skiboot: Add opal calls to init/start/stop IMC devices

Add new opal calls to init, start and stop the IMC nest/core units.
To initialize the core IMC counters, it takes a physical address per
core as an input and writes that address to PDBAR[14:50] bits.
It initializes the htm_mode and event_mask, where it selects the time
interval at which the counter values must be posted to the given memory
location and enables the counters to start running by setting the
appropriate bits.

To disable/enable the nest IMC counters (stop or resume counting),
writes into "command" field of the nest control block in the reserve
memory location. To disable/enable the core IMC counters (stop or
resume counting), writes into appropriate bits of htm_mode to
disable the counters.

Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: use pr_fmt rather than hardcode IMC prefix]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

0 files changed, 0 insertions, 0 deletions