NAME¶
mkimage - Generate image for U-Boot
SYNOPSIS¶
mkimage [
options]
DESCRIPTION¶
The
mkimage command is used to create images for use with the U-Boot boot
loader. These images can contain the linux kernel, device tree blob, root file
system image, firmware images etc., either separate or combined.
mkimage supports two different formats:
The old
legacy image format concatenates the individual parts (for
example, kernel image, device tree blob and ramdisk image) and adds a 64 bytes
header containing information about target architecture, operating system,
image type, compression method, entry points, time stamp, checksums, etc.
The new
FIT (Flattened Image Tree) format allows for more flexibility in
handling images of various types and also enhances integrity protection of
images with stronger checksums.
OPTIONS¶
List image information:
- -l [uimage file name]
- mkimage lists the information contained in the header of an
existing U-Boot image.
Create old legacy image:
- -A [architecture]
- Set architecture. Pass -h as the architecture to see the
list of supported architectures.
- -O [os]
- Set operating system. bootm command of u-boot changes boot
method by os type. Pass -h as the OS to see the list of supported OS.
- -T [image type]
- Set image type. Pass -h as the image to see the list of
supported image type.
- -C [compression type]
- Set compression type. Pass -h as the compression to see the
list of supported compression type.
- -a [load addess]
- Set load address with a hex number.
- -e [entry point]
- Set entry point with a hex number.
- -n [image name]
- Set image name to 'image name'.
- -d [image data file]
- Use image data from 'image data file'.
- -x
- Set XIP (execute in place) flag.
Create FIT image:
- -D [dtc options]
- Provide special options to the device tree compiler that is
used to create the image.
- -f [image tree source file]
- Image tree source file that describes the structure and
contents of the FIT image.
EXAMPLES¶
List image information:
mkimage -l uImage
Create legacy image with compressed PowerPC Linux kernel:
mkimage -A powerpc -O linux -T kernel -C gzip \
-a 0 -e 0 -n Linux -d vmlinux.gz uImage
Create FIT image with compressed PowerPC Linux kernel:
mkimage -f kernel.its kernel.itb
HOMEPAGE¶
http://www.denx.de/wiki/U-Boot/WebHome
AUTHOR¶
This manual page was written by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
and Wolfgang Denk <wd@denx.de>
