Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 <linux/config.h>
14#include <spaces.h>
15
16/*
17 * Configure language
18 */
19#ifdef __ASSEMBLY__
20#define _ATYPE_
21#define _ATYPE32_
22#define _ATYPE64_
23#else
24#define _ATYPE_ __PTRDIFF_TYPE__
25#define _ATYPE32_ int
26#define _ATYPE64_ long long
27#endif
28
29/*
30 * 32-bit MIPS address spaces
31 */
32#ifdef __ASSEMBLY__
33#define _ACAST32_
34#define _ACAST64_
35#else
36#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
37#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
38#endif
39
40/*
41 * Returns the kernel segment base of a given address
42 */
43#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
44
45/*
46 * Returns the physical address of a CKSEGx / XKPHYS address
47 */
48#define CPHYSADDR(a) ((_ACAST32_ (a)) & 0x1fffffff)
49#define XPHYSADDR(a) ((_ACAST64_ (a)) & 0x000000ffffffffff)
50
51#ifdef CONFIG_MIPS64
52
53/*
54 * Memory segments (64bit kernel mode addresses)
55 * The compatibility segments use the full 64-bit sign extended value. Note
56 * the R8000 doesn't have them so don't reference these in generic MIPS code.
57 */
58#define XKUSEG 0x0000000000000000
59#define XKSSEG 0x4000000000000000
60#define XKPHYS 0x8000000000000000
61#define XKSEG 0xc000000000000000
62#define CKSEG0 0xffffffff80000000
63#define CKSEG1 0xffffffffa0000000
64#define CKSSEG 0xffffffffc0000000
65#define CKSEG3 0xffffffffe0000000
66
67#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
68#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
69#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
70#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
71
72#else
73
74#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
75#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
76#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
77#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
78
79/*
80 * Map an address to a certain kernel segment
81 */
82#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
83#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
84#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
85#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
86
87/*
88 * Memory segments (32bit kernel mode addresses)
89 * These are the traditional names used in the 32-bit universe.
90 */
91#define KUSEG 0x00000000
92#define KSEG0 0x80000000
93#define KSEG1 0xa0000000
94#define KSEG2 0xc0000000
95#define KSEG3 0xe0000000
96
97#define CKUSEG 0x00000000
98#define CKSEG0 0x80000000
99#define CKSEG1 0xa0000000
100#define CKSEG2 0xc0000000
101#define CKSEG3 0xe0000000
102
103#endif
104
105/*
106 * Cache modes for XKPHYS address conversion macros
107 */
108#define K_CALG_COH_EXCL1_NOL2 0
109#define K_CALG_COH_SHRL1_NOL2 1
110#define K_CALG_UNCACHED 2
111#define K_CALG_NONCOHERENT 3
112#define K_CALG_COH_EXCL 4
113#define K_CALG_COH_SHAREABLE 5
114#define K_CALG_NOTUSED 6
115#define K_CALG_UNCACHED_ACCEL 7
116
117/*
118 * 64-bit address conversions
119 */
120#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
121#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
122#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
123#define PHYS_TO_XKPHYS(cm,a) (0x8000000000000000 | ((cm)<<59) | (a))
124
125#if defined (CONFIG_CPU_R4300) \
126 || defined (CONFIG_CPU_R4X00) \
127 || defined (CONFIG_CPU_R5000) \
128 || defined (CONFIG_CPU_NEVADA) \
129 || defined (CONFIG_CPU_TX49XX) \
130 || defined (CONFIG_CPU_MIPS64)
131#define KUSIZE 0x0000010000000000 /* 2^^40 */
132#define KUSIZE_64 0x0000010000000000 /* 2^^40 */
133#define K0SIZE 0x0000001000000000 /* 2^^36 */
134#define K1SIZE 0x0000001000000000 /* 2^^36 */
135#define K2SIZE 0x000000ff80000000
136#define KSEGSIZE 0x000000ff80000000 /* max syssegsz */
137#define TO_PHYS_MASK 0x0000000fffffffff /* 2^^36 - 1 */
138#endif
139
140#if defined (CONFIG_CPU_R8000)
141/* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
142#define KUSIZE 0x0000010000000000 /* 2^^40 */
143#define KUSIZE_64 0x0000010000000000 /* 2^^40 */
144#define K0SIZE 0x0000010000000000 /* 2^^40 */
145#define K1SIZE 0x0000010000000000 /* 2^^40 */
146#define K2SIZE 0x0001000000000000
147#define KSEGSIZE 0x0000010000000000 /* max syssegsz */
148#define TO_PHYS_MASK 0x000000ffffffffff /* 2^^40 - 1 */
149#endif
150
151#if defined (CONFIG_CPU_R10000)
152#define KUSIZE 0x0000010000000000 /* 2^^40 */
153#define KUSIZE_64 0x0000010000000000 /* 2^^40 */
154#define K0SIZE 0x0000010000000000 /* 2^^40 */
155#define K1SIZE 0x0000010000000000 /* 2^^40 */
156#define K2SIZE 0x00000fff80000000
157#define KSEGSIZE 0x00000fff80000000 /* max syssegsz */
158#define TO_PHYS_MASK 0x000000ffffffffff /* 2^^40 - 1 */
159#endif
160
161/*
162 * Further names for SGI source compatibility. These are stolen from
163 * IRIX's <sys/mips_addrspace.h>.
164 */
165#define KUBASE 0
166#define KUSIZE_32 0x0000000080000000 /* KUSIZE
167 for a 32 bit proc */
168#define K0BASE_EXL_WR 0xa800000000000000 /* exclusive on write */
169#define K0BASE_NONCOH 0x9800000000000000 /* noncoherent */
170#define K0BASE_EXL 0xa000000000000000 /* exclusive */
171
172#ifndef CONFIG_CPU_R8000
173
174/*
175 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
176 * in order to catch bugs in the source code.
177 */
178
179#define COMPAT_K1BASE32 0xffffffffa0000000
180#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
181
182#endif
183
184#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
185#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
186
187#endif /* _ASM_ADDRSPACE_H */