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03de305ec4
As part of bringing the master branch back in to next, we need to allow for all of these changes to exist here. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <image.h>
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#include <mapmem.h>
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#include <asm/global_data.h>
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#include <linux/bitops.h>
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#include <linux/sizes.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
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/* See Documentation/arm64/booting.txt in the Linux kernel */
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struct Image_header {
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uint32_t code0; /* Executable code */
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uint32_t code1; /* Executable code */
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uint64_t text_offset; /* Image load offset, LE */
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uint64_t image_size; /* Effective Image size, LE */
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uint64_t flags; /* Kernel flags, LE */
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uint64_t res2; /* reserved */
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uint64_t res3; /* reserved */
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uint64_t res4; /* reserved */
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uint32_t magic; /* Magic number */
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uint32_t res5;
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};
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int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
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bool force_reloc)
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{
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struct Image_header *ih;
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uint64_t dst;
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uint64_t image_size, text_offset;
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*relocated_addr = image;
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ih = (struct Image_header *)map_sysmem(image, 0);
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if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
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puts("Bad Linux ARM64 Image magic!\n");
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return 1;
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}
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/*
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* Prior to Linux commit a2c1d73b94ed, the text_offset field
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* is of unknown endianness. In these cases, the image_size
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* field is zero, and we can assume a fixed value of 0x80000.
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*/
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if (ih->image_size == 0) {
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puts("Image lacks image_size field, assuming 16MiB\n");
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image_size = 16 << 20;
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text_offset = 0x80000;
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} else {
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image_size = le64_to_cpu(ih->image_size);
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text_offset = le64_to_cpu(ih->text_offset);
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}
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*size = image_size;
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/*
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* If bit 3 of the flags field is set, the 2MB aligned base of the
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* kernel image can be anywhere in physical memory, so respect
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* images->ep. Otherwise, relocate the image to the base of RAM
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* since memory below it is not accessible via the linear mapping.
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*/
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if (!force_reloc && (le64_to_cpu(ih->flags) & BIT(3)))
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dst = image - text_offset;
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else
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dst = gd->bd->bi_dram[0].start;
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*relocated_addr = ALIGN(dst, SZ_2M) + text_offset;
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unmap_sysmem(ih);
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return 0;
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}
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