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 #include <asm/mipsregs.h>
  16
  17 /*
  18  * This gives the physical RAM offset.
  19  */
  20 #ifndef PHYS_OFFSET
  21 #define PHYS_OFFSET             _AC(0, UL)
  22 #endif
  23
  24 #ifdef CONFIG_32BIT
  25 #ifdef CONFIG_KVM_GUEST
  26 #define CAC_BASE                _AC(0x40000000, UL)
  27 #else
  28 #define CAC_BASE                _AC(0x80000000, UL)
  29 #endif
  30 #ifndef IO_BASE
  31 #define IO_BASE                 _AC(0xa0000000, UL)
  32 #endif
  33 #ifndef UNCAC_BASE
  34 #define UNCAC_BASE              _AC(0xa0000000, UL)
  35 #endif
  36
  37 #ifndef MAP_BASE
  38 #ifdef CONFIG_KVM_GUEST
  39 #define MAP_BASE                _AC(0x60000000, UL)
  40 #else
  41 #define MAP_BASE                _AC(0xc0000000, UL)
  42 #endif
  43 #endif
  44
  45 /*
  46  * Memory above this physical address will be considered highmem.
  47  */
  48 #ifndef HIGHMEM_START
  49 #define HIGHMEM_START           _AC(0x20000000, UL)
  50 #endif
  51
  52 #endif /* CONFIG_32BIT */
  53
  54 #ifdef CONFIG_64BIT
  55
  56 #ifndef CAC_BASE
  57 #define CAC_BASE        PHYS_TO_XKPHYS(read_c0_config() & CONF_CM_CMASK, 0)
  58 #endif
  59
  60 #ifndef IO_BASE
  61 #define IO_BASE                 _AC(0x9000000000000000, UL)
  62 #endif
  63
  64 #ifndef UNCAC_BASE
  65 #define UNCAC_BASE              _AC(0x9000000000000000, UL)
  66 #endif
  67
  68 #ifndef MAP_BASE
  69 #define MAP_BASE                _AC(0xc000000000000000, UL)
  70 #endif
  71
  72 /*
  73  * Memory above this physical address will be considered highmem.
  74  * Fixme: 59 bits is a fictive number and makes assumptions about processors
  75  * in the distant future.  Nobody will care for a few years :-)
  76  */
  77 #ifndef HIGHMEM_START
  78 #define HIGHMEM_START           (_AC(1, UL) << _AC(59, UL))
  79 #endif
  80
  81 #define TO_PHYS(x)              (             ((x) & TO_PHYS_MASK))
  82 #define TO_CAC(x)               (CAC_BASE   | ((x) & TO_PHYS_MASK))
  83 #define TO_UNCAC(x)             (UNCAC_BASE | ((x) & TO_PHYS_MASK))
  84
  85 #endif /* CONFIG_64BIT */
  86
  87 /*
  88  * This handles the memory map.
  89  */
  90 #ifndef PAGE_OFFSET
  91 #define PAGE_OFFSET             (CAC_BASE + PHYS_OFFSET)
  92 #endif
  93
  94 #ifndef FIXADDR_TOP
  95 #ifdef CONFIG_KVM_GUEST
  96 #define FIXADDR_TOP             ((unsigned long)(long)(int)0x7ffe0000)
  97 #else
  98 #define FIXADDR_TOP             ((unsigned long)(long)(int)0xfffe0000)
  99 #endif
 100 #endif
 101
 102 #endif /* __ASM_MACH_GENERIC_SPACES_H */