/* DMA mapping. Nothing tricky here, just virt_to_phys */

  #ifndef _ASM_CRIS_DMA_MAPPING_H
  #define _ASM_CRIS_DMA_MAPPING_H

  #include <linux/mm.h>
  #include <linux/kernel.h>

  #include <asm/cache.h>
  #include <asm/io.h>
  #include <asm/scatterlist.h>

  #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)
  
  #ifdef CONFIG_PCI
  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);
  #else

  static inline void *
  dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,

                     gfp_t flag)

  {

          BUG();
          return NULL;

  }
  
  static inline void
  dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,

                      dma_addr_t dma_handle)

  {

          BUG();

  }

  #endif

  static inline dma_addr_t

  dma_map_single(struct device *dev, void *ptr, size_t size,

  	       enum dma_data_direction direction)
  {

  	BUG_ON(direction == DMA_NONE);
  	return virt_to_phys(ptr);

  }
  
  static inline void
  dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
  		 enum dma_data_direction direction)
  {

  	BUG_ON(direction == DMA_NONE);
  }
  
  static inline int
  dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  	   enum dma_data_direction direction)
  {
  	printk("Map sg
  ");
  	return nents;

  }
  
  static inline dma_addr_t

  dma_map_page(struct device *dev, struct page *page, unsigned long offset,
  	     size_t size, enum dma_data_direction direction)

  {

  	BUG_ON(direction == DMA_NONE);
  	return page_to_phys(page) + offset;

  }
  
  static inline void
  dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  	       enum dma_data_direction direction)
  {

  	BUG_ON(direction == DMA_NONE);

  }

  
  static inline void
  dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
  	     enum dma_data_direction direction)
  {

  	BUG_ON(direction == DMA_NONE);

  }
  
  static inline void

  dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
  			enum dma_data_direction direction)

  {

  }
  
  static inline void

  dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
  			enum dma_data_direction direction)

  {

  }

  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)
  {
  }

  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)
  {
  }

  static inline void
  dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
  		    enum dma_data_direction direction)

  {

  }
  
  static inline void

  dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
  		    enum dma_data_direction direction)

  {

  }

  static inline int
  dma_mapping_error(dma_addr_t dma_addr)
  {
  	return 0;
  }
  
  static inline int
  dma_supported(struct device *dev, u64 mask)
  {
          /*
           * we fall back to GFP_DMA when the mask isn't all 1s,
           * so we can't guarantee allocations that must be
           * within a tighter range than GFP_DMA..
           */
          if(mask < 0x00ffffff)
                  return 0;
  
  	return 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;
  }
  
  static inline int
  dma_get_cache_alignment(void)
  {

  	return (1 << INTERNODE_CACHE_SHIFT);

  }

  #define dma_is_consistent(d, h)	(1)

  static inline void

  dma_cache_sync(struct device *dev, void *vaddr, size_t size,

  	       enum dma_data_direction direction)
  {

  }

  #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