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- @startuml
- skinparam ParticipantPadding 10
- skinparam BoxPadding 10
- box RSE
- participant RSE_BL1_1
- participant RSE_BL1_2
- participant RSE_BL2
- participant RSE_S
- endbox
- box SCP
- participant SCP_BL1
- endbox
- box AP
- participant AP_BL1
- participant AP_BL2
- participant AP_BL31
- endbox
- == RSE Boot phase ==
- -> RSE_BL1_1: Reset
- Rnote over RSE_BL1_1: ROM code, XIP
- Rnote over RSE_BL1_2: OTP code, XIP
- Rnote over RSE_BL2, AP_BL31: Stored in flash, loaded and executed in RAM
- activate RSE_BL1_1 #Green
- RSE_BL1_1 -->> RSE_BL1_2: Validate, measure
- Rnote over RSE_BL1_1: BL1_2 measurement\n\ saved to a shared buffer
- RSE_BL1_1 -> RSE_BL1_2: Pass execution
- deactivate RSE_BL1_1
- activate RSE_BL1_2 #Green
- RSE_BL1_2 -->> RSE_BL2: Validate, measure, load
- Rnote over RSE_BL1_2: RSE_BL2 measurement\n\ saved to a shared buffer
- RSE_BL1_2 -> RSE_BL2: Pass execution
- deactivate RSE_BL1_2
- activate RSE_BL2 #Green
- RSE_BL2 -->> RSE_S: Validate, measure, load
- RSE_BL2 -->> SCP_BL1: Validate, measure, load
- Rnote over RSE_BL2: RSE_S and SCP_BL1\n\ measurements saved\n\ to a shared buffer
- RSE_BL2 -> SCP_BL1: Release from reset
- activate SCP_BL1 #Green
- Rnote over RSE_BL2, SCP_BL1: MHU init between RSE and SCP
- Rnote over SCP_BL1: Configure memory
- Rnote over RSE_BL2: Waits for SCP
- SCP_BL1 --> RSE_BL2: Done
- RSE_BL2 -->> AP_BL1: Validate, measure, load
- Rnote over RSE_BL2: AP_BL1 measurement\n\ saved to a shared buffer
- RSE_BL2 -> AP_BL1: Release from reset
- activate AP_BL1 #Green
- RSE_BL2 -> RSE_S: Pass execution
- deactivate RSE_BL2
- activate RSE_S #Green
- Rnote over RSE_S: Measurements read from\n\ shared buffer and saved by\n\
- Measured Boot service to\n\ measurement slots.
- == RSE Runtime / AP Boot phase ==
- Rnote over RSE_S, AP_BL1: MHU init between RSE and AP
- Rnote over AP_BL1: Measure and load:\n\ FW_CONFIG\n\ TB_FW_CONFIG
- AP_BL1 -> RSE_S: Extend measurement
- Rnote over RSE_S: Measured Boot:\n\ store measurement
- AP_BL1 -->> AP_BL2: Validate, measure,load
- AP_BL1 -> RSE_S: Extend measurement
- Rnote over RSE_S: Measured Boot:\n\ store measurement
- AP_BL1 -> AP_BL2: Pass execution
- deactivate AP_BL1
- activate AP_BL2 #Green
- Rnote over AP_BL2: Measure and load:\n\ HW_CONFIG
- AP_BL2 -> RSE_S: Extend measurement
- Rnote over RSE_S: Measured Boot:\n\ store measurement
- AP_BL2 -->> AP_BL31: Validate, measure,load
- Rnote over AP_BL2: Measure and load:\n\ BL31
- AP_BL2 -> RSE_S: Extend measurement
- Rnote over RSE_S: Measured Boot:\n\ store measurement
- Rnote over AP_BL2: Measure and load:\n\ RMM
- AP_BL2 -> RSE_S: Extend measurement
- Rnote over RSE_S: Measured Boot:\n\ store measurement
- AP_BL2 -> AP_BL31: Pass execution
- deactivate AP_BL2
- activate AP_BL31 #Green
- == RSE / AP Runtime ==
- @enduml
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