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 * SPDX-License-Identifier: GPL-2.0+
20 #include <asm/u-boot-x86.h>
21 #include <asm/relocate.h>
22 #include <asm/sections.h>
25 DECLARE_GLOBAL_DATA_PTR;
27 int copy_uboot_to_ram(void)
29 size_t len = (size_t)&__data_end - (size_t)&__text_start;
31 if (gd->flags & GD_FLG_SKIP_RELOC)
33 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
40 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
41 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
43 if (gd->flags & GD_FLG_SKIP_RELOC)
45 memset((void *)dst_addr, 0x00, len);
51 * This function has more error checking than you might expect. Please see
52 * the commit message for more informaiton.
54 int do_elf_reloc_fixups(void)
56 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
57 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
59 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
60 Elf32_Addr *offset_ptr_ram;
61 unsigned int text_base = 0;
63 /* The size of the region of u-boot that runs out of RAM. */
64 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
66 if (gd->flags & GD_FLG_SKIP_RELOC)
69 panic("No relocation data");
71 #ifdef CONFIG_SYS_TEXT_BASE
72 text_base = CONFIG_SYS_TEXT_BASE;
74 panic("No CONFIG_SYS_TEXT_BASE");
77 /* Get the location from the relocation entry */
78 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
80 /* Check that the location of the relocation is in .text */
81 if (offset_ptr_rom >= (Elf32_Addr *)text_base &&
82 offset_ptr_rom > last_offset) {
84 /* Switch to the in-RAM version */
85 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
88 /* Check that the target points into .text */
89 if (*offset_ptr_ram >= text_base &&
90 *offset_ptr_ram <= text_base + size) {
91 *offset_ptr_ram += gd->reloc_off;
93 debug(" %p: rom reloc %x, ram %p, value %x,"
94 " limit %" PRIXPTR "\n", re_src,
95 re_src->r_offset, offset_ptr_ram,
100 debug(" %p: rom reloc %x, last %p\n", re_src,
101 re_src->r_offset, last_offset);
103 last_offset = offset_ptr_rom;
105 } while (++re_src < re_end);