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/
usr/
src/
linux-headers-3.0.0-14/
arch/
mips/
include/
asm/
mach-loongson/
- drwxr-xr-x
|
Viewing file:  dma-coherence.h (1.71 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* 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, 07 Ralf Baechle <ralf@linux-mips.org>
* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
* Author: Fuxin Zhang, zhangfx@lemote.com
*
*/
#ifndef __ASM_MACH_LOONGSON_DMA_COHERENCE_H
#define __ASM_MACH_LOONGSON_DMA_COHERENCE_H
struct device;
static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
size_t size)
{
return virt_to_phys(addr) | 0x80000000;
}
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
return page_to_phys(page) | 0x80000000;
}
static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
dma_addr_t dma_addr)
{
#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff);
#else
return dma_addr & 0x7fffffff;
#endif
}
static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction direction)
{
}
static inline int plat_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 < DMA_BIT_MASK(24))
return 0;
return 1;
}
static inline void plat_extra_sync_for_device(struct device *dev)
{
return;
}
static inline int plat_dma_mapping_error(struct device *dev,
dma_addr_t dma_addr)
{
return 0;
}
static inline int plat_device_is_coherent(struct device *dev)
{
return 0;
}
#endif /* __ASM_MACH_LOONGSON_DMA_COHERENCE_H */
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