Linux Kernel  3.7.1
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memory.h
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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 PLAT_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