fix(cpp): re-add functions deleted by #584 (#681)

fixes #678

Author: dhower-qc

.github/workflows/regress.yml

@@ -182,4 +182,4 @@ jobs:
       - name: singularity setup
         uses: ./.github/actions/singularity-setup
       - name: Run cpp unit tests
-        run: ./do test:cpp_hart CONFIG=rv64
+        run: ./do test:cpp_hart CONFIG=rv64 JOBS=4

backends/cpp_hart_gen/tasks.rake

@@ -133,7 +133,7 @@ rule %r{#{CPP_HART_GEN_DST}/.*/include/udb/cfgs/[^/]+/[^/]+\.h(xx)?\.unformatted
     "#{CPP_HART_GEN_SRC}/lib/gen_cpp.rb",
     "#{$root}/lib/idl/passes/prune.rb",
     "#{CPP_HART_GEN_SRC}/lib/template_helpers.rb",
-    "#{CPP_HART_GEN_SRC}/lib/csr_backend_helpers.rb",
+    "#{CPP_HART_GEN_SRC}/lib/csr_template_helpers.rb",
     __FILE__
   ]
 } do |t|
@@ -167,7 +167,7 @@ rule %r{#{CPP_HART_GEN_DST}/.*/src/cfgs/[^/]+/[^/]+\.cxx\.unformatted$} => proc
     "#{CPP_HART_GEN_SRC}/lib/gen_cpp.rb",
     "#{$root}/lib/idl/passes/prune.rb",
     "#{CPP_HART_GEN_SRC}/lib/template_helpers.rb",
-    "#{CPP_HART_GEN_SRC}/lib/csr_backend_helpers.rb",
+    "#{CPP_HART_GEN_SRC}/lib/csr_template_helpers.rb",
     __FILE__
   ]
 } do |t|

lib/arch_obj_models/parameter.rb

@@ -36,6 +36,13 @@ def schema_type
     @schema.to_pretty_s
   end
 
+  # @returns [Object] default value, or nil if none
+  def default
+    if @data["schema"].key?("default")
+      @data["schema"]["default"]
+    end
+  end
+
   # @param ext [Extension]
   # @param name [String]
   # @param data [Hash<String, Object]
@@ -129,6 +136,9 @@ def extra_validation = @param.extra_validation
   # @return [Extension] The extension that defines this parameter
   def exts = @param.exts
 
+  # @returns [Idl::Type] Type of the parameter
+  def idl_type = @param.idl_type
+
   def initialize(param, value)
     @param = param
     @value = value