1/'
2 ' Copyright (c) 2021, Arm Limited. All rights reserved.
3 '
4 ' SPDX-License-Identifier: BSD-3-Clause
5 '/
6
7/'
8TF-A SPMC Data Flow Diagram
9'/
10
11@startuml
12digraph tfa_dfd {
13
14    # Allow arrows to end on cluster boundaries
15    compound=true
16
17    # Default settings for edges and nodes
18    edge [minlen=2 color="#8c1b07"]
19    node [fillcolor="#ffb866" style=filled shape=box fixedsize=true width=1.6 height=0.7]
20
21    # Nodes outside of the trust boundary
22    nsec [label="NS Client"]
23    ddr  [label="External memory (DDR)"]
24
25    # Trust boundary cluster
26    subgraph cluster_trusted {
27        graph [style=dashed color="#f22430"]
28
29        # HW IPs cluster
30        subgraph cluster_ip {
31            label ="Hardware IPs";
32            graph [style=filled color="#000000" fillcolor="#ffd29e"]
33
34            rank="same"
35            gic [label="GIC" width=1.2 height=0.5]
36            smmu [label="SMMU" width=1.2 height=0.5]
37            uart [label="UART" width=1.2 height=0.5]
38	    pe [label="PE" width=1.2 height=0.5]
39        }
40
41        # TF-A cluster
42        subgraph cluster_tfa {
43            label ="EL3 monitor";
44            graph [style=filled color="#000000" fillcolor="#faf9cd"]
45
46            bl31 [label="BL31" fillcolor="#ddffb3"];
47            spmd [label="SPMD" fillcolor="#ddffb3" height=1]
48        }
49
50        # SPMC cluster
51        subgraph cluster_spmc {
52            label ="SPMC";
53            graph [style=filled color="#000000" fillcolor="#faf9cd"]
54
55            spmc [label="SPMC" fillcolor="#ddffb3" height=1]
56        }
57	bl2 [label="BL2" width=1.2 height=0.5]
58    }
59
60    # Secure Partitions cluster
61    subgraph cluster_sp {
62        label ="Secure Partitions";
63        graph [style=filled color="#000000" fillcolor="#faf9cd"]
64
65        sp1 [label="SP1" fillcolor="#ddffb3" height=1]
66        sp2 [label="SP2" fillcolor="#ddffb3" height=1]
67        spn [label="SP..." fillcolor="#ddffb3" height=1]
68    }
69
70    # Interactions between nodes
71    sp1 -> spmc [dir="both" label="DF1"]
72    spmc -> spmd [dir="both" label="DF2"]
73    spmd -> nsec [dir="both" label="DF3"]
74    sp1 -> sp2 [dir="both" label="DF4"]
75    spmc -> smmu [lhead=cluster_spmc label="DF5"]
76    bl2 -> spmc [lhead=cluster_spmc label="DF6"]
77    bl2 -> spn [lhead=cluster_spmc label="DF6"]
78    sp1 -> ddr [dir="both"  label="DF7"]
79    spmc -> ddr [dir="both"  label="DF7"]
80}
81
82@enduml
83