payloads/libpayload/include/x86/arch/cache.h

   1 /*
   2  *
   3  * Copyright 2013 Google Inc.
   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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * cache.h: Cache maintenance API for x86
  29  */
  30
  31 #ifndef __ARCH_CACHE_H__
  32 #define __ARCH_CACHE_H__
  33
  34 #include <stddef.h>
  35 #include <stdint.h>
  36
  37 /* returns number of bytes per cache line */
  38 unsigned int dcache_line_bytes(void);
  39
  40 void dcache_invalidate_all(void);
  41 void dcache_clean_invalidate_all(void);
  42 void dcache_clean_all(void);
  43 void dcache_clean_by_mva(void const *addr, size_t len);
  44 void dcache_invalidate_by_mva(void const *addr, size_t len);
  45 void dcache_clean_invalidate_by_mva(void const *addr, size_t len);
  46 /* NOOPs mirroring ARM's cache API, since x86 devices usually cache snoop */
  47 #define dmb()
  48 #define dsb()
  49 #define cache_sync_instructions()
  50
  51 #endif