2 * (C) Copyright 2008-2011
3 * Graeme Russ, <graeme.russ@gmail.com>
6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
9 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
12 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13 * Marius Groeger <mgroeger@sysgo.de>
15 * See file CREDITS for list of people who contributed to this
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.
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.
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,
37 #include <asm/u-boot-x86.h>
38 #include <asm/relocate.h>
39 #include <asm/sections.h>
42 int copy_uboot_to_ram(void)
44 size_t len = (size_t)&__data_end - (size_t)&__text_start;
46 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
51 int copy_fdt_to_ram(void)
56 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
58 memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
59 debug("Relocated fdt from %p to %p, size %lx\n",
60 gd->fdt_blob, gd->new_fdt, fdt_size);
61 gd->fdt_blob = gd->new_fdt;
69 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
70 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
72 memset((void *)dst_addr, 0x00, len);
78 * This function has more error checking than you might expect. Please see
79 * the commit message for more informaiton.
81 int do_elf_reloc_fixups(void)
83 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
84 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
86 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
87 Elf32_Addr *offset_ptr_ram;
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;
93 /* Get the location from the relocation entry */
94 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
96 /* Check that the location of the relocation is in .text */
97 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE &&
98 offset_ptr_rom > last_offset) {
100 /* Switch to the in-RAM version */
101 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
104 /* Check that the target points into .text */
105 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
107 (CONFIG_SYS_TEXT_BASE + size)) {
108 *offset_ptr_ram += gd->reloc_off;
110 debug(" %p: rom reloc %x, ram %p, value %x,"
111 " limit %lx\n", re_src,
112 re_src->r_offset, offset_ptr_ram,
114 CONFIG_SYS_TEXT_BASE + size);
117 debug(" %p: rom reloc %x, last %p\n", re_src,
118 re_src->r_offset, last_offset);
120 last_offset = offset_ptr_rom;
122 } while (++re_src < re_end);