via_ds.h

来自「linux-2.4.29操作系统的源码」· C头文件 代码 · 共 135 行

/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
 *
 * 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, sub license,
 * 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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.
 */

#ifndef _via_ds_h_
#define _via_ds_h_

/* Set Data Structure */

#define SET_SIZE 5000

typedef struct {
	unsigned int val;
	int alloc_next, free_next;
} list_item_t;

typedef struct {
	int alloc;
	int free;
	int trace;
	list_item_t list[SET_SIZE];
} set_t;

set_t *via_set_init(void);
int via_set_add(set_t *set, unsigned int item);
int via_set_del(set_t *set, unsigned int item);
int via_set_first(set_t *set, unsigned int *item);
int via_set_next(set_t *set, unsigned int *item);
int via_set_destroy(set_t *set);

#endif


#ifndef MM_INC
#define MM_INC

struct mem_block_t {
	struct mem_block_t *next;
	struct mem_block_t *heap;
	int ofs,size;
	int align;
	int free:1;
	int reserved:1;
};
typedef struct mem_block_t TMemBlock;
typedef struct mem_block_t *PMemBlock;

/* a heap is just the first block in a chain */
typedef struct mem_block_t memHeap_t;

static __inline__ int mmBlockSize(PMemBlock b)
{
	return b->size;
}

static __inline__ int mmOffset(PMemBlock b)
{
	return b->ofs;
}

static __inline__ void mmMarkReserved(PMemBlock b)
{
	b->reserved = 1;
}

/* 
 * input: total size in bytes
 * return: a heap pointer if OK, NULL if error
 */

memHeap_t *via_mmInit(int ofs, int size);

memHeap_t *via_mmAddRange(memHeap_t *heap, int ofs, int 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
 */

PMemBlock  via_mmAllocMem(memHeap_t *heap, int size, int align2, int startSearch);

/*
 * Free block starts at offset
 * input: pointer to a block
 * return: 0 if OK, -1 if error
 */
int  via_mmFreeMem(PMemBlock b);

/*
 * Reserve 'size' bytes block start at offset
 * This is used to prevent allocation of memory already used
 * by the X server for the front buffer, pixmaps, and cursor
 * input: size, offset
 * output: 0 if OK, -1 if error
 */
int via_mmReserveMem(memHeap_t *heap, int offset,int size);
int via_mmFreeReserved(memHeap_t *heap, int offset);

/*
 * destroy MM
 */
void via_mmDestroy(memHeap_t *mmInit);

/* For debuging purpose. */
void via_mmDumpMemInfo(memHeap_t *mmInit);

#endif