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authorChris Zankel <czankel@tensilica.com>2006-12-10 02:18:48 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:55:39 -0800
commit173d6681380aa1d60dfc35ed7178bd7811ba2784 (patch)
tree9d6d4d2c6dd791499ebab558647efb67ac88ae3a /arch/xtensa/kernel/pci-dma.c
parentfd43fe19b830d6cd0eba08a6c6a5f71a6bd9c1b0 (diff)
downloadlinux-173d6681380aa1d60dfc35ed7178bd7811ba2784.tar.bz2
[PATCH] xtensa: remove extra header files
The Xtensa port contained many header files that were never needed. This rather lengthy patch removes all those files. Unfortunately, there were many dependencies that needed to be updated, so this patch touches quite a few source files. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/xtensa/kernel/pci-dma.c')
-rw-r--r--arch/xtensa/kernel/pci-dma.c44
1 files changed, 32 insertions, 12 deletions
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c
index 6648fa9d9192..ca76f071666e 100644
--- a/arch/xtensa/kernel/pci-dma.c
+++ b/arch/xtensa/kernel/pci-dma.c
@@ -1,5 +1,5 @@
/*
- * arch/xtensa/kernel/pci-dma.c
+ * arch/xtensa/pci-dma.c
*
* DMA coherent memory allocation.
*
@@ -29,28 +29,48 @@
*/
void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
+dma_alloc_coherent(struct device *dev,size_t size,dma_addr_t *handle,gfp_t flag)
{
- void *ret;
+ unsigned long ret;
+ unsigned long uncached = 0;
/* ignore region speicifiers */
- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
- if (dev == NULL || (*dev->dma_mask < 0xffffffff))
- gfp |= GFP_DMA;
- ret = (void *)__get_free_pages(gfp, get_order(size));
+ flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
- if (ret != NULL) {
- memset(ret, 0, size);
- *handle = virt_to_bus(ret);
+ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+ flag |= GFP_DMA;
+ ret = (unsigned long)__get_free_pages(flag, get_order(size));
+
+ if (ret == 0)
+ return NULL;
+
+ /* We currently don't support coherent memory outside KSEG */
+
+ if (ret < XCHAL_KSEG_CACHED_VADDR
+ || ret >= XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_SIZE)
+ BUG();
+
+
+ if (ret != 0) {
+ memset((void*) ret, 0, size);
+ uncached = ret+XCHAL_KSEG_BYPASS_VADDR-XCHAL_KSEG_CACHED_VADDR;
+ *handle = virt_to_bus((void*)ret);
+ __flush_invalidate_dcache_range(ret, size);
}
- return (void*) BYPASS_ADDR((unsigned long)ret);
+
+ return (void*)uncached;
}
void dma_free_coherent(struct device *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
- free_pages(CACHED_ADDR((unsigned long)vaddr), get_order(size));
+ long addr=(long)vaddr+XCHAL_KSEG_CACHED_VADDR-XCHAL_KSEG_BYPASS_VADDR;
+
+ if (addr < 0 || addr >= XCHAL_KSEG_SIZE)
+ BUG();
+
+ free_pages(addr, get_order(size));
}