/* * (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> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <libfdt.h> #include <malloc.h> #include <asm/u-boot-x86.h> #include <asm/relocate.h> #include <asm/sections.h> #include <elf.h> DECLARE_GLOBAL_DATA_PTR; 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; } int copy_fdt_to_ram(void) { if (gd->new_fdt) { ulong fdt_size; fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32); memcpy(gd->new_fdt, gd->fdt_blob, fdt_size); debug("Relocated fdt from %p to %p, size %lx\n", gd->fdt_blob, gd->new_fdt, fdt_size); gd->fdt_blob = gd->new_fdt; } return 0; } 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; } /* * This function has more error checking than you might expect. Please see * the commit message for more informaiton. */ 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, *last_offset = NULL; 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 && offset_ptr_rom > last_offset) { /* 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; } else { debug(" %p: rom reloc %x, ram %p, value %x," " limit %lx\n", re_src, re_src->r_offset, offset_ptr_ram, *offset_ptr_ram, CONFIG_SYS_TEXT_BASE + size); } } else { debug(" %p: rom reloc %x, last %p\n", re_src, re_src->r_offset, last_offset); } last_offset = offset_ptr_rom; } while (++re_src < re_end); return 0; }