2 * linux/include/asm-arm/arch-ebsa285/memory.h
4 * Copyright (C) 1996-1999 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 * 17-May-1998 DAG Added __virt_to_bus and __bus_to_virt functions.
14 * 21-Nov-1998 RMK Changed __virt_to_bus and __bus_to_virt to macros.
15 * 21-Mar-1999 RMK Added PAGE_OFFSET for co285 architecture.
17 * Moved PAGE_OFFSET and TASK_SIZE here
19 #ifndef __ASM_ARCH_MEMORY_H
20 #define __ASM_ARCH_MEMORY_H
23 #if defined(CONFIG_FOOTBRIDGE_ADDIN)
25 * If we may be using add-in footbridge mode, then we must
26 * use the out-of-line translation that makes use of the
30 extern unsigned long __virt_to_bus(unsigned long);
31 extern unsigned long __bus_to_virt(unsigned long);
34 #elif defined(CONFIG_FOOTBRIDGE_HOST)
36 #define __virt_to_bus(x) ((x) - 0xe0000000)
37 #define __bus_to_virt(x) ((x) + 0xe0000000)
41 #error "Undefined footbridge mode"
45 #if defined(CONFIG_ARCH_FOOTBRIDGE)
47 /* Task size and page offset at 3GB */
48 #define TASK_SIZE UL(0xbf000000)
49 #define PAGE_OFFSET UL(0xc0000000)
52 * Cache flushing area.
54 #define FLUSH_BASE 0xf9000000
56 #elif defined(CONFIG_ARCH_CO285)
58 /* Task size and page offset at 1.5GB */
59 #define TASK_SIZE UL(0x5f000000)
60 #define PAGE_OFFSET UL(0x60000000)
63 * Cache flushing area.
65 #define FLUSH_BASE 0x7e000000
69 #error "Undefined footbridge architecture"
74 * Physical DRAM offset.
76 #define PHYS_OFFSET UL(0x00000000)
79 * This decides where the kernel will search for a free chunk of vm
80 * space during mmap's.
82 #define TASK_UNMAPPED_BASE ((TASK_SIZE + 0x01000000) / 3)
84 #define FLUSH_BASE_PHYS 0x50000000