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 */ 145