Cbmem console

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Coreboot configuration

If your hardware supports early cbmem console you should see the following in "Console --->" after making make menuconfig

[*] Send console output to a CBMEM buffer
(0x10000) Room allocated for console output in CBMEM
(0xc00) Room allocated for console output in Cache as RAM

Else you may try to select the following configuration option in "General setup --->"

[*] The CBMEM space is dynamically grown.
Note that it can fails to compile if that is not supported either for your device.