1/* 2 * linux/include/asm-arm/arch-realview/memory.h 3 * 4 * Copyright (C) 2003 ARM Limited 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20#ifndef __ASM_ARCH_MEMORY_H 21#define __ASM_ARCH_MEMORY_H 22 23/* 24 * Physical DRAM offset. 25 */ 26#define PHYS_OFFSET UL(0x00000000) 27 28/* 29 * Virtual view <-> DMA view memory address translations 30 * virt_to_bus: Used to translate the virtual address to an 31 * address suitable to be passed to set_dma_addr 32 * bus_to_virt: Used to convert an address for DMA operations 33 * to an address that the kernel can use. 34 */ 35#define __virt_to_bus(x) ((x) - PAGE_OFFSET) 36#define __bus_to_virt(x) ((x) + PAGE_OFFSET) 37 38#endif 39