riscv/rocket-chip
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Link PlusArg to emulator command line options

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- adds a mutable singleton (PlusArgArtefacts) to store information
  about Rocket PlusArgs
- adds methods to PlusArgArtefacts to emit C snippets that are
  consumed by emulator.cc for correct argument parsing and help text
  generation
- emits snippets in $(CONFIG).plusArgs via BaseCoreplex-set
  ElaborationArtefacts
- modify emulator/Makefrag-verilator to include $(CONFIG).plusArgs
- cleanup help text (docstring) for existing PlusArgs

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@gmail.com>
This commit is contained in:
Schuyler Eldridge
2018-01-15 14:21:09 -05:00
parent 8799508b1f
commit e52d52ae99
6 changed files with 71 additions and 25 deletions
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3
src/main/scala/tilelink/Monitor.scala
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@ -442,7 +442,8 @@ class TLMonitor(args: TLMonitorArgs) extends TLMonitorBase(args)
inflight := (inflight | a_set) & ~d_clr
val watchdog = RegInit(UInt(0, width = 32))
val limit = PlusArg("tilelink_timeout")
val limit = PlusArg("tilelink_timeout",
docstring="Kill emulation after INT waiting TileLink cycles. Off if 0.")
assert (!inflight.orR || limit === UInt(0) || watchdog < limit, "TileLink timeout expired" + extra)
watchdog := watchdog + UInt(1)