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path: root/drivers/media/video/zr36120_mem.c
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Diffstat (limited to 'drivers/media/video/zr36120_mem.c')
-rw-r--r--drivers/media/video/zr36120_mem.c79
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 000000000000..c87113d6cc60
--- /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");