/*
   * Definitions for talking to the Open Firmware PROM on
   * Power Macintosh computers.
   *
   * Copyright (C) 1996 Paul Mackerras.
   */
  #ifdef __KERNEL__
  #ifndef _PPC_PROM_H
  #define _PPC_PROM_H

  /* This is used in arch/ppc/mm/mem_pieces.h */

  struct reg_property {
  	unsigned int address;
  	unsigned int size;
  };

  /*

   * These macros assist in performing the address calculations that we
   * need to do to access data when the kernel is running at an address
   * that is different from the address that the kernel is linked at.
   * The reloc_offset() function returns the difference between these
   * two addresses and the macros simplify the process of adding or
   * subtracting this offset to/from pointer values.

   */
  extern unsigned long reloc_offset(void);
  extern unsigned long add_reloc_offset(unsigned long);
  extern unsigned long sub_reloc_offset(unsigned long);
  
  #define PTRRELOC(x)	((typeof(x))add_reloc_offset((unsigned long)(x)))
  #define PTRUNRELOC(x)	((typeof(x))sub_reloc_offset((unsigned long)(x)))

  /*

   * Fallback definitions since we don't support OF in arch/ppc any more.

   */
  #define machine_is_compatible(x)		0
  #define of_find_compatible_node(f, t, c)	NULL

  #define of_get_property(p, n, l)		NULL
  #define get_property(a, b, c)			of_get_property((a), (b), (c))

  #endif /* _PPC_PROM_H */
  #endif /* __KERNEL__ */