使用 U-Boot 日志进行故障排查

U-Boot <version> (<date>)

Model: Qualcomm <board-name>
DRAM:  6 GiB
Core:  296 devices, 31 uclasses, devicetree: separate
MMC:   2
Loading Environment from <storage>...
In:    serial,button-kbd
Out:   serial,vidconsole
Err:   serial,vidconsole
Model: Qualcomm Technologies, Inc. <board-name>
Net:   No ethernet found.

Hit any key to stop autoboot: 0
Scanning for bootflows in all bootdevs
Seq  Method       State   Uclass    Part  Name                      Filename
---  -----------  ------  --------  ----  ------------------------  ----------------
Scanning global bootmeth 'efi_mgr':
  0  efi_mgr      ready   (none)       0  <>
** Booting bootflow '<>' with efi_mgr