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+
22 #include <asm/u-boot-x86.h>
23 #include <asm/relocate.h>
24 #include <asm/sections.h>
27 DECLARE_GLOBAL_DATA_PTR;
29 int copy_uboot_to_ram(void)
31 size_t len = (size_t)&__data_end - (size_t)&__text_start;
33 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
38 int copy_fdt_to_ram(void)
43 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
45 memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
46 debug("Relocated fdt from %p to %p, size %lx\n",
47 gd->fdt_blob, gd->new_fdt, fdt_size);
48 gd->fdt_blob = gd->new_fdt;
56 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
57 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
59 memset((void *)dst_addr, 0x00, len);
65 * This function has more error checking than you might expect. Please see
66 * the commit message for more informaiton.
68 int do_elf_reloc_fixups(void)
70 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
71 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
73 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
74 Elf32_Addr *offset_ptr_ram;
76 /* The size of the region of u-boot that runs out of RAM. */
77 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
80 panic("No relocation data");
83 /* Get the location from the relocation entry */
84 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
86 /* Check that the location of the relocation is in .text */
87 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE &&
88 offset_ptr_rom > last_offset) {
90 /* Switch to the in-RAM version */
91 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
94 /* Check that the target points into .text */
95 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
97 (CONFIG_SYS_TEXT_BASE + size)) {
98 *offset_ptr_ram += gd->reloc_off;
100 debug(" %p: rom reloc %x, ram %p, value %x,"
101 " limit %" PRIXPTR "\n", re_src,
102 re_src->r_offset, offset_ptr_ram,
104 CONFIG_SYS_TEXT_BASE + size);
107 debug(" %p: rom reloc %x, last %p\n", re_src,
108 re_src->r_offset, last_offset);
110 last_offset = offset_ptr_rom;
112 } while (++re_src < re_end);