Freescale / meta-freescale

Layer containing NXP hardware support metadata
Other
168 stars 254 forks source link

uuu_bootloader_tag.bbclass: Add UUU_BOOTLOADER_UNTAGGED #1762

Closed hiagofranco closed 6 months ago

hiagofranco commented 6 months ago

Add UUU_BOOTLOADER_UNTAGGED flag to add the possibility to deploy a imx-boot binary without the tagged footer 'UUUBURNXXOEUZX7+A-XY5601QQWWZ%sEN' at the end.

The addition of the footer 'UUUBURNXXOEUZX7+A-XY5601QQWWZ%sEN' at the end causes issues when the binary is loaded into RAM memory, this footer may cause issues where the binary size exceeds the typical USB package size used by UUU (1021 bytes).

As example, if the footer is split across two distinct USB packages, such as sending 'UUUBURNXXXOE' in the last packet and 'UZX7+A-XY5601QQWWZ%sEND' in the next one, it can lead to UUU halting while waiting for a response in SDPS mode.

After sending 'UUUBURNXXXOE', iMX8MP's boot room starts SPL, not waiting for the next packet ('UZX7+A-XY5601QQWWZ%sEND'), leading to UUU breaking.

Therefore, deploy both binaries separately (-tagged and -untagged) to allow users to choose the appropriate binary.

(cherry picked from commit 5a906365fd29) Signed-off-by: Hiago De Franco hiago.franco@toradex.com