1/*
2 *  linux/include/asm-arm/arch-integrator/mmu.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_MMU_H
21#define __ASM_ARCH_MMU_H
22
23/*
24 * Task size: 3GB
25 */
26#define TASK_SIZE	(0xc0000000UL)
27#define TASK_SIZE_26	(0x04000000UL)
28
29/*
30 * This decides where the kernel will search for a free chunk of vm
31 * space during mmap's.
32 */
33#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
34
35/*
36 * Page offset: 3GB
37 */
38#define PAGE_OFFSET	(0xc0000000UL)
39#define PHYS_OFFSET	(0x00000000UL)
40
41/*
42 * On integrator, the dram is contiguous
43 */
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)
48
49/*
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.
55 */
56#define __virt_to_bus__is_a_macro
57#define __virt_to_bus(x)	(x - PAGE_OFFSET + INTEGRATOR_HDR0_SDRAM_BASE)
58#define __bus_to_virt__is_a_macro
59#define __bus_to_virt(x)	(x - INTEGRATOR_HDR0_SDRAM_BASE + PAGE_OFFSET)
60
61#define PHYS_TO_NID(addr)	(0)
62
63#endif
64