+++ /dev/null
-/*
- * GLX Hardware Device Driver common code
- * Copyright (C) 1999 Wittawat Yamwong
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
- * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "mm.h"
-
-
-void
-mmDumpMemInfo(const struct mem_block *heap)
-{
- fprintf(stderr, "Memory heap %p:\n", (void *)heap);
- if (heap == 0) {
- fprintf(stderr, " heap == 0\n");
- } else {
- const struct mem_block *p;
-
- for(p = heap->next; p != heap; p = p->next) {
- fprintf(stderr, " Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size,
- p->free ? 'F':'.',
- p->reserved ? 'R':'.');
- }
-
- fprintf(stderr, "\nFree list:\n");
-
- for(p = heap->next_free; p != heap; p = p->next_free) {
- fprintf(stderr, " FREE Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size,
- p->free ? 'F':'.',
- p->reserved ? 'R':'.');
- }
-
- }
- fprintf(stderr, "End of memory blocks\n");
-}
-
-struct mem_block *
-mmInit(unsigned ofs, unsigned size)
-{
- struct mem_block *heap, *block;
-
- if (!size)
- return NULL;
-
- heap = calloc(1, sizeof(struct mem_block));
- if (!heap)
- return NULL;
-
- block = calloc(1, sizeof(struct mem_block));
- if (!block) {
- free(heap);
- return NULL;
- }
-
- heap->next = block;
- heap->prev = block;
- heap->next_free = block;
- heap->prev_free = block;
-
- block->heap = heap;
- block->next = heap;
- block->prev = heap;
- block->next_free = heap;
- block->prev_free = heap;
-
- block->ofs = ofs;
- block->size = size;
- block->free = 1;
-
- return heap;
-}
-
-
-static struct mem_block *
-SliceBlock(struct mem_block *p,
- unsigned startofs, unsigned size,
- unsigned reserved, unsigned alignment)
-{
- struct mem_block *newblock;
-
- /* break left [p, newblock, p->next], then p = newblock */
- if (startofs > p->ofs) {
- newblock = calloc(1, sizeof(struct mem_block));
- if (!newblock)
- return NULL;
- newblock->ofs = startofs;
- newblock->size = p->size - (startofs - p->ofs);
- newblock->free = 1;
- newblock->heap = p->heap;
-
- newblock->next = p->next;
- newblock->prev = p;
- p->next->prev = newblock;
- p->next = newblock;
-
- newblock->next_free = p->next_free;
- newblock->prev_free = p;
- p->next_free->prev_free = newblock;
- p->next_free = newblock;
-
- p->size -= newblock->size;
- p = newblock;
- }
-
- /* break right, also [p, newblock, p->next] */
- if (size < p->size) {
- newblock = calloc(1, sizeof(struct mem_block));
- if (!newblock)
- return NULL;
- newblock->ofs = startofs + size;
- newblock->size = p->size - size;
- newblock->free = 1;
- newblock->heap = p->heap;
-
- newblock->next = p->next;
- newblock->prev = p;
- p->next->prev = newblock;
- p->next = newblock;
-
- newblock->next_free = p->next_free;
- newblock->prev_free = p;
- p->next_free->prev_free = newblock;
- p->next_free = newblock;
-
- p->size = size;
- }
-
- /* p = middle block */
- p->free = 0;
-
- /* Remove p from the free list:
- */
- p->next_free->prev_free = p->prev_free;
- p->prev_free->next_free = p->next_free;
-
- p->next_free = 0;
- p->prev_free = 0;
-
- p->reserved = reserved;
- return p;
-}
-
-
-struct mem_block *
-mmAllocMem(struct mem_block *heap, unsigned size, unsigned align2, unsigned startSearch)
-{
- struct mem_block *p;
- const unsigned mask = (1 << align2)-1;
- unsigned startofs = 0;
- unsigned endofs;
-
- if (!heap || !size)
- return NULL;
-
- for (p = heap->next_free; p != heap; p = p->next_free) {
- assert(p->free);
-
- startofs = (p->ofs + mask) & ~mask;
- if ( startofs < startSearch ) {
- startofs = startSearch;
- }
- endofs = startofs+size;
- if (endofs <= (p->ofs+p->size))
- break;
- }
-
- if (p == heap)
- return NULL;
-
- assert(p->free);
- p = SliceBlock(p,startofs,size,0,mask+1);
-
- return p;
-}
-
-
-struct mem_block *
-mmFindBlock(struct mem_block *heap, unsigned start)
-{
- struct mem_block *p;
-
- for (p = heap->next; p != heap; p = p->next) {
- if (p->ofs == start)
- return p;
- }
-
- return NULL;
-}
-
-
-static inline int
-Join2Blocks(struct mem_block *p)
-{
- /* XXX there should be some assertions here */
-
- /* NOTE: heap->free == 0 */
-
- if (p->free && p->next->free) {
- struct mem_block *q = p->next;
-
- assert(p->ofs + p->size == q->ofs);
- p->size += q->size;
-
- p->next = q->next;
- q->next->prev = p;
-
- q->next_free->prev_free = q->prev_free;
- q->prev_free->next_free = q->next_free;
-
- free(q);
- return 1;
- }
- return 0;
-}
-
-int
-mmFreeMem(struct mem_block *b)
-{
- if (!b)
- return 0;
-
- if (b->free) {
- fprintf(stderr, "block already free\n");
- return -1;
- }
- if (b->reserved) {
- fprintf(stderr, "block is reserved\n");
- return -1;
- }
-
- b->free = 1;
- b->next_free = b->heap->next_free;
- b->prev_free = b->heap;
- b->next_free->prev_free = b;
- b->prev_free->next_free = b;
-
- Join2Blocks(b);
- if (b->prev != b->heap)
- Join2Blocks(b->prev);
-
- return 0;
-}
-
-
-void
-mmDestroy(struct mem_block *heap)
-{
- struct mem_block *p;
-
- if (!heap)
- return;
-
- for (p = heap->next; p != heap; ) {
- struct mem_block *next = p->next;
- free(p);
- p = next;
- }
-
- free(heap);
-}
+++ /dev/null
-/*
- * GLX Hardware Device Driver common code
- * Copyright (C) 1999 Wittawat Yamwong
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
- * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * Memory manager code. Primarily used by device drivers to manage texture
- * heaps, etc.
- */
-
-
-#ifndef MM_H
-#define MM_H
-
-
-struct mem_block {
- struct mem_block *next, *prev;
- struct mem_block *next_free, *prev_free;
- struct mem_block *heap;
- unsigned ofs;
- unsigned size;
- unsigned free:1;
- unsigned reserved:1;
-};
-
-
-
-/**
- * input: total size in bytes
- * return: a heap pointer if OK, NULL if error
- */
-extern struct mem_block *mmInit(unsigned ofs, unsigned size);
-
-/**
- * Allocate 'size' bytes with 2^align2 bytes alignment,
- * restrict the search to free memory after 'startSearch'
- * depth and back buffers should be in different 4mb banks
- * to get better page hits if possible
- * input: size = size of block
- * align2 = 2^align2 bytes alignment
- * startSearch = linear offset from start of heap to begin search
- * return: pointer to the allocated block, 0 if error
- */
-extern struct mem_block *mmAllocMem(struct mem_block *heap, unsigned size,
- unsigned align2, unsigned startSearch);
-
-/**
- * Free block starts at offset
- * input: pointer to a block
- * return: 0 if OK, -1 if error
- */
-extern int mmFreeMem(struct mem_block *b);
-
-/**
- * Free block starts at offset
- * input: pointer to a heap, start offset
- * return: pointer to a block
- */
-extern struct mem_block *mmFindBlock(struct mem_block *heap, unsigned start);
-
-/**
- * destroy MM
- */
-extern void mmDestroy(struct mem_block *mmInit);
-
-/**
- * For debuging purpose.
- */
-extern void mmDumpMemInfo(const struct mem_block *mmInit);
-
-#endif
projects / platform / upstream / mesa.git / commitdiff