The RTL931x devices have an other register that describes the
current RAM configuration. Enhance the identification routine.
Tested on LGS352C (RTL9311).
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19284
Signed-off-by: Robert Marko <robimarko@gmail.com>
Until now the rt-loader only works on U-Boot driven devices where the
environment (e.g. coprocessor) is usually setup properly. Devices like
the ZyXEL GS1920 series use BootBase as start environment and skip
some of the basic initialization steps. rt-loader will fail in these
cases. Take care about the CP0 registers.
Additionally enhance the documentation of the printf implementation.
It was optimized during the different revisions of the initial PR.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19253
Signed-off-by: Robert Marko <robimarko@gmail.com>
The bootloader of many Realtek switches only supports gzipped kernel images.
With limited flash space that might get critical in future versions. For better
compression allow support for compressed images. For this a new loader was
developed. Several ideas have been taken over from the existing lzma loader
but this has been enhanced to make integration simpler. What is new:
- Loader is position independent. No need to define load addresses
- Loader identifies device memory on its own
- Loader uses "official" upstream kernel lzma uncompress
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/decompress_unlzma.c
- Loader uses "official" UNMODIFIED nanoprintg that is used by several
bare metal projects. https://github.com/charlesnicholson/nanoprintf
Compiled the loader ist just under 12KiB and during boot it will show:
rt-loader
Found RTL8380M (chip id 6275C) with 256MB
Relocate 2924240 bytes from 0x80100000 to 0x8fce0000
Extract kernel with 2900144 bytes from 0x8fce521c to 0x80100000...
Extracted kernel size is 9814907 bytes
Booting kernel from 0x80100000 ...
[ 0.000000] Linux version 6.12.33 ...
[ 0.000000] RTL838X model is 83806800
...
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/18397
Signed-off-by: Robert Marko <robimarko@gmail.com>
