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