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Tamas Banef589bf2022-11-30 17:09:43 +01001/'
2 ' Copyright (c) 2021-2022, Arm Limited. All rights reserved.
3 '
4 ' SPDX-License-Identifier: BSD-3-Clause
5 '/
6
7/'
8TF-A Data Flow Diagram including RSS
9'/
10
11@startuml
12digraph tfa_dfd {
13
14 # Arrange nodes from left to right
15 rankdir="LR"
16
17 # Allow arrows to end on cluster boundaries
18 compound=true
19
20 # Default settings for edges and nodes
21 edge [minlen=2 color="#8c1b07"]
22 node [fillcolor="#ffb866" style=filled shape=box fixedsize=true width=1.6 height=0.7]
23
24 # Nodes outside of the trust boundary
25 nsec [label="Non-secure\nClients"]
26 sec [label="Secure\nClients"]
27 dbg [label="Debug & Trace"]
28 logs [label="Logs\n(UART)"]
29 nvm [label="Non-volatile\nMemory"]
30
31
32 # Trust boundary cluster
33 subgraph cluster_trusted{
34 graph [style=dashed color="#f22430"]
35
36 # HW IPs cluster
37 subgraph cluster_ip{
38 label ="Hardware IPs";
39 graph [style=filled color="#000000" fillcolor="#ffd29e"]
40
41 rank="same"
42 gic [label="GIC" width=1.2 height=0.5]
43 tzc [label="TZ\nController" width=1.2 height=0.5]
44 etc [label="..." shape=none style=none height=0.5]
45 }
46
47 # TF-A cluster
48 subgraph cluster_tfa{
49 label ="TF-A";
50 graph [style=filled color="#000000" fillcolor="#faf9cd"]
51
52 bl1 [label="Boot ROM\n(BL1)" fillcolor="#ddffb3"];
53 bl2 [label="Trusted Boot\nFirmware\n(BL2)" fillcolor="#ddffb3" height=1]
54 bl31 [label="TF-A Runtime\n(BL31)" fillcolor="#ddffb3"]
55 }
56
57 # RSS cluster
58 subgraph cluster_rss{
59 label ="RSS";
60 graph [style=filled color="#000000" fillcolor="#faf9cd"]
61
62 rss [label="Runtime Security\n\ Subsystem\n\ (RSS)" fillcolor="#ddffb3"]
63 }
64 }
65
66 # Interactions between nodes
67 nvm -> bl31 [lhead=cluster_tfa label="DF1"]
68 logs -> bl31 [dir="back" lhead=cluster_tfa label="DF2"]
69 dbg -> bl2 [dir="both" lhead=cluster_tfa label="DF3"]
70 sec -> bl2 [dir="both" lhead=cluster_tfa label="DF4"]
71 nsec -> bl1 [dir="both" lhead=cluster_tfa, label="DF5"]
72 bl2 -> tzc [dir="both" ltail=cluster_tfa lhead=cluster_ip label="DF6" minlen=1]
73 bl31 -> rss [dir="both" ltail=cluster_tfa lhead=cluster_rss label="DF7" minlen=1]
74
75}
76
77@enduml