LXR linux/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#define FIXADDR_TOP             ((unsigned long)(long)(int)0xfffe0000)
  98#endif
  99
 100#endif /* __ASM_MACH_GENERIC_SPACES_H */
 101