Hi,
In fact I was thinking that we can add custom "OEMx" tables to ACPI and dump
them using acpi tools. I mean we can add the hooks to ACPI so cbmem stuff is
available per table in ACPI.
The AMD chipsets needs to use NVRAM because there is stored DQS driving values
for memory controller. Also the cbmem address is stored there because one cannot
find it very easily if there is frambuffer (and on AMD all access is uncached
that time). This NVRAM is not CMOS it is just 256 bytes of storage which
survives S3 state.
Thanks,
Rudolf
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