1/*
2 *  linux/include/asm-arm/arch-rpc/memory.h
3 *
4 *  Copyright (C) 1996,1997,1998 Russell King.
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 version 2 as
8 * published by the Free Software Foundation.
9 *
10 *  Changelog:
11 *   20-Oct-1996 RMK	Created
12 *   31-Dec-1997 RMK	Fixed definitions to reduce warnings
13 *   11-Jan-1998 RMK	Uninlined to reduce hits on cache
14 *   08-Feb-1998 RMK	Added __virt_to_bus and __bus_to_virt
15 *   21-Mar-1999 RMK	Renamed to memory.h
16 *		 RMK	Added TASK_SIZE and PAGE_OFFSET
17 */
18#ifndef __ASM_ARCH_MMU_H
19#define __ASM_ARCH_MMU_H
20
21/*
22 * Task size: 3GB
23 */
24#define TASK_SIZE	(0xc0000000UL)
25#define TASK_SIZE_26	(0x04000000UL)
26
27/*
28 * This decides where the kernel will search for a free chunk of vm
29 * space during mmap's.
30 */
31#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
32
33/*
34 * Page offset: 3GB
35 */
36#define PAGE_OFFSET	(0xc0000000UL)
37#define PHYS_OFFSET	(0x10000000UL)
38
39#define __virt_to_phys__is_a_macro
40#define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET)
41#define __phys_to_virt__is_a_macro
42#define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET)
43
44/*
45 * These are exactly the same on the RiscPC as the
46 * physical memory view.
47 */
48#define __virt_to_bus__is_a_macro
49#define __virt_to_bus(x) __virt_to_phys(x)
50#define __bus_to_virt__is_a_macro
51#define __bus_to_virt(x) __phys_to_virt(x)
52
53#define PHYS_TO_NID(addr)	(0)
54
55#endif
56