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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. #ifndef __FRAME_H__
  31. #define __FRAME_H__
  32.  
  33. #include <arch/types.h>
  34. #include <typedefs.h>
  35. #include <adt/list.h>
  36. #include <synch/spinlock.h>
  37. #include <mm/buddy.h>
  38. #include <arch/mm/page.h>
  39.  
  40. #define ONE_FRAME   0
  41.  
  42. #define ZONES_MAX       16      /**< Maximum number of zones in system */
  43.  
  44. #define ZONE_JOIN       0x1 /**< If possible, merge with neighberhood zones */
  45.  
  46. #define FRAME_KA        0x1 /* skip frames conflicting with user address space */
  47. #define FRAME_PANIC     0x2 /* panic on failure */
  48. #define FRAME_ATOMIC            0x4 /* do not panic and do not sleep on failure */
  49. #define FRAME_NO_RECLAIM        0x8     /* do not start reclaiming when no free memory */
  50.  
  51. #define FRAME_OK        0   /* frame_alloc return status */
  52. #define FRAME_NO_MEMORY     1   /* frame_alloc return status */
  53. #define FRAME_ERROR     2   /* frame_alloc return status */
  54.  
  55. /* Return true if the interlvals overlap */
  56. static inline int overlaps(__address s1,__address e1, __address s2, __address e2)
  57. {
  58.     if (s1 >= s2 && s1 < e2)
  59.         return 1;
  60.     if (e1 >= s2 && e1 < e2)
  61.         return 1;
  62.     if ((s1 < s2) && (e1 >= e2))
  63.         return 1;
  64.     return 0;
  65. }
  66.  
  67. static inline __address PFN2ADDR(pfn_t frame)
  68. {
  69.     return (__address)(frame << FRAME_WIDTH);
  70. }
  71.  
  72. static inline pfn_t ADDR2PFN(__address addr)
  73. {
  74.     return (pfn_t)(addr >> FRAME_WIDTH);
  75. }
  76.  
  77. static inline count_t SIZE2FRAMES(size_t size)
  78. {
  79.     if (!size)
  80.         return 0;
  81.     return (count_t)((size-1) >> FRAME_WIDTH)+1;
  82. }
  83.  
  84. #define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
  85. #define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  86. #define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  87. #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
  88. #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
  89.  
  90. #define frame_alloc(order, flags)               frame_alloc_generic(order, flags, NULL, NULL)
  91. #define frame_alloc_rc(order, flags, status)            frame_alloc_generic(order, flags, status, NULL)
  92. #define frame_alloc_rc_zone(order, flags, status, zone)     frame_alloc_generic(order, flags, status, zone)
  93.  
  94. extern void frame_init(void);
  95. __address frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);
  96. extern void frame_free(__address addr);
  97.  
  98. extern void zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);
  99.  
  100. void * frame_get_parent(pfn_t frame, int hint);
  101. void frame_set_parent(pfn_t frame, void *data, int hint);
  102. void frame_mark_unavailable(pfn_t start, count_t count);
  103. __address zone_conf_size(pfn_t start, count_t count);
  104.  
  105. /*
  106.  * Console functions
  107.  */
  108. extern void zone_print_list(void);
  109. void zone_print_one(int znum);
  110.  
  111. #endif
  112.