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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 <mm/buddy.h>
  42. #include <arch/mm/page.h>
  43. #include <arch/mm/frame.h>
  44.  
  45. #define ONE_FRAME    0
  46. #define TWO_FRAMES   1
  47. #define FOUR_FRAMES  2
  48.  
  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. /** Maximum number of zones in the system. */
  57. #define ZONES_MAX  32
  58.  
  59. typedef uint8_t frame_flags_t;
  60.  
  61. /** Convert the frame address to kernel VA. */
  62. #define FRAME_KA          0x01
  63. /** Do not panic and do not sleep on failure. */
  64. #define FRAME_ATOMIC      0x02
  65. /** Do not start reclaiming when no free memory. */
  66. #define FRAME_NO_RECLAIM  0x04
  67.  
  68. typedef uint8_t zone_flags_t;
  69.  
  70. /** Zone is reserved (not available for allocation) */
  71. #define ZONE_RESERVED  0x08
  72. /** Zone is used by firmware (not available for allocation) */
  73. #define ZONE_FIRMWARE  0x10
  74.  
  75. /** Currently there is no equivalent zone flags
  76.     for frame flags */
  77. #define FRAME_TO_ZONE_FLAGS(frame_flags)  0
  78.  
  79. static inline uintptr_t PFN2ADDR(pfn_t frame)
  80. {
  81.     return (uintptr_t) (frame << FRAME_WIDTH);
  82. }
  83.  
  84. static inline pfn_t ADDR2PFN(uintptr_t addr)
  85. {
  86.     return (pfn_t) (addr >> FRAME_WIDTH);
  87. }
  88.  
  89. static inline count_t SIZE2FRAMES(size_t size)
  90. {
  91.     if (!size)
  92.         return 0;
  93.     return (count_t) ((size - 1) >> FRAME_WIDTH) + 1;
  94. }
  95.  
  96. static inline size_t FRAMES2SIZE(count_t frames)
  97. {
  98.     return (size_t) (frames << FRAME_WIDTH);
  99. }
  100.  
  101. #define IS_BUDDY_ORDER_OK(index, order) \
  102.     ((~(((unative_t) -1) << (order)) & (index)) == 0)
  103. #define IS_BUDDY_LEFT_BLOCK(zone, frame) \
  104.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 0)
  105. #define IS_BUDDY_RIGHT_BLOCK(zone, frame) \
  106.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1)
  107. #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) \
  108.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 0)
  109. #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) \
  110.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1)
  111.  
  112. #define frame_alloc(order, flags) \
  113.     frame_alloc_generic(order, flags, NULL)
  114.  
  115. extern void frame_init(void);
  116. extern void *frame_alloc_generic(uint8_t, frame_flags_t, count_t *);
  117. extern void frame_free(uintptr_t);
  118. extern void frame_reference_add(pfn_t);
  119.  
  120. extern count_t zone_create(pfn_t, count_t, pfn_t, zone_flags_t);
  121. extern void *frame_get_parent(pfn_t, count_t);
  122. extern void frame_set_parent(pfn_t, void *, count_t);
  123. extern void frame_mark_unavailable(pfn_t, count_t);
  124. extern uintptr_t zone_conf_size(count_t);
  125. extern bool zone_merge(count_t, count_t);
  126. extern void zone_merge_all(void);
  127. extern uint64_t zone_total_size(void);
  128.  
  129. /*
  130.  * Console functions
  131.  */
  132. extern void zone_print_list(void);
  133. extern void zone_print_one(count_t);
  134.  
  135. #endif
  136.  
  137. /** @}
  138.  */
  139.