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xrt-hwemu-firesim-tlm-bug's Introduction

This is a snippet of the FireSim repository with a precompiled application binary that should run fine on a Centos7 Vitis Development Image.

The easiest way to observe the misbehaving TLM model is to comment out line 43 of scripts/package_kernel.tcl. There's a clock domain crossing at the top-level of the kernel RTL which crosses the AXI4lite bus for register peeksjk and pokes into the kernel's clock domain (which is generated by an internal MCMM). When SELECTED_SIM_MODEL is not set to RTL, master requests do not appear synchronized to the slave's clock domain. Instead they pass through as though they were driven by the master's clock. See the screenshot below. When line 43 is uncommented it behaves fine.

Screenshot

How to reproduce:

source /opt/xilinx/xrt/setup.sh

make sim

  • Should package and build the XCLBIN for hw emu.

make run-sim

  • Will run the simulation out of the simulation/xilinx_u250_gen3x16_xdma_2_1_202010_1.run directory with the correct plus args.
  • Set the DEBUG_MODE make variable to switch between batch, gui, none
  • See the screen shot for time and signals of interest

xrt-hwemu-firesim-tlm-bug's People

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