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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Definitions for talking to the Open Firmware PROM on
3 * Power Macintosh computers.
4 *
5 * Copyright (C) 1996 Paul Mackerras.
6 */
7#ifdef __KERNEL__
8#ifndef _PPC_PROM_H
9#define _PPC_PROM_H
10
Paul Mackerras0a26b132006-03-28 10:22:10 +110011/* This is used in arch/ppc/mm/mem_pieces.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -070012struct reg_property {
13 unsigned int address;
14 unsigned int size;
15};
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017/*
Paul Mackerras0a26b132006-03-28 10:22:10 +110018 * These macros assist in performing the address calculations that we
19 * need to do to access data when the kernel is running at an address
20 * that is different from the address that the kernel is linked at.
21 * The reloc_offset() function returns the difference between these
22 * two addresses and the macros simplify the process of adding or
23 * subtracting this offset to/from pointer values.
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
25extern unsigned long reloc_offset(void);
26extern unsigned long add_reloc_offset(unsigned long);
27extern unsigned long sub_reloc_offset(unsigned long);
28
29#define PTRRELOC(x) ((typeof(x))add_reloc_offset((unsigned long)(x)))
30#define PTRUNRELOC(x) ((typeof(x))sub_reloc_offset((unsigned long)(x)))
31
Benjamin Herrenschmidtd1405b82005-11-23 17:53:42 +110032/*
Paul Mackerras0a26b132006-03-28 10:22:10 +110033 * Fallback definitions since we don't support OF in arch/ppc any more.
Paul Mackerrasa7fdd902006-01-15 17:30:44 +110034 */
35#define machine_is_compatible(x) 0
36#define of_find_compatible_node(f, t, c) NULL
37#define get_property(p, n, l) NULL
Benjamin Herrenschmidtd1405b82005-11-23 17:53:42 +110038
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#endif /* _PPC_PROM_H */
40#endif /* __KERNEL__ */