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
6 * Copyright (C) 1996, 99 Ralf Baechle
7 * Copyright (C) 2000, 2002 Maciej W. Rozycki
8 * Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
10 #ifndef _ASM_ADDRSPACE_H
11 #define _ASM_ADDRSPACE_H
22 #define _CONST64_(x) x
24 #define _ATYPE_ __PTRDIFF_TYPE__
26 #define _ATYPE64_ __s64
28 #define _CONST64_(x) x ## L
30 #define _CONST64_(x) x ## LL
35 * 32-bit MIPS address spaces
41 #define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
42 #define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
46 * Returns the kernel segment base of a given address
48 #define KSEGX(a) ((_ACAST32_(a)) & _ACAST32_(0xe0000000))
51 * Returns the physical address of a CKSEGx / XKPHYS address
53 #define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
54 #define XPHYSADDR(a) ((_ACAST64_(a)) & \
55 _CONST64_(0x0000ffffffffffff))
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.
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)
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)
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)
86 * Map an address to a certain kernel segment
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)
94 * Memory segments (32bit kernel mode addresses)
95 * These are the traditional names used in the 32-bit universe.
97 #define KUSEG 0x00000000
98 #define KSEG0 0x80000000
99 #define KSEG1 0xa0000000
100 #define KSEG2 0xc0000000
101 #define KSEG3 0xe0000000
103 #define CKUSEG 0x00000000
104 #define CKSEG0 0x80000000
105 #define CKSEG1 0xa0000000
106 #define CKSEG2 0xc0000000
107 #define CKSEG3 0xe0000000
112 * Cache modes for XKPHYS address conversion macros
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
124 * 64-bit address conversions
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))
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.
136 #define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */
138 #define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000)
139 #define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
141 #define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
142 #define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
144 #endif /* _ASM_ADDRSPACE_H */