1 files changed, 193 insertions, 0 deletions
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
new file mode 100644
index 000000000000..627315ecdb52
--- /dev/null
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -0,0 +1,193 @@
+#ifndef __ASM_SH_DMA_MAPPING_H
+#define __ASM_SH_DMA_MAPPING_H
+
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+#include <asm-generic/dma-coherent.h>
+
+extern struct bus_type pci_bus_type;
+
+#define dma_supported(dev, mask)	(1)
+
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+	if (!dev->dma_mask || !dma_supported(dev, mask))
+		return -EIO;
+
+	*dev->dma_mask = mask;
+
+	return 0;
+}
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			 dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+		       void *vaddr, dma_addr_t dma_handle);
+
+void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+		    enum dma_data_direction dir);
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+#define dma_is_consistent(d, h) (1)
+
+static inline dma_addr_t dma_map_single(struct device *dev,
+					void *ptr, size_t size,
+					enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+	if (dev->bus == &pci_bus_type)
+		return virt_to_phys(ptr);
+#endif
+	dma_cache_sync(dev, ptr, size, dir);
+
+	return virt_to_phys(ptr);
+}
+
+#define dma_unmap_single(dev, addr, size, dir)	do { } while (0)
+
+static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
+			     int nents, enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nents; i++) {
+#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+		dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
+#endif
+		sg[i].dma_address = sg_phys(&sg[i]);
+	}
+
+	return nents;
+}
+
+#define dma_unmap_sg(dev, sg, nents, dir)	do { } while (0)
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+				      unsigned long offset, size_t size,
+				      enum dma_data_direction dir)
+{
+	return dma_map_single(dev, page_address(page) + offset, size, dir);
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+				  size_t size, enum dma_data_direction dir)
+{
+	dma_unmap_single(dev, dma_address, size, dir);
+}
+
+static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
+				   size_t size, enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+	if (dev->bus == &pci_bus_type)
+		return;
+#endif
+	dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
+}
+
+static inline void dma_sync_single_range(struct device *dev,
+					 dma_addr_t dma_handle,
+					 unsigned long offset, size_t size,
+					 enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+	if (dev->bus == &pci_bus_type)
+		return;
+#endif
+	dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
+}
+
+static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
+			       int nelems, enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nelems; i++) {
+#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+		dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
+#endif
+		sg[i].dma_address = sg_phys(&sg[i]);
+	}
+}
+
+static inline void dma_sync_single_for_cpu(struct device *dev,
+					   dma_addr_t dma_handle, size_t size,
+					   enum dma_data_direction dir)
+{
+	dma_sync_single(dev, dma_handle, size, dir);
+}
+
+static inline void dma_sync_single_for_device(struct device *dev,
+					      dma_addr_t dma_handle,
+					      size_t size,
+					      enum dma_data_direction dir)
+{
+	dma_sync_single(dev, dma_handle, size, dir);
+}
+
+static inline void dma_sync_single_range_for_cpu(struct device *dev,
+						 dma_addr_t dma_handle,
+						 unsigned long offset,
+						 size_t size,
+						 enum dma_data_direction direction)
+{
+	dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
+}
+
+static inline void dma_sync_single_range_for_device(struct device *dev,
+						    dma_addr_t dma_handle,
+						    unsigned long offset,
+						    size_t size,
+						    enum dma_data_direction direction)
+{
+	dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+}
+
+
+static inline void dma_sync_sg_for_cpu(struct device *dev,
+				       struct scatterlist *sg, int nelems,
+				       enum dma_data_direction dir)
+{
+	dma_sync_sg(dev, sg, nelems, dir);
+}
+
+static inline void dma_sync_sg_for_device(struct device *dev,
+					  struct scatterlist *sg, int nelems,
+					  enum dma_data_direction dir)
+{
+	dma_sync_sg(dev, sg, nelems, dir);
+}
+
+
+static inline int dma_get_cache_alignment(void)
+{
+	/*
+	 * Each processor family will define its own L1_CACHE_SHIFT,
+	 * L1_CACHE_BYTES wraps to this, so this is always safe.
+	 */
+	return L1_CACHE_BYTES;
+}
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return dma_addr == 0;
+}
+
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+
+extern int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+			    dma_addr_t device_addr, size_t size, int flags);
+
+extern void
+dma_release_declared_memory(struct device *dev);
+
+extern void *
+dma_mark_declared_memory_occupied(struct device *dev,
+				  dma_addr_t device_addr, size_t size);
+
+#endif /* __ASM_SH_DMA_MAPPING_H */