Move to a regression Makefile

In order to have the buildbot support various types of failures it needs
to run different commands.  Rather than modifying the regression script
to have a bunch of arguments I've just gone and made a makefile for
regressions instead.

This doesn't run torture right now because that's broken, but I'll add
support soon.

regression.sh

@@ -1,52 +0,0 @@
-#! /bin/bash
-#
-# See LICENSE for license details.
-
-# Script to setup submodules, build rocket-chip, and run asm tests, and optionally run torture
-
-set -ex
-
-echo "Starting Rocket-chip regression test"
-if [ $# -lt 1 ]
-then
-  echo "Usage: ./regression.sh [options] config [torture_config] [torture_output_dir]"
-  echo "  --master: A comma-seperated list of repositories to use the master of"
-  exit
-fi
-
-git submodule update --init --recursive riscv-tools
-
-if [[ "$1" == "--master" ]]
-then
-  echo $2 | sed 's/,/\n/g' | while read repo
-  do
-    (
-      cd $repo
-      git fetch
-      git checkout master
-      git log --oneline | head -n5
-    )
-  done
-
-  shift
-  shift
-fi
-
-export RISCV="$(pwd)/install"; export PATH=$PATH:$RISCV/bin
-cd riscv-tools; ./build.sh; cd ..
-git submodule update --init 
-git submodule status --recursive
-cd emulator; make CONFIG=$1; make CONFIG=$1 run-asm-tests; cd ..
-if [ $# -ge 2 ]
-then
-  cd emulator; make CONFIG=$1 debug; cd ..
-  git clone git@github.com:ucb-bar/riscv-torture.git
-  cd riscv-torture; git submodule update --init;
-  if [ $# -eq 3 ]
-  then
-    make cnight RTL_CONFIG=$1 OPTIONS="-C $2 -p $3 -m 30 -t 10"
-  else
-    make cnight RTL_CONFIG=$1 OPTIONS="-C $2 -m 30 -t 10"
-  fi
-fi
-

regression/.gitignore

@@ -0,0 +1,2 @@
+/install
+/stamps

regression/Makefile

@@ -0,0 +1,51 @@
+# The default target
+regression: vsim-asm-tests vsim-bmark-tests torture
+
+ifeq ($(CONFIG),)
+$(error Set CONFIG to the configuration to build)
+endif
+
+# The top-level directory that contains rocket-chip
+TOP ?= ..
+
+# The directory that the tools get built into.
+RISCV ?= install
+
+# These are the named regression targets.  While it's expected you run them in
+# this order, since there's dependencies for everything it doesn't actually
+# matter.
+submodules: stamps/submodules.stamp
+tools: stamps/tools.stamp
+vsim: stamps/vsim.stamp
+vsim-asm-tests: stamps/vsim-asm-tests.stamp
+vsim-bmark-tests: stamps/vsim-bmark-tests.stamp
+torture: stamps/torture.stamp
+
+# Checks out all the rocket-chip submodules
+stamps/submodules.stamp:
+	mkdir -p $(dir $@)
+	git -C $(abspath $(TOP)) submodule update --init --recursive
+	touch $@
+
+# Builds the RISC-V toolchain
+stamps/tools.stamp: stamps/submodules.stamp
+	mkdir -p $(dir $@)
+	+cd $(abspath $(TOP))/riscv-tools; RISCV=$(abspath $(RISCV)) ./build.sh
+	touch $@
+
+# Builds the verilog RTL simulator
+stamps/vsim.stamp: stamps/submodules.stamp
+	mkdir -p $(dir $@)
+	$(MAKE) -C $(abspath $(TOP))/vsim CONFIG=$(CONFIG) RISCV=$(abspath $(RISCV))
+	touch $@
+
+# Runs some tests using the verilog RTL simulator
+stamps/vsim-asm-tests.stamp: stamps/vsim.stamp stamps/tools.stamp stamps/submodules.stamp
+	mkdir -p $(dir $@)
+	$(MAKE) -C $(abspath $(TOP))/vsim CONFIG=$(CONFIG) RISCV=$(abspath $(RISCV)) run-asm-tests
+	touch $@
+
+stamps/vsim-bmark-tests.stamp: stamps/vsim.stamp stamps/tools.stamp stamps/submodules.stamp
+	mkdir -p $(dir $@)
+	$(MAKE) -C $(abspath $(TOP))/vsim CONFIG=$(CONFIG) RISCV=$(abspath $(RISCV)) run-bmark-tests
+	touch $@