Arm Total Compute Solutions (TCS) is the platform for mobile computing, with double double-digit gains in CPU performance and efficiency to power the next generation of AI and immersive mobile gaming experiences.

Total Compute (TC) software stack is a reference software stack for the Arm Total Compute Fixed Virtual Platform (FVP). The TC software consists of firmware, kernel and file system components that can run on the associated FVP.

Some of its main components are as follows:

• RSS firmware, which provides Hardware Root of Trust
• SCP firmware, which is responsible for system initialization, clock and power control;
• AP firmware, which is Trusted Firmware-A (TF-A)
• Secure Partition Manager - Hafnium
• Secure Partitions:
  • OP-TEE Trusted OS in Buildroot
  • Trusted Services in Buildroot
  • Trusty Trusted OS in Android
• U-Boot, which loads and verifies kernel and rootfs
• Linux Kernel

This blog shows you how to set up the debugging environment step by step, including how to configure the debug environments for RSS, SCP, and AP.

Prerequisites

This blog assumes that you already set up the following environment:

• Host PC (Ubuntu Linux 20.04)
• TC2 Fast Model platform (FVP) (version 11.23.17)
• Arm Development Studio (Latest version)
• Download and build TC2 software stack, by following the Total Compute User Guide. 

Overview

This blog describes the following steps to set up debugging environment for Total Compute Software Stack:

Step 1: Import TC FVP Model into Arm DS.

Step 2: Start FVP and launch the Iris debug server.

Step 3: Establish debug connections in Arm DS, including:

Application Processor debug connection.

System Control Processor debug connection.

Runtime Security Subsystem debug connection.

Step 4: Load corresponding symbol tables file and start debugging.

Step 1: Import TC FVP Model into Arm DS

Arm DS supports some built-in FVP models, but TC2 FVP is not included in the built-in models of Arm DS. Before you start debugging TC2, you must use the Model Configuration wizard in Arm DS to create debug configurations for new models:

1. Open the Model Configuration wizard
   From the Main menu, select File -> New -> Other -> Configuration Database -> Model Configuration and click Next, as follows:
   
   
   
   
2. Create the configuration database where you want to include your TC2 model, as follows:
   
   
3. Choose Configuration Database and click Next, as follows:
   
   
   
   
4. Select Iris as the model interface for connecting to your model, as follows:
   
   
   
   
5. Select the Launch and connect to specific to your model, as follows:
   
   
   
   
6. In Model Selection from File System dialog box, click File to browse for a model and select it, as follows:
   
   
   
   
7. Click the Import button to import the TC2 FVP model, as follows:
   
   
8. Verify whether the import is successful, by checking for the imported model in the Project Explorer, as follows: