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ce19571004
This device has trouble extracting big kernel from flash,
and supports LZMA compressed kernels only.
Using OpenWrt kernel loader saves us 64 KB compared to the dictionary
size limiting workaround.
Factory image sizes (commit: 5f126c541a74) with "CONFIG_ALL_KMODS=y":
- original ("-d23", default): 4784188 bytes, LZMA ERROR 1
- with "-d19": 4915260, LZMA ERROR 1
- with "-d18": 4915260, diff to original: +128 KB
- with "-d17": 4980796, diff to original: +192 KB
- with this patch: 4849724, diff to original: +64 KB
To save some CPU cycle, use minimal compression ("-a0") for the LZMA
compressed uImage.
The most robust solution would use a different loader,
which reads the compressed kernel directly from the flash.
See the thread at [0] for more details!
[0] http://lists.infradead.org/pipermail/openwrt-devel/2020-April/022926.html
Signed-off-by: Szabolcs Hubai <szab.hu@gmail.com>
Tested-by: Stijn Segers <foss@volatilesystems.org>
[fixed identation]
Signed-off-by: David Bauer <mail@david-bauer.net>
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
This is the buildsystem for the OpenWrt Linux distribution.
To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.
You need gcc, binutils, bzip2, flex, python3.5+, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.
1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default
2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/
3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.
4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.
Sunshine!
Your OpenWrt Community
http://www.openwrt.org