mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-10 04:03:46 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
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*/
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#include <common.h>
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#include <elf.h>
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#include <asm-generic/sections.h>
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extern ulong __image_copy_start;
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extern ulong __ivt_end;
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DECLARE_GLOBAL_DATA_PTR;
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int copy_uboot_to_ram(void)
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{
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size_t len = (size_t)&__image_copy_end - (size_t)&__image_copy_start;
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if (gd->flags & GD_FLG_SKIP_RELOC)
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return 0;
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memcpy((void *)gd->relocaddr, (void *)&__image_copy_start, len);
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return 0;
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}
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int clear_bss(void)
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{
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ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
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size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
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memset((void *)dst_addr, 0x00, len);
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return 0;
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}
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/*
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* Base functionality is taken from x86 version with added ARC-specifics
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*/
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int do_elf_reloc_fixups(void)
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{
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Elf32_Rela *re_src = (Elf32_Rela *)(&__rel_dyn_start);
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Elf32_Rela *re_end = (Elf32_Rela *)(&__rel_dyn_end);
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if (gd->flags & GD_FLG_SKIP_RELOC)
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return 0;
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debug("Section .rela.dyn is located at %08x-%08x\n",
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(unsigned int)re_src, (unsigned int)re_end);
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Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
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Elf32_Addr *offset_ptr_ram;
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do {
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/* Get the location from the relocation entry */
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offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
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/* Check that the location of the relocation is in .text */
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if (offset_ptr_rom >= (Elf32_Addr *)&__image_copy_start &&
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offset_ptr_rom > last_offset) {
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unsigned int val;
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/* Switch to the in-RAM version */
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offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
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gd->reloc_off);
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debug("Patching value @ %08x (relocated to %08x)\n",
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(unsigned int)offset_ptr_rom,
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(unsigned int)offset_ptr_ram);
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/*
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* Use "memcpy" because target location might be
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* 16-bit aligned on ARC so we may need to read
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* byte-by-byte. On attempt to read entire word by
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* CPU throws an exception
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*/
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memcpy(&val, offset_ptr_ram, sizeof(int));
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#ifdef __LITTLE_ENDIAN__
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/* If location in ".text" section swap value */
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if ((unsigned int)offset_ptr_rom <
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(unsigned int)&__ivt_end)
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val = (val << 16) | (val >> 16);
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#endif
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/* Check that the target points into executable */
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if (val >= (unsigned int)&__image_copy_start && val <=
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(unsigned int)&__image_copy_end) {
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val += gd->reloc_off;
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#ifdef __LITTLE_ENDIAN__
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/* If location in ".text" section swap value */
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if ((unsigned int)offset_ptr_rom <
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(unsigned int)&__ivt_end)
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val = (val << 16) | (val >> 16);
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#endif
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memcpy(offset_ptr_ram, &val, sizeof(int));
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}
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}
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last_offset = offset_ptr_rom;
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} while (++re_src < re_end);
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return 0;
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}
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