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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#define CAC_BASE _AC(0x80000000, UL)
34#ifndef IO_BASE
35#define IO_BASE _AC(0xa0000000, UL)
36#endif
37#ifndef UNCAC_BASE
38#define UNCAC_BASE _AC(0xa0000000, UL)
39#endif
40
41#ifndef MAP_BASE
42#define MAP_BASE _AC(0xc0000000, UL)
43#endif
44
45/*
46 * Memory above this physical address will be considered highmem.
47 */
48#ifndef HIGHMEM_START
49#define HIGHMEM_START _AC(0x20000000, UL)
50#endif
51
52#endif /* CONFIG_32BIT */
53
54#ifdef CONFIG_64BIT
55
56#ifndef CAC_BASE
57#define CAC_BASE PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0)
58#endif
59
60#ifndef IO_BASE
61#define IO_BASE _AC(0x9000000000000000, UL)
62#endif
63
64#ifndef UNCAC_BASE
65#define UNCAC_BASE _AC(0x9000000000000000, UL)
66#endif
67
68#ifndef MAP_BASE
69#define MAP_BASE _AC(0xc000000000000000, UL)
70#endif
71
72/*
73 * Memory above this physical address will be considered highmem.
74 * Fixme: 59 bits is a fictive number and makes assumptions about processors
75 * in the distant future. Nobody will care for a few years :-)
76 */
77#ifndef HIGHMEM_START
78#define HIGHMEM_START (_AC(1, UL) << _AC(59, UL))
79#endif
80
81#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
82#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
83#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
84
85#endif /* CONFIG_64BIT */
86
87/*
88 * This handles the memory map.
89 */
90#ifndef PAGE_OFFSET
91#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
92#endif
93
94#ifndef FIXADDR_TOP
95#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
96#endif
97
98#endif /* __ASM_MACH_GENERIC_SPACES_H */
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 */