// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> */#include <linux/dma-direct.h>#include <asm/ip32/crime.h>/* * Few notes. * 1. CPU sees memory as two chunks: 0-256M@0x0, and the rest @0x40000000+256M * 2. PCI sees memory as one big chunk @0x0 (or we could use 0x40000000 for * native-endian) * 3. All other devices see memory as one big chunk at 0x40000000 * 4. Non-PCI devices will pass NULL as struct device* * * Thus we translate differently, depending on device. */#define RAM_OFFSET_MASK 0x3fffffffULdma_addr_t__phys_to_dma(structdevice*dev,phys_addr_tpaddr){dma_addr_tdma_addr=paddr&RAM_OFFSET_MASK;if(!dev)dma_addr+=CRIME_HI_MEM_BASE;returndma_addr;}phys_addr_t__dma_to_phys(structdevice*dev,dma_addr_tdma_addr){phys_addr_tpaddr=dma_addr&RAM_OFFSET_MASK;if(dma_addr>=256*1024*1024)paddr+=CRIME_HI_MEM_BASE;returnpaddr;}