Diagnostic ACM (Type 3) Rules

Diagnostic ACM (Type 3) entry in the FIT is required only for platforms which support functional safety.

1. The address field points to a Diagnostic ACM. Specifically, the address field in the type 3 record points to the first byte of the ACM header.
2. Type 3 entry must point to an address that is accessible by the processor at reset vector and should be 4Kb aligned.
3. The C_​V bit in this entry should be clear.
4. The Size field is not used. BIOS should set this field to 0.
5. The Version field should be set to 0x0100.