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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. #ifdef CONFIG_PAGE_HT
  34.  
  35. #ifndef __PAGE_HT_H__
  36. #define __PAGE_HT_H__
  37.  
  38. #include <mm/page.h>
  39. #include <typedefs.h>
  40. #include <arch/types.h>
  41. #include <adt/list.h>
  42. #include <adt/hash_table.h>
  43.  
  44. #define PAGE_HT_KEYS    2
  45. #define KEY_AS      0
  46. #define KEY_PAGE    1
  47.  
  48. #define PAGE_HT_ENTRIES_BITS    13
  49. #define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)
  50.  
  51. #define PTE_VALID(pte)      ((pte) != NULL)
  52. #define PTE_PRESENT(pte)    ((pte)->p != 0)
  53. #define PTE_GET_FRAME(pte)  ((pte)->frame)
  54.  
  55. #define SET_PTL0_ADDRESS(x)
  56.  
  57. struct pte {
  58.     link_t link;        /**< Page hash table link. */
  59.     as_t *as;       /**< Address space. */
  60.     __address page;     /**< Virtual memory page. */
  61.     __address frame;    /**< Physical memory frame. */
  62.     unsigned g : 1;     /**< Global page. */
  63.     unsigned x : 1;     /**< Execute. */
  64.     unsigned w : 1;     /**< Writable. */
  65.     unsigned k : 1;     /**< Kernel privileges required. */
  66.     unsigned c : 1;     /**< Cacheable. */
  67.     unsigned a : 1;     /**< Accessed. */
  68.     unsigned d : 1;     /**< Dirty. */
  69.     unsigned p : 1;     /**< Present. */
  70. };
  71.  
  72. extern page_mapping_operations_t ht_mapping_operations;
  73. extern mutex_t page_ht_lock;
  74. extern hash_table_t page_ht;
  75. extern hash_table_operations_t ht_operations;
  76.  
  77. #endif
  78.  
  79. #endif
  80.