mirror of
https://github.com/AsahiLinux/u-boot
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91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* (C) Copyright 2008-2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/u-boot-x86.h>
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#include <asm/relocate.h>
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#include <elf.h>
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int copy_uboot_to_ram(void)
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{
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size_t len = (size_t)&__data_end - (size_t)&__text_start;
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memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
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return 0;
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}
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int clear_bss(void)
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{
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ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
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size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
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memset((void *)dst_addr, 0x00, len);
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return 0;
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}
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int do_elf_reloc_fixups(void)
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{
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Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
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Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
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Elf32_Addr *offset_ptr_rom;
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Elf32_Addr *offset_ptr_ram;
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/* The size of the region of u-boot that runs out of RAM. */
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uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
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do {
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/* Get the location from the relocation entry */
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offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
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/* Check that the location of the relocation is in .text */
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if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
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/* Switch to the in-RAM version */
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offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
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gd->reloc_off);
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/* Check that the target points into .text */
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if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
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*offset_ptr_ram <=
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(CONFIG_SYS_TEXT_BASE + size)) {
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*offset_ptr_ram += gd->reloc_off;
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}
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}
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} while (++re_src < re_end);
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return 0;
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}
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