1848b8605Smrg/************************************************************************** 2848b8605Smrg * 3848b8605Smrg * Copyright (C) 1999 Wittawat Yamwong 4848b8605Smrg * 5848b8605Smrg * Permission is hereby granted, free of charge, to any person obtaining a 6848b8605Smrg * copy of this software and associated documentation files (the "Software"), 7848b8605Smrg * to deal in the Software without restriction, including without limitation 8848b8605Smrg * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9848b8605Smrg * and/or sell copies of the Software, and to permit persons to whom the 10848b8605Smrg * Software is furnished to do so, subject to the following conditions: 11848b8605Smrg * 12848b8605Smrg * The above copyright notice and this permission notice shall be included 13848b8605Smrg * in all copies or substantial portions of the Software. 14848b8605Smrg * 15848b8605Smrg * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 16848b8605Smrg * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17848b8605Smrg * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18848b8605Smrg * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 19848b8605Smrg * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 20848b8605Smrg * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 21848b8605Smrg * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 22848b8605Smrg * 23848b8605Smrg **************************************************************************/ 24848b8605Smrg 25848b8605Smrg 26848b8605Smrg/** 27848b8605Smrg * @file 28848b8605Smrg * Memory manager code. Primarily used by device drivers to manage texture 29848b8605Smrg * heaps, etc. 30848b8605Smrg */ 31848b8605Smrg 32848b8605Smrg 33848b8605Smrg#ifndef _U_MM_H_ 34848b8605Smrg#define _U_MM_H_ 35848b8605Smrg 36848b8605Smrg 37848b8605Smrgstruct mem_block { 38848b8605Smrg struct mem_block *next, *prev; 39848b8605Smrg struct mem_block *next_free, *prev_free; 40848b8605Smrg struct mem_block *heap; 41848b8605Smrg int ofs,size; 42848b8605Smrg unsigned int free:1; 43848b8605Smrg unsigned int reserved:1; 44848b8605Smrg}; 45848b8605Smrg 46848b8605Smrg 47848b8605Smrg 48848b8605Smrg/** 49848b8605Smrg * input: total size in bytes 50848b8605Smrg * return: a heap pointer if OK, NULL if error 51848b8605Smrg */ 52848b8605Smrgextern struct mem_block *u_mmInit(int ofs, int size); 53848b8605Smrg 54848b8605Smrg/** 55848b8605Smrg * Allocate 'size' bytes with 2^align2 bytes alignment, 56848b8605Smrg * restrict the search to free memory after 'startSearch' 57848b8605Smrg * depth and back buffers should be in different 4mb banks 58848b8605Smrg * to get better page hits if possible 59848b8605Smrg * input: size = size of block 60848b8605Smrg * align2 = 2^align2 bytes alignment 61848b8605Smrg * startSearch = linear offset from start of heap to begin search 62848b8605Smrg * return: pointer to the allocated block, 0 if error 63848b8605Smrg */ 64848b8605Smrgextern struct mem_block *u_mmAllocMem(struct mem_block *heap, int size, int align2, 65848b8605Smrg int startSearch); 66848b8605Smrg 67848b8605Smrg/** 68848b8605Smrg * Free block starts at offset 69848b8605Smrg * input: pointer to a block 70848b8605Smrg * return: 0 if OK, -1 if error 71848b8605Smrg */ 72848b8605Smrgextern int u_mmFreeMem(struct mem_block *b); 73848b8605Smrg 74848b8605Smrg/** 75848b8605Smrg * Free block starts at offset 76848b8605Smrg * input: pointer to a heap, start offset 77848b8605Smrg * return: pointer to a block 78848b8605Smrg */ 79848b8605Smrgextern struct mem_block *u_mmFindBlock(struct mem_block *heap, int start); 80848b8605Smrg 81848b8605Smrg/** 82848b8605Smrg * destroy MM 83848b8605Smrg */ 84848b8605Smrgextern void u_mmDestroy(struct mem_block *mmInit); 85848b8605Smrg 86848b8605Smrg/** 87848b8605Smrg * For debugging purposes. 88848b8605Smrg */ 89848b8605Smrgextern void u_mmDumpMemInfo(const struct mem_block *mmInit); 90848b8605Smrg 91848b8605Smrg#endif 92