通过串口获取

系统启动时，在boot阶段会打印如下信息

Format: Log Type - Time(microsec) - Message - Optional Info
Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
S - QC_IMAGE_VERSION_STRING=BOOT.XXXX
S - IMAGE_VARIANT_STRING=MAATANAZA
S - OEM_IMAGE_VERSION_STRING=xxxxxx
S - Boot Interface: NAND
S - Secure Boot: On
S - Boot Config @ 0x000a602c = 0x000000a1
S - JTAG ID @ 0x000a607c = 0x001890e1
S - OEM ID @ 0x000a6080 = 0x00000000
S - Serial Number @ 0x000a4128 = 0x4536ab44
S - Feature Config Row 0 @ 0x000a4160 = 0x14000000000068c0
S - Feature Config Row 1 @ 0x000a4168 = 0x0342f80200000005
B -      3319 - PBL, Start
B -      6720 - bootable_media_detect_entry, Start
B -      7525 - bootable_media_detect_success, Start
B -      7530 - elf_loader_entry, Start
B -      9729 - auth_hash_seg_entry, Start
B