text: /*
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>
   * Copyright (C) 2000, 2001, 06  Ralf Baechle <ralf@linux-mips.org>
   * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
   */
  
  #include <linux/types.h>
  #include <linux/dma-mapping.h>
  #include <linux/mm.h>
  #include <linux/module.h>
  #include <linux/string.h>
  
  #include <asm/cache.h>
  #include <asm/io.h>
  
  #include <dma-coherence.h>
  
  #include <linux/pci.h>
  
  dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
  	struct page *page, unsigned long offset, int direction)
  {
  	struct device *dev = &pdev->dev;
  
  	BUG_ON(direction == DMA_NONE);
  
  	if (!plat_device_is_coherent(dev)) {
  		unsigned long addr;
  
  		addr = (unsigned long) page_address(page) + offset;
  		dma_cache_wback_inv(addr, PAGE_SIZE);
  	}
  
  	return plat_map_dma_mem_page(dev, page) + offset;
  }
  
  EXPORT_SYMBOL(pci_dac_page_to_dma);
  
  struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
  	dma64_addr_t dma_addr)
  {
  	return pfn_to_page(plat_dma_addr_to_phys(dma_addr) >> PAGE_SHIFT);
  }
  
  EXPORT_SYMBOL(pci_dac_dma_to_page);
  
  unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
  	dma64_addr_t dma_addr)
  {
  	return dma_addr & ~PAGE_MASK;
  }
  
  EXPORT_SYMBOL(pci_dac_dma_to_offset);
  
  void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
  	dma64_addr_t dma_addr, size_t len, int direction)
  {
  	BUG_ON(direction == PCI_DMA_NONE);
  
  	if (!plat_device_is_coherent(&pdev->dev))
  		dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
  }
  
  EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
  
  void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
  	dma64_addr_t dma_addr, size_t len, int direction)
  {
  	BUG_ON(direction == PCI_DMA_NONE);
  
  	if (!plat_device_is_coherent(&pdev->dev))
  		dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
  }
  
  EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
  