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/*
* 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) 2006 Ralf Baechle <ralf@linux-mips.org>
* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
*
*/
#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
#if 0
#define PCI_DMA_OFFSET 0x20000000
#else
#define PCI_DMA_OFFSET 0x00000000
#endif
struct device;
static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
{
return virt_to_phys(addr) + (dev != NULL ? PCI_DMA_OFFSET : 0);
}
static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
{
return page_to_phys(page) + (dev != NULL ? PCI_DMA_OFFSET : 0);
}
static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
{
return (dma_addr > PCI_DMA_OFFSET ? dma_addr - PCI_DMA_OFFSET : dma_addr);
}
static void plat_unmap_dma_mem(dma_addr_t dma_addr)
{
}
static inline int plat_device_is_coherent(struct device *dev)
{
return 0;
}
#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
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