/* Glue code to lib/swiotlb.c */
  
  #include <linux/pci.h>

  #include <linux/gfp.h>

  #include <linux/cache.h>
  #include <linux/module.h>
  #include <linux/dma-mapping.h>
  
  #include <asm/swiotlb.h>
  #include <asm/dma.h>
  #include <asm/iommu.h>
  #include <asm/machvec.h>
  
  int swiotlb __read_mostly;
  EXPORT_SYMBOL(swiotlb);

  static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
  					 dma_addr_t *dma_handle, gfp_t gfp)
  {

  	if (dev->coherent_dma_mask != DMA_BIT_MASK(64))

  		gfp |= GFP_DMA;
  	return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
  }

  struct dma_map_ops swiotlb_dma_ops = {

  	.alloc_coherent = ia64_swiotlb_alloc_coherent,

  	.free_coherent = swiotlb_free_coherent,

  	.map_page = swiotlb_map_page,
  	.unmap_page = swiotlb_unmap_page,
  	.map_sg = swiotlb_map_sg_attrs,
  	.unmap_sg = swiotlb_unmap_sg_attrs,

  	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
  	.sync_single_for_device = swiotlb_sync_single_for_device,

  	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
  	.sync_sg_for_device = swiotlb_sync_sg_for_device,

  	.dma_supported = swiotlb_dma_supported,

  	.mapping_error = swiotlb_dma_mapping_error,

  };

  void __init swiotlb_dma_init(void)

  {
  	dma_ops = &swiotlb_dma_ops;

  	swiotlb_init(1);

  }

  void __init pci_swiotlb_init(void)
  {

  	if (!iommu_detected) {

  #ifdef CONFIG_IA64_GENERIC
  		swiotlb = 1;
  		printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.
  ");
  		machvec_init("dig");

  		swiotlb_init(1);

  		dma_ops = &swiotlb_dma_ops;
  #else
  		panic("Unable to find Intel IOMMU");
  #endif
  	}
  }