loongson2ef/lemote-2f/dma.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/dma-direct.h>
0003
0004 dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
0005 {
0006     return paddr | 0x80000000;
0007 }
0008
0009 phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
0010 {
0011     if (dma_addr > 0x8fffffff)
0012         return dma_addr;
0013     return dma_addr & 0x0fffffff;
0014 }