blob: 200baaba6a2707c28fabc82cb93054158cdff5c0 [file] [log] [blame]
Graeme Russ6ae6dd82011-12-23 15:57:58 +11001/*
2 * (C) Copyright 2008-2011
3 * Graeme Russ, <graeme.russ@gmail.com>
4 *
5 * (C) Copyright 2002
6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
7 *
8 * (C) Copyright 2002
9 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
10 *
11 * (C) Copyright 2002
12 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13 * Marius Groeger <mgroeger@sysgo.de>
14 *
15 * See file CREDITS for list of people who contributed to this
16 * project.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * MA 02111-1307 USA
32 */
33
34#include <common.h>
35#include <malloc.h>
36#include <asm/u-boot-x86.h>
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110037#include <asm/relocate.h>
Graeme Russ6ae6dd82011-12-23 15:57:58 +110038#include <elf.h>
39
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110040int copy_uboot_to_ram(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110041{
42 size_t len = (size_t)&__data_end - (size_t)&__text_start;
43
44 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
45
46 return 0;
47}
48
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110049int clear_bss(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110050{
51 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
52 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
53
54 memset((void *)dst_addr, 0x00, len);
55
56 return 0;
57}
58
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110059int do_elf_reloc_fixups(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110060{
61 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
62 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
63
64 Elf32_Addr *offset_ptr_rom;
65 Elf32_Addr *offset_ptr_ram;
66
67 /* The size of the region of u-boot that runs out of RAM. */
68 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
69
70 do {
71 /* Get the location from the relocation entry */
72 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
73
74 /* Check that the location of the relocation is in .text */
75 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
76
77 /* Switch to the in-RAM version */
78 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
79 gd->reloc_off);
80
81 /* Check that the target points into .text */
82 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
83 *offset_ptr_ram <
84 (CONFIG_SYS_TEXT_BASE + size)) {
85 *offset_ptr_ram += gd->reloc_off;
86 }
87 }
88 } while (re_src++ < re_end);
89
90 return 0;
91}