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 by Ralf Baechle
7 * Copyright (C) 2000, 2002 Maciej W. Rozycki
9 * Definitions for the address spaces of the MIPS CPUs.
11 #ifndef __ASM_MIPS_ADDRSPACE_H
12 #define __ASM_MIPS_ADDRSPACE_H
22 #define _ATYPE_ __PTRDIFF_TYPE__
24 #define _ATYPE64_ long long
28 * 32-bit MIPS address spaces
34 #define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
35 #define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
39 * Memory segments (32bit kernel mode addresses)
41 #define KUSEG 0x00000000
42 #define KSEG0 0x80000000
43 #define KSEG1 0xa0000000
44 #define KSEG2 0xc0000000
45 #define KSEG3 0xe0000000
50 * Returns the kernel segment base of a given address
52 #define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000)
55 * Returns the physical address of a KSEG0/KSEG1 address
57 #define CPHYSADDR(a) ((_ACAST32_ (a)) & 0x1fffffff)
60 #define PHYSADDR(a) CPHYSADDR(a)
64 * Map an address to a certain kernel segment
66 #define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0)
67 #define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1)
68 #define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2)
69 #define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3)
72 * Memory segments (64bit kernel mode addresses)
74 #define XKUSEG 0x0000000000000000
75 #define XKSSEG 0x4000000000000000
76 #define XKPHYS 0x8000000000000000
77 #define XKSEG 0xc000000000000000
78 #define CKSEG0 0xffffffff80000000
79 #define CKSEG1 0xffffffffa0000000
80 #define CKSSEG 0xffffffffc0000000
81 #define CKSEG3 0xffffffffe0000000
84 * Cache modes for XKPHYS address conversion macros
86 #define K_CALG_COH_EXCL1_NOL2 0
87 #define K_CALG_COH_SHRL1_NOL2 1
88 #define K_CALG_UNCACHED 2
89 #define K_CALG_NONCOHERENT 3
90 #define K_CALG_COH_EXCL 4
91 #define K_CALG_COH_SHAREABLE 5
92 #define K_CALG_NOTUSED 6
93 #define K_CALG_UNCACHED_ACCEL 7
95 #define TO_PHYS_MASK 0xfffffffffULL /* 36 bit */
98 * 64-bit address conversions
100 #define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
101 #define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
102 #define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK)
103 #define PHYS_TO_XKPHYS(cm,a) (0x8000000000000000 | ((cm)<<59) | (a))
105 #endif /* __ASM_MIPS_ADDRSPACE_H */