Table of Contents
User can create the design using the Vivado IP Integrator tool (see related links). Export to SDK, to create the HDF file.
This HDF file is to be used to create the devicetree that is used in QEMU
Xilinx provide a devicetree generator (DTG) to create devicetree from a HDF file
Below is a quick example of generating and compiling devicetree sources for MicroBlaze. For more comprehensive details see Build Device Tree Blob. |
Note: Make sure that these is a memory node added to the pl.dtsi. This may not be added by the DTG.
If not, users can add this as shown below:
lmb_bram: memory@0 { device_type = "memory"; reg = < 0x0 0x10000000 >; } ; |
Then update the Microblaze node with this:
memory = <&lmb_bram>; |
Also, the Microblaze Node should be updated to change the model and version:
model = "microblaze,8.40.b"; version = "8.40.b"; |
proc gen_dtb {hdf} { open_hw_design $hdf set_repo_path ./repo create_sw_design device-tree -os device_tree -proc microblaze_0 generate_target -dir my_dts } |
qemu-system-microblazeel -M microblaze-fdt-plnx -m 256 -serial mon:stdio -device loader,file=mb_bootloop_le.elf -gdb tcp::1137 -hw-dtb my_dts/system-top.dtb -display none |
Note: Here users can ether pass the bootloop elf, or the actual executable that they want to test.
Currently, the XSDB debugger does not support the Microblaze via QEMU. Users, can use the GDB debugger.
Users can connect to the debugger using the target remote: <port> command
Since the Microblaze is configured to use Little Endian (this is hard-coded in the Microblaze config), then we must tell the debugger this.
Load the ELF, and symbol info and then user is ready to debug.
Here, we can see the output on the serial port:
Type Ctrl A + x to terminate the QEMU