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