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