1/*
2 * include/asm-blackfin/flat.h -- uClinux flat-format executables
3 *
4 * Copyright (C) 2003,
5 *
6 */
7
8#ifndef __BLACKFIN_FLAT_H__
9#define __BLACKFIN_FLAT_H__
10
11#include <asm/unaligned.h>
12
13#define	flat_stack_align(sp)	/* nothing needed */
14#define	flat_argvp_envp_on_stack()		0
15#define	flat_old_ram_flag(flags)		(flags)
16
17extern unsigned long bfin_get_addr_from_rp (unsigned long *ptr,
18					unsigned long relval,
19					unsigned long flags,
20					unsigned long *persistent);
21
22extern void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
23		                unsigned long relval);
24
25/* The amount by which a relocation can exceed the program image limits
26   without being regarded as an error.  */
27
28#define	flat_reloc_valid(reloc, size)	((reloc) <= (size))
29
30#define	flat_get_addr_from_rp(rp, relval, flags, persistent)	\
31	bfin_get_addr_from_rp(rp, relval, flags, persistent)
32#define	flat_put_addr_at_rp(rp, val, relval)	\
33	bfin_put_addr_at_rp(rp, val, relval)
34
35/* Convert a relocation entry into an address.  */
36static inline unsigned long
37flat_get_relocate_addr (unsigned long relval)
38{
39	return relval & 0x03ffffff; /* Mask out top 6 bits */
40}
41
42static inline int flat_set_persistent(unsigned long relval,
43				      unsigned long *persistent)
44{
45	int type = (relval >> 26) & 7;
46	if (type == 3) {
47		*persistent = relval << 16;
48		return 1;
49	}
50	return 0;
51}
52
53static inline int flat_addr_absolute(unsigned long relval)
54{
55	return (relval & (1 << 29)) != 0;
56}
57
58#endif				/* __BLACKFIN_FLAT_H__ */
59