summaryrefslogtreecommitdiff
path: root/include/reloc.h
blob: d450097ddedce024bcf485deff78f64749c2b190 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
#ifndef __RELOC_H
#define __RELOC_H

extern unsigned long _u_boot_start, _bss_start, _bss_end, _text_base;

#ifdef CONFIG_HAS_EARLY_INIT

extern ulong __early_init_data_begin, __early_init_data_end;

/*
 * The difference between our link address and the address we're
 * currently running at.
 */
unsigned long reloc_offset(void);

/*
 * When not running at link address, relocate a pointer by
 * taking reloc_offset() into account
 */
#define RELOC(a) (typeof(*a) *)((unsigned long)a + reloc_offset())

/*
 * dito, used for variables
 */
#define RELOC_VAR(v) *(typeof(v)* )((unsigned long)&v + reloc_offset())

void early_init(void);

/*
 * put a variable into early init RAM. This section will
 * be relocated into SRAM during early init
 */
#define __initdata	__attribute__ ((__section__ (".early_init_data")))

/* Access init data */
#define INITDATA(var) *(typeof(var) *)((ulong)(&var) - \
		(ulong)&__early_init_data_begin + \
		(ulong)RELOC_VAR(init_data_ptr))

extern void *init_data_ptr;

#else

static inline int reloc_offset(void)
{
	return 0;
}

static inline void early_init(void)
{
}

#define RELOC(a) a
#define RELOC_VAR(v) v

#define __initdata

#define INITDATA(var)	var

#endif /* CONFIG_HAS_EARLY_INIT */

#endif /* __RELOC_H */