1755af102SChris Cain# OpenPOWER OCC Control Service 2755af102SChris Cain 3755af102SChris CainThis service will handle communications to the On-Chip Controller (OCC) on Power 4755af102SChris Cainprocessors. The OCC provides processor and memory temperatures, power readings, 5755af102SChris Cainpower cap support, system power mode support, and idle power saver support. OCC 6755af102SChris CainControl will be interfacing with the OCC to collect the temperatures and power 7755af102SChris Cainreadings, updating the system power mode, setting power caps, and idle power 8755af102SChris Cainsave parameters. 9755af102SChris Cain 10755af102SChris CainThe service is started automatically when the BMC is started. 11755af102SChris Cain 12755af102SChris Cain## Build Project 13755af102SChris Cain 14755af102SChris CainThis project can be built with meson. The typical meson workflow is: meson 15755af102SChris Cainbuilddir && ninja -C builddir. 16755af102SChris Cain 17755af102SChris Cain## Server 18755af102SChris Cain 19755af102SChris CainThe server will start automatically after BMC is powered on. 20755af102SChris Cain 21755af102SChris CainServer status: `systemctl status org.open_power.OCC.Control.service` 22755af102SChris Cain 23755af102SChris CainTo restart the service: `systemctl restart org.open_power.OCC.Control.service` 24755af102SChris Cain 25755af102SChris Cain## Configuration 26755af102SChris Cain 27755af102SChris CainService files are located in service_files subdirectory. 28755af102SChris Cain 29755af102SChris Cain## References 30755af102SChris Cain 31755af102SChris Cain### Power10 32755af102SChris Cain 33755af102SChris CainIBM EnergyScale for Power10 Processor-Based Systems whitepaper: 34*32f2af0aSChris Cain<https://www.ibm.com/downloads/cas/E7RL9N4E> 35755af102SChris Cain 36755af102SChris CainOCC Firmware Interface Spec for Power10: 37*32f2af0aSChris Cain<https://github.com/open-power/docs/blob/P10/occ/OCC_P10_FW_Interfaces_v1_17.pdf> 38755af102SChris Cain 39*32f2af0aSChris CainOCC Firmware: <https://github.com/open-power/occ/tree/master-p10> 40755af102SChris Cain 41755af102SChris Cain### Power9 42755af102SChris Cain 43755af102SChris CainIBM EnergyScale for POWER9 Processor-Based Systems: 44*32f2af0aSChris Cain<https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?htmlfid=49019149USEN&> 45755af102SChris Cain 46755af102SChris CainOCC Firmware Interface Spec for POWER9: 47*32f2af0aSChris Cain<https://github.com/open-power/docs/blob/P9/occ/OCC_P9_FW_Interfaces.pdf> 48