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 * Gives the size of each kernel segment 52 */ 53#define CSEGX_SIZE 0x20000000 54 55/* 56 * Returns the physical address of a CKSEGx / XKPHYS address 57 */ 58#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff) 59#define XPHYSADDR(a) ((_ACAST64_(a)) & \ 60 _CONST64_(0x0000ffffffffffff)) 61 62#ifdef CONFIG_64BIT 63 64/* 65 * Memory segments (64bit kernel mode addresses) 66 * The compatibility segments use the full 64-bit sign extended value. Note 67 * the R8000 doesn't have them so don't reference these in generic MIPS code. 68 */ 69#define XKUSEG _CONST64_(0x0000000000000000) 70#define XKSSEG _CONST64_(0x4000000000000000) 71#define XKPHYS _CONST64_(0x8000000000000000) 72#define XKSEG _CONST64_(0xc000000000000000) 73#define CKSEG0 _CONST64_(0xffffffff80000000) 74#define CKSEG1 _CONST64_(0xffffffffa0000000) 75#define CKSSEG _CONST64_(0xffffffffc0000000) 76#define CKSEG3 _CONST64_(0xffffffffe0000000) 77 78#define CKSEG0ADDR(a) (CPHYSADDR(a) | CKSEG0) 79#define CKSEG1ADDR(a) (CPHYSADDR(a) | CKSEG1) 80#define CKSEG2ADDR(a) (CPHYSADDR(a) | CKSEG2) 81#define CKSEG3ADDR(a) (CPHYSADDR(a) | CKSEG3) 82 83#else 84 85#define CKSEG0ADDR(a) (CPHYSADDR(a) | KSEG0) 86#define CKSEG1ADDR(a) (CPHYSADDR(a) | KSEG1) 87#define CKSEG2ADDR(a) (CPHYSADDR(a) | KSEG2) 88#define CKSEG3ADDR(a) (CPHYSADDR(a) | KSEG3) 89 90/* 91 * Map an address to a certain kernel segment 92 */ 93#define KSEG0ADDR(a) (CPHYSADDR(a) | KSEG0) 94#define KSEG1ADDR(a) (CPHYSADDR(a) | KSEG1) 95#define KSEG2ADDR(a) (CPHYSADDR(a) | KSEG2) 96#define KSEG3ADDR(a) (CPHYSADDR(a) | KSEG3) 97 98/* 99 * Memory segments (32bit kernel mode addresses) 100 * These are the traditional names used in the 32-bit universe. 101 */ 102#define KUSEG 0x00000000 103#define KSEG0 0x80000000 104#define KSEG1 0xa0000000 105#define KSEG2 0xc0000000 106#define KSEG3 0xe0000000 107 108#define CKUSEG 0x00000000 109#define CKSEG0 0x80000000 110#define CKSEG1 0xa0000000 111#define CKSEG2 0xc0000000 112#define CKSEG3 0xe0000000 113 114#endif 115 116/* 117 * Cache modes for XKPHYS address conversion macros 118 */ 119#define K_CALG_COH_EXCL1_NOL2 0 120#define K_CALG_COH_SHRL1_NOL2 1 121#define K_CALG_UNCACHED 2 122#define K_CALG_NONCOHERENT 3 123#define K_CALG_COH_EXCL 4 124#define K_CALG_COH_SHAREABLE 5 125#define K_CALG_NOTUSED 6 126#define K_CALG_UNCACHED_ACCEL 7 127 128/* 129 * 64-bit address conversions 130 */ 131#define PHYS_TO_XKSEG_UNCACHED(p) PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p)) 132#define PHYS_TO_XKSEG_CACHED(p) PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p)) 133#define XKPHYS_TO_PHYS(p) ((p) & TO_PHYS_MASK) 134#define PHYS_TO_XKPHYS(cm, a) (XKPHYS | (_ACAST64_(cm) << 59) | (a)) 135 136/* 137 * The ultimate limited of the 64-bit MIPS architecture: 2 bits for selecting 138 * the region, 3 bits for the CCA mode. This leaves 59 bits of which the 139 * R8000 implements most with its 48-bit physical address space. 140 */ 141#define TO_PHYS_MASK _CONST64_(0x07ffffffffffffff) /* 2^^59 - 1 */ 142 143#define COMPAT_K1BASE32 _CONST64_(0xffffffffa0000000) 144#define PHYS_TO_COMPATK1(x) ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */ 145 146#define KDM_TO_PHYS(x) (_ACAST64_ (x) & TO_PHYS_MASK) 147#define PHYS_TO_K0(x) (_ACAST64_ (x) | CAC_BASE) 148 149#endif /* _ASM_ADDRSPACE_H */ 150