2 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/sections.h>
11 DECLARE_GLOBAL_DATA_PTR;
13 int copy_uboot_to_ram(void)
15 size_t len = (size_t)&__image_copy_end - (size_t)&__image_copy_start;
17 memcpy((void *)gd->relocaddr, (void *)&__image_copy_start, len);
24 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
25 size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
27 memset((void *)dst_addr, 0x00, len);
33 * Base functionality is taken from x86 version with added ARC-specifics
35 int do_elf_reloc_fixups(void)
37 Elf32_Rela *re_src = (Elf32_Rela *)(&__rel_dyn_start);
38 Elf32_Rela *re_end = (Elf32_Rela *)(&__rel_dyn_end);
40 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
41 Elf32_Addr *offset_ptr_ram;
44 /* Get the location from the relocation entry */
45 offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
47 /* Check that the location of the relocation is in .text */
48 if (offset_ptr_rom >= (Elf32_Addr *)&__image_copy_start &&
49 offset_ptr_rom > last_offset) {
51 /* Switch to the in-RAM version */
52 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
56 * Use "memcpy" because target location might be
57 * 16-bit aligned on ARC so we may need to read
58 * byte-by-byte. On attempt to read entire word by
59 * CPU throws an exception
61 memcpy(&val, offset_ptr_ram, sizeof(int));
63 #ifdef __LITTLE_ENDIAN__
64 /* If location in ".text" section swap value */
65 if ((unsigned int)offset_ptr_rom <
66 (unsigned int)&__ivt_end)
67 val = (val << 16) | (val >> 16);
70 /* Check that the target points into executable */
71 if (val >= (unsigned int)&__image_copy_start && val <=
72 (unsigned int)&__image_copy_end) {
74 #ifdef __LITTLE_ENDIAN__
75 /* If location in ".text" section swap value */
76 if ((unsigned int)offset_ptr_rom <
77 (unsigned int)&__ivt_end)
78 val = (val << 16) | (val >> 16);
80 memcpy(offset_ptr_ram, &val, sizeof(int));
83 last_offset = offset_ptr_rom;
85 } while (++re_src < re_end);