text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
   * Copyright (C) 2000, 2002  Maciej W. Rozycki
   * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
   */
  #ifndef _ASM_MACH_GENERIC_SPACES_H
  #define _ASM_MACH_GENERIC_SPACES_H
  
  #include <asm/const.h>
  
  /*
   * This gives the physical RAM offset.
   */
  #ifndef PHYS_OFFSET
  #define PHYS_OFFSET		_AC(0, UL)
  #endif
  
  #ifdef CONFIG_32BIT
  #ifdef CONFIG_KVM_GUEST
  #define CAC_BASE		_AC(0x40000000, UL)
  #else
  #define CAC_BASE		_AC(0x80000000, UL)
  #endif
  #ifndef IO_BASE
  #define IO_BASE			_AC(0xa0000000, UL)
  #endif
  #ifndef UNCAC_BASE
  #define UNCAC_BASE		_AC(0xa0000000, UL)
  #endif
  
  #ifndef MAP_BASE
  #ifdef CONFIG_KVM_GUEST
  #define MAP_BASE		_AC(0x60000000, UL)
  #else
  #define MAP_BASE		_AC(0xc0000000, UL)
  #endif
  #endif
  
  /*
   * Memory above this physical address will be considered highmem.
   */
  #ifndef HIGHMEM_START
  #define HIGHMEM_START		_AC(0x20000000, UL)
  #endif
  
  #endif /* CONFIG_32BIT */
  
  #ifdef CONFIG_64BIT
  
  #ifndef CAC_BASE
  #ifdef CONFIG_DMA_NONCOHERENT
  #define CAC_BASE		_AC(0x9800000000000000, UL)
  #else
  #define CAC_BASE		_AC(0xa800000000000000, UL)
  #endif
  #endif
  
  #ifndef IO_BASE
  #define IO_BASE			_AC(0x9000000000000000, UL)
  #endif
  
  #ifndef UNCAC_BASE
  #define UNCAC_BASE		_AC(0x9000000000000000, UL)
  #endif
  
  #ifndef MAP_BASE
  #define MAP_BASE		_AC(0xc000000000000000, UL)
  #endif
  
  /*
   * Memory above this physical address will be considered highmem.
   * Fixme: 59 bits is a fictive number and makes assumptions about processors
   * in the distant future.  Nobody will care for a few years :-)
   */
  #ifndef HIGHMEM_START
  #define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
  #endif
  
  #define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
  #define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
  #define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
  
  #endif /* CONFIG_64BIT */
  
  /*
   * This handles the memory map.
   */
  #ifndef PAGE_OFFSET
  #define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
  #endif
  
  #ifndef FIXADDR_TOP
  #ifdef CONFIG_KVM_GUEST
  #define FIXADDR_TOP		((unsigned long)(long)(int)0x7ffe0000)
  #else
  #define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
  #endif
  #endif
  
  #endif /* __ASM_MACH_GENERIC_SPACES_H */
  