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open-power / snap

CAPI SNAP Framework Hardware and Software
Apache License 2.0
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Cannot simulate with QuestaSim #891

Open BasF0 opened 5 years ago

BasF0 commented 5 years ago

When trying to start simulation of an example with QuestaSim it fails with message:

# ** Error (suppressible): (vsim-19) Failed to access library 'work' at "work". # No such file or directory. (errno = ENOENT) # Error loading design

In the compile_questa.log the first error is:

** Error: ../../hdl/core/snap_core_types.vhd(257): near "address": (vcom-1576) expecting ':'.

Which fails to compile top, thus failing simulation. The line mentioned is a comment, so I'm not sure what is going on there.

occurs on latest master: 1507cb15cdce56b13f487cd3fc7562e24ba8d156 also tried one of the early commits mentioning questasim, same error: 1ebc208a0bc09a9eb9d1b41b80f7652e423b6d5a

Tried with FPGA= Xilinx U200, Nallatech 250S, hdl_helloworld, hls_helloworld examples..

Vivado v2018.3, QuestaSim-64 10.6a

bmesnet commented 5 years ago

Hello I have unfortunately no more access to this Questa license, but it seems that your issue could be due to the comment itself. Can you try and remove the 2 commented lines, then do a make clean to be sure the file snap_core_types.vhdwill be regenerated from the source file , and redo your simulation? Thanks

BasF0 commented 5 years ago

Update: so removing the lines suggested only brings the error to the next "-- PSL *" comment until none of the source files in /snap/hardware/hdl/core/ have them anymore.. Found out why, looks like there is a naming conflict with https://en.wikipedia.org/wiki/Property_Specification_Language that Questa expects. To prevent this, in modelsim.ini I uncomment "EmbeddedPsl = 0"

Since "make model" resets the modelsim.ini file, atm I manually run vsim and run compile.do and elaborate.do

Also, the output is generated in a different directory than run_sim seems to expect Whereas the output is at: 

$SNAP_ROOT/hardware/sim/questa/questa_lib/msim
$SNAP_ROOT/hardware/sim/questa/questa_lib/work

Also, I believe that simulation target should be "top_opt" and not "top" as in run_sim

After this, calling run_sim, Questa seems to start without errors but pauses at 0ps. I believe that at this point a new terminal should pop up, but it doesn't. Manually hitting "run all" gives a fatal error on core/top.sv, "Null foreign function encountered when calling 'psl_bfm_init'. Maybe DCI related?

bmesnet commented 5 years ago

Hi @BasF0 Anything you can improve is welcome for the community. Don't hesitate to do a pull request of your code as soon as you have been able to fix this issue. I confirm that I can't get any license nor support for this simulator as of today. Maybe Mentor Graphics can help you diagnosing the failure if you have a license/support. Thanks