upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
3.0 KiB
115 lines
3.0 KiB
/*
|
|
* (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 <malloc.h>
|
|
#include <asm/u-boot-x86.h>
|
|
#include <elf.h>
|
|
|
|
static int copy_uboot_to_ram(void);
|
|
static int clear_bss(void);
|
|
static int do_elf_reloc_fixups(void);
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
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) {
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
} while (re_src++ < re_end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void relocate_code(ulong dummy_1, gd_t *id, ulong dummy_2)
|
|
{
|
|
/*
|
|
* Copy U-Boot into RAM, clear the BSS and perform relocation
|
|
* adjustments
|
|
*/
|
|
copy_uboot_to_ram();
|
|
clear_bss();
|
|
do_elf_reloc_fixups();
|
|
|
|
/*
|
|
* Transfer execution from Flash to RAM by calculating the address
|
|
* of the in-RAM copy of board_init_r() and calling it
|
|
*/
|
|
(board_init_r + gd->reloc_off)(gd, gd->relocaddr);
|
|
|
|
/* NOTREACHED - board_init_r() does not return */
|
|
while (1)
|
|
;
|
|
}
|
|
|