Generating genesys2-riscv.mcs on WSL?

[matsbror]

As the title says, I am using Ubuntu 20.04 on WSL2 and the idea is to program the Genesys2 board from Vivado on Windows. I cannot find the file: workspace/rocket64b2/genesys2-riscv.mcs. I thought it would be generated at the stage make CONFIG=rocket64b4 BOARD=genesys2 vivado-tcl but apparently not.

When I try to do it manually I get:

Command: write_cfgmem -format mcs -interface SPIx4 -size 32 -loadbit {up 0x0 workspace/rocket64b4/vivado-genesys2-riscv/genesys2-riscv.run s/impl_1/riscv_wrapper.bit} -file workspace/rocket64b4/genesys2-riscv.mcs -force
Creating config memory files...
Creating bitstream load up from address 0x00000000
ERROR: [Writecfgmem 68-24] The SPIX4 interface does not support daisy chaining bit files.
0 Infos, 0 Warnings, 0 Critical Warnings and 1 Errors encountered.
write_cfgmem failed
ERROR: [Common 17-39] 'write_cfgmem' failed due to earlier errors.

Do I need to run vivado in Linux to make it work?

[eugene-tarassov]

You can run Vivado on Windows. make ... vivado-tcl creates a script that you can use on Windows to create Vivado project, then use Vivado GUI to generate bitstream and mcs files.

[matsbror]

Thanks @eugene-tarassov , I did just that and I could generate the bitstream, but did not see how to generate the mcs file. I will look again tomorrow.

[eugene-tarassov]

The error message does not make sense. I think the actual cause of the error is something simple, like wrong current directory or a typo in the file name.

[matsbror]

I have an issue that Vivaod (which runs in Windows) seems to not store the resulting files correctly. I can run "Generate Bitstream", but there is no .bit-file generated and it does not remember it had done the Synthesis and Implementation. I see no errors.

Can it have something to do with Windows vs linux file system?

[eugene-tarassov]

Windows has file path length limitation, 256 characters by default. If your vivado-risc-v is not a top level folder, it can cause problems.

[matsbror]

In the end I resolved it by installing vivado also on WSL and generating bitstream there and using vivado on Windows to program the FPGA.