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 _CONST64_(x)	x
23#else
24#define _ATYPE_		__PTRDIFF_TYPE__
25#define _ATYPE32_	int
26#define _ATYPE64_	__s64
27#ifdef CONFIG_64BIT
28#define _CONST64_(x)	x ## L
29#else
30#define _CONST64_(x)	x ## LL
31#endif
32#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)) & _ACAST32_(0xe0000000))
49
50/*
51 * Gives the size of each kernel segment
52 */
53#define CSEGX_SIZE		0x20000000
54
55/*
56 * Returns the physical address of a CKSEGx / XKPHYS address
57 */
58#define CPHYSADDR(a)		((_ACAST32_(a)) & 0x1fffffff)
59#define XPHYSADDR(a)		((_ACAST64_(a)) &			\
60				 _CONST64_(0x0000ffffffffffff))
61
62#ifdef CONFIG_64BIT
63
64/*
65 * Memory segments (64bit kernel mode addresses)
66 * The compatibility segments use the full 64-bit sign extended value.  Note
67 * the R8000 doesn't have them so don't reference these in generic MIPS code.
68 */
69#define XKUSEG			_CONST64_(0x0000000000000000)
70#define XKSSEG			_CONST64_(0x4000000000000000)
71#define XKPHYS			_CONST64_(0x8000000000000000)
72#define XKSEG			_CONST64_(0xc000000000000000)
73#define CKSEG0			_CONST64_(0xffffffff80000000)
74#define CKSEG1			_CONST64_(0xffffffffa0000000)
75#define CKSSEG			_CONST64_(0xffffffffc0000000)
76#define CKSEG3			_CONST64_(0xffffffffe0000000)
77
78#define CKSEG0ADDR(a)		(CPHYSADDR(a) | CKSEG0)
79#define CKSEG1ADDR(a)		(CPHYSADDR(a) | CKSEG1)
80#define CKSEG2ADDR(a)		(CPHYSADDR(a) | CKSEG2)
81#define CKSEG3ADDR(a)		(CPHYSADDR(a) | CKSEG3)
82
83#else
84
85#define CKSEG0ADDR(a)		(CPHYSADDR(a) | KSEG0)
86#define CKSEG1ADDR(a)		(CPHYSADDR(a) | KSEG1)
87#define CKSEG2ADDR(a)		(CPHYSADDR(a) | KSEG2)
88#define CKSEG3ADDR(a)		(CPHYSADDR(a) | KSEG3)
89
90/*
91 * Map an address to a certain kernel segment
92 */
93#define KSEG0ADDR(a)		(CPHYSADDR(a) | KSEG0)
94#define KSEG1ADDR(a)		(CPHYSADDR(a) | KSEG1)
95#define KSEG2ADDR(a)		(CPHYSADDR(a) | KSEG2)
96#define KSEG3ADDR(a)		(CPHYSADDR(a) | KSEG3)
97
98/*
99 * Memory segments (32bit kernel mode addresses)
100 * These are the traditional names used in the 32-bit universe.
101 */
102#define KUSEG			0x00000000
103#define KSEG0			0x80000000
104#define KSEG1			0xa0000000
105#define KSEG2			0xc0000000
106#define KSEG3			0xe0000000
107
108#define CKUSEG			0x00000000
109#define CKSEG0			0x80000000
110#define CKSEG1			0xa0000000
111#define CKSEG2			0xc0000000
112#define CKSEG3			0xe0000000
113
114#endif
115
116/*
117 * Cache modes for XKPHYS address conversion macros
118 */
119#define K_CALG_COH_EXCL1_NOL2	0
120#define K_CALG_COH_SHRL1_NOL2	1
121#define K_CALG_UNCACHED		2
122#define K_CALG_NONCOHERENT	3
123#define K_CALG_COH_EXCL		4
124#define K_CALG_COH_SHAREABLE	5
125#define K_CALG_NOTUSED		6
126#define K_CALG_UNCACHED_ACCEL	7
127
128/*
129 * 64-bit address conversions
130 */
131#define PHYS_TO_XKSEG_UNCACHED(p)	PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p))
132#define PHYS_TO_XKSEG_CACHED(p)		PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
133#define XKPHYS_TO_PHYS(p)		((p) & TO_PHYS_MASK)
134#define PHYS_TO_XKPHYS(cm, a)		(XKPHYS | (_ACAST64_(cm) << 59) | (a))
135
136/*
137 * The ultimate limited of the 64-bit MIPS architecture:  2 bits for selecting
138 * the region, 3 bits for the CCA mode.  This leaves 59 bits of which the
139 * R8000 implements most with its 48-bit physical address space.
140 */
141#define TO_PHYS_MASK	_CONST64_(0x07ffffffffffffff)	/* 2^^59 - 1 */
142
143#define COMPAT_K1BASE32		_CONST64_(0xffffffffa0000000)
144#define PHYS_TO_COMPATK1(x)	((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
145
146#define KDM_TO_PHYS(x)		(_ACAST64_ (x) & TO_PHYS_MASK)
147#define PHYS_TO_K0(x)		(_ACAST64_ (x) | CAC_BASE)
148
149#endif /* _ASM_ADDRSPACE_H */
150