opal: Inform fsp about the topology switch.

After the topology switch, we may have a non-functional backup topology.
This means, we won't be able to recover from future TOD errors that
requires topology switch. Someone needs to either fix it OR configure
new functional backup topology.

Bit 18 of the Pervasive local FIR (SCOM: EH.TPCHIP.TPC.LOCAL_FIR: 0x0104000C)
is used to signal that TOD error analysis needs to be performed. This
allows FSP/PRD to investigate and re-configure new backup topology if
required. Once new backup topology is configured and ready, FSP sends a
mailbox command xE6, s/c 0x06, mod 0, to enable the backup topology.

This isn't documented anywhere. This info is provided by FSP folks.

This patch implements setting of bit 18 in Pervasive local FIR. The next
patch will handle FSP mailbox command xE6, s/c 0x06, mod 0.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

0 files changed, 0 insertions, 0 deletions