@startuml
scale 520 height
skinparam backgroundColor transparent
skinparam shadowing false
skinparam defaultFontName Monospace
skinparam defaultFontSize 11
skinparam sequenceArrowColor #8095a1
title A5 FLOW — three notification protocols on one target slot
participant "Sender p3" as S
participant "Receiver p2" as R
participant "TCB notify[0]" as N
participant "Verifier p0" as V
S -> S : 02 arm; wait for phase 1 + Blocked
R -> N : 03 ulTaskNotifyTake(clear); Blocked
S -> N : give + give + give
S -> S : 04 receiver was Blocked; value=3
N --> R : 05 return 3; clear value
R -> N : 06 probe zero; wait overwrite
S -> N : overwrite 0x11; overwrite 0x22
S -> S : 07 receiver was Blocked
N --> R : 08 return 0x22; clear value
R -> N : 09 probe zero; wait bits
S -> N : setBits 0x04; setBits 0x20
S -> S : 10 receiver was Blocked
N --> R : 11 return 0x24; clear value
R -> V : completed
S -> V : completed
V -> V : 12 PASS + digest
@enduml