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Diffstat (limited to 'drivers/media/video/zr36120_mem.c')
-rw-r--r-- | drivers/media/video/zr36120_mem.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/media/video/zr36120_mem.c b/drivers/media/video/zr36120_mem.c new file mode 100644 index 0000000..c87113d --- /dev/null +++ b/drivers/media/video/zr36120_mem.c @@ -0,0 +1,79 @@ +/* + 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"); |