arch/mips/include/asm/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 /*
  14  *  Configure language
  15  */
  16 #ifdef __ASSEMBLY__
  17 #define _ATYPE_
  18 #define _ATYPE32_
  19 #define _ATYPE64_
  20 #define _CONST64_(x)    x
  21 #else
  22 #define _ATYPE_         __PTRDIFF_TYPE__
  23 #define _ATYPE32_       int
  24 #define _ATYPE64_       __s64
  25 #ifdef CONFIG_64BIT
  26 #define _CONST64_(x)    x ## L
  27 #else
  28 #define _CONST64_(x)    x ## LL
  29 #endif
  30 #endif
  31
  32 /*
  33  *  32-bit MIPS address spaces
  34  */
  35 #ifdef __ASSEMBLY__
  36 #define _ACAST32_
  37 #define _ACAST64_
  38 #else
  39 #define _ACAST32_               (_ATYPE_)(_ATYPE32_)    /* widen if necessary */
  40 #define _ACAST64_               (_ATYPE64_)             /* do _not_ narrow */
  41 #endif
  42
  43 /*
  44  * Returns the kernel segment base of a given address
  45  */
  46 #define KSEGX(a)                ((_ACAST32_ (a)) & 0xe0000000)
  47
  48 /*
  49  * Returns the physical address of a CKSEGx / XKPHYS address
  50  */
  51 #define CPHYSADDR(a)            ((_ACAST32_(a)) & 0x1fffffff)
  52 #define XPHYSADDR(a)            ((_ACAST64_(a)) &                       \
  53                                  _CONST64_(0x000000ffffffffff))
  54
  55 #ifdef CONFIG_64BIT
  56
  57 /*
  58  * Memory segments (64bit kernel mode addresses)
  59  * The compatibility segments use the full 64-bit sign extended value.  Note
  60  * the R8000 doesn't have them so don't reference these in generic MIPS code.
  61  */
  62 #define XKUSEG                  _CONST64_(0x0000000000000000)
  63 #define XKSSEG                  _CONST64_(0x4000000000000000)
  64 #define XKPHYS                  _CONST64_(0x8000000000000000)
  65 #define XKSEG                   _CONST64_(0xc000000000000000)
  66 #define CKSEG0                  _CONST64_(0xffffffff80000000)
  67 #define CKSEG1                  _CONST64_(0xffffffffa0000000)
  68 #define CKSSEG                  _CONST64_(0xffffffffc0000000)
  69 #define CKSEG3                  _CONST64_(0xffffffffe0000000)
  70
  71 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | CKSEG0)
  72 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | CKSEG1)
  73 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | CKSEG2)
  74 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | CKSEG3)
  75
  76 #else
  77
  78 #define CKSEG0ADDR(a)           (CPHYSADDR(a) | KSEG0)
  79 #define CKSEG1ADDR(a)           (CPHYSADDR(a) | KSEG1)
  80 #define CKSEG2ADDR(a)           (CPHYSADDR(a) | KSEG2)
  81 #define CKSEG3ADDR(a)           (CPHYSADDR(a) | KSEG3)
  82
  83 /*
  84  * Map an address to a certain kernel segment
  85  */
  86 #define KSEG0ADDR(a)            (CPHYSADDR(a) | KSEG0)
  87 #define KSEG1ADDR(a)            (CPHYSADDR(a) | KSEG1)
  88 #define KSEG2ADDR(a)            (CPHYSADDR(a) | KSEG2)
  89 #define KSEG3ADDR(a)            (CPHYSADDR(a) | KSEG3)
  90
  91 /*
  92  * Memory segments (32bit kernel mode addresses)
  93  * These are the traditional names used in the 32-bit universe.
  94  */
  95 #define KUSEG                   0x00000000
  96 #define KSEG0                   0x80000000
  97 #define KSEG1                   0xa0000000
  98 #define KSEG2                   0xc0000000
  99 #define KSEG3                   0xe0000000
 100
 101 #define CKUSEG                  0x00000000
 102 #define CKSEG0                  0x80000000
 103 #define CKSEG1                  0xa0000000
 104 #define CKSEG2                  0xc0000000
 105 #define CKSEG3                  0xe0000000
 106
 107 #endif
 108
 109 /*
 110  * Cache modes for XKPHYS address conversion macros
 111  */
 112 #define K_CALG_COH_EXCL1_NOL2   0
 113 #define K_CALG_COH_SHRL1_NOL2   1
 114 #define K_CALG_UNCACHED         2
 115 #define K_CALG_NONCOHERENT      3
 116 #define K_CALG_COH_EXCL         4
 117 #define K_CALG_COH_SHAREABLE    5
 118 #define K_CALG_NOTUSED          6
 119 #define K_CALG_UNCACHED_ACCEL   7
 120
 121 /*
 122  * 64-bit address conversions
 123  */
 124 #define PHYS_TO_XKSEG_UNCACHED(p)       PHYS_TO_XKPHYS(K_CALG_UNCACHED, (p))
 125 #define PHYS_TO_XKSEG_CACHED(p)         PHYS_TO_XKPHYS(K_CALG_COH_SHAREABLE, (p))
 126 #define XKPHYS_TO_PHYS(p)               ((p) & TO_PHYS_MASK)
 127 #define PHYS_TO_XKPHYS(cm, a)           (_CONST64_(0x8000000000000000) | \
 128                                          (_CONST64_(cm) << 59) | (a))
 129
 130 /*
 131  * Returns the uncached address of a sdram address
 132  */
 133 #ifndef __ASSEMBLY__
 134 #if defined(CONFIG_SOC_AU1X00) || defined(CONFIG_TB0229)
 135 /* We use a 36 bit physical address map here and
 136    cannot access physical memory directly from core */
 137 #define UNCACHED_SDRAM(a) (((unsigned long)(a)) | 0x20000000)
 138 #else   /* !CONFIG_SOC_AU1X00 */
 139 #define UNCACHED_SDRAM(a) KSEG1ADDR(a)
 140 #endif  /* CONFIG_SOC_AU1X00 */
 141 #endif  /* __ASSEMBLY__ */
 142
 143 /*
 144  * The ultimate limited of the 64-bit MIPS architecture:  2 bits for selecting
 145  * the region, 3 bits for the CCA mode.  This leaves 59 bits of which the
 146  * R8000 implements most with its 48-bit physical address space.
 147  */
 148 #define TO_PHYS_MASK    _CONST64_(0x07ffffffffffffff)   /* 2^^59 - 1 */
 149
 150 #ifndef CONFIG_CPU_R8000
 151
 152 /*
 153  * The R8000 doesn't have the 32-bit compat spaces so we don't define them
 154  * in order to catch bugs in the source code.
 155  */
 156
 157 #define COMPAT_K1BASE32         _CONST64_(0xffffffffa0000000)
 158 #define PHYS_TO_COMPATK1(x)     ((x) | COMPAT_K1BASE32) /* 32-bit compat k1 */
 159
 160 #endif
 161
 162 #define KDM_TO_PHYS(x)          (_ACAST64_ (x) & TO_PHYS_MASK)
 163 #define PHYS_TO_K0(x)           (_ACAST64_ (x) | CAC_BASE)
 164
 165 #endif /* _ASM_ADDRSPACE_H */