diff options
| author |   Magnus Damm <damm@igel.co.jp> | 2008-07-16 19:02:54 +0900 |
|---|---|---|
| committer |   Paul Mundt <lethal@linux-sh.org> | 2008-07-28 18:10:35 +0900 |
| commit | 1eca5c92729a83f64826d15a9ecb1652dda54bcb (patch) | |
| tree | 95753726159c945deccef68d4b54de9f4d5ec756 /arch/sh/mm | |
| parent | sh: Export sh7366 VPU, VEU(1), VEU(2) using uio_pdrv_genirq (diff) | |
| download | linux-dev-1eca5c92729a83f64826d15a9ecb1652dda54bcb.tar.xz linux-dev-1eca5c92729a83f64826d15a9ecb1652dda54bcb.zip | |
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.c | 30 |
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 @@ * 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; +} |