#ifndef _PPC_BOOT_PAGE_H
  #define _PPC_BOOT_PAGE_H
  /*
   * Copyright (C) 2001 PPC64 Team, IBM Corp
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #ifdef __ASSEMBLY__
  #define ASM_CONST(x) x
  #else
  #define __ASM_CONST(x) x##UL
  #define ASM_CONST(x) __ASM_CONST(x)
  #endif
  
  /* PAGE_SHIFT determines the page size */
  #define PAGE_SHIFT	12
  #define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT)
  #define PAGE_MASK	(~(PAGE_SIZE-1))
  
  /* align addr on a size boundary - adjust address up/down if needed */
  #define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
  #define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
  
  /* align addr on a size boundary - adjust address up if needed */
  #define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
  
  /* to align the pointer to the (next) page boundary */
  #define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
  
  #endif				/* _PPC_BOOT_PAGE_H */