summaryrefslogtreecommitdiffstats
path: root/include/asm-arm/arch-ebsa285/memory.h
blob: 99181ffc7e27977899929aa65eed85501403bb36 (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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/*
 *  linux/include/asm-arm/arch-ebsa285/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

#include <linux/config.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);
#endif

#elif defined(CONFIG_FOOTBRIDGE_HOST)

#define __virt_to_bus(x)	((x) - 0xe0000000)
#define __bus_to_virt(x)	((x) + 0xe0000000)

#else

#error "Undefined footbridge mode"

#endif

#if defined(CONFIG_ARCH_FOOTBRIDGE)

/* Task size and page offset at 3GB */
#define TASK_SIZE		UL(0xbf000000)
#define PAGE_OFFSET		UL(0xc0000000)

/*
 * Cache flushing area.
 */
#define FLUSH_BASE		0xf9000000

#elif defined(CONFIG_ARCH_CO285)

/* Task size and page offset at 1.5GB */
#define TASK_SIZE		UL(0x5f000000)
#define PAGE_OFFSET		UL(0x60000000)

/*
 * Cache flushing area.
 */
#define FLUSH_BASE		0x7e000000

#else

#error "Undefined footbridge architecture"

#endif

/*
 * Physical DRAM offset.
 */
#define PHYS_OFFSET		UL(0x00000000)

/*
 * This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE ((TASK_SIZE + 0x01000000) / 3)

#define FLUSH_BASE_PHYS		0x50000000

#endif
OpenPOWER on IntegriCloud