Start working towards chisel6

[jerryz123]

• Switches to chisel6
• Removes hwacha/sha3/mempress (Too many old chisel2 APIs)
• Adds midas-targetutils library to generate fsim annotations
• Removes chiseltest
• Adds firrtl2 submodule
• Removes esp-tools
• Removes upf
• Flattens barstools into chipyard
• Removes unused features of barstools
• Removes firesim-as-submod

Status:

• Chipyard sbt project compiles

Todos

• Update macrocompiler to use firrtl2 APIs and stage/phase stuff
• Update tapeout.GenerateModel to use firrtl2 APIs and stage/phase stuff
• Test chipyard RTL generation + simulation
• Develop firesim Bridge + anno API
• Develop firesim standalone compile and run flow

Related PRs / Issues:

Type of change:

• Bug fix
• New feature
• Other enhancement

Impact:

• RTL change
• Software change (RISC-V software)
• Build system change
• Other

Contributor Checklist:

• Did you set main as the base branch?
• Is this PR's title suitable for inclusion in the changelog and have you added a changelog:<topic> label?
• Did you state the type-of-change/impact?
• Did you delete any extraneous prints/debugging code?
• Did you mark the PR with a changelog: label?
• (If applicable) Did you update the conda .conda-lock.yml file if you updated the conda requirements file?
• (If applicable) Did you add documentation for the feature?
• (If applicable) Did you add a test demonstrating the PR?

• (If applicable) Did you mark the PR as Please Backport?

[abejgonzalez]

Wasn't the plan to keep FireSim as a submod for this initial work?

[tymcauley]

FYI, I've got a few PRs to some of these upstream projects which might take care of some of the work:

• Update Chisel version to 5.1.0 fixedpoint#8
• Update Chisel version to 5.1.0 dsptools#251
• Update deprecated APIs for Chisel 5 update rocket-dsp-utils#18

[jerryz123]

Wasn't the plan to keep FireSim as a submod for this initial work?

We can add it back in once it is working again... I removed it for now to guarantee that the chipyard build is independent of firesim.