| /' |
| ' Copyright (c) 2021, Arm Limited. All rights reserved. |
| ' |
| ' SPDX-License-Identifier: BSD-3-Clause |
| '/ |
| |
| /' |
| TF-A Data Flow Diagram |
| '/ |
| |
| @startuml |
| digraph tfa_dfd { |
| |
| # Arrange nodes from left to right |
| rankdir="LR" |
| |
| # 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="Non-secure\nClients"] |
| sec [label="Secure\nClients"] |
| dbg [label="Debug & Trace"] |
| logs [label="Logs\n(UART)"] |
| nvm [label="Non-volatile\nMemory"] |
| |
| # 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] |
| tzc [label="TZ\nController" width=1.2 height=0.5] |
| etc [label="..." shape=none style=none height=0.5] |
| } |
| |
| # TF-A cluster |
| subgraph cluster_tfa{ |
| label ="TF-A"; |
| graph [style=filled color="#000000" fillcolor="#faf9cd"] |
| |
| bl1 [label="Boot ROM\n(BL1)" fillcolor="#ddffb3"]; |
| bl2 [label="Trusted Boot\nFirmware\n(BL2)" fillcolor="#ddffb3" height=1] |
| bl31 [label="TF-A Runtime\n(BL31)" fillcolor="#ddffb3"] |
| } |
| } |
| |
| # Interactions between nodes |
| nvm -> bl31 [lhead=cluster_tfa label="DF1"] |
| logs -> bl31 [dir="back" lhead=cluster_tfa label="DF2"] |
| dbg -> bl2 [dir="both" lhead=cluster_tfa label="DF3"] |
| sec -> bl2 [dir="both" lhead=cluster_tfa label="DF4"] |
| nsec -> bl1 [dir="both" lhead=cluster_tfa, label="DF5"] |
| bl2 -> tzc [dir="both" ltail=cluster_tfa lhead=cluster_ip label="DF6" minlen=1] |
| } |
| |
| @enduml |