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authorMagnus Damm <damm@igel.co.jp>2008-07-16 06:02:54 -0400
committerPaul Mundt <lethal@linux-sh.org>2008-07-28 05:10:35 -0400
commit1eca5c92729a83f64826d15a9ecb1652dda54bcb (patch)
tree95753726159c945deccef68d4b54de9f4d5ec756 /arch/sh/mm
parent714750dd5c6aef8e204d35ba28c1be9641418671 (diff)
sh: Add memory chunks to SH-Mobile UIO devices
This patch adds physically contiguous memory chunks to the UIO devices. The same strategy can be used in the future for the CEU as well. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-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 d3c33fc5b1c2..8277982d0938 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -10,6 +10,7 @@
10 * for more details. 10 * for more details.
11 */ 11 */
12#include <linux/mm.h> 12#include <linux/mm.h>
13#include <linux/platform_device.h>
13#include <linux/dma-mapping.h> 14#include <linux/dma-mapping.h>
14#include <asm/cacheflush.h> 15#include <asm/cacheflush.h>
15#include <asm/addrspace.h> 16#include <asm/addrspace.h>
@@ -185,3 +186,32 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
185 } 186 }
186} 187}
187EXPORT_SYMBOL(dma_cache_sync); 188EXPORT_SYMBOL(dma_cache_sync);
189
190int platform_resource_setup_memory(struct platform_device *pdev,
191 char *name, unsigned long memsize)
192{
193 struct resource *r;
194 dma_addr_t dma_handle;
195 void *buf;
196
197 r = pdev->resource + pdev->num_resources - 1;
198 if (r->flags) {
199 pr_warning("%s: unable to find empty space for resource\n",
200 name);
201 return -EINVAL;
202 }
203
204 buf = dma_alloc_coherent(NULL, memsize, &dma_handle, GFP_KERNEL);
205 if (!buf) {
206 pr_warning("%s: unable to allocate memory\n", name);
207 return -ENOMEM;
208 }
209
210 memset(buf, 0, memsize);
211
212 r->flags = IORESOURCE_MEM;
213 r->start = dma_handle;
214 r->end = r->start + memsize - 1;
215 r->name = name;
216 return 0;
217}