Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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) 1996, 99 Ralf Baechle
7 * Copyright (C) 2000, 2002 Maciej W. Rozycki
8 * Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
9 */
10#ifndef _ASM_ADDRSPACE_H
11#define _ASM_ADDRSPACE_H
12
13#include <spaces.h>
14
15/*
16 * Configure language
17 */
18#ifdef __ASSEMBLY__
19#define _ATYPE_
20#define _ATYPE32_
21#define _ATYPE64_
22#define _LLCONST_(x) x
23#else
24#define _ATYPE_ __PTRDIFF_TYPE__
25#define _ATYPE32_ int
26#define _ATYPE64_ long long
27#define _LLCONST_(x) x ## LL
28#endif
29
30/*
31 * 32-bit MIPS address spaces
32 */
33#ifdef __ASSEMBLY__
34#define _ACAST32_
35#define _ACAST64_
36#else
37#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
38#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
39#endif
40
41/*
42 * Returns the kernel segment base of a given address
43 */
44#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
45
46/*
47 * Returns the physical address of a CKSEGx / XKPHYS address
48 */
49#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
50#define XPHYSADDR(a) ((_ACAST64_(a)) & \
51 _LLCONST_(0x000000ffffffffff))
52
53#ifdef CONFIG_64BIT
54
55/*
56 * Memory segments (64bit kernel mode addresses)
57 * The compatibility segments use the full 64-bit sign extended value. Note
58 * the R8000 doesn't have them so don't reference these in generic MIPS code.
59 */
60#define XKUSEG _LLCONST_(0x0000000000000000)
61#define XKSSEG _LLCONST_(0x4000000000000000)
62#define XKPHYS _LLCONST_(0x8000000000000000)
63#define XKSEG _LLCONST_(0xc000000000000000)
64#define CKSEG0 _LLCONST_(0xffffffff80000000)
65#define CKSEG1 _LLCONST_(0xffffffffa0000000)
66#define CKSSEG _LLCONST_(0xffffffffc0000000)
67#define CKSEG3 _LLCONST_(0xffffffffe0000000)
68
69#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
70#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
71#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
72#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
73
74#else
75
76#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
77#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
78#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
79#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
80
81/*
82 * Map an address to a certain kernel segment
83 */
84#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
85#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
86#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
87#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
88
89/*
90 * Memory segments (32bit kernel mode addresses)
91 * These are the traditional names used in the 32-bit universe.
92 */
93#define KUSEG 0x00000000
94#define KSEG0 0x80000000
95#define KSEG1 0xa0000000
96#define KSEG2 0xc0000000
97#define KSEG3 0xe0000000
98
99#define CKUSEG 0x00000000
100#define CKSEG0 0x80000000
101#define CKSEG1 0xa0000000
102#define CKSEG2 0xc0000000
103#define CKSEG3 0xe0000000
104
105#endif
106
107/*
108 * Cache modes for XKPHYS address conversion macros
109 */
110#define K_CALG_COH_EXCL1_NOL2 0
111#define K_CALG_COH_SHRL1_NOL2 1
112#define K_CALG_UNCACHED 2
113#define K_CALG_NONCOHERENT 3
114#define K_CALG_COH_EXCL 4
115#define K_CALG_COH_SHAREABLE 5
116#define K_CALG_NOTUSED 6
117#define K_CALG_UNCACHED_ACCEL 7
118
119/*
120 * 64-bit address conversions
121 */
122#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
123#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
124#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
125#define PHYS_TO_XKPHYS(cm,a) (_LLCONST_(0x8000000000000000) | \
126 ((cm)<<59) | (a))
127
128#if defined (CONFIG_CPU_R4300) \
129 || defined (CONFIG_CPU_R4X00) \
130 || defined (CONFIG_CPU_R5000) \
131 || defined (CONFIG_CPU_RM7000) \
132 || defined (CONFIG_CPU_NEVADA) \
133 || defined (CONFIG_CPU_TX49XX) \
134 || defined (CONFIG_CPU_MIPS64)
135#define TO_PHYS_MASK _LLCONST_(0x0000000fffffffff) /* 2^^36 - 1 */
136#endif
137
138#if defined (CONFIG_CPU_R8000)
139/* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
140#define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
141#endif
142
143#if defined (CONFIG_CPU_R10000)
144#define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
145#endif
146
147#if defined(CONFIG_CPU_SB1) || defined(CONFIG_CPU_SB1A)
148#define TO_PHYS_MASK _LLCONST_(0x00000fffffffffff) /* 2^^44 - 1 */
149#endif
150
151#ifndef CONFIG_CPU_R8000
152
153/*
154 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
155 * in order to catch bugs in the source code.
156 */
157
158#define COMPAT_K1BASE32 _LLCONST_(0xffffffffa0000000)
159#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
160
161#endif
162
163#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
164#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
165
166#endif /* _ASM_ADDRSPACE_H */