dma.c (309B)
1// SPDX-License-Identifier: GPL-2.0 2#include <linux/dma-direct.h> 3 4dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) 5{ 6 return paddr | 0x80000000; 7} 8 9phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr) 10{ 11 if (dma_addr > 0x8fffffff) 12 return dma_addr; 13 return dma_addr & 0x0fffffff; 14}