TLM-COSIM-DEMO
---------------------------------------
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 intances 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.

BUILD
---------------------------------------
Before buidling you will need to ensure that you have SystemC and SCML
avaliable.

The demo was prepared assuming the following versions:
    SystemC: 2.3.1

The Makefile assumes that both are installed in the direcotries below:
    SystemC: /usr/local/systemc-2.3.1/

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 submode, by running:
    $ git submodule update --init libsystemctlm-soc

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

RUN
---------------------------------------
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 ZynqMP example:
In one terminal, in the demo directory
LD_LIBRARY_PATH=/usr/local/systemc-2.3.1/lib-linux64/ ./zynqmp_demo \
    unix:./qemu-tmp/qemu-rport-_amba@0_cosim@0 10000

A Zynq-7000 example:
LD_LIBRARY_PATH=/usr/local/systemc-2.3.1/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/QEMU+SystemC+and+TLM+CoSimulation