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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <spaces.h>
14
15/*
16 * Configure language
17 */
18#ifdef __ASSEMBLY__
19#define _ATYPE_
20#define _ATYPE32_
21#define _ATYPE64_
Atsushi Nemoto4e3884f2006-10-21 01:28:26 +090022#define _CONST64_(x) x
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#else
24#define _ATYPE_ __PTRDIFF_TYPE__
25#define _ATYPE32_ int
Atsushi Nemoto4e3884f2006-10-21 01:28:26 +090026#define _ATYPE64_ __s64
27#ifdef CONFIG_64BIT
28#define _CONST64_(x) x ## L
29#else
30#define _CONST64_(x) x ## LL
31#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#endif
33
34/*
35 * 32-bit MIPS address spaces
36 */
37#ifdef __ASSEMBLY__
38#define _ACAST32_
39#define _ACAST64_
40#else
41#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
42#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
43#endif
44
45/*
46 * Returns the kernel segment base of a given address
47 */
48#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
49
50/*
51 * Returns the physical address of a CKSEGx / XKPHYS address
52 */
Maciej W. Rozycki7d7ee222005-06-30 16:10:04 +000053#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
54#define XPHYSADDR(a) ((_ACAST64_(a)) & \
Atsushi Nemoto4e3884f2006-10-21 01:28:26 +090055 _CONST64_(0x000000ffffffffff))
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Ralf Baechle875d43e2005-09-03 15:56:16 -070057#ifdef CONFIG_64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59/*
60 * Memory segments (64bit kernel mode addresses)
61 * The compatibility segments use the full 64-bit sign extended value. Note
62 * the R8000 doesn't have them so don't reference these in generic MIPS code.
63 */
Atsushi Nemoto4e3884f2006-10-21 01:28:26 +090064#define XKUSEG _CONST64_(0x0000000000000000)
65#define XKSSEG _CONST64_(0x4000000000000000)
66#define XKPHYS _CONST64_(0x8000000000000000)
67#define XKSEG _CONST64_(0xc000000000000000)
68#define CKSEG0 _CONST64_(0xffffffff80000000)
69#define CKSEG1 _CONST64_(0xffffffffa0000000)
70#define CKSSEG _CONST64_(0xffffffffc0000000)
71#define CKSEG3 _CONST64_(0xffffffffe0000000)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
74#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
75#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
76#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
77
78#else
79
80#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
81#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
82#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
83#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
84
85/*
86 * Map an address to a certain kernel segment
87 */
88#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
89#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
90#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
91#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
92
93/*
94 * Memory segments (32bit kernel mode addresses)
95 * These are the traditional names used in the 32-bit universe.
96 */
97#define KUSEG 0x00000000
98#define KSEG0 0x80000000
99#define KSEG1 0xa0000000
100#define KSEG2 0xc0000000
101#define KSEG3 0xe0000000
102
103#define CKUSEG 0x00000000
104#define CKSEG0 0x80000000
105#define CKSEG1 0xa0000000
106#define CKSEG2 0xc0000000
107#define CKSEG3 0xe0000000
108
109#endif
110
111/*
112 * Cache modes for XKPHYS address conversion macros
113 */
114#define K_CALG_COH_EXCL1_NOL2 0
115#define K_CALG_COH_SHRL1_NOL2 1
116#define K_CALG_UNCACHED 2
117#define K_CALG_NONCOHERENT 3
118#define K_CALG_COH_EXCL 4
119#define K_CALG_COH_SHAREABLE 5
120#define K_CALG_NOTUSED 6
121#define K_CALG_UNCACHED_ACCEL 7
122
123/*
124 * 64-bit address conversions
125 */
Ralf Baechle21a151d2007-10-11 23:46:15 +0100126#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p))
127#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
Ralf Baechle21a151d2007-10-11 23:46:15 +0100129#define PHYS_TO_XKPHYS(cm, a) (_CONST64_(0x8000000000000000) | \
Maciej W. Rozycki7d7ee222005-06-30 16:10:04 +0000130 ((cm)<<59) | (a))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Ralf Baechle8bb809d2007-07-10 17:32:56 +0100132/*
133 * The ultimate limited of the 64-bit MIPS architecture: 2 bits for selecting
134 * the region, 3 bits for the CCA mode. This leaves 59 bits of which the
135 * R8000 implements most with its 48-bit physical address space.
136 */
137#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */
Ralf Baechle5090dfb2005-10-01 17:34:35 +0100138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139#ifndef CONFIG_CPU_R8000
140
141/*
142 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
143 * in order to catch bugs in the source code.
144 */
145
Atsushi Nemoto4e3884f2006-10-21 01:28:26 +0900146#define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
148
149#endif
150
151#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
152#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
153
154#endif /* _ASM_ADDRSPACE_H */