1 files changed, 130 insertions, 0 deletions
diff --git a/src/mem/slicc/ast/InPortDeclAST.py b/src/mem/slicc/ast/InPortDeclAST.py
new file mode 100644
index 000000000..3dde24557
--- /dev/null
+++ b/src/mem/slicc/ast/InPortDeclAST.py
@@ -0,0 +1,130 @@
+# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+# Copyright (c) 2009 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from m5.util import code_formatter
+
+from slicc.ast.DeclAST import DeclAST
+from slicc.ast.TypeAST import TypeAST
+from slicc.symbols import Func, Type, Var
+
+class InPortDeclAST(DeclAST):
+    def __init__(self, slicc, ident, msg_type, var_expr, pairs, statements):
+        super(InPortDeclAST, self).__init__(slicc, pairs)
+
+        self.ident = ident
+        self.msg_type = msg_type
+        self.var_expr = var_expr
+        self.statements = statements
+        self.queue_type = TypeAST(slicc, "InPort")
+
+    def __repr__(self):
+        return "[InPortDecl: %s]" % self.ident
+
+    def generate(self):
+        symtab = self.symtab
+        void_type = symtab.find("void", Type)
+
+        code = code_formatter()
+        queue_type = self.var_expr.generate(code)
+        if not queue_type.isInPort:
+            self.error("The inport queue's type must have the 'inport' " + \
+                       "attribute.  Type '%s' does not have this attribute.",
+                       queue_type)
+
+        type = self.queue_type.type
+        in_port = Var(self.symtab, self.ident, self.location, type, str(code),
+                      self.pairs)
+        symtab.newSymbol(in_port)
+
+        symtab.pushFrame()
+        param_types = []
+
+        # Check for Event
+        type = symtab.find("Event", Type)
+        if type is None:
+            self.error("in_port decls require 'Event' enumeration defined")
+        param_types.append(type)
+
+        # Check for Address
+        type = symtab.find("Address", Type)
+        if type is None:
+            self.error("in_port decls require 'Address' type to be defined")
+
+        param_types.append(type)
+
+        # Add the trigger method - FIXME, this is a bit dirty
+        pairs = { "external" : "yes" }
+        func = Func(self.symtab, "trigger", self.location, void_type,
+                    param_types, [], "", pairs, None)
+        symtab.newSymbol(func)
+
+        param_types = []
+        # Check for Event2
+        type = symtab.find("Event", Type)
+        if type is None:
+            self.error("in_port decls require 'Event' enumeration")
+
+        param_types.append(type)
+
+        # Check for Address2
+        type = symtab.find("Address", Type)
+        if type is None:
+            self.error("in_port decls require 'Address' type to be defined")
+
+        param_types.append(type)
+
+        # Add the doubleTrigger method - this hack supports tiggering
+        # two simulateous events
+        #
+        # The key is that the second transistion cannot fail because
+        # the first event cannot be undone therefore you must do some
+        # checks before calling double trigger to ensure that won't
+        # happen
+        func = Func(self.symtab, "doubleTrigger", self.location, void_type,
+                    param_types, [], "", pairs, None)
+        symtab.newSymbol(func)
+
+        # Add the continueProcessing method - this hack supports
+        # messages that don't trigger events
+        func = Func(self.symtab, "continueProcessing", self.location,
+                    void_type, [], [], "", pairs, None)
+        symtab.newSymbol(func)
+
+        if self.statements is not None:
+            rcode = code_formatter()
+            rcode.indent()
+            rcode.indent()
+            self.statements.generate(rcode, None)
+            in_port["c_code_in_port"] = str(rcode)
+        symtab.popFrame()
+
+        # Add port to state machine
+        machine = symtab.state_machine
+        if machine is None:
+            self.error("InPort declaration not part of a machine.")
+
+        machine.addInPort(in_port)