| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-versatile/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 | */ |
| Nicolas Pitre | f09b997 | 2005-10-29 21:44:55 +0100 | [diff] [blame] | 26 | #define PHYS_OFFSET UL(0x00000000) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |