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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 <synch/spinlock.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. #define FOUR_FRAMES  2
  49.  
  50.  
  51. #ifdef ARCH_STACK_FRAMES
  52.     #define STACK_FRAMES  ARCH_STACK_FRAMES
  53. #else
  54.     #define STACK_FRAMES  ONE_FRAME
  55. #endif
  56.  
  57. /** Maximum number of zones in the system. */
  58. #define ZONES_MAX  32
  59.  
  60. typedef uint8_t frame_flags_t;
  61.  
  62. /** Convert the frame address to kernel VA. */
  63. #define FRAME_KA          0x01
  64. /** Do not panic and do not sleep on failure. */
  65. #define FRAME_ATOMIC      0x02
  66. /** Do not start reclaiming when no free memory. */
  67. #define FRAME_NO_RECLAIM  0x04
  68.  
  69. typedef uint8_t zone_flags_t;
  70.  
  71. /** Available zone (free for allocation) */
  72. #define ZONE_AVAILABLE  0x00
  73. /** Zone is reserved (not available for allocation) */
  74. #define ZONE_RESERVED   0x08
  75. /** Zone is used by firmware (not available for allocation) */
  76. #define ZONE_FIRMWARE   0x10
  77.  
  78. /** Currently there is no equivalent zone flags
  79.     for frame flags */
  80. #define FRAME_TO_ZONE_FLAGS(frame_flags)  0
  81.  
  82. typedef struct {
  83.     size_t refcount;     /**< Tracking of shared frames */
  84.     uint8_t buddy_order;  /**< Buddy system block order */
  85.     link_t buddy_link;    /**< Link to the next free block inside
  86.                                one order */
  87.     void *parent;         /**< If allocated by slab, this points there */
  88. } frame_t;
  89.  
  90. typedef struct {
  91.     pfn_t base;                    /**< Frame_no of the first frame
  92.                                         in the frames array */
  93.     size_t count;                 /**< Size of zone */
  94.     size_t free_count;            /**< Number of free frame_t
  95.                                         structures */
  96.     size_t busy_count;            /**< Number of busy frame_t
  97.                                         structures */
  98.     zone_flags_t flags;            /**< Type of the zone */
  99.    
  100.     frame_t *frames;               /**< Array of frame_t structures
  101.                                         in this zone */
  102.     buddy_system_t *buddy_system;  /**< Buddy system for the zone */
  103. } zone_t;
  104.  
  105. /*
  106.  * The zoneinfo.lock must be locked when accessing zoneinfo structure.
  107.  * Some of the attributes in zone_t structures are 'read-only'
  108.  */
  109. typedef struct {
  110.     SPINLOCK_DECLARE(lock);
  111.     size_t count;
  112.     zone_t info[ZONES_MAX];
  113. } zones_t;
  114.  
  115. extern zones_t zones;
  116.  
  117. static inline uintptr_t PFN2ADDR(pfn_t frame)
  118. {
  119.     return (uintptr_t) (frame << FRAME_WIDTH);
  120. }
  121.  
  122. static inline pfn_t ADDR2PFN(uintptr_t addr)
  123. {
  124.     return (pfn_t) (addr >> FRAME_WIDTH);
  125. }
  126.  
  127. static inline size_t SIZE2FRAMES(size_t size)
  128. {
  129.     if (!size)
  130.         return 0;
  131.     return (size_t) ((size - 1) >> FRAME_WIDTH) + 1;
  132. }
  133.  
  134. static inline size_t FRAMES2SIZE(size_t frames)
  135. {
  136.     return (size_t) (frames << FRAME_WIDTH);
  137. }
  138.  
  139. static inline bool zone_flags_available(zone_flags_t flags)
  140. {
  141.     return ((flags & (ZONE_RESERVED | ZONE_FIRMWARE)) == 0);
  142. }
  143.  
  144. #define IS_BUDDY_ORDER_OK(index, order) \
  145.     ((~(((unative_t) -1) << (order)) & (index)) == 0)
  146. #define IS_BUDDY_LEFT_BLOCK(zone, frame) \
  147.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 0)
  148. #define IS_BUDDY_RIGHT_BLOCK(zone, frame) \
  149.     (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1)
  150. #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) \
  151.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 0)
  152. #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) \
  153.     (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1)
  154.  
  155. #define frame_alloc(order, flags) \
  156.     frame_alloc_generic(order, flags, NULL)
  157.  
  158. extern void frame_init(void);
  159. extern void *frame_alloc_generic(uint8_t, frame_flags_t, size_t *);
  160. extern void frame_free(uintptr_t);
  161. extern void frame_reference_add(pfn_t);
  162.  
  163. extern size_t find_zone(pfn_t frame, size_t count, size_t hint);
  164. extern size_t zone_create(pfn_t, size_t, pfn_t, zone_flags_t);
  165. extern void *frame_get_parent(pfn_t, size_t);
  166. extern void frame_set_parent(pfn_t, void *, size_t);
  167. extern void frame_mark_unavailable(pfn_t, size_t);
  168. extern uintptr_t zone_conf_size(size_t);
  169. extern bool zone_merge(size_t, size_t);
  170. extern void zone_merge_all(void);
  171. extern uint64_t zone_total_size(void);
  172.  
  173. /*
  174.  * Console functions
  175.  */
  176. extern void zone_print_list(void);
  177. extern void zone_print_one(size_t);
  178.  
  179. #endif
  180.  
  181. /** @}
  182.  */
  183.