| # meta-fvp-base |
| |
| This layer contains a reference implementation of OpenBMC for Armv-A Base RevC AEM FVP. |
| |
| The image can be used for the following demonstration setup |
| where the Base FVP represents the management controller which is communicating |
| with the Manageability Control Processor (MCP) over PLDM over MCTP over UART. |
| |
| ## Diagram |
| |
| ``` |
| AP debug console |
| | |
| +---------------------+ |
| | Neoverse RD-N2 FVP | |
| | | PLDM over |
| +-----+ +-------+ MCTP over +--------------------------+ |
| | SCP | | MCP | (terminal_0) ------- UART ----- (terminal_1)| /dev/ttyAMA1 Base FVP |--- redfish |
| +-----+-------+-------+ +--------------------------+ |
| | | | |
| | debug console FVP debug console |
| | (terminal_uart_mcp) (terminal_0) |
| debug console |
| (terminal_uart_scp) |
| ``` |
| |
| ## Features |
| |
| - The MCP exposes a temperature sensor which our image then exposes over redfish |
| - pldmd should automatically pick up this sensor and expose it on dbus |
| - The MCP has a PLDM Event which can be retrieved by pldmd upon using ```pldm event``` command from MCP debug console |
| |
| ## Usage |
| |
| 1. Start Base FVP with OpenBMC Image |
| - ```./meta-arm/scripts/runfvp build/fvp/tmp/deploy/images/fvp/obmc-phosphor-image-fvp.fvpconf``` |
| - The serial /dev/ttyAMA1 will be automatically configured |
| - pldmd will find ```/usr/share/pldm/host_eid``` which is hardcoded as 18 |
| - pldmd will start communicating with the MCP once it's ready |
| 2. Start Neoverse RD-N2 FVP |
| - Can observe SCP FW logs on MCP debug console |
| - Can enter MCP Debug Prompt by pressing Ctrl+e on MCP debug console |
| 3. Connect the UART's of MCP to Base FVP with |
| ```socat -x tcp:localhost:6005 tcp:localhost:5065``` |
| - The port numbers are just examples, they can be hardcoded in fvp config, otherwise the fvp's will assign them dynamically |
| - ```-x``` tells socat to print the bytes being transferred |
| 4. Query Redfish Sensor and Event |
| - ```curl --insecure -u root:0penBmc -X GET https://127.0.0.1:4223/redfish/v1/Chassis/PLDM_Device_1/Thermal``` |
| - ```curl --insecure -u root:0penBmc -X GET https://127.0.0.1:4223/redfish/v1/Systems/system/LogServices/PldmEvent/Entries/``` |
| |
| ## Known Issues |
| - Because both FVP are running independently, there can be an issue with timeout. |
| That's why a large timeout was configured for pldmd. |
| |
| ## References |
| |
| - SCP FW for MCP https://gitlab.arm.com/firmware/SCP-firmware |
| - Base FVP Download https://developer.arm.com/Tools%20and%20Software/Fixed%20Virtual%20Platforms |
| - Neoverse FVP Download https://developer.arm.com/downloads/-/arm-ecosystem-fvps |
| - PLDM + MCTP Specifications https://www.dmtf.org/standards/pmci |
| - Neoverse System Architecture https://developer.arm.com/documentation/102759/relc/Hardware-and-topology/System-architecture?lang=en |
| - Other FVP SW Docs https://gitlab.arm.com/arm-reference-solutions/arm-reference-solutions-docs/ |
