On Mon, Jun 22, 2015 at 08:10:27PM -0300, Paulo Alcantara wrote:
This interface provides some registers within a
32-byte range and can be
acessed through PCI-to-LPC bridge interface (PMBASE + 0x60).
It's commonly used as a watchdog timer to detect system lockups through
SMIs that are generated -- if TCO_EN bit is set -- on every timeout. If
NO_REBOOT bit is not set in GCS (General Control and Status register),
the system will be resetted upon second timeout if TCO_RLD register
wasn't previously written to prevent timeout.
This patch adds support to TCO watchdog logic and few other features
like mapping NMIs to SMIs (NMI2SMI_EN bit), system intruder detection,
etc. are not implemented yet.
Signed-off-by: Paulo Alcantara <pcacjr(a)zytor.com>
One useful feature to implement could be ability to set the NO_REBOOT
strapping pin to 1. And maybe it's even a better default - will have
to experiment with this feature some more.
Does not have to block this patchset, can be done by a patch on top.