1*91f16700Schasinglulu@startuml 2*91f16700Schasingluluskinparam ParticipantPadding 10 3*91f16700Schasingluluskinparam BoxPadding 10 4*91f16700Schasinglulubox RSS 5*91f16700Schasingluluparticipant RSS_BL1_1 6*91f16700Schasingluluparticipant RSS_BL1_2 7*91f16700Schasingluluparticipant RSS_BL2 8*91f16700Schasingluluparticipant RSS_S 9*91f16700Schasingluluendbox 10*91f16700Schasinglulubox SCP 11*91f16700Schasingluluparticipant SCP_BL1 12*91f16700Schasingluluendbox 13*91f16700Schasinglulubox AP 14*91f16700Schasingluluparticipant AP_BL1 15*91f16700Schasingluluparticipant AP_BL2 16*91f16700Schasingluluparticipant AP_BL31 17*91f16700Schasingluluendbox 18*91f16700Schasinglulu 19*91f16700Schasinglulu== RSS Boot phase == 20*91f16700Schasinglulu-> RSS_BL1_1: Reset 21*91f16700SchasingluluRnote over RSS_BL1_1: ROM code, XIP 22*91f16700SchasingluluRnote over RSS_BL1_2: OTP code, XIP 23*91f16700SchasingluluRnote over RSS_BL2, AP_BL31: Stored in flash, loaded and executed in RAM 24*91f16700Schasingluluactivate RSS_BL1_1 #Green 25*91f16700SchasingluluRSS_BL1_1 -->> RSS_BL1_2: Validate, measure 26*91f16700SchasingluluRnote over RSS_BL1_1: BL1_2 measurement\n\ saved to a shared buffer 27*91f16700SchasingluluRSS_BL1_1 -> RSS_BL1_2: Pass execution 28*91f16700Schasingluludeactivate RSS_BL1_1 29*91f16700Schasingluluactivate RSS_BL1_2 #Green 30*91f16700SchasingluluRSS_BL1_2 -->> RSS_BL2: Validate, measure, load 31*91f16700SchasingluluRnote over RSS_BL1_2: RSS_BL2 measurement\n\ saved to a shared buffer 32*91f16700SchasingluluRSS_BL1_2 -> RSS_BL2: Pass execution 33*91f16700Schasingluludeactivate RSS_BL1_2 34*91f16700Schasingluluactivate RSS_BL2 #Green 35*91f16700SchasingluluRSS_BL2 -->> RSS_S: Validate, measure, load 36*91f16700SchasingluluRSS_BL2 -->> SCP_BL1: Validate, measure, load 37*91f16700SchasingluluRnote over RSS_BL2: RSS_S and SCP_BL1\n\ measurements saved\n\ to a shared buffer 38*91f16700SchasingluluRSS_BL2 -> SCP_BL1: Release from reset 39*91f16700Schasingluluactivate SCP_BL1 #Green 40*91f16700SchasingluluRnote over RSS_BL2, SCP_BL1: MHU init between RSS and SCP 41*91f16700SchasingluluRnote over SCP_BL1: Configure memory 42*91f16700SchasingluluRnote over RSS_BL2: Waits for SCP 43*91f16700SchasingluluSCP_BL1 --> RSS_BL2: Done 44*91f16700SchasingluluRSS_BL2 -->> AP_BL1: Validate, measure, load 45*91f16700SchasingluluRnote over RSS_BL2: AP_BL1 measurement\n\ saved to a shared buffer 46*91f16700SchasingluluRSS_BL2 -> AP_BL1: Release from reset 47*91f16700Schasingluluactivate AP_BL1 #Green 48*91f16700SchasingluluRSS_BL2 -> RSS_S: Pass execution 49*91f16700Schasingluludeactivate RSS_BL2 50*91f16700Schasingluluactivate RSS_S #Green 51*91f16700SchasingluluRnote over RSS_S: Measurements read from\n\ shared buffer and saved by\n\ 52*91f16700SchasingluluMeasured Boot service to\n\ measurement slots. 53*91f16700Schasinglulu 54*91f16700Schasinglulu== RSS Runtime / AP Boot phase == 55*91f16700SchasingluluRnote over RSS_S, AP_BL1: MHU init between RSS and AP 56*91f16700SchasingluluRnote over AP_BL1: Measure and load:\n\ FW_CONFIG\n\ TB_FW_CONFIG 57*91f16700SchasingluluAP_BL1 -> RSS_S: Extend measurement 58*91f16700SchasingluluRnote over RSS_S: Measured Boot:\n\ store measurement 59*91f16700SchasingluluAP_BL1 -->> AP_BL2: Validate, measure,load 60*91f16700SchasingluluAP_BL1 -> RSS_S: Extend measurement 61*91f16700SchasingluluRnote over RSS_S: Measured Boot:\n\ store measurement 62*91f16700SchasingluluAP_BL1 -> AP_BL2: Pass execution 63*91f16700Schasingluludeactivate AP_BL1 64*91f16700Schasingluluactivate AP_BL2 #Green 65*91f16700SchasingluluRnote over AP_BL2: Measure and load:\n\ HW_CONFIG 66*91f16700SchasingluluAP_BL2 -> RSS_S: Extend measurement 67*91f16700SchasingluluRnote over RSS_S: Measured Boot:\n\ store measurement 68*91f16700SchasingluluAP_BL2 -->> AP_BL31: Validate, measure,load 69*91f16700SchasingluluRnote over AP_BL2: Measure and load:\n\ BL31 70*91f16700SchasingluluAP_BL2 -> RSS_S: Extend measurement 71*91f16700SchasingluluRnote over RSS_S: Measured Boot:\n\ store measurement 72*91f16700SchasingluluRnote over AP_BL2: Measure and load:\n\ RMM 73*91f16700SchasingluluAP_BL2 -> RSS_S: Extend measurement 74*91f16700SchasingluluRnote over RSS_S: Measured Boot:\n\ store measurement 75*91f16700SchasingluluAP_BL2 -> AP_BL31: Pass execution 76*91f16700Schasingluludeactivate AP_BL2 77*91f16700Schasingluluactivate AP_BL31 #Green 78*91f16700Schasinglulu== RSS / AP Runtime == 79*91f16700Schasinglulu@enduml 80