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  1. /*
  2.  * Copyright (C) 2006 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. /*
  30.  * This is the generic page hash table interface.
  31.  */
  32.  
  33. #ifndef __PAGE_HT_H__
  34. #define __PAGE_HT_H__
  35.  
  36. #include <mm/page.h>
  37. #include <typedefs.h>
  38. #include <arch/types.h>
  39. #include <adt/list.h>
  40. #include <adt/hash_table.h>
  41.  
  42. #define PAGE_HT_KEYS    2
  43. #define KEY_AS      0
  44. #define KEY_PAGE    1
  45.  
  46. #define PAGE_HT_ENTRIES_BITS    13
  47. #define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)
  48.  
  49. struct pte {
  50.     link_t link;        /**< Page hash table link. */
  51.     as_t *as;       /**< Address space. */
  52.     __address page;     /**< Virtual memory page. */
  53.     __address frame;    /**< Physical memory frame. */
  54.     int flags;
  55.     unsigned a : 1;     /**< Accessed. */
  56.     unsigned d : 1;     /**< Dirty. */
  57.     unsigned p : 1;     /**< Present. */
  58. };
  59.  
  60. extern page_mapping_operations_t ht_mapping_operations;
  61. extern spinlock_t page_ht_lock;
  62. extern hash_table_t page_ht;
  63. extern hash_table_operations_t ht_operations;
  64.  
  65. #endif
  66.