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/*
* OpenRISC Linux
*
* Linux architectural port borrowing liberally from similar works of
* others. All original copyrights apply as per the original source
* declaration.
*
* OpenRISC implementation:
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __ASM_OPENRISC_DMA_MAPPING_H
#define __ASM_OPENRISC_DMA_MAPPING_H
/*
* See Documentation/DMA-API-HOWTO.txt and
* Documentation/DMA-API.txt for documentation.
*/
#include <linux/dma-debug.h>
#include <linux/kmemcheck.h>
#include <linux/dma-mapping.h>
#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
extern struct dma_map_ops or1k_dma_map_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
return &or1k_dma_map_ops;
}
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 dma_mask)
{
/* Support 32 bit DMA mask exclusively */
return dma_mask == DMA_BIT_MASK(32);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
static inline int dma_set_mask(struct device *dev, u64 dma_mask)
{
if (!dev->dma_mask || !dma_supported(dev, dma_mask))
return -EIO;
*dev->dma_mask = dma_mask;
return 0;
}
#endif /* __ASM_OPENRISC_DMA_MAPPING_H */
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