zr36120_mem.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- zr36120_mem.c - Zoran 36120/36125 based framegrabbers
- Copyright (C) 1998-1999 Pauline Middelink <middelin@polyware.nl>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/config.h>
- #include <linux/mm.h>
- #include <linux/pci.h>
- #include <linux/wrapper.h>
- #include <linux/slab.h>
- #include <linux/module.h>
- #include <asm/io.h>
- #ifdef CONFIG_BIGPHYS_AREA
- #include <linux/bigphysarea.h>
- #endif
- #include "zr36120.h"
- #include "zr36120_mem.h"
- /*******************************/
- /* Memory management functions */
- /*******************************/
- void* bmalloc(unsigned long size)
- {
- void* mem;
- #ifdef CONFIG_BIGPHYS_AREA
- mem = bigphysarea_alloc_pages(size/PAGE_SIZE, 1, GFP_KERNEL);
- #else
- /*
- * The following function got a lot of memory at boottime,
- * so we know its always there...
- */
- mem = (void*)__get_free_pages(GFP_USER|GFP_DMA,get_order(size));
- #endif
- if (mem) {
- unsigned long adr = (unsigned long)mem;
- while (size > 0) {
- mem_map_reserve(virt_to_page(phys_to_virt(adr)));
- adr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
- }
- return mem;
- }
- void bfree(void* mem, unsigned long size)
- {
- if (mem) {
- unsigned long adr = (unsigned long)mem;
- unsigned long siz = size;
- while (siz > 0) {
- mem_map_unreserve(virt_to_page(phys_to_virt(adr)));
- adr += PAGE_SIZE;
- siz -= PAGE_SIZE;
- }
- #ifdef CONFIG_BIGPHYS_AREA
- bigphysarea_free_pages(mem);
- #else
- free_pages((unsigned long)mem,get_order(size));
- #endif
- }
- }
- MODULE_LICENSE("GPL");