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
20 #define _CONST64_(x) x
22 #define _ATYPE_ __PTRDIFF_TYPE__
24 #define _ATYPE64_ __s64
26 #define _CONST64_(x) x ## L
28 #define _CONST64_(x) x ## LL
33 * 32-bit MIPS address spaces
39 #define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
40 #define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
44 * Returns the kernel segment base of a given address
46 #define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
49 * Returns the physical address of a CKSEGx / XKPHYS address
51 #define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)
52 #define XPHYSADDR(a) ((_ACAST64_(a)) & \
53 _CONST64_(0x000000ffffffffff))
58 * Memory segments (64bit kernel mode addresses)
59 * The compatibility segments use the full 64-bit sign extended value. Note
60 * the R8000 doesn't have them so don't reference these in generic MIPS code.
62 #define XKUSEG _CONST64_(0x0000000000000000)
63 #define XKSSEG _CONST64_(0x4000000000000000)
64 #define XKPHYS _CONST64_(0x8000000000000000)
65 #define XKSEG _CONST64_(0xc000000000000000)
66 #define CKSEG0 _CONST64_(0xffffffff80000000)
67 #define CKSEG1 _CONST64_(0xffffffffa0000000)
68 #define CKSSEG _CONST64_(0xffffffffc0000000)
69 #define CKSEG3 _CONST64_(0xffffffffe0000000)
71 #define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0)
72 #define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1)
73 #define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2)
74 #define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3)
78 #define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
79 #define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
80 #define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
81 #define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
84 * Map an address to a certain kernel segment
86 #define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
87 #define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
88 #define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
89 #define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
92 * Memory segments (32bit kernel mode addresses)
93 * These are the traditional names used in the 32-bit universe.
95 #define KUSEG 0x00000000
96 #define KSEG0 0x80000000
97 #define KSEG1 0xa0000000
98 #define KSEG2 0xc0000000
99 #define KSEG3 0xe0000000
101 #define CKUSEG 0x00000000
102 #define CKSEG0 0x80000000
103 #define CKSEG1 0xa0000000
104 #define CKSEG2 0xc0000000
105 #define CKSEG3 0xe0000000
110 * Cache modes for XKPHYS address conversion macros
112 #define K_CALG_COH_EXCL1_NOL2 0
113 #define K_CALG_COH_SHRL1_NOL2 1
114 #define K_CALG_UNCACHED 2
115 #define K_CALG_NONCOHERENT 3
116 #define K_CALG_COH_EXCL 4
117 #define K_CALG_COH_SHAREABLE 5
118 #define K_CALG_NOTUSED 6
119 #define K_CALG_UNCACHED_ACCEL 7
122 * 64-bit address conversions
124 #define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p))
125 #define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
126 #define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
127 #define PHYS_TO_XKPHYS(cm, a) (_CONST64_(0x8000000000000000) | \
128 (_CONST64_(cm) << 59) | (a))
131 * Returns the uncached address of a sdram address
134 #if defined(CONFIG_SOC_AU1X00) || defined(CONFIG_TB0229)
135 /* We use a 36 bit physical address map here and
136 cannot access physical memory directly from core */
137 #define UNCACHED_SDRAM(a) (((unsigned long)(a)) | 0x20000000)
138 #else /* !CONFIG_SOC_AU1X00 */
139 #define UNCACHED_SDRAM(a) KSEG1ADDR(a)
140 #endif /* CONFIG_SOC_AU1X00 */
141 #endif /* __ASSEMBLY__ */
144 * The ultimate limited of the 64-bit MIPS architecture: 2 bits for selecting
145 * the region, 3 bits for the CCA mode. This leaves 59 bits of which the
146 * R8000 implements most with its 48-bit physical address space.
148 #define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */
150 #ifndef CONFIG_CPU_R8000
153 * The R8000 doesn't have the 32-bit compat spaces so we don't define them
154 * in order to catch bugs in the source code.
157 #define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000)
158 #define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
162 #define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK)
163 #define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE)
165 #endif /* _ASM_ADDRSPACE_H */