This change adds function to invoke for MISC_CCPLEX ARI calls and
the corresponding smc handler. This can be used to enable/disable
Coresight clock gating.
Change-Id: I4bc17aa478a46c29bfe17fd74f839a383ee2b644
Signed-off-by: Krishna Sitaraman <ksitaraman@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This patch clears the unused or reserved ARI input registers
before issuing the actual ARI command.
Change-Id: I454b86566bfe088049a5c63527c1323d7b25248a
Signed-off-by: Krishna Sitaraman <ksitaraman@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Uncore perfmon appears to the CPU as a set of uncore perfmon registers
which can be read and written using the ARI interface. The MCE code
sequence handles reads and writes to these registers by manipulating
the underlying T186 uncore hardware.
To access an uncore perfmon register, CPU software writes the ARI
request registers to specify
* whether the operation is a read or a write,
* which uncore perfmon register to access,
* the uncore perfmon unit, group, and counter number (if necessary),
* the data to write (if the operation is a write).
It then initiates an ARI request to run the uncore perfmon sequence in
the MCE and reads the resulting value of the uncore perfmon register
and any status information from the ARI response registers.
The NS world's MCE driver issues MCE_CMD_UNCORE_PERFMON_REQ command
for the EL3 layer to start the entire sequence. Once the request
completes, the NS world would receive the command status in the X0
register and the command data in the X1 register.
Change-Id: I20bf2eca2385f7c8baa81e9445617ae711ecceea
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
The CPU Complex (CCPLEX) Power Manager (Denver MCE, or DMCE) is an
offload engine for BPMP to do voltage related sequencing and for
hardware requests to be handled in a better latency than BPMP-firmware.
There are two interfaces to the MCEs - Abstract Request Interface (ARI)
and the traditional NVGINDEX/NVGDATA interface.
MCE supports various commands which can be used by CPUs - ARM as well
as Denver, for power management and reset functionality. Since the
linux kernel is the master for all these scenarios, each MCE command
can be issued by a corresponding SMC. These SMCs have been moved to
SiP SMC space as they are specific to the Tegra186 SoC.
Change-Id: I67bee83d2289a8ab63bc5556e5744e5043803e51
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Krishna Sitaraman
Varun Wadekar