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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>
Simon Glass347c05b2013-02-28 19:26:15 +000035#include <libfdt.h>
Graeme Russ6ae6dd82011-12-23 15:57:58 +110036#include <malloc.h>
37#include <asm/u-boot-x86.h>
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110038#include <asm/relocate.h>
Simon Glass3e93e332013-03-05 14:39:54 +000039#include <asm/sections.h>
Graeme Russ6ae6dd82011-12-23 15:57:58 +110040#include <elf.h>
41
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110042int copy_uboot_to_ram(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110043{
44 size_t len = (size_t)&__data_end - (size_t)&__text_start;
45
46 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
47
48 return 0;
49}
50
Simon Glass347c05b2013-02-28 19:26:15 +000051int copy_fdt_to_ram(void)
52{
Simon Glassc45e3592013-03-11 06:49:53 +000053 if (gd->new_fdt) {
Simon Glass347c05b2013-02-28 19:26:15 +000054 ulong fdt_size;
55
56 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
57
Simon Glassc45e3592013-03-11 06:49:53 +000058 memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
Simon Glass347c05b2013-02-28 19:26:15 +000059 debug("Relocated fdt from %p to %p, size %lx\n",
Simon Glassc45e3592013-03-11 06:49:53 +000060 gd->fdt_blob, gd->new_fdt, fdt_size);
61 gd->fdt_blob = gd->new_fdt;
Simon Glass347c05b2013-02-28 19:26:15 +000062 }
63
64 return 0;
65}
66
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110067int clear_bss(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110068{
69 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
70 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
71
72 memset((void *)dst_addr, 0x00, len);
73
74 return 0;
75}
76
Simon Glassb0ba9a42013-02-28 19:26:16 +000077/*
78 * This function has more error checking than you might expect. Please see
79 * the commit message for more informaiton.
80 */
Graeme Russ3fb4f9e2011-12-23 21:14:22 +110081int do_elf_reloc_fixups(void)
Graeme Russ6ae6dd82011-12-23 15:57:58 +110082{
83 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
84 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
85
Simon Glassb0ba9a42013-02-28 19:26:16 +000086 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
Graeme Russ6ae6dd82011-12-23 15:57:58 +110087 Elf32_Addr *offset_ptr_ram;
88
89 /* The size of the region of u-boot that runs out of RAM. */
90 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
91
92 do {
93 /* Get the location from the relocation entry */
94 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
95
96 /* Check that the location of the relocation is in .text */
Simon Glassb0ba9a42013-02-28 19:26:16 +000097 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE &&
98 offset_ptr_rom > last_offset) {
Graeme Russ6ae6dd82011-12-23 15:57:58 +110099
100 /* Switch to the in-RAM version */
101 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
102 gd->reloc_off);
103
104 /* Check that the target points into .text */
105 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
Gabe Blackc1b58772012-11-03 11:41:25 +0000106 *offset_ptr_ram <=
Graeme Russ6ae6dd82011-12-23 15:57:58 +1100107 (CONFIG_SYS_TEXT_BASE + size)) {
108 *offset_ptr_ram += gd->reloc_off;
Simon Glassb0ba9a42013-02-28 19:26:16 +0000109 } else {
110 debug(" %p: rom reloc %x, ram %p, value %x,"
111 " limit %lx\n", re_src,
112 re_src->r_offset, offset_ptr_ram,
113 *offset_ptr_ram,
114 CONFIG_SYS_TEXT_BASE + size);
Graeme Russ6ae6dd82011-12-23 15:57:58 +1100115 }
Simon Glassb0ba9a42013-02-28 19:26:16 +0000116 } else {
117 debug(" %p: rom reloc %x, last %p\n", re_src,
118 re_src->r_offset, last_offset);
Graeme Russ6ae6dd82011-12-23 15:57:58 +1100119 }
Simon Glassb0ba9a42013-02-28 19:26:16 +0000120 last_offset = offset_ptr_rom;
121
Duncan Lauriebf4c9fb2012-10-23 18:04:43 +0000122 } while (++re_src < re_end);
Graeme Russ6ae6dd82011-12-23 15:57:58 +1100123
124 return 0;
125}