blob: 6f2ecccdf3235730fdcdcf6c01677bbb38e82b08 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* arch/arm/mach-footbridge/include/mach/memory.h
*
* Copyright (C) 1996-1999 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Changelog:
* 20-Oct-1996 RMK Created
* 31-Dec-1997 RMK Fixed definitions to reduce warnings.
* 17-May-1998 DAG Added __virt_to_bus and __bus_to_virt functions.
* 21-Nov-1998 RMK Changed __virt_to_bus and __bus_to_virt to macros.
* 21-Mar-1999 RMK Added PAGE_OFFSET for co285 architecture.
* Renamed to memory.h
* Moved PAGE_OFFSET and TASK_SIZE here
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
#if defined(CONFIG_FOOTBRIDGE_ADDIN)
/*
* If we may be using add-in footbridge mode, then we must
* use the out-of-line translation that makes use of the
* PCI BAR
*/
#ifndef __ASSEMBLY__
extern unsigned long __virt_to_bus(unsigned long);
extern unsigned long __bus_to_virt(unsigned long);
extern unsigned long __pfn_to_bus(unsigned long);
extern unsigned long __bus_to_pfn(unsigned long);
#endif
#define __virt_to_bus __virt_to_bus
#define __bus_to_virt __bus_to_virt
#elif defined(CONFIG_FOOTBRIDGE_HOST)
/*
* The footbridge is programmed to expose the system RAM at 0xe0000000.
* The requirement is that the RAM isn't placed at bus address 0, which
* would clash with VGA cards.
*/
#define BUS_OFFSET 0xe0000000
#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET))
#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET))
#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
#else
#error "Undefined footbridge mode"
#endif
/*
* Cache flushing area.
*/
#define FLUSH_BASE 0xf9000000
#define FLUSH_BASE_PHYS 0x50000000
#endif
|
