blob: b33586b54c0311a9b596cbcca23ed357ab78b3e0 [file] [log] [blame]
Graeme Russb156ff02011-12-23 15:57:58 +11001/*
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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020015 * SPDX-License-Identifier: GPL-2.0+
Graeme Russb156ff02011-12-23 15:57:58 +110016 */
17
18#include <common.h>
Simon Glass6bcb8ad2014-10-15 04:38:36 -060019#include <inttypes.h>
Simon Glassf697d522013-02-28 19:26:15 +000020#include <libfdt.h>
Graeme Russb156ff02011-12-23 15:57:58 +110021#include <malloc.h>
22#include <asm/u-boot-x86.h>
Graeme Russa1d57b72011-12-23 21:14:22 +110023#include <asm/relocate.h>
Simon Glass86cfb6b2013-03-05 14:39:54 +000024#include <asm/sections.h>
Graeme Russb156ff02011-12-23 15:57:58 +110025#include <elf.h>
26
Simon Glass7282d832013-04-17 16:13:33 +000027DECLARE_GLOBAL_DATA_PTR;
28
Graeme Russa1d57b72011-12-23 21:14:22 +110029int copy_uboot_to_ram(void)
Graeme Russb156ff02011-12-23 15:57:58 +110030{
31 size_t len = (size_t)&__data_end - (size_t)&__text_start;
32
33 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
34
35 return 0;
36}
37
Simon Glassf697d522013-02-28 19:26:15 +000038int copy_fdt_to_ram(void)
39{
Simon Glass1938f4a2013-03-11 06:49:53 +000040 if (gd->new_fdt) {
Simon Glassf697d522013-02-28 19:26:15 +000041 ulong fdt_size;
42
43 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
44
Simon Glass1938f4a2013-03-11 06:49:53 +000045 memcpy(gd->new_fdt, gd->fdt_blob, fdt_size);
Simon Glassf697d522013-02-28 19:26:15 +000046 debug("Relocated fdt from %p to %p, size %lx\n",
Simon Glass1938f4a2013-03-11 06:49:53 +000047 gd->fdt_blob, gd->new_fdt, fdt_size);
48 gd->fdt_blob = gd->new_fdt;
Simon Glassf697d522013-02-28 19:26:15 +000049 }
50
51 return 0;
52}
53
Graeme Russa1d57b72011-12-23 21:14:22 +110054int clear_bss(void)
Graeme Russb156ff02011-12-23 15:57:58 +110055{
56 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
57 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
58
59 memset((void *)dst_addr, 0x00, len);
60
61 return 0;
62}
63
Simon Glass62f79702013-02-28 19:26:16 +000064/*
65 * This function has more error checking than you might expect. Please see
66 * the commit message for more informaiton.
67 */
Graeme Russa1d57b72011-12-23 21:14:22 +110068int do_elf_reloc_fixups(void)
Graeme Russb156ff02011-12-23 15:57:58 +110069{
70 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
71 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
72
Simon Glass62f79702013-02-28 19:26:16 +000073 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
Graeme Russb156ff02011-12-23 15:57:58 +110074 Elf32_Addr *offset_ptr_ram;
75
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;
78
Simon Glass512e5812014-11-14 18:18:23 -070079 if (re_src == re_end)
80 panic("No relocation data");
81
Graeme Russb156ff02011-12-23 15:57:58 +110082 do {
83 /* Get the location from the relocation entry */
84 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
85
86 /* Check that the location of the relocation is in .text */
Simon Glass62f79702013-02-28 19:26:16 +000087 if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE &&
88 offset_ptr_rom > last_offset) {
Graeme Russb156ff02011-12-23 15:57:58 +110089
90 /* Switch to the in-RAM version */
91 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
92 gd->reloc_off);
93
94 /* Check that the target points into .text */
95 if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
Gabe Black842d3382012-11-03 11:41:25 +000096 *offset_ptr_ram <=
Graeme Russb156ff02011-12-23 15:57:58 +110097 (CONFIG_SYS_TEXT_BASE + size)) {
98 *offset_ptr_ram += gd->reloc_off;
Simon Glass62f79702013-02-28 19:26:16 +000099 } else {
100 debug(" %p: rom reloc %x, ram %p, value %x,"
Simon Glass6bcb8ad2014-10-15 04:38:36 -0600101 " limit %" PRIXPTR "\n", re_src,
Simon Glass62f79702013-02-28 19:26:16 +0000102 re_src->r_offset, offset_ptr_ram,
103 *offset_ptr_ram,
104 CONFIG_SYS_TEXT_BASE + size);
Graeme Russb156ff02011-12-23 15:57:58 +1100105 }
Simon Glass62f79702013-02-28 19:26:16 +0000106 } else {
107 debug(" %p: rom reloc %x, last %p\n", re_src,
108 re_src->r_offset, last_offset);
Graeme Russb156ff02011-12-23 15:57:58 +1100109 }
Simon Glass62f79702013-02-28 19:26:16 +0000110 last_offset = offset_ptr_rom;
111
Duncan Laurie0c392902012-10-23 18:04:43 +0000112 } while (++re_src < re_end);
Graeme Russb156ff02011-12-23 15:57:58 +1100113
114 return 0;
115}