Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linux
[pandora-kernel.git] / arch / arm / mach-footbridge / include / mach / memory.h
1 /*
2  *  arch/arm/mach-footbridge/include/mach/memory.h
3  *
4  *  Copyright (C) 1996-1999 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  *   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.
16  *                      Renamed to memory.h
17  *                      Moved PAGE_OFFSET and TASK_SIZE here
18  */
19 #ifndef __ASM_ARCH_MEMORY_H
20 #define __ASM_ARCH_MEMORY_H
21
22
23 #if defined(CONFIG_FOOTBRIDGE_ADDIN)
24 /*
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
27  * PCI BAR
28  */
29 #ifndef __ASSEMBLY__
30 extern unsigned long __virt_to_bus(unsigned long);
31 extern unsigned long __bus_to_virt(unsigned long);
32 extern unsigned long __pfn_to_bus(unsigned long);
33 extern unsigned long __bus_to_pfn(unsigned long);
34 #endif
35 #define __virt_to_bus   __virt_to_bus
36 #define __bus_to_virt   __bus_to_virt
37
38 #elif defined(CONFIG_FOOTBRIDGE_HOST)
39
40 /*
41  * The footbridge is programmed to expose the system RAM at 0xe0000000.
42  * The requirement is that the RAM isn't placed at bus address 0, which
43  * would clash with VGA cards.
44  */
45 #define BUS_OFFSET              0xe0000000
46 #define __virt_to_bus(x)        ((x) + (BUS_OFFSET - PAGE_OFFSET))
47 #define __bus_to_virt(x)        ((x) - (BUS_OFFSET - PAGE_OFFSET))
48 #define __pfn_to_bus(x)         (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
49 #define __bus_to_pfn(x)         __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
50
51 #else
52
53 #error "Undefined footbridge mode"
54
55 #endif
56
57 /*
58  * Cache flushing area.
59  */
60 #define FLUSH_BASE              0xf9000000
61
62 /*
63  * Physical DRAM offset.
64  */
65 #define PLAT_PHYS_OFFSET                UL(0x00000000)
66
67 #define FLUSH_BASE_PHYS         0x50000000
68
69 #endif