arch/mips/include/asm/mach-generic/spaces.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) 1994 - 1999, 2000, 03, 04 Ralf Baechle
   7  * Copyright (C) 2000, 2002  Maciej W. Rozycki
   8  * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
   9  */
  10 #ifndef _ASM_MACH_GENERIC_SPACES_H
  11 #define _ASM_MACH_GENERIC_SPACES_H
  12
  13 #include <linux/const.h>
  14
  15 /*
  16  * This gives the physical RAM offset.
  17  */
  18 #ifndef PHYS_OFFSET
  19 #define PHYS_OFFSET             _AC(0, UL)
  20 #endif
  21
  22 #ifdef CONFIG_32BIT
  23 #ifdef CONFIG_KVM_GUEST
  24 #define CAC_BASE                _AC(0x40000000, UL)
  25 #else
  26 #define CAC_BASE                _AC(0x80000000, UL)
  27 #endif
  28 #ifndef IO_BASE
  29 #define IO_BASE                 _AC(0xa0000000, UL)
  30 #endif
  31 #ifndef UNCAC_BASE
  32 #define UNCAC_BASE              _AC(0xa0000000, UL)
  33 #endif
  34
  35 #ifndef MAP_BASE
  36 #ifdef CONFIG_KVM_GUEST
  37 #define MAP_BASE                _AC(0x60000000, UL)
  38 #else
  39 #define MAP_BASE                _AC(0xc0000000, UL)
  40 #endif
  41 #endif
  42
  43 /*
  44  * Memory above this physical address will be considered highmem.
  45  */
  46 #ifndef HIGHMEM_START
  47 #define HIGHMEM_START           _AC(0x20000000, UL)
  48 #endif
  49
  50 #endif /* CONFIG_32BIT */
  51
  52 #ifdef CONFIG_64BIT
  53
  54 #ifndef CAC_BASE
  55 #ifdef CONFIG_DMA_NONCOHERENT
  56 #define CAC_BASE                _AC(0x9800000000000000, UL)
  57 #else
  58 #define CAC_BASE                _AC(0xa800000000000000, UL)
  59 #endif
  60 #endif
  61
  62 #ifndef IO_BASE
  63 #define IO_BASE                 _AC(0x9000000000000000, UL)
  64 #endif
  65
  66 #ifndef UNCAC_BASE
  67 #define UNCAC_BASE              _AC(0x9000000000000000, UL)
  68 #endif
  69
  70 #ifndef MAP_BASE
  71 #define MAP_BASE                _AC(0xc000000000000000, UL)
  72 #endif
  73
  74 /*
  75  * Memory above this physical address will be considered highmem.
  76  * Fixme: 59 bits is a fictive number and makes assumptions about processors
  77  * in the distant future.  Nobody will care for a few years :-)
  78  */
  79 #ifndef HIGHMEM_START
  80 #define HIGHMEM_START           (_AC(1, UL) << _AC(59, UL))
  81 #endif
  82
  83 #define TO_PHYS(x)              (             ((x) & TO_PHYS_MASK))
  84 #define TO_CAC(x)               (CAC_BASE   | ((x) & TO_PHYS_MASK))
  85 #define TO_UNCAC(x)             (UNCAC_BASE | ((x) & TO_PHYS_MASK))
  86
  87 #endif /* CONFIG_64BIT */
  88
  89 /*
  90  * This handles the memory map.
  91  */
  92 #ifndef PAGE_OFFSET
  93 #define PAGE_OFFSET             (CAC_BASE + PHYS_OFFSET)
  94 #endif
  95
  96 #ifndef FIXADDR_TOP
  97 #ifdef CONFIG_KVM_GUEST
  98 #define FIXADDR_TOP             ((unsigned long)(long)(int)0x7ffe0000)
  99 #else
 100 #define FIXADDR_TOP             ((unsigned long)(long)(int)0xfffe0000)
 101 #endif
 102 #endif
 103
 104 #endif /* __ASM_MACH_GENERIC_SPACES_H */