2 * linux/include/asm-arm/arch-versatile/memory.h
4 * Copyright (C) 2003 ARM Limited
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.
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.
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
20 #ifndef __ASM_ARCH_MMU_H
21 #define __ASM_ARCH_MMU_H
26 #define TASK_SIZE (0xbf000000UL)
27 #define TASK_SIZE_26 (0x04000000UL)
30 * This decides where the kernel will search for a free chunk of vm
31 * space during mmap's.
33 #define TASK_UNMAPPED_BASE (0x40000000)
38 #define PAGE_OFFSET (0xc0000000UL)
39 #define PHYS_OFFSET (0x00000000UL)
42 * On Versatile PB, the dram is contiguous
44 #define __virt_to_phys__is_a_macro
45 #define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET)
46 #define __phys_to_virt__is_a_macro
47 #define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET)
50 * Virtual view <-> DMA view memory address translations
51 * virt_to_bus: Used to translate the virtual address to an
52 * address suitable to be passed to set_dma_addr
53 * bus_to_virt: Used to convert an address for DMA operations
54 * to an address that the kernel can use.
56 #define __virt_to_bus__is_a_macro
57 #define __virt_to_bus(x) ((x) - PAGE_OFFSET)
58 #define __bus_to_virt__is_a_macro
59 #define __bus_to_virt(x) ((x) + PAGE_OFFSET)