1/* 2 * arch/arm/mach-integrator/include/mach/memory.h 3 * 4 * Copyright (C) 1999 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#define BUS_OFFSET UL(0x80000000) 29#define __virt_to_bus(x) ((x) - PAGE_OFFSET + BUS_OFFSET) 30#define __bus_to_virt(x) ((x) - BUS_OFFSET + PAGE_OFFSET) 31#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET)) 32#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET)) 33 34#endif 35