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
13 #include <linux/config.h>
23 #define _LLCONST_(x) x
25 #define _ATYPE_ __PTRDIFF_TYPE__
27 #define _ATYPE64_ long long
28 #define _LLCONST_(x) x ## LL
32 * 32-bit MIPS address spaces
38 #define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
39 #define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
43 * Returns the kernel segment base of a given address
45 #define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
48 * Returns the physical address of a CKSEGx / XKPHYS address
50 #define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
51 #define XPHYSADDR(a) ((_ACAST64_(a)) & \
52 _LLCONST_(0x000000ffffffffff))
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.
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)
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)
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)
83 * Map an address to a certain kernel segment
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)
91 * Memory segments (32bit kernel mode addresses)
92 * These are the traditional names used in the 32-bit universe.
94 #define KUSEG 0x00000000
95 #define KSEG0 0x80000000
96 #define KSEG1 0xa0000000
97 #define KSEG2 0xc0000000
98 #define KSEG3 0xe0000000
100 #define CKUSEG 0x00000000
101 #define CKSEG0 0x80000000
102 #define CKSEG1 0xa0000000
103 #define CKSEG2 0xc0000000
104 #define CKSEG3 0xe0000000
109 * Cache modes for XKPHYS address conversion macros
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
121 * 64-bit address conversions
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) | \
129 #if defined (CONFIG_CPU_R4300) \
130 || defined (CONFIG_CPU_R4X00) \
131 || defined (CONFIG_CPU_R5000) \
132 || defined (CONFIG_CPU_RM7000) \
133 || defined (CONFIG_CPU_NEVADA) \
134 || defined (CONFIG_CPU_TX49XX) \
135 || defined (CONFIG_CPU_MIPS64)
136 #define TO_PHYS_MASK _LLCONST_(0x0000000fffffffff) /* 2^^36 - 1 */
139 #if defined (CONFIG_CPU_R8000)
140 /* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
141 #define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
144 #if defined (CONFIG_CPU_R10000)
145 #define TO_PHYS_MASK _LLCONST_(0x000000ffffffffff) /* 2^^40 - 1 */
148 #if defined(CONFIG_CPU_SB1) || defined(CONFIG_CPU_SB1A)
149 #define TO_PHYS_MASK _LLCONST_(0x00000fffffffffff) /* 2^^44 - 1 */
152 #ifndef CONFIG_CPU_R8000
155 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
156 * in order to catch bugs in the source code.
159 #define COMPAT_K1BASE32 _LLCONST_(0xffffffffa0000000)
160 #define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
164 #define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
165 #define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
167 #endif /* _ASM_ADDRSPACE_H */