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#include <asm/mipsregs.h>
16
17#ifndef IO_SPACE_LIMIT
18#define IO_SPACE_LIMIT 0xffff
19#endif
20
21/*
22 * This gives the physical RAM offset.
23 */
24#ifndef __ASSEMBLY__
25# if defined(CONFIG_MIPS_AUTO_PFN_OFFSET)
26#  define PHYS_OFFSET		((unsigned long)PFN_PHYS(ARCH_PFN_OFFSET))
27# elif !defined(PHYS_OFFSET)
28#  define PHYS_OFFSET		_AC(0, UL)
29# endif
30#endif /* __ASSEMBLY__ */
31
32#ifdef CONFIG_32BIT
33#ifdef CONFIG_KVM_GUEST
34#define CAC_BASE		_AC(0x40000000, UL)
35#else
36#define CAC_BASE		_AC(0x80000000, UL)
37#endif
38#ifndef IO_BASE
39#define IO_BASE			_AC(0xa0000000, UL)
40#endif
41#ifndef UNCAC_BASE
42#define UNCAC_BASE		_AC(0xa0000000, UL)
43#endif
44
45#ifndef MAP_BASE
46#ifdef CONFIG_KVM_GUEST
47#define MAP_BASE		_AC(0x60000000, UL)
48#else
49#define MAP_BASE		_AC(0xc0000000, UL)
50#endif
51#endif
52
53/*
54 * Memory above this physical address will be considered highmem.
55 */
56#ifndef HIGHMEM_START
57#define HIGHMEM_START		_AC(0x20000000, UL)
58#endif
59
60#endif /* CONFIG_32BIT */
61
62#ifdef CONFIG_64BIT
63
64#ifndef CAC_BASE
65#define CAC_BASE	PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0)
66#endif
67
68#ifndef IO_BASE
69#define IO_BASE			_AC(0x9000000000000000, UL)
70#endif
71
72#ifndef UNCAC_BASE
73#define UNCAC_BASE		_AC(0x9000000000000000, UL)
74#endif
75
76#ifndef MAP_BASE
77#define MAP_BASE		_AC(0xc000000000000000, UL)
78#endif
79
80/*
81 * Memory above this physical address will be considered highmem.
82 * Fixme: 59 bits is a fictive number and makes assumptions about processors
83 * in the distant future.  Nobody will care for a few years :-)
84 */
85#ifndef HIGHMEM_START
86#define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
87#endif
88
89#define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
90#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
91#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
92
93#endif /* CONFIG_64BIT */
94
95/*
96 * This handles the memory map.
97 */
98#ifndef PAGE_OFFSET
99#define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
100#endif
101
102#ifndef FIXADDR_TOP
103#ifdef CONFIG_KVM_GUEST
104#define FIXADDR_TOP		((unsigned long)(long)(int)0x7ffe0000)
105#else
106#define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
107#endif
108#endif
109
110#endif /* __ASM_MACH_GENERIC_SPACES_H */
111