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/'
' Copyright (c) 2021, Arm Limited. All rights reserved.
'
' SPDX-License-Identifier: BSD-3-Clause
'/
/'
TF-A SPMC Data Flow Diagram
'/
@startuml
digraph tfa_dfd {
# Allow arrows to end on cluster boundaries
compound=true
# Default settings for edges and nodes
edge [minlen=2 color="#8c1b07"]
node [fillcolor="#ffb866" style=filled shape=box fixedsize=true width=1.6 height=0.7]
# Nodes outside of the trust boundary
nsec [label="NS Client"]
ddr [label="External memory (DDR)"]
# Trust boundary cluster
subgraph cluster_trusted {
graph [style=dashed color="#f22430"]
# HW IPs cluster
subgraph cluster_ip {
label ="Hardware IPs";
graph [style=filled color="#000000" fillcolor="#ffd29e"]
rank="same"
gic [label="GIC" width=1.2 height=0.5]
smmu [label="SMMU" width=1.2 height=0.5]
uart [label="UART" width=1.2 height=0.5]
pe [label="PE" width=1.2 height=0.5]
}
# TF-A cluster
subgraph cluster_tfa {
label ="EL3 monitor";
graph [style=filled color="#000000" fillcolor="#faf9cd"]
bl31 [label="BL31" fillcolor="#ddffb3"];
spmd [label="SPMD" fillcolor="#ddffb3" height=1]
}
# SPMC cluster
subgraph cluster_spmc {
label ="SPMC";
graph [style=filled color="#000000" fillcolor="#faf9cd"]
spmc [label="SPMC" fillcolor="#ddffb3" height=1]
}
bl2 [label="BL2" width=1.2 height=0.5]
}
# Secure Partitions cluster
subgraph cluster_sp {
label ="Secure Partitions";
graph [style=filled color="#000000" fillcolor="#faf9cd"]
sp1 [label="SP1" fillcolor="#ddffb3" height=1]
sp2 [label="SP2" fillcolor="#ddffb3" height=1]
spn [label="SP..." fillcolor="#ddffb3" height=1]
}
# Interactions between nodes
sp1 -> spmc [dir="both" label="DF1"]
spmc -> spmd [dir="both" label="DF2"]
spmd -> nsec [dir="both" label="DF3"]
sp1 -> sp2 [dir="both" label="DF4"]
spmc -> smmu [lhead=cluster_spmc label="DF5"]
bl2 -> spmc [lhead=cluster_spmc label="DF6"]
bl2 -> spn [lhead=cluster_spmc label="DF6"]
sp1 -> ddr [dir="both" label="DF7"]
spmc -> ddr [dir="both" label="DF7"]
}
@enduml
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