This contains a small SystemC/TLM-2.0 based subsystem for demo purposes. It has an interconnect connecting a remote-port attached QEMU instance, a demo/debug-device, a small DMA and if verilator is available a timer. Note that the remote-port instance connecting to QEMU can serve multiple QEMU instances. In fact, this demo can run connected to the ZynqMP platform with 2 external QEMU instances (APU/RPU and PMU). All of these instances can access the TLM world.
The demo/debug-device is used to read out System-C time, output debug trace/events and to end the simulation.
The DMA is used to demonstrate the bus mastering capabilities of the TLM world back into QEMU via remote-port.
The timer is a minimalistic APB connected timer written in verilog. If verilator is available, this timer can be hooked into the simulation. For TLM to be able to talk to the APB timer, a TLM-2-APB bridge was written in System-C.
Before building you will need to ensure that you have SystemC and SCML available.
The demo was prepared assuming the following versions: SystemC: 2.3.2
The Makefile assumes that both are installed in the directories below: SystemC: /usr/local/systemc-2.3.2/
If you have them installed in different directories point the Makefile to the correct directory by setting the variables SYSTEMC.
You will also need to clone the libremote-port submodule, by running: $ git submodule update --init libsystemctlm-soc
Also make sure to have the <linux/pci_regs.h> header in the default search
directory list for your version of CPP (the header is required by the
pcie-model submodule). On a Ubuntu LTS system the header can be installed
through the linux-libc-dev packages.
$ sudo apt-get install linux-libc-dev
Once everything is installed you can just run make. If SystemC is in a different directory then mentioned about you will need to specify the directory by setting the variables mentioned above.
You can also configure the build by creating a .config.mk file. There are other options that can be set, e.g: HAVE_VERILOG=n HAVE_VERILOG_VERILATOR=n HAVE_VERILOG_VCS=n
When running you will need to make sure the program can link to your SystemC/TLM libraries. You will also need to give arguments to the application. The first argument points to the QEMU machine-path to use. The second argument is the icount value to use. The arguments should line up with the QEMU command line arguments.
A Versal example: In one terminal, in the demo directory LD_LIBRARY_PATH=/usr/local/systemc-2.3.2/lib-linux64/ ./versal_demo \ unix:/tmp/qemu/qemu-rport-_amba@0_cosim@0 10000
A ZynqMP example: In one terminal, in the demo directory LD_LIBRARY_PATH=/usr/local/systemc-2.3.2/lib-linux64/ ./zynqmp_demo \ unix:./qemu-tmp/qemu-rport-_amba@0_cosim@0 10000
A Zynq-7000 example: LD_LIBRARY_PATH=/usr/local/systemc-2.3.2/lib-linux64/ ./zynq_demo \ unix:./qemu-tmp/qemu-rport-_cosim@0 1000000
In another terminal you will need to start up the PS. In this case we are going to start up a PetaLinux QEMU session and use the Linux kernel to probe the SystemC side. You could also start up your own kernel with the required drivers or a baremetal application.
See here for instructions on how to start the PetaLinux QEMU session: http://www.wiki.xilinx.com/Co-simulation
This repository also contains a demo where a QEMU / SystemC co-simulation is automatically generated from an IP-XACT description. More information about this demo and instructions for how to launch it manually can be found inside the 'zynqmp_lmac2_ipxact_demo.txt' file.