[linux-2.6-block.git] / include / asm-ppc / prom.h

/*
 * 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 get_property(p, n, l)			NULL

#endif /* _PPC_PROM_H */
#endif /* __KERNEL__ */
Commit	Line	Data
1da177e4 LT	1	/*
	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
0a26b136	11	/* This is used in arch/ppc/mm/mem_pieces.h */
1da177e4 LT	12	struct reg_property {
	13	unsigned int address;
	14	unsigned int size;
	15	};
	16
1da177e4	17	/*
0a26b136 PM	18	* 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.
1da177e4 LT	24	*/
	25	extern unsigned long reloc_offset(void);
	26	extern unsigned long add_reloc_offset(unsigned long);
	27	extern 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
a7fdd90b	32	/*
0a26b136	33	* Fallback definitions since we don't support OF in arch/ppc any more.
a7fdd90b PM	34	*/
	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
d1405b86	38
1da177e4 LT	39	#endif /* _PPC_PROM_H */
1da177e4 LT	40	#endif /* __KERNEL__ */