U-boot doesn't output bootscript logs, which makes it hard to debug.
Put bootscript to prebootscript section. Preboot is executed before
boot, and u-boot displays it's logs.
Device uses mainline kernel. What works:
- boots
- pstore log
- simple framebuffer
- storage including sdcard
* payload mock device tree:
Payload mock device tree is needed to mock device tree,
when we're overriding linux with u-boot in android boot image.
Stock bootloader needs this dtb appended to gzipped u-boot.
Bootscript is a simple hush shell script, dedicated to boot OS.
It may be customized to implement dual boot or to change kernel
command line.
