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#define _LLCONST_(x) x
24#else
25#define _ATYPE_ __PTRDIFF_TYPE__
26#define _ATYPE32_ int
27#define _ATYPE64_ long long
28#define _LLCONST_(x) x ## LL
29#endif
30
31/*
32 * 32-bit MIPS address spaces
33 */
34#ifdef __ASSEMBLY__
35#define _ACAST32_
36#define _ACAST64_
37#else
38#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
39#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
40#endif
41
42/*
43 * Returns the kernel segment base of a given address
44 */
45#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
46
47/*
48 * Returns the physical address of a CKSEGx / XKPHYS address
49 */
50#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
51#define XPHYSADDR(a) ((_ACAST64_(a)) & \
52 _LLCONST_(0x000000ffffffffff))
53
54#ifdef CONFIG_64BIT
55
56/*
57 * Memory segments (64bit kernel mode addresses)
58 * The compatibility segments use the full 64-bit sign extended value. Note
59 * the R8000 doesn't have them so don't reference these in generic MIPS code.
60 */
61#define XKUSEG _LLCONST_(0x0000000000000000)
62#define XKSSEG _LLCONST_(0x4000000000000000)
63#define XKPHYS _LLCONST_(0x8000000000000000)
64#define XKSEG _LLCONST_(0xc000000000000000)
65#define CKSEG0 _LLCONST_(0xffffffff80000000)
66#define CKSEG1 _LLCONST_(0xffffffffa0000000)
67#define CKSSEG _LLCONST_(0xffffffffc0000000)
68#define CKSEG3 _LLCONST_(0xffffffffe0000000)
69
70#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
71#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
72#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
73#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
74
75#else
76
77#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
78#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
79#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
80#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
81
82/*
83 * Map an address to a certain kernel segment
84 */
85#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
86#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
87#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
88#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
89
90/*
91 * Memory segments (32bit kernel mode addresses)
92 * These are the traditional names used in the 32-bit universe.
93 */
94#define KUSEG 0x00000000
95#define KSEG0 0x80000000
96#define KSEG1 0xa0000000
97#define KSEG2 0xc0000000
98#define KSEG3 0xe0000000
99
100#define CKUSEG 0x00000000
101#define CKSEG0 0x80000000
102#define CKSEG1 0xa0000000
103#define CKSEG2 0xc0000000
104#define CKSEG3 0xe0000000
105
106#endif
107
108/*
109 * Cache modes for XKPHYS address conversion macros
110 */
111#define K_CALG_COH_EXCL1_NOL2 0
112#define K_CALG_COH_SHRL1_NOL2 1
113#define K_CALG_UNCACHED 2
114#define K_CALG_NONCOHERENT 3
115#define K_CALG_COH_EXCL 4
116#define K_CALG_COH_SHAREABLE 5
117#define K_CALG_NOTUSED 6
118#define K_CALG_UNCACHED_ACCEL 7
119
120/*
121 * 64-bit address conversions
122 */
123#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
124#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
125#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
126#define PHYS_TO_XKPHYS(cm,a) (_LLCONST_(0x8000000000000000) | \
127 ((cm)<<59) | (a))
128
129#if defined (CONFIG_CPU_R4300) \
130 || defined (CONFIG_CPU_R4X00) \
131 || defined (CONFIG_CPU_R5000) \
132 || defined (CONFIG_CPU_NEVADA) \
133 || defined (CONFIG_CPU_TX49XX) \
134 || defined (CONFIG_CPU_MIPS64)
135#define KUSIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
136#define KUSIZE_64 _LLCONST_(0x0000010000000000) /* 2^^40 */
137#define K0SIZE _LLCONST_(0x0000001000000000) /* 2^^36 */
138#define K1SIZE _LLCONST_(0x0000001000000000) /* 2^^36 */
139#define K2SIZE _LLCONST_(0x000000ff80000000)
140#define KSEGSIZE _LLCONST_(0x000000ff80000000) /* max syssegsz */
141#define TO_PHYS_MASK _LLCONST_(0x0000000fffffffff) /* 2^^36 - 1 */
142#endif
143
144#if defined (CONFIG_CPU_R8000)
145/* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
146#define KUSIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
147#define KUSIZE_64 _LLCONST_(0x0000010000000000) /* 2^^40 */
148#define K0SIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
149#define K1SIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
150#define K2SIZE _LLCONST_(0x0001000000000000)
151#define KSEGSIZE _LLCONST_(0x0000010000000000) /* max syssegsz */
152#define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
153#endif
154
155#if defined (CONFIG_CPU_R10000)
156#define KUSIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
157#define KUSIZE_64 _LLCONST_(0x0000010000000000) /* 2^^40 */
158#define K0SIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
159#define K1SIZE _LLCONST_(0x0000010000000000) /* 2^^40 */
160#define K2SIZE _LLCONST_(0x00000fff80000000)
161#define KSEGSIZE _LLCONST_(0x00000fff80000000) /* max syssegsz */
162#define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
163#endif
164
165#if defined(CONFIG_CPU_SB1) || defined(CONFIG_CPU_SB1A)
166#define KUSIZE _LLCONST_(0x0000100000000000) /* 2^^44 */
167#define KUSIZE_64 _LLCONST_(0x0000100000000000) /* 2^^44 */
168#define K0SIZE _LLCONST_(0x0000100000000000) /* 2^^44 */
169#define K1SIZE _LLCONST_(0x0000100000000000) /* 2^^44 */
170#define K2SIZE _LLCONST_(0x0000ffff80000000)
171#define KSEGSIZE _LLCONST_(0x0000ffff80000000) /* max syssegsz */
172#define TO_PHYS_MASK _LLCONST_(0x00000fffffffffff) /* 2^^44 - 1 */
173#endif
174
175/*
176 * Further names for SGI source compatibility. These are stolen from
177 * IRIX's <sys/mips_addrspace.h>.
178 */
179#define KUBASE _LLCONST_(0)
180#define KUSIZE_32 _LLCONST_(0x0000000080000000) /* KUSIZE
181 for a 32 bit proc */
182#define K0BASE_EXL_WR _LLCONST_(0xa800000000000000) /* exclusive on write */
183#define K0BASE_NONCOH _LLCONST_(0x9800000000000000) /* noncoherent */
184#define K0BASE_EXL _LLCONST_(0xa000000000000000) /* exclusive */
185
186#ifndef CONFIG_CPU_R8000
187
188/*
189 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
190 * in order to catch bugs in the source code.
191 */
192
193#define COMPAT_K1BASE32 _LLCONST_(0xffffffffa0000000)
194#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
195
196#endif
197
198#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
199#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
200
201#endif /* _ASM_ADDRSPACE_H */