diff options
Diffstat (limited to 'arch/sh/mm/consistent.c')
| -rw-r--r-- | arch/sh/mm/consistent.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index b2ce014401b..64b8f7f96f9 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -95,8 +95,31 @@ 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) +static int __init memchunk_setup(char *str) +{ + return 1; /* accept anything that begins with "memchunk." */ +} +__setup("memchunk.", memchunk_setup); + +static void __init memchunk_cmdline_override(char *name, unsigned long *sizep) +{ + char *p = boot_command_line; + int k = strlen(name); + + while ((p = strstr(p, "memchunk."))) { + p += 9; /* strlen("memchunk.") */ + if (!strncmp(name, p, k) && p[k] == '=') { + p += k + 1; + *sizep = memparse(p, NULL); + pr_info("%s: forcing memory chunk size to 0x%08lx\n", + name, *sizep); + break; + } + } +} + +int __init platform_resource_setup_memory(struct platform_device *pdev, + char *name, unsigned long memsize) { struct resource *r; dma_addr_t dma_handle; @@ -109,6 +132,10 @@ int platform_resource_setup_memory(struct platform_device *pdev, return -EINVAL; } + memchunk_cmdline_override(name, &memsize); + if (!memsize) + return 0; + buf = dma_alloc_coherent(NULL, memsize, &dma_handle, GFP_KERNEL); if (!buf) { pr_warning("%s: unable to allocate memory\n", name); |