1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2009
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 #include <linux/sizes.h>
11 DECLARE_GLOBAL_DATA_PTR;
13 #define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
15 /* See Documentation/arm64/booting.txt in the Linux kernel */
17 uint32_t code0; /* Executable code */
18 uint32_t code1; /* Executable code */
19 uint64_t text_offset; /* Image load offset, LE */
20 uint64_t image_size; /* Effective Image size, LE */
21 uint64_t flags; /* Kernel flags, LE */
22 uint64_t res2; /* reserved */
23 uint64_t res3; /* reserved */
24 uint64_t res4; /* reserved */
25 uint32_t magic; /* Magic number */
29 int booti_setup(ulong image, ulong *relocated_addr, ulong *size)
31 struct Image_header *ih;
33 uint64_t image_size, text_offset;
35 *relocated_addr = image;
37 ih = (struct Image_header *)map_sysmem(image, 0);
39 if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
40 puts("Bad Linux ARM64 Image magic!\n");
45 * Prior to Linux commit a2c1d73b94ed, the text_offset field
46 * is of unknown endianness. In these cases, the image_size
47 * field is zero, and we can assume a fixed value of 0x80000.
49 if (ih->image_size == 0) {
50 puts("Image lacks image_size field, assuming 16MiB\n");
51 image_size = 16 << 20;
52 text_offset = 0x80000;
54 image_size = le64_to_cpu(ih->image_size);
55 text_offset = le64_to_cpu(ih->text_offset);
61 * If bit 3 of the flags field is set, the 2MB aligned base of the
62 * kernel image can be anywhere in physical memory, so respect
63 * images->ep. Otherwise, relocate the image to the base of RAM
64 * since memory below it is not accessible via the linear mapping.
66 if (le64_to_cpu(ih->flags) & BIT(3))
67 dst = image - text_offset;
69 dst = gd->bd->bi_dram[0].start;
71 *relocated_addr = ALIGN(dst, SZ_2M) + text_offset;