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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * Copyright (C) 2005 Sergey Bondari
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30.  /** @addtogroup genericmm
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #ifndef __FRAME_H__
  37. #define __FRAME_H__
  38.  
  39. #include <arch/types.h>
  40. #include <typedefs.h>
  41. #include <adt/list.h>
  42. #include <synch/spinlock.h>
  43. #include <mm/buddy.h>
  44. #include <arch/mm/page.h>
  45. #include <arch/mm/frame.h>
  46.  
  47. #define ONE_FRAME   0
  48. #define TWO_FRAMES  1
  49.  
  50. #ifdef ARCH_STACK_FRAMES
  51. #define STACK_FRAMES ARCH_STACK_FRAMES
  52. #else
  53. #define STACK_FRAMES ONE_FRAME
  54. #endif
  55.  
  56. #define ZONES_MAX       16      /**< Maximum number of zones in system */
  57.  
  58. #define ZONE_JOIN       0x1 /**< If possible, merge with neighbouring zones */
  59.  
  60. #define FRAME_KA        0x1 /* skip frames conflicting with user address space */
  61. #define FRAME_PANIC     0x2 /* panic on failure */
  62. #define FRAME_ATOMIC            0x4 /* do not panic and do not sleep on failure */
  63. #define FRAME_NO_RECLAIM        0x8     /* do not start reclaiming when no free memory */
  64.  
  65. #define FRAME_OK        0   /* frame_alloc return status */
  66. #define FRAME_NO_MEMORY     1   /* frame_alloc return status */
  67. #define FRAME_ERROR     2   /* frame_alloc return status */
  68.  
  69. static inline __address PFN2ADDR(pfn_t frame)
  70. {
  71.     return (__address)(frame << FRAME_WIDTH);
  72. }
  73.  
  74. static inline pfn_t ADDR2PFN(__address addr)
  75. {
  76.     return (pfn_t)(addr >> FRAME_WIDTH);
  77. }
  78.  
  79. static inline count_t SIZE2FRAMES(size_t size)
  80. {
  81.     if (!size)
  82.         return 0;
  83.     return (count_t)((size-1) >> FRAME_WIDTH)+1;
  84. }
  85.  
  86. #define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
  87. #define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  88. #define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  89. #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  90. #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  91.  
  92. #define frame_alloc(order, flags)               frame_alloc_generic(order, flags, NULL, NULL)
  93. #define frame_alloc_rc(order, flags, status)            frame_alloc_generic(order, flags, status, NULL)
  94. #define frame_alloc_rc_zone(order, flags, status, zone)     frame_alloc_generic(order, flags, status, zone)
  95.  
  96. extern void frame_init(void);
  97. extern void * frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);
  98. extern void frame_free(__address frame);
  99. extern void frame_reference_add(pfn_t pfn);
  100.  
  101. extern int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);
  102. void * frame_get_parent(pfn_t frame, int hint);
  103. void frame_set_parent(pfn_t frame, void *data, int hint);
  104. void frame_mark_unavailable(pfn_t start, count_t count);
  105. __address zone_conf_size(count_t count);
  106. void zone_merge(int z1, int z2);
  107. void zone_merge_all(void);
  108.  
  109. /*
  110.  * Console functions
  111.  */
  112. extern void zone_print_list(void);
  113. void zone_print_one(int znum);
  114.  
  115. #endif
  116.  
  117.  /** @}
  118.  */
  119.  
  120.