1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
7 * Copyright (C) 2000, 2002  Maciej W. Rozycki
8 * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
9 */
10#ifndef _ASM_MACH_GENERIC_SPACES_H
11#define _ASM_MACH_GENERIC_SPACES_H
12
13#include <linux/const.h>
14
15/*
16 * This gives the physical RAM offset.
17 */
18#ifndef PHYS_OFFSET
19#define PHYS_OFFSET		_AC(0, UL)
20#endif
21
22#ifdef CONFIG_32BIT
23#ifdef CONFIG_KVM_GUEST
24#define CAC_BASE		_AC(0x40000000, UL)
25#else
26#define CAC_BASE		_AC(0x80000000, UL)
27#endif
28#ifndef IO_BASE
29#define IO_BASE			_AC(0xa0000000, UL)
30#endif
31#ifndef UNCAC_BASE
32#define UNCAC_BASE		_AC(0xa0000000, UL)
33#endif
34
35#ifndef MAP_BASE
36#ifdef CONFIG_KVM_GUEST
37#define MAP_BASE		_AC(0x60000000, UL)
38#else
39#define MAP_BASE		_AC(0xc0000000, UL)
40#endif
41#endif
42
43/*
44 * Memory above this physical address will be considered highmem.
45 */
46#ifndef HIGHMEM_START
47#define HIGHMEM_START		_AC(0x20000000, UL)
48#endif
49
50#endif /* CONFIG_32BIT */
51
52#ifdef CONFIG_64BIT
53
54#ifndef CAC_BASE
55#ifdef CONFIG_DMA_NONCOHERENT
56#define CAC_BASE		_AC(0x9800000000000000, UL)
57#else
58#define CAC_BASE		_AC(0xa800000000000000, UL)
59#endif
60#endif
61
62#ifndef IO_BASE
63#define IO_BASE			_AC(0x9000000000000000, UL)
64#endif
65
66#ifndef UNCAC_BASE
67#define UNCAC_BASE		_AC(0x9000000000000000, UL)
68#endif
69
70#ifndef MAP_BASE
71#define MAP_BASE		_AC(0xc000000000000000, UL)
72#endif
73
74/*
75 * Memory above this physical address will be considered highmem.
76 * Fixme: 59 bits is a fictive number and makes assumptions about processors
77 * in the distant future.  Nobody will care for a few years :-)
78 */
79#ifndef HIGHMEM_START
80#define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
81#endif
82
83#define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
84#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
85#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
86
87#endif /* CONFIG_64BIT */
88
89/*
90 * This handles the memory map.
91 */
92#ifndef PAGE_OFFSET
93#define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
94#endif
95
96#ifndef FIXADDR_TOP
97#ifdef CONFIG_KVM_GUEST
98#define FIXADDR_TOP		((unsigned long)(long)(int)0x7ffe0000)
99#else
100#define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
101#endif
102#endif
103
104#endif /* __ASM_MACH_GENERIC_SPACES_H */
105