2 * GLX Hardware Device Driver common code
3 * Copyright (C) 1999 Wittawat Yamwong
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25 * Memory manager code. Primarily used by device drivers to manage texture
33 struct mem_block *next, *prev;
34 struct mem_block *next_free, *prev_free;
35 struct mem_block *heap;
38 unsigned int reserved:1;
41 /* Rename the variables in the drm copy of this code so that it doesn't
42 * conflict with mesa or whoever else has copied it around.
44 #define mmInit drm_mmInit
45 #define mmAllocMem drm_mmAllocMem
46 #define mmFreeMem drm_mmFreeMem
47 #define mmFindBlock drm_mmFindBlock
48 #define mmDestroy drm_mmDestroy
49 #define mmDumpMemInfo drm_mmDumpMemInfo
52 * input: total size in bytes
53 * return: a heap pointer if OK, NULL if error
55 extern struct mem_block *mmInit(int ofs, int size);
58 * Allocate 'size' bytes with 2^align2 bytes alignment,
59 * restrict the search to free memory after 'startSearch'
60 * depth and back buffers should be in different 4mb banks
61 * to get better page hits if possible
62 * input: size = size of block
63 * align2 = 2^align2 bytes alignment
64 * startSearch = linear offset from start of heap to begin search
65 * return: pointer to the allocated block, 0 if error
67 extern struct mem_block *mmAllocMem(struct mem_block *heap, int size,
68 int align2, int startSearch);
71 * Free block starts at offset
72 * input: pointer to a block
73 * return: 0 if OK, -1 if error
75 extern int mmFreeMem(struct mem_block *b);
78 * Free block starts at offset
79 * input: pointer to a heap, start offset
80 * return: pointer to a block
82 extern struct mem_block *mmFindBlock(struct mem_block *heap, int start);
87 extern void mmDestroy(struct mem_block *mmInit);
90 * For debuging purpose.
92 extern void mmDumpMemInfo(const struct mem_block *mmInit);