src/arch/alpha/utility.cc

   1 /*
   2  * Copyright (c) 2003-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  *          Ali Saidi
  30  */
  31
  32 #include "arch/alpha/utility.hh"
  33
  34 #if FULL_SYSTEM
  35 #include "arch/alpha/vtophys.hh"
  36 #include "mem/vport.hh"
  37 #endif
  38
  39 namespace AlphaISA {
  40
  41 uint64_t
  42 getArgument(ThreadContext *tc, int number, bool fp)
  43 {
  44 #if FULL_SYSTEM
  45     const int NumArgumentRegs = 6;
  46     if (number < NumArgumentRegs) {
  47         if (fp)
  48             return tc->readFloatRegBits(16 + number);
  49         else
  50             return tc->readIntReg(16 + number);
  51     } else {
  52         Addr sp = tc->readIntReg(StackPointerReg);
  53         VirtualPort *vp = tc->getVirtPort();
  54         uint64_t arg = vp->read<uint64_t>(sp +
  55                            (number-NumArgumentRegs) * sizeof(uint64_t));
  56         return arg;
  57     }
  58 #else
  59     panic("getArgument() is Full system only\n");
  60     M5_DUMMY_RETURN;
  61 #endif
  62 }
  63
  64 } // namespace AlphaISA
  65