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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. #include <mm/tlb.h>
  30. #include <arch/mm/asid.h>
  31. #include <arch/asm.h>
  32. #include <arch/types.h>
  33.  
  34. /** Invalidate all entries in TLB. */
  35. void tlb_invalidate_all(void)
  36. {
  37.     write_cr3(read_cr3());
  38. }
  39.  
  40. /** Invalidate all entries in TLB that belong to specified address space.
  41.  *
  42.  * @param asid This parameter is ignored as the architecture doesn't support it.
  43.  */
  44. void tlb_invalidate_asid(asid_t asid)
  45. {
  46.     tlb_invalidate_all();
  47. }
  48.  
  49. /** Invalidate TLB entry for specified page range belonging to specified address space.
  50.  *
  51.  * @param asid This parameter is ignored as the architecture doesn't support it.
  52.  * @param page Address of the first page whose entry is to be invalidated.
  53.  * @param cnt Number of entries to invalidate.
  54.  */
  55. void tlb_invalidate_pages(asid_t asid, __address page, count_t cnt)
  56. {
  57.     int i;
  58.  
  59.     for (i = 0; i < cnt; i++)
  60.         invlpg(page + i * PAGE_SIZE);
  61. }
  62.