aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/mm/consistent.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/mm/consistent.c')
-rw-r--r--arch/sh/mm/consistent.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index d3c33fc5b1c..8277982d093 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -10,6 +10,7 @@
* for more details.
*/
#include <linux/mm.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/cacheflush.h>
#include <asm/addrspace.h>
@@ -185,3 +186,32 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
}
}
EXPORT_SYMBOL(dma_cache_sync);
+
+int platform_resource_setup_memory(struct platform_device *pdev,
+ char *name, unsigned long memsize)
+{
+ struct resource *r;
+ dma_addr_t dma_handle;
+ void *buf;
+
+ r = pdev->resource + pdev->num_resources - 1;
+ if (r->flags) {
+ pr_warning("%s: unable to find empty space for resource\n",
+ name);
+ return -EINVAL;
+ }
+
+ buf = dma_alloc_coherent(NULL, memsize, &dma_handle, GFP_KERNEL);
+ if (!buf) {
+ pr_warning("%s: unable to allocate memory\n", name);
+ return -ENOMEM;
+ }
+
+ memset(buf, 0, memsize);
+
+ r->flags = IORESOURCE_MEM;
+ r->start = dma_handle;
+ r->end = r->start + memsize - 1;
+ r->name = name;
+ return 0;
+}