" ::: "memory")
  45. #define read_barrier()      memory_barrier()
  46. #define write_barrier()     memory_barrier()
  47.  
  48. #define srlz_i()        \
  49.     asm volatile (";; srlz.i ;;\n" ::: "memory")
  50. #define srlz_d()        \
  51.     asm volatile (";; srlz.d\n" ::: "memory")
  52.  
  53. #define fc_i(a)         \
  54.     asm volatile ("fc.i %0\n" :: "r" ((a)) : "memory")  
  55. #define sync_i()        \
  56.     asm volatile (";; sync.i\n" ::: "memory")
  57.  
  58. #define smc_coherence(a)    \
  59. {               \
  60.     fc_i((a));      \
  61.     sync_i();       \
  62.     srlz_i();       \
  63. }
  64.  
  65. #define FC_INVAL_MIN        32
  66. #define smc_coherence_block(a, l)       \
  67. {                       \
  68.     unsigned long i;            \
  69.     for (i = 0; i < (l); i += FC_INVAL_MIN) \
  70.         fc_i((void *)(a) + i);      \
  71.     sync_i();               \
  72.     srlz_i();               \
  73. }
  74.  
  75. #endif
  76.  
  77. /** @}
  78.  */
  79.