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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 KERN_FRAME_H_
  37. #define KERN_FRAME_H_
  38.  
  39. #include <arch/types.h>
  40. #include <adt/list.h>
  41. #include <synch/spinlock.h>
  42. #include <mm/buddy.h>
  43. #include <arch/mm/page.h>
  44. #include <arch/mm/frame.h>
  45.  
  46. #define ONE_FRAME   0
  47. #define TWO_FRAMES  1
  48.  
  49. #ifdef ARCH_STACK_FRAMES
  50. #define STACK_FRAMES ARCH_STACK_FRAMES
  51. #else
  52. #define STACK_FRAMES ONE_FRAME
  53. #endif
  54.  
  55. /** Maximum number of zones in system. */
  56. #define ZONES_MAX           16
  57.  
  58. /** If possible, merge with neighbouring zones. */
  59. #define ZONE_JOIN           0x1
  60.  
  61. /** Convert the frame address to kernel va. */
  62. #define FRAME_KA        0x1
  63. /** Do not panic and do not sleep on failure. */
  64. #define FRAME_ATOMIC            0x2
  65. /** Do not start reclaiming when no free memory. */
  66. #define FRAME_NO_RECLAIM        0x4
  67.  
  68. static inline uintptr_t PFN2ADDR(pfn_t frame)
  69. {
  70.     return (uintptr_t) (frame << FRAME_WIDTH);
  71. }
  72.  
  73. static inline pfn_t ADDR2PFN(uintptr_t addr)
  74. {
  75.     return (pfn_t) (addr >> FRAME_WIDTH);
  76. }
  77.  
  78. static inline count_t SIZE2FRAMES(size_t size)
  79. {
  80.     if (!size)
  81.         return 0;
  82.     return (count_t) ((size - 1) >> FRAME_WIDTH) + 1;
  83. }
  84.  
  85. #define IS_BUDDY_ORDER_OK(index, order)     \
  86.     ((~(((unative_t) -1) << (order)) & (index)) == 0)
  87. #define IS_BUDDY_LEFT_BLOCK(zone, frame)    \
  88.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  89. #define IS_BUDDY_RIGHT_BLOCK(zone, frame)   \
  90.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  91. #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    \
  92.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  93. #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   \
  94.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  95.  
  96. #define frame_alloc(order, flags)       \
  97.     frame_alloc_generic(order, flags, NULL)
  98.  
  99. extern void frame_init(void);
  100. extern void *frame_alloc_generic(uint8_t order, int flags, int *pzone);
  101. extern void frame_free(uintptr_t frame);
  102. extern void frame_reference_add(pfn_t pfn);
  103.  
  104. extern int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);
  105. void *frame_get_parent(pfn_t frame, int hint);
  106. void frame_set_parent(pfn_t frame, void *data, int hint);
  107. void frame_mark_unavailable(pfn_t start, count_t count);
  108. uintptr_t zone_conf_size(count_t count);
  109. void zone_merge(int z1, int z2);
  110. void zone_merge_all(void);
  111.  
  112. /*
  113.  * Console functions
  114.  */
  115. extern void zone_print_list(void);
  116. void zone_print_one(int znum);
  117.  
  118. #endif
  119.  
  120. /** @}
  121.  */
  122.