mirror of
https://github.com/torvalds/linux.git
synced 2024-10-31 01:01:52 +00:00
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
|
/*
|
||
|
|
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/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) {
|
||
|
|
SetPageReserved(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) {
|
||
|
|
ClearPageReserved(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");
|