1 /* 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> 37 #include <asm/relocate.h> 38 #include <elf.h> 39 40 int copy_uboot_to_ram(void) 41 { 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 49 int clear_bss(void) 50 { 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 59 int do_elf_reloc_fixups(void) 60 { 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 } 92