2 * linux/include/asm-arm/arch-rpc/memory.h
4 * Copyright (C) 1996,1997,1998 Russell King.
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.
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
18 #ifndef __ASM_ARCH_MMU_H
19 #define __ASM_ARCH_MMU_H
24 #define TASK_SIZE (0xbf000000UL)
25 #define TASK_SIZE_26 (0x04000000UL)
28 * This decides where the kernel will search for a free chunk of vm
29 * space during mmap's.
31 #define TASK_UNMAPPED_BASE (0x40000000)
36 #define PAGE_OFFSET (0xc0000000UL)
37 #define PHYS_OFFSET (0x10000000UL)
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)
45 * These are exactly the same on the RiscPC as the
46 * physical memory view.
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)