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#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 */
 103