The wiki is being retired!
Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
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