Google Coral ChromeBook issue - flashrom

25 Jan 2019


      Hi There,
I have an issue that cannot disable write protection mode on a dell chomebook which FW  is Google_Coral_10068.63.0.
Both BIOS and EC flash ROM were reprogrammed with brand new chips before we installed the RMA shim R69.
1.      flashrom -p host -wp-disable      (AC only, Battery is disconnected)
coreboot table found at 0x7ab36000.
FAILED
[cid:image002.png@01D4B497.AC197D40]
2.      fmap_decode  readbios.bin
fmap_signature="0x5f5f464d41505f5f" fmap_ver_major="1" fmap_ver_minor="1" fmap_base="0x0000000000000000" fmap_size="0x1000000" fmap_name="FLASH" fmap_nareas="35"
area_offset="0x00000000" area_size="0x00400000" area_name="WP_RO" area_flags_raw="0x00" area_flags=""
area_offset="0x00000000" area_size="0x00001000" area_name="SI_DESC" area_flags_raw="0x00" area_flags=""
area_offset="0x00001000" area_size="0x001ff000" area_name="IFWI" area_flags_raw="0x00" area_flags=""
area_offset="0x00200000" area_size="0x00004000" area_name="RO_VPD" area_flags_raw="0x00" area_flags=""
area_offset="0x00204000" area_size="0x001fc000" area_name="RO_SECTION" area_flags_raw="0x00" area_flags=""
area_offset="0x00204000" area_size="0x00000800" area_name="FMAP" area_flags_raw="0x00" area_flags=""
area_offset="0x00204800" area_size="0x00000040" area_name="RO_FRID" area_flags_raw="0x00" area_flags=""
area_offset="0x00204840" area_size="0x000007c0" area_name="RO_FRID_PAD" area_flags_raw="0x00" area_flags=""
area_offset="0x00205000" area_size="0x0017b000" area_name="COREBOOT" area_flags_raw="0x00" area_flags=""
area_offset="0x00380000" area_size="0x00040000" area_name="GBB" area_flags_raw="0x00" area_flags=""
area_offset="0x003c0000" area_size="0x00040000" area_name="RO_UNUSED" area_flags_raw="0x00" area_flags=""
area_offset="0x00400000" area_size="0x00030000" area_name="MISC_RW" area_flags_raw="0x00" area_flags=""
area_offset="0x00400000" area_size="0x00021000" area_name="UNIFIED_MRC_CACHE" area_flags_raw="0x00" area_flags=""
area_offset="0x00400000" area_size="0x00010000" area_name="RECOVERY_MRC_CACHE" area_flags_raw="0x00" area_flags=""
area_offset="0x00410000" area_size="0x00010000" area_name="RW_MRC_CACHE" area_flags_raw="0x00" area_flags=""
area_offset="0x00420000" area_size="0x00001000" area_name="RW_VAR_MRC_CACHE" area_flags_raw="0x00" area_flags=""
area_offset="0x00421000" area_size="0x00003000" area_name="RW_ELOG" area_flags_raw="0x00" area_flags=""
area_offset="0x00424000" area_size="0x00004000" area_name="RW_SHARED" area_flags_raw="0x00" area_flags=""
area_offset="0x00424000" area_size="0x00002000" area_name="SHARED_DATA" area_flags_raw="0x00" area_flags=""
area_offset="0x00426000" area_size="0x00002000" area_name="VBLOCK_DEV" area_flags_raw="0x00" area_flags=""
area_offset="0x00428000" area_size="0x00002000" area_name="RW_VPD" area_flags_raw="0x00" area_flags=""
area_offset="0x0042a000" area_size="0x00005000" area_name="RW_NVRAM" area_flags_raw="0x00" area_flags=""
area_offset="0x0042f000" area_size="0x00001000" area_name="FPF_STATUS" area_flags_raw="0x00" area_flags=""
area_offset="0x00430000" area_size="0x00480000" area_name="RW_SECTION_A" area_flags_raw="0x00" area_flags=""
area_offset="0x00430000" area_size="0x00010000" area_name="VBLOCK_A" area_flags_raw="0x00" area_flags=""
area_offset="0x00440000" area_size="0x0046ffc0" area_name="FW_MAIN_A" area_flags_raw="0x00" area_flags=""
area_offset="0x008affc0" area_size="0x00000040" area_name="RW_FWID_A" area_flags_raw="0x00" area_flags=""
area_offset="0x008b0000" area_size="0x00480000" area_name="RW_SECTION_B" area_flags_raw="0x00" area_flags=""
area_offset="0x008b0000" area_size="0x00010000" area_name="VBLOCK_B" area_flags_raw="0x00" area_flags=""
area_offset="0x008c0000" area_size="0x0046ffc0" area_name="FW_MAIN_B" area_flags_raw="0x00" area_flags=""
area_offset="0x00d2ffc0" area_size="0x00000040" area_name="RW_FWID_B" area_flags_raw="0x00" area_flags=""
area_offset="0x00d30000" area_size="0x00200000" area_name="RW_LEGACY" area_flags_raw="0x00" area_flags=""
area_offset="0x00f30000" area_size="0x0004f000" area_name="BIOS_UNUSABLE" area_flags_raw="0x00" area_flags=""
area_offset="0x00f7f000" area_size="0x00080000" area_name="DEVICE_EXTENSION" area_flags_raw="0x00" area_flags=""
area_offset="0x00fff000" area_size="0x00001000" area_name="UNUSED_HOLE" area_flags_raw="0x00" area_flags=""
3.      flashrom -p host -w  bios.bin
Calibrating delay loop... OK.
coreboot table found at 0x7ab36000.
Erasing and writing flash chip... Good. It seems nothing was changed.
FAILED
[cid:image003.png@01D4B497.AC197D40]
Yuehui(Bank) Wu
Testing Engineer
MLB Engineering
CSAT Solutions LP
Work:  +1 (713) 934-5200
Mobile:  +1 (832) 729-1686
www.csat-solutions.comhttp://www.csat-solutions.com/
Bank.Wu@csat-solutions.commailto:bank.wu@csat-solutions.com
[cid:image001.png@01D16F22.E9FCB900]