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1da177e4 LT |
1 | /* |
2 | * linux/include/asm-arm/arch-imx/memory.h | |
3 | * | |
4 | * Copyright (C) 1999 ARM Limited | |
5 | * Copyright (C) 2002 Shane Nay (shane@minirl.com) | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #ifndef __ASM_ARCH_MMU_H | |
22 | #define __ASM_ARCH_MMU_H | |
23 | ||
f09b9979 | 24 | #define PHYS_OFFSET UL(0x08000000) |
1da177e4 LT |
25 | |
26 | /* | |
27 | * Virtual view <-> DMA view memory address translations | |
28 | * virt_to_bus: Used to translate the virtual address to an | |
29 | * address suitable to be passed to set_dma_addr | |
30 | * bus_to_virt: Used to convert an address for DMA operations | |
31 | * to an address that the kernel can use. | |
32 | */ | |
33 | #define __virt_to_bus__is_a_macro | |
34 | #define __virt_to_bus(x) (x - PAGE_OFFSET + PHYS_OFFSET) | |
35 | #define __bus_to_virt__is_a_macro | |
36 | #define __bus_to_virt(x) (x - PHYS_OFFSET + PAGE_OFFSET) | |
37 | ||
38 | #endif |