From a08e9d43eee72bb3143c9dad304c966e700be810 Mon Sep 17 00:00:00 2001
From: Kristofer Jonsson <kristofer.jonsson@arm.com>
Date: Wed, 28 Apr 2021 12:32:28 +0200
Subject: Documenting startup and multi NPU

Adding documentation and sequence diagrams for startup and multi
NPU.

Change-Id: I4a4a43e8bea089b6325f7d8285434017cbda25ec
---
 docs/startup.svg | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 docs/startup.svg

(limited to 'docs/startup.svg')

diff --git a/docs/startup.svg b/docs/startup.svg
new file mode 100644
index 0000000..a2c9f52
--- /dev/null
+++ b/docs/startup.svg
@@ -0,0 +1,84 @@
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stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="1138" x2="1138" y1="610.2891" y2="620.2891"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="1148" x2="1138" y1="620.2891" y2="620.2891"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="124" x="1009" y="627.356">Running application</text><!--
+@startuml
+
+skinparam backgroundColor #EEEBDC
+
+box "Hardware" #FFC700
+participant "Cortex-M" as cortexm
+participant "Ethos-U" as ethosu
+end box
+
+box "CMSIS Device" #0091BD
+participant "__VECTOR_TABLE" as ivec
+participant "Reset_Handler()" as reset
+end box
+
+box "Compiler" #FF6B00
+participant "Runtime" as runtime
+end box
+
+box "Target" #95D600
+participant "common" as common
+participant "corstone-300" as target
+end box
+
+box "Drivers" #00C1DE
+participant "NPU" as driver
+participant "UART" as uart
+participant "MPU" as mpu
+end box
+
+box "Application" #7D868C
+participant "main()" as main
+end box
+
+cortexm -> ivec++:
+    ivec -> reset++: Reset_Handler()
+        reset -> reset++: SystemInit()
+        deactivate reset
+
+        reset -> runtime++: __main()
+        note over runtime
+            Scatter loading
+            Initializing stack and heap
+        end note
+
+        note over runtime
+            Calling constructors
+        end note
+
+        runtime -> common++: init() [constructor]
+            note over common
+                The constructor is called after stack and heap have been initialized,
+                but before the main() function is called
+            end note
+
+            common -> target++: targetSetup()
+                target -> uart++: uart_init()
+                return
+
+                target -> driver++: ethosu_init()
+                return
+
+                target -> mpu++: loadAndEnableConfig()
+                return
+            return
+        return
+
+        runtime -> main++: main()
+            note over main
+                Running application
+            end note
+@enduml
+
+PlantUML version 1.2017.15(Mon Jul 03 18:45:34 CEST 2017)
+(GPL source distribution)
+Java Runtime: OpenJDK Runtime Environment
+JVM: OpenJDK 64-Bit Server VM
+Java Version: 11.0.10+9-Ubuntu-0ubuntu1.18.04
+Operating System: Linux
+OS Version: 5.4.0-70-generic
+Default Encoding: UTF-8
+Language: en
+Country: US
+--></g></svg>
\ No newline at end of file
-- 
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