Adding new Xilinx board for the demo

[tarik-hamedovic]

Hello

I have been trying to add a Alinx AX7201 board to the demo and try out the Ibex processor but I have been having some trouble.
I have added my own pins_ax7201.xdc file in the data directory, aswell as a bare bones top module in rtl/fpga called top_ax7201.sv. Then I modified the ibex_demo_system.core to include the aforementioned ax7201 files like this:

CAPI=2:
# Copyright lowRISC contributors.
# Licensed under the Apache License, Version 2.0, see LICENSE for details.
# SPDX-License-Identifier: Apache-2.0
name: "lowrisc:ibex:demo_system"
description: "Ibex Demo System for Arty A7 boards (both, -35 and -100)"
filesets:
 files_rtl:
   depend:
     - lowrisc:ibex:demo_system_core

 files_xilinx:
   depend:
     - lowrisc:ibex:rv_timer
     - lowrisc:ibex:fpga_xilinx_shared
   files:
     - rtl/fpga/top_artya7.sv
   file_type: systemVerilogSource
 
 files_ax7201:
   depend:
     - lowrisc:ibex:rv_timer
     - lowrisc:ibex:fpga_xilinx_shared
   files:
     - rtl/fpga/top_ax7201.sv
   file_type: systemVerilogSource
     
 files_xilinx_cw305:
   depend:
     - lowrisc:ibex:rv_timer
     - lowrisc:ibex:fpga_xilinx_shared
   files:
     - rtl/fpga/top_cw305.sv
   file_type: systemVerilogSource

 files_xilinx_cw312a35:
   depend:
     - lowrisc:ibex:rv_timer
     - lowrisc:ibex:fpga_xilinx_shared
   files:
     - rtl/fpga/top_cw312a35.sv
   file_type: systemVerilogSource

 files_sonata:
   depend:
     - lowrisc:ibex:rv_timer
     - lowrisc:ibex:fpga_xilinx_shared
   files:
     - rtl/fpga/top_sonata.sv
     - rtl/fpga/clkgen_sonata.sv
     - rtl/fpga/rst_ctrl.sv
   file_type: systemVerilogSource

 files_verilator:
   depend:
     - lowrisc:ibex:sim_shared
     - lowrisc:dv_verilator:memutil_verilator
     - lowrisc:dv_verilator:simutil_verilator
     - lowrisc:dv_verilator:ibex_pcounts
     - lowrisc:dv_dpi_c:uartdpi:0.1
     - lowrisc:dv_dpi_sv:uartdpi:0.1
   files:
     - dv/verilator/top_verilator.sv: { file_type: systemVerilogSource }
     - dv/verilator/ibex_demo_system.cc: { file_type: cppSource }
     - dv/verilator/ibex_demo_system.h:  { file_type: cppSource, is_include_file: true}
     - dv/verilator/ibex_demo_system_main.cc: { file_type: cppSource }
     - dv/verilator/demo_system_verilator_lint.vlt:  { file_type: vlt }

 files_constraints:
   files:
     - data/pins_artya7.xdc
   file_type: xdc
   
 files_constraints_ax7201:
   files:
     - data/pins_ax7201.xdc
   file_type: xdc

 files_constraints_cw305:
   files:
     - data/pins_cw305.xdc
   file_type: xdc

 files_constraints_cw312a35:
   files:
     - data/pins_cw312a35.xdc
   file_type: xdc

 files_constraints_sonata:
   files:
     - data/pins_sonata.xdc
   file_type: xdc

parameters:
 # XXX: This parameter needs to be absolute, or relative to the *.runs/synth_1
 # directory. It's best to pass it as absolute path when invoking fusesoc, e.g.
 # --SRAMInitFile=$PWD/sw/led/led.vmem
 # XXX: The VMEM file should be added to the sources of the Vivado project to
 # make the Vivado dependency tracking work. However this requires changes to
 # fusesoc first.
 SRAMInitFile:
   datatype: str
   description: SRAM initialization file in vmem hex format
   default: "../../../../../sw/c/build/blank/blank.vmem"
   paramtype: vlogparam

 # For value definition, please see ip/prim/rtl/prim_pkg.sv
 PRIM_DEFAULT_IMPL:
   datatype: str
   paramtype: vlogdefine
   description: Primitives implementation to use, e.g. "prim_pkg::ImplGeneric".

targets:
 default: &default_target
   filesets:
     - files_rtl
 synth:
   <<: *default_target
   default_tool: vivado
   filesets_append:
     - files_xilinx
     - files_constraints
   toplevel: top_artya7
   tools:
     vivado:
       part: "xc7a35tcsg324-1"  # Default to Arty A7-35
   parameters:
     - SRAMInitFile
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplXilinx
   flags:
     use_bscane_tap: true
 synth_ax7201:
   <<: *default_target
   default_tool: vivado
   filesets_append:
     - files_ax7201
     - files_constraints_ax7201
   toplevel: top_ax7201
   tools:
     vivado:
       part: "xc7a200tfbg484-2"
   parameters:
     - SRAMInitFile
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplXilinx
   flags:
     use_bscane_tap: true
 synth_cw305:
   <<: *default_target
   default_tool: vivado
   filesets_append:
     - files_xilinx_cw305
     - files_constraints_cw305
   toplevel: top_cw305
   tools:
     vivado:
       part: "xc7a100tftg256-2" # default to a100 part
       #part: "xc7a35tftg256-2" # a35 option
   parameters:
     - SRAMInitFile
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplXilinx
   flags:
     use_bscane_tap: true
 synth_cw312a35:
   <<: *default_target
   default_tool: vivado
   filesets_append:
     - files_xilinx_cw312a35
     - files_constraints_cw312a35
   toplevel: top_cw312a35
   tools:
     vivado:
       part: "xc7a35tcsg324-1"
   parameters:
     - SRAMInitFile
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplXilinx
   flags:
     use_bscane_tap: true
 synth_sonata:
   <<: *default_target
   default_tool: vivado
   filesets_append:
     - files_sonata
     - files_constraints_sonata
   toplevel: top_sonata
   tools:
     vivado:
       part: "xc7a50tcsg324-1"
   parameters:
     - SRAMInitFile
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplXilinx

 sim:
   <<: *default_target
   default_tool: verilator
   filesets_append:
     - files_verilator
   toplevel: top_verilator
   tools:
     verilator:
       mode: cc
       verilator_options:
         # Disabling tracing reduces compile times but doesn't have a
         # huge influence on runtime performance.
         - '--trace'
         - '--trace-fst' # this requires -DVM_TRACE_FMT_FST in CFLAGS below!
         - '--trace-structs'
         - '--trace-params'
         - '--trace-max-array 1024'
         - '-CFLAGS "-std=c++14 -Wall -DVM_TRACE_FMT_FST -DTOPLEVEL_NAME=top_verilator"'
         - '-LDFLAGS "-pthread -lutil -lelf"'
         - "-Wall"
         - "-Wwarn-IMPERFECTSCH"
         # RAM primitives wider than 64bit (required for ECC) fail to build in
         # Verilator without increasing the unroll count (see Verilator#1266)
         - "--unroll-count 72"
   parameters:
     - PRIM_DEFAULT_IMPL=prim_pkg::ImplGeneric

When trying to build the bitstream using fusesoc with this command:

fusesoc --cores-root=. run --target=synth_ax7201 --tool=vivado --setup --build lowrisc:ibex:demo_system --no-cache --verbose

I get the following error:

ERROR: Failed to determine work root. Could not resolve target

Or sometimes aswell:

ERROR: No tool was supplied on command line or found in 'lowrisc:ibex:demo_system' core description

Am I missing something?

Thank you in advance.

[marnovandermaas]

I've never used the tool option in the demo system, this is the command I usually use:
fusesoc --cores-root=. run --target=synth --setup --build lowrisc:ibex:demo_system

The default tool for synth is Vivado, which is the same for your ax7201. Did you have any trouble building the original bitstream for the arty a7? Then we at least know that the problem is with your added changes as opposed to your dev environment.

[tarik-hamedovic]

The original bitstream for the ArtyA7 built without a problem, I aswell tried the other synth options. I used the python venv. I originally tried without the tool option aswell and got the same error.

[marnovandermaas]

I found this old issue: olofk/fusesoc#586
Any further logging from fusesoc?

[tarik-hamedovic]

Here is a gist with all of the files I have added.

Using --verbose gives me back the same ERROR messages. When I don't use --tool=vivado I get:

ERROR: No tool was supplied on command line or found in 'lowrisc:ibex:demo_system' core description

When I use --tool=vivado I get:

ERROR: Failed to determine work root. Could not resolve target

[marnovandermaas]

Since this issue has been opened there have been a few more boards added to the demo system. Would you mind having a look at those? I cannot open that gist.

This is the command I would try:

fusesoc --cores-root=. run --target=synth_ax7201 --setup --build lowrisc:ibex:demo_system