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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
* (C) Copyright 2008-2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <libfdt.h>
#include <malloc.h>
#include <asm/u-boot-x86.h>
#include <asm/relocate.h>
#include <asm/sections.h>
#include <elf.h>
int copy_uboot_to_ram(void)
{
size_t len = (size_t)&__data_end - (size_t)&__text_start;
memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
return 0;
}
int copy_fdt_to_ram(void)
{
if (gd->new_fdt) {
ulong fdt_size;
fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
debug("Relocated fdt from %p to %p, size %lx\n",
gd->fdt_blob, gd->new_fdt, fdt_size);
gd->fdt_blob = gd->new_fdt;
}
return 0;
}
int clear_bss(void)
{
ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
memset((void *)dst_addr, 0x00, len);
return 0;
}
/*
* This function has more error checking than you might expect. Please see
* the commit message for more informaiton.
*/
int do_elf_reloc_fixups(void)
{
Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
Elf32_Addr *offset_ptr_ram;
/* The size of the region of u-boot that runs out of RAM. */
uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
do {
/* Get the location from the relocation entry */
offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
/* Check that the location of the relocation is in .text */
if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE &&
offset_ptr_rom > last_offset) {
/* Switch to the in-RAM version */
offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
gd->reloc_off);
/* Check that the target points into .text */
if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
*offset_ptr_ram <=
(CONFIG_SYS_TEXT_BASE + size)) {
*offset_ptr_ram += gd->reloc_off;
} else {
debug(" %p: rom reloc %x, ram %p, value %x,"
" limit %lx\n", re_src,
re_src->r_offset, offset_ptr_ram,
*offset_ptr_ram,
CONFIG_SYS_TEXT_BASE + size);
}
} else {
debug(" %p: rom reloc %x, last %p\n", re_src,
re_src->r_offset, last_offset);
}
last_offset = offset_ptr_rom;
} while (++re_src < re_end);
return 0;
}
|
