mkubootimage
—
create U-Boot loader image
mkubootimage |
[-h ] -A
(arm|arm64|i386|mips|mips64|or1k|powerpc|sh)
-a address
[-C (bz2|gz|lzma|lzo|none)]
[-E address]
[-e address]
[-f (arm64|uimg)] [-m
magic] -n
image [-O
(freebsd|linux|netbsd|openbsd)] -T
(fs|kernel|kernel_noload|ramdisk|standalone)
[-u ] source destination |
The mkubootimage
utility is used to create an image for
Das U-Boot, the “Universal Boot Loader”.
The arguments are as follows:
-A
(arm|arm64|i386|mips|mips64|or1k|powerpc|sh)
- Defines the architecture. This is required for “uimg” format
images.
-a
address
- Sets the image load address. This is an integer between 0 and
UINT32_MAX
. This is required for all
“uimg” image types except for script, ramdisk, and
kernel_noload.
-C
(bz2|gz|lzma|lzo|none)
- Defines the compression. The default is “none”.
-E
address
- Define the entry point. This is an integer between 0 and
UINT32_MAX
. This option is the same as
-e
but it inverts the bytes to convert the 32 bit
integer from little to big endian (or vice versa). If
-E
or -e
are not set, the
entry point defaults to the image load address
(-a
).
-e
address
- Define the entry point. This is an integer between 0 and
UINT32_MAX
. If -E
or
-e
are not set, the entry point defaults to the
image load address (-a
).
-f
(arm64|uimg)
- Defines the output image format type. The default is
“uimg”.
-h
- Display the usage and exit.
-m
magic
- Set the magic used for “uimg” format images. This is an
integer between 0 and
UINT32_MAX
. The default is
“0x27051956”.
-n
image
- Defines the image name. This is required.
-O
(freebsd|linux|netbsd|openbsd)
- Defines the operating system type. The default OS name is
“netbsd”.
-T
(fs|kernel|kernel_noload|ramdisk|standalone|script)
- Defines the image type. This is required for “uimg” format
images.
-u
- Update the header in an existing file instead of creating a new one.
The required source argument is the filename
of the kernel that is read. The required destination
argument is the filename of the image file that is created.
mkubootimage
returns 1 on failure to read the kernel,
generate a header, or create the image.
Before the image is written, the header is displayed to standard out; for
example:
magic: 0x27051956
time: Tue Jun 7 15:58:41 2011
size: 2482203
load addr: 0x00020000
entry point: 0x00020000
data crc: 0x700fdf53
os: 2 (netbsd)
arch: 7 (powerpc)
type: 2 (kernel)
comp: 1 (gz)
name: NetBSD/evbppc 5.99.52 (INSTALL_PMPPC)
header crc: 0x94ea96cf
“Das U-Boot - the Universal Boot Loader”
http://www.denx.de/wiki/U-Boot/
The mkubootimage
command first appeared in
NetBSD 6.0.
The mkubootimage
utility was originally written by
Jared McNeill. This manual page was written by
Jeremy C. Reed.