Dev -> Master Tracking PR

[davidbiancolin]

Developers: Please add descriptions of your changes to this PR as your PRs are merged into Dev

Added

• Upgraded MIDAS to Golden Gate (MIDAS II)
• [WIP] Better support for FireSim as a library.
  • Toolchains now built through chipyard, with firesim-specific tools added on top
• Workloads
  • Coremark (PR Add coremark workload #288)
  • A linux workload that immediately powers off (PR [workloads] Add an automated linux workload that simply powers off #321)
• SiFive L2 Cache added to pre-generated AGFIs
  • 512 KiB, single-bank
• Added SHA3 AFIs (PR Hetero config naming cleanup + Regenerate BOOM AFIs #368)

Changed

• FireChip replaced with chipyard
  • Derived from project-template, like FireChip
  • Improved integration with other UCB-BAR projects
• MIDAS Endpoints replaced with Golden Gate target-to-host Bridges
  • See porting guide for more information
• Submodules moved
  • sim/{firrtl, barstools} -> moved to chipyard
  • sw/firesim-software -> [Nathan]
• Config files reorganized (found in firesim-lib/src/main/scala/configs)
  • Bridges (formerly endpoints) configured in target generator
  • [PLATFORM_CONFIG] SimConfigs.scala -> CompilerConfigs.scala
  • [PLATFORM_CONFIG] util/Configs.scala -> F1PlatformConfigs.scala:
  • [TARGET_CONFIG] FASEDConfigs moved from SimConfigs.scala to FASEDTargetConfigs.scala (passed to target generator)
• FASED memory timing models use maximum # of available sets and ways
  • 2MiB default
• build recipe & hwdb entry names changed to match cache hierarchy
• Boom based targets now use LargeBoomConfig
• Boom based targets now use FireSim DESIGN (PR Hetero config naming cleanup + Regenerate BOOM AFIs #368)
• FASED memory models can now have different address widths for each channel
• 0-initialize registers and memories in MIDAS-level VCS simulation
• Default to c5.4xlarges for builds/manager instances
• Make 4.x is needed to build the updated toolchain (PR Use GNU make 4.x for toolchain build #345)
  Upgrade procedure for existing EC2 instances:

  sudo yum install -y centos-release-scl
  sudo yum install -y devtoolset-8-make
  

Fixed

• Block Device widget
  • A bug that would cause the simulation to hang under current reads and writes (PR Fix a Block Device Endpoint Bug  #308)
  • A determinism hole that would cause reads to be released prematurely in target-time (PR Two Block Device Widget Fixes #325)

Deprecated

• None

Removed

• "Developing New Devices" section in documentation

[alonamid]

LGTM