src/arch/x86/isa/rom.isa

   1 // Copyright (c) 2008 The Regents of The University of Michigan
   2 // All rights reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are
   6 // met: redistributions of source code must retain the above copyright
   7 // notice, this list of conditions and the following disclaimer;
   8 // redistributions in binary form must reproduce the above copyright
   9 // notice, this list of conditions and the following disclaimer in the
  10 // documentation and/or other materials provided with the distribution;
  11 // neither the name of the copyright holders nor the names of its
  12 // contributors may be used to endorse or promote products derived from
  13 // this software without specific prior written permission.
  14 //
  15 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 //
  27 // Authors: Gabe Black
  28
  29 def template MicroRomConstructor {{
  30
  31     %(define_generators)s
  32     const MicroPC X86ISA::MicrocodeRom::numMicroops = %(num_microops)s;
  33
  34     X86ISA::MicrocodeRom::MicrocodeRom()
  35     {
  36         using namespace RomLabels;
  37         genFuncs = new GenFunc[numMicroops];
  38         %(alloc_generators)s;
  39     }
  40 }};
  41
  42 let {{
  43     from micro_asm import Rom
  44
  45     class X86MicrocodeRom(Rom):
  46         def __init__(self, name):
  47             super(X86MicrocodeRom, self).__init__(name)
  48             self.directives = {}
  49
  50         def add_microop(self, mnemonic, microop):
  51             microop.mnemonic = mnemonic
  52             microop.micropc = len(self.microops)
  53             self.microops.append(microop)
  54
  55
  56         def getDeclaration(self):
  57             declareLabels = "namespace RomLabels {\n"
  58             for (label, microop) in self.labels.items():
  59                 declareLabels += "const static uint64_t label_%s = %d;\n" \
  60                                   % (label, microop.micropc)
  61             for (label, microop) in self.externs.items():
  62                 declareLabels += \
  63                     "const static MicroPC extern_label_%s = %d;\n" \
  64                         % (label, microop.micropc)
  65             declareLabels += "}\n"
  66             return declareLabels;
  67
  68         def getDefinition(self):
  69             numMicroops = len(self.microops)
  70             allocGenerators = ''
  71             micropc = 0
  72             define_generators = '''
  73                 namespace
  74                 {
  75                     static const char romMnemonic[] = "Microcode_ROM";
  76             '''
  77             for op in self.microops:
  78                 define_generators += op.getGeneratorDef(micropc)
  79                 allocGenerators += "genFuncs[%d] = %s;\n" % \
  80                         (micropc, op.getGenerator(micropc))
  81                 micropc += 1
  82             define_generators += "}\n"
  83             iop = InstObjParams(self.name, self.name, "MicrocodeRom",
  84                                 {"code" : "",
  85                                  "define_generators" : define_generators,
  86                                  "num_microops" : numMicroops,
  87                                  "alloc_generators" : allocGenerators
  88                                 })
  89             return MicroRomConstructor.subst(iop);
  90 }};