src/mem/slicc/ast/StallAndWaitStatementAST.py

   1 # Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
   2 # Copyright (c) 2009 The Hewlett-Packard Development Company
   3 # Copyright (c) 2010 Advanced Micro Devices, Inc.
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions are
   8 # met: redistributions of source code must retain the above copyright
   9 # notice, this list of conditions and the following disclaimer;
  10 # redistributions in binary form must reproduce the above copyright
  11 # notice, this list of conditions and the following disclaimer in the
  12 # documentation and/or other materials provided with the distribution;
  13 # neither the name of the copyright holders nor the names of its
  14 # contributors may be used to endorse or promote products derived from
  15 # this software without specific prior written permission.
  16 #
  17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28
  29 from slicc.ast.StatementAST import StatementAST
  30
  31 class StallAndWaitStatementAST(StatementAST):
  32     def __init__(self, slicc, in_port, address):
  33         super(StatementAST, self).__init__(slicc)
  34         self.in_port = in_port
  35         self.address = address
  36
  37     def __repr__(self):
  38         return "[StallAndWaitStatementAst: %r]" % self.variable
  39
  40     def generate(self, code, return_type):
  41         self.in_port.assertType("InPort")
  42         self.address.assertType("Address")
  43
  44         in_port_code = self.in_port.var.code
  45         address_code = self.address.var.code
  46         code('''
  47         stallBuffer(&($in_port_code), $address_code);
  48         $in_port_code.stallMessage($address_code);
  49         ''')