[coreboot] Intel Baytrail E3845 Coreboot - Not booting after modifying CMOS boot_option

Mohan Shanmuga Sundaram mohan.sundaram at aricent.com
Thu Oct 13 09:14:08 CEST 2016

Dear Coreboot Community!
I have modified the following CMOS option table bit using 'nvramtool' utility from Ubuntu:
384          1       e       4        boot_option

Its default value was 'Normal', which I modified to 'Fallback'. After rebooting, the coreboot seems to be not loading the default payload.
In what way I can recover it?
Where does the CMOS modification resides?

I have redone the coreboot.rom flashing completely, yet the coreboot didn't load the default payload. The following is my CBFS:
Performing operation on 'COREBOOT' region...
Name                           Offset     Type         Size
cbfs master header             0x0        cbfs header  32
fallback/romstage              0x80       stage        30868
cpu_microcode_blob.bin         0x7980     microcode    208896
fallback/ramstage              0x3aa00    stage        51629
config                         0x47400    raw          749
revision                       0x47740    raw          575
cmos_layout.bin                0x479c0    cmos_layout  1212
pci8086,0f31.rom               0x47ec0    optionrom    65536
fallback/dsdt.aml              0x57f40    raw          12527
fallback/payload               0x5b080    payload      61165
payload_config                 0x69fc0    raw          1563
payload_revision               0x6a640    raw          243
(empty)                        0x6a780    null         1333016
fsp.bin                        0x1afec0   fsp          294912
(empty)                        0x1f7f00   null         30168
bootblock                      0x1ff500   bootblock    2480


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