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