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 <linux/config.h>
  14 #include <spaces.h>
  15
  16 /*
  17  *  Configure language
  18  */
  19 #ifdef __ASSEMBLY__
  20 #define _ATYPE_
  21 #define _ATYPE32_
  22 #define _ATYPE64_
  23 #else
  24 #define _ATYPE_         __PTRDIFF_TYPE__
  25 #define _ATYPE32_       int
  26 #define _ATYPE64_       long long
  27 #endif
  28
  29 /*
  30  *  32-bit MIPS address spaces
  31  */
  32 #ifdef __ASSEMBLY__
  33 #define _ACAST32_
  34 #define _ACAST64_
  35 #else
  36 #define _ACAST32_               (_ATYPE_)(_ATYPE32_)    /* widen if necessary */
  37 #define _ACAST64_               (_ATYPE64_)             /* do _not_ narrow */
  38 #endif
  39
  40 /*
  41  * Returns the kernel segment base of a given address
  42  */
  43 #define KSEGX(a)                ((_ACAST32_ (a)) & 0xe0000000)
  44
  45 /*
  46  * Returns the physical address of a CKSEGx / XKPHYS address
  47  */
  48 #define CPHYSADDR(a)            ((_ACAST32_ (a)) & 0x1fffffff)
  49 #define XPHYSADDR(a)            ((_ACAST64_ (a)) & 0x000000ffffffffff)
  50
  51 #ifdef CONFIG_MIPS64
  52
  53 /*
  54  * Memory segments (64bit kernel mode addresses)
  55  * The compatibility segments use the full 64-bit sign extended value.  Note
  56  * the R8000 doesn't have them so don't reference these in generic MIPS code.
  57  */
  58 #define XKUSEG                  0x0000000000000000
  59 #define XKSSEG                  0x4000000000000000
  60 #define XKPHYS                  0x8000000000000000
  61 #define XKSEG                   0xc000000000000000
  62 #define CKSEG0                  0xffffffff80000000
  63 #define CKSEG1                  0xffffffffa0000000
  64 #define CKSSEG                  0xffffffffc0000000
  65 #define CKSEG3                  0xffffffffe0000000
  66
  67 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | CKSEG0)
  68 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | CKSEG1)
  69 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | CKSEG2)
  70 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | CKSEG3)
  71
  72 #else
  73
  74 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | KSEG0)
  75 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | KSEG1)
  76 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | KSEG2)
  77 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | KSEG3)
  78
  79 /*
  80  * Map an address to a certain kernel segment
  81  */
  82 #define KSEG0ADDR(a)            (CPHYSADDR(a) | KSEG0)
  83 #define KSEG1ADDR(a)            (CPHYSADDR(a) | KSEG1)
  84 #define KSEG2ADDR(a)            (CPHYSADDR(a) | KSEG2)
  85 #define KSEG3ADDR(a)            (CPHYSADDR(a) | KSEG3)
  86
  87 /*
  88  * Memory segments (32bit kernel mode addresses)
  89  * These are the traditional names used in the 32-bit universe.
  90  */
  91 #define KUSEG                   0x00000000
  92 #define KSEG0                   0x80000000
  93 #define KSEG1                   0xa0000000
  94 #define KSEG2                   0xc0000000
  95 #define KSEG3                   0xe0000000
  96
  97 #define CKUSEG                  0x00000000
  98 #define CKSEG0                  0x80000000
  99 #define CKSEG1                  0xa0000000
 100 #define CKSEG2                  0xc0000000
 101 #define CKSEG3                  0xe0000000
 102
 103 #endif
 104
 105 /*
 106  * Cache modes for XKPHYS address conversion macros
 107  */
 108 #define K_CALG_COH_EXCL1_NOL2   0
 109 #define K_CALG_COH_SHRL1_NOL2   1
 110 #define K_CALG_UNCACHED         2
 111 #define K_CALG_NONCOHERENT      3
 112 #define K_CALG_COH_EXCL         4
 113 #define K_CALG_COH_SHAREABLE    5
 114 #define K_CALG_NOTUSED          6
 115 #define K_CALG_UNCACHED_ACCEL   7
 116
 117 /*
 118  * 64-bit address conversions
 119  */
 120 #define PHYS_TO_XKSEG_UNCACHED(p)       PHYS_TO_XKPHYS(K_CALG_UNCACHED,(p))
 121 #define PHYS_TO_XKSEG_CACHED(p)         PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE,(p))
 122 #define XKPHYS_TO_PHYS(p)               ((p) & TO_PHYS_MASK)
 123 #define PHYS_TO_XKPHYS(cm,a)            (0x8000000000000000 | ((cm)<<59) | (a))
 124
 125 #if defined (CONFIG_CPU_R4300)                                          \
 126     || defined (CONFIG_CPU_R4X00)                                       \
 127     || defined (CONFIG_CPU_R5000)                                       \
 128     || defined (CONFIG_CPU_NEVADA)                                      \
 129     || defined (CONFIG_CPU_TX49XX)                                      \
 130     || defined (CONFIG_CPU_MIPS64)
 131 #define KUSIZE                  0x0000010000000000      /* 2^^40 */
 132 #define KUSIZE_64               0x0000010000000000      /* 2^^40 */
 133 #define K0SIZE                  0x0000001000000000      /* 2^^36 */
 134 #define K1SIZE                  0x0000001000000000      /* 2^^36 */
 135 #define K2SIZE                  0x000000ff80000000
 136 #define KSEGSIZE                0x000000ff80000000      /* max syssegsz */
 137 #define TO_PHYS_MASK            0x0000000fffffffff      /* 2^^36 - 1 */
 138 #endif
 139
 140 #if defined (CONFIG_CPU_R8000)
 141 /* We keep KUSIZE consistent with R4000 for now (2^^40) instead of (2^^48) */
 142 #define KUSIZE                  0x0000010000000000      /* 2^^40 */
 143 #define KUSIZE_64               0x0000010000000000      /* 2^^40 */
 144 #define K0SIZE                  0x0000010000000000      /* 2^^40 */
 145 #define K1SIZE                  0x0000010000000000      /* 2^^40 */
 146 #define K2SIZE                  0x0001000000000000
 147 #define KSEGSIZE                0x0000010000000000      /* max syssegsz */
 148 #define TO_PHYS_MASK            0x000000ffffffffff      /* 2^^40 - 1 */
 149 #endif
 150
 151 #if defined (CONFIG_CPU_R10000)
 152 #define KUSIZE                  0x0000010000000000      /* 2^^40 */
 153 #define KUSIZE_64               0x0000010000000000      /* 2^^40 */
 154 #define K0SIZE                  0x0000010000000000      /* 2^^40 */
 155 #define K1SIZE                  0x0000010000000000      /* 2^^40 */
 156 #define K2SIZE                  0x00000fff80000000
 157 #define KSEGSIZE                0x00000fff80000000      /* max syssegsz */
 158 #define TO_PHYS_MASK            0x000000ffffffffff      /* 2^^40 - 1 */
 159 #endif
 160
 161 /*
 162  * Further names for SGI source compatibility.  These are stolen from
 163  * IRIX's <sys/mips_addrspace.h>.
 164  */
 165 #define KUBASE                  0
 166 #define KUSIZE_32               0x0000000080000000      /* KUSIZE
 167                                                            for a 32 bit proc */
 168 #define K0BASE_EXL_WR           0xa800000000000000      /* exclusive on write */
 169 #define K0BASE_NONCOH           0x9800000000000000      /* noncoherent */
 170 #define K0BASE_EXL              0xa000000000000000      /* exclusive */
 171
 172 #ifndef CONFIG_CPU_R8000
 173
 174 /*
 175  * The R8000 doesn't have the 32-bit compat spaces so we don't define them
 176  * in order to catch bugs in the source code.
 177  */
 178
 179 #define COMPAT_K1BASE32         0xffffffffa0000000
 180 #define PHYS_TO_COMPATK1(x)     ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
 181
 182 #endif
 183
 184 #define KDM_TO_PHYS(x)          (_ACAST64_ (x) & TO_PHYS_MASK)
 185 #define PHYS_TO_K0(x)           (_ACAST64_ (x) | CAC_BASE)
 186
 187 #endif /* _ASM_ADDRSPACE_H */