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 * Returns the physical address of a CKSEGx / XKPHYS address
 52 */
 53#define CPHYSADDR(a)		((_ACAST32_(a)) & 0x1fffffff)
 54#define XPHYSADDR(a)		((_ACAST64_(a)) &			\
 55				 _CONST64_(0x0000ffffffffffff))
 56
 57#ifdef CONFIG_64BIT
 58
 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 */
 64#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)
 72
 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 */
126#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))
128#define XKPHYS_TO_PHYS(p)		((p) & TO_PHYS_MASK)
129#define PHYS_TO_XKPHYS(cm, a)		(XKPHYS | (_ACAST64_(cm) << 59) | (a))
130
131/*
132 * The ultimate limited of the 64-bit MIPS architecture:  2 bits for selecting
133 * the region, 3 bits for the CCA mode.  This leaves 59 bits of which the
134 * R8000 implements most with its 48-bit physical address space.
135 */
136#define TO_PHYS_MASK	_CONST64_(0x07ffffffffffffff)	/* 2^^59 - 1 */
137
138#define COMPAT_K1BASE32		_CONST64_(0xffffffffa0000000)
139#define PHYS_TO_COMPATK1(x)	((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
140
141#define KDM_TO_PHYS(x)		(_ACAST64_ (x) & TO_PHYS_MASK)
142#define PHYS_TO_K0(x)		(_ACAST64_ (x) | CAC_BASE)
143
144#endif /* _ASM_ADDRSPACE_H */