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Diffstat (limited to 'arch/nios2/mm/dma-mapping.c')
-rw-r--r--arch/nios2/mm/dma-mapping.c34
1 files changed, 15 insertions, 19 deletions
diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c
index 4af9e5b5ba1c..9cb238664584 100644
--- a/arch/nios2/mm/dma-mapping.c
+++ b/arch/nios2/mm/dma-mapping.c
@@ -60,32 +60,28 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
}
}
-void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
- gfp_t gfp, unsigned long attrs)
+void arch_dma_prep_coherent(struct page *page, size_t size)
{
- void *ret;
+ unsigned long start = (unsigned long)page_address(page);
- /* optimized page clearing */
- gfp |= __GFP_ZERO;
+ flush_dcache_range(start, start + size);
+}
- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
- gfp |= GFP_DMA;
+void *uncached_kernel_address(void *ptr)
+{
+ unsigned long addr = (unsigned long)ptr;
- ret = (void *) __get_free_pages(gfp, get_order(size));
- if (ret != NULL) {
- *dma_handle = virt_to_phys(ret);
- flush_dcache_range((unsigned long) ret,
- (unsigned long) ret + size);
- ret = UNCAC_ADDR(ret);
- }
+ addr |= CONFIG_NIOS2_IO_REGION_BASE;
- return ret;
+ return (void *)ptr;
}
-void arch_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
+void *cached_kernel_address(void *ptr)
{
- unsigned long addr = (unsigned long) CAC_ADDR((unsigned long) vaddr);
+ unsigned long addr = (unsigned long)ptr;
+
+ addr &= ~CONFIG_NIOS2_IO_REGION_BASE;
+ addr |= CONFIG_NIOS2_KERNEL_REGION_BASE;
- free_pages(addr, get_order(size));
+ return (void *)ptr;
}