On Mon, Feb 26, 2024 at 05:32:26PM +0100, Heinrich Schuchardt wrote:
U-Boot SPL loads the device-tree directly behind main U-Boot overlapping the .bss section. reserve_fdt() is called in board_init_f() to relocate the device-tree to a safe location.
Debug UARTs are enabled before board_init_f(). With sbi_dbcn_available in the .bss section the device-tree is corrupted when _debug_uart_init() is called in the SBI serial driver. Move the variable to the .data section.
Link: https://bugs.launchpad.net/ubuntu/+source/u-boot/+bug/2054091 Fixes: dfe08374943c ("risc-v: implement DBCN based debug console") Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com
This also appears to fix the inconsistent boot issues that I've been seeing since I reported: https://lore.kernel.org/u-boot/20240122-finicky-ancient-797ba048f927@spud/
Tested-by: Conor Dooley conor.dooley@microchip.com
Thanks, Conor.