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/*
* (C) Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <bootm.h>
#include <command.h>
#include <image.h>
#include <lmb.h>
#include <mapmem.h>
#include <linux/kernel.h>
#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
/* 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;
};
#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
static int booti_setup(bootm_headers_t *images)
{
struct Image_header *ih;
uint64_t dst;
uint64_t image_size, text_offset;
ih = (struct Image_header *)map_sysmem(images->ep, 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);
}
/*
* 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 (le64_to_cpu(ih->flags) & BIT(3))
dst = images->ep - text_offset;
else
dst = gd->bd->bi_dram[0].start;
dst = ALIGN(dst, SZ_2M) + text_offset;
unmap_sysmem(ih);
if (images->ep != dst) {
void *src;
debug("Moving Image from 0x%lx to 0x%llx\n", images->ep, dst);
src = (void *)images->ep;
images->ep = dst;
memmove((void *)dst, src, image_size);
}
return 0;
}
/*
* Image booting support
*/
static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[], bootm_headers_t *images)
{
int ret;
struct Image_header *ih;
ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
images, 1);
/* Setup Linux kernel Image entry point */
if (!argc) {
images->ep = load_addr;
debug("* kernel: default image load address = 0x%08lx\n",
load_addr);
} else {
images->ep = simple_strtoul(argv[0], NULL, 16);
debug("* kernel: cmdline image address = 0x%08lx\n",
images->ep);
}
ret = booti_setup(images);
if (ret != 0)
return 1;
ih = (struct Image_header *)map_sysmem(images->ep, 0);
lmb_reserve(&images->lmb, images->ep, le32_to_cpu(ih->image_size));
unmap_sysmem(ih);
/*
* Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
* have a header that provide this informaiton.
*/
if (bootm_find_images(flag, argc, argv))
return 1;
return 0;
}
int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int ret;
/* Consume 'booti' */
argc--; argv++;
if (booti_start(cmdtp, flag, argc, argv, &images))
return 1;
/*
* We are doing the BOOTM_STATE_LOADOS state ourselves, so must
* disable interrupts ourselves
*/
bootm_disable_interrupts();
images.os.os = IH_OS_LINUX;
images.os.arch = IH_ARCH_ARM64;
ret = do_bootm_states(cmdtp, flag, argc, argv,
#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
BOOTM_STATE_RAMDISK |
#endif
BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
BOOTM_STATE_OS_GO,
&images, 1);
return ret;
}
#ifdef CONFIG_SYS_LONGHELP
static char booti_help_text[] =
"[addr [initrd[:size]] [fdt]]\n"
" - boot arm64 Linux Image stored in memory\n"
"\tThe argument 'initrd' is optional and specifies the address\n"
"\tof an initrd in memory. The optional parameter ':size' allows\n"
"\tspecifying the size of a RAW initrd.\n"
#if defined(CONFIG_OF_LIBFDT)
"\tSince booting a Linux kernel requires a flat device-tree, a\n"
"\tthird argument providing the address of the device-tree blob\n"
"\tis required. To boot a kernel with a device-tree blob but\n"
"\twithout an initrd image, use a '-' for the initrd argument.\n"
#endif
"";
#endif
U_BOOT_CMD(
booti, CONFIG_SYS_MAXARGS, 1, do_booti,
"boot arm64 Linux Image image from memory", booti_help_text
);
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