arch/mips/loongson64/lemote-2f/dma.c


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// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-direct.h>

dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
{
	return paddr | 0x80000000;
}

phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr)
{
	if (dma_addr > 0x8fffffff)
		return dma_addr;
	return dma_addr & 0x0fffffff;
}