include/asm-mips/addrspace.h

   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 _LLCONST_(x)    x
  23 #else
  24 #define _ATYPE_         __PTRDIFF_TYPE__
  25 #define _ATYPE32_       int
  26 #define _ATYPE64_       long long
  27 #define _LLCONST_(x)    x ## LL
  28 #endif
  29
  30 /*
  31  *  32-bit MIPS address spaces
  32  */
  33 #ifdef __ASSEMBLY__
  34 #define _ACAST32_
  35 #define _ACAST64_
  36 #else
  37 #define _ACAST32_               (_ATYPE_)(_ATYPE32_)    /* widen if necessary */
  38 #define _ACAST64_               (_ATYPE64_)             /* do _not_ narrow */
  39 #endif
  40
  41 /*
  42  * Returns the kernel segment base of a given address
  43  */
  44 #define KSEGX(a)                ((_ACAST32_ (a)) & 0xe0000000)
  45
  46 /*
  47  * Returns the physical address of a CKSEGx / XKPHYS address
  48  */
  49 #define CPHYSADDR(a)            ((_ACAST32_(a)) & 0x1fffffff)
  50 #define XPHYSADDR(a)            ((_ACAST64_(a)) &                       \
  51                                  _LLCONST_(0x000000ffffffffff))
  52
  53 #ifdef CONFIG_64BIT
  54
  55 /*
  56  * Memory segments (64bit kernel mode addresses)
  57  * The compatibility segments use the full 64-bit sign extended value.  Note
  58  * the R8000 doesn't have them so don't reference these in generic MIPS code.
  59  */
  60 #define XKUSEG                  _LLCONST_(0x0000000000000000)
  61 #define XKSSEG                  _LLCONST_(0x4000000000000000)
  62 #define XKPHYS                  _LLCONST_(0x8000000000000000)
  63 #define XKSEG                   _LLCONST_(0xc000000000000000)
  64 #define CKSEG0                  _LLCONST_(0xffffffff80000000)
  65 #define CKSEG1                  _LLCONST_(0xffffffffa0000000)
  66 #define CKSSEG                  _LLCONST_(0xffffffffc0000000)
  67 #define CKSEG3                  _LLCONST_(0xffffffffe0000000)
  68
  69 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | CKSEG0)
  70 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | CKSEG1)
  71 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | CKSEG2)
  72 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | CKSEG3)
  73
  74 #else
  75
  76 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | KSEG0)
  77 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | KSEG1)
  78 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | KSEG2)
  79 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | KSEG3)
  80
  81 /*
  82  * Map an address to a certain kernel segment
  83  */
  84 #define KSEG0ADDR(a)            (CPHYSADDR(a) | KSEG0)
  85 #define KSEG1ADDR(a)            (CPHYSADDR(a) | KSEG1)
  86 #define KSEG2ADDR(a)            (CPHYSADDR(a) | KSEG2)
  87 #define KSEG3ADDR(a)            (CPHYSADDR(a) | KSEG3)
  88
  89 /*
  90  * Memory segments (32bit kernel mode addresses)
  91  * These are the traditional names used in the 32-bit universe.
  92  */
  93 #define KUSEG                   0x00000000
  94 #define KSEG0                   0x80000000
  95 #define KSEG1                   0xa0000000
  96 #define KSEG2                   0xc0000000
  97 #define KSEG3                   0xe0000000
  98
  99 #define CKUSEG                  0x00000000
 100 #define CKSEG0                  0x80000000
 101 #define CKSEG1                  0xa0000000
 102 #define CKSEG2                  0xc0000000
 103 #define CKSEG3                  0xe0000000
 104
 105 #endif
 106
 107 /*
 108  * Cache modes for XKPHYS address conversion macros
 109  */
 110 #define K_CALG_COH_EXCL1_NOL2   0
 111 #define K_CALG_COH_SHRL1_NOL2   1
 112 #define K_CALG_UNCACHED         2
 113 #define K_CALG_NONCOHERENT      3
 114 #define K_CALG_COH_EXCL         4
 115 #define K_CALG_COH_SHAREABLE    5
 116 #define K_CALG_NOTUSED          6
 117 #define K_CALG_UNCACHED_ACCEL   7
 118
 119 /*
 120  * 64-bit address conversions
 121  */
 122 #define PHYS_TO_XKSEG_UNCACHED(p)       PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
 123 #define PHYS_TO_XKSEG_CACHED(p)         PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
 124 #define XKPHYS_TO_PHYS(p)               ((p) & TO_PHYS_MASK)
 125 #define PHYS_TO_XKPHYS(cm,a)            (_LLCONST_(0x8000000000000000) | \
 126                                          ((cm)<<59) | (a))
 127
 128 #if defined (CONFIG_CPU_R4300)                                          \
 129     || defined (CONFIG_CPU_R4X00)                                       \
 130     || defined (CONFIG_CPU_R5000)                                       \
 131     || defined (CONFIG_CPU_RM7000)                                      \
 132     || defined (CONFIG_CPU_NEVADA)                                      \
 133     || defined (CONFIG_CPU_TX49XX)                                      \
 134     || defined (CONFIG_CPU_MIPS64)
 135 #define TO_PHYS_MASK    _LLCONST_(0x0000000fffffffff)   /* 2^^36 - 1 */
 136 #endif
 137
 138 #if defined (CONFIG_CPU_R8000)
 139 /* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
 140 #define TO_PHYS_MASK    _LLCONST_(0x000000ffffffffff)   /* 2^^40 - 1 */
 141 #endif
 142
 143 #if defined (CONFIG_CPU_R10000)
 144 #define TO_PHYS_MASK    _LLCONST_(0x000000ffffffffff)   /* 2^^40 - 1 */
 145 #endif
 146
 147 #if defined(CONFIG_CPU_SB1) || defined(CONFIG_CPU_SB1A)
 148 #define TO_PHYS_MASK    _LLCONST_(0x00000fffffffffff)   /* 2^^44 - 1 */
 149 #endif
 150
 151 #ifndef CONFIG_CPU_R8000
 152
 153 /*
 154  * The R8000 doesn't have the 32-bit compat spaces so we don't define them
 155  * in order to catch bugs in the source code.
 156  */
 157
 158 #define COMPAT_K1BASE32         _LLCONST_(0xffffffffa0000000)
 159 #define PHYS_TO_COMPATK1(x)     ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
 160
 161 #endif
 162
 163 #define KDM_TO_PHYS(x)          (_ACAST64_ (x) & TO_PHYS_MASK)
 164 #define PHYS_TO_K0(x)           (_ACAST64_ (x) | CAC_BASE)
 165
 166 #endif /* _ASM_ADDRSPACE_H */