It seems that newer builds of OpenWRT have a gzip kernel
larger than 2MB~, which for some reason fails to boot on this board.
However, we have 8MB of kernel space and currently the uncompressed
kernel is 6.5MB~, so we have some space to grow until a better
solution is worked out.
Before:
## Booting kernel from Legacy Image at ee840000 ...
Image Name: Linux-4.19.53
Created: 2019-06-22 11:17:48 UTC
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 2315724 Bytes = 2.2 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 02000000 ...
Image Name: OpenWrt fake ramdisk
Created: 2019-06-22 11:17:48 UTC
Image Type: PowerPC Linux RAMDisk Image (uncompressed)
Data Size: 0 Bytes = 0 kB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at ec000000
Booting using the fdt blob at 0xec000000
Uncompressing Kernel Image ... Error: Bad gzipped data
GUNZIP: uncompress, out-of-mem or overwrite error -
must RESET board to recover
Loading Ramdisk to 10000000, end 10000000 ... OK
Loading Device Tree to 00ffa000, end 00fffc78 ... OK
ft_fixup_l2cache: FDT_ERR_NOTFOUND
After:
## Booting kernel from Legacy Image at ee840000 ...
Image Name: POWERPC OpenWrt Linux-4.19.53
Created: 2019-06-22 11:17:48 UTC
Image Type: PowerPC Linux Kernel Image (uncompressed)
Data Size: 6724584 Bytes = 6.4 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 02000000 ...
Image Name: OpenWrt fake ramdisk
Created: 2019-06-22 11:17:48 UTC
Image Type: PowerPC Linux RAMDisk Image (uncompressed)
Data Size: 0 Bytes = 0 kB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at ec000000
Booting using the fdt blob at 0xec000000
Loading Kernel Image ... OK
OK
Loading Ramdisk to 10000000, end 10000000 ... OK
Loading Device Tree to 00ffa000, end 00fffc78 ... OK
Signed-off-by: Chris Blake <chrisrblake93@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [75 cpl limit]
Chris Blake
43b8e5b120