src/arch/sparc/isa_traits.hh

   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: Gabe Black
  29  *          Ali Saidi
  30  */
  31
  32 #ifndef __ARCH_SPARC_ISA_TRAITS_HH__
  33 #define __ARCH_SPARC_ISA_TRAITS_HH__
  34
  35 #include "arch/sparc/types.hh"
  36 #include "arch/sparc/sparc_traits.hh"
  37 #include "config/full_system.hh"
  38 #include "sim/host.hh"
  39
  40 class StaticInstPtr;
  41
  42 namespace BigEndianGuest {}
  43
  44 namespace SparcISA
  45 {
  46     class RegFile;
  47
  48     const int MachineBytes = 8;
  49
  50     //This makes sure the big endian versions of certain functions are used.
  51     using namespace BigEndianGuest;
  52
  53     // SPARC has a delay slot
  54     #define ISA_HAS_DELAY_SLOT 1
  55
  56     // SPARC NOP (sethi %(hi(0), g0)
  57     const MachInst NoopMachInst = 0x01000000;
  58
  59     // These enumerate all the registers for dependence tracking.
  60     enum DependenceTags {
  61         FP_Base_DepTag = 32*3+8,
  62         Ctrl_Base_DepTag = FP_Base_DepTag + 64
  63     };
  64
  65     // semantically meaningful register indices
  66     const int ZeroReg = 0;      // architecturally meaningful
  67     // the rest of these depend on the ABI
  68     const int StackPointerReg = 14;
  69     const int ReturnAddressReg = 31; // post call, precall is 15
  70     const int ReturnValueReg = 8; // Post return, 24 is pre-return.
  71     const int FramePointerReg = 30;
  72     const int ArgumentReg0 = 8;
  73     const int ArgumentReg1 = 9;
  74     const int ArgumentReg2 = 10;
  75     const int ArgumentReg3 = 11;
  76     const int ArgumentReg4 = 12;
  77     const int ArgumentReg5 = 13;
  78     // Some OS syscall use a second register (o1) to return a second value
  79     const int SyscallPseudoReturnReg = ArgumentReg1;
  80
  81     //XXX These numbers are bogus
  82     const int MaxInstSrcRegs = 8;
  83     const int MaxInstDestRegs = 9;
  84
  85     //8K. This value is implmentation specific; and should probably
  86     //be somewhere else.
  87     const int LogVMPageSize = 13;
  88     const int VMPageSize = (1 << LogVMPageSize);
  89
  90     //Why does both the previous set of constants and this one exist?
  91     const int PageShift = 13;
  92     const int PageBytes = 1ULL << PageShift;
  93
  94     const int BranchPredAddrShiftAmt = 2;
  95
  96     StaticInstPtr decodeInst(ExtMachInst);
  97
  98 #if FULL_SYSTEM
  99     // I don't know what it's for, so I don't
 100     // know what SPARC's value should be
 101     // For loading... XXX This maybe could be USegEnd?? --ali
 102     const Addr LoadAddrMask = ULL(0xffffffffff);
 103
 104     /////////// TLB Stuff ////////////
 105     const Addr StartVAddrHole = ULL(0x0000800000000000);
 106     const Addr EndVAddrHole = ULL(0xFFFF7FFFFFFFFFFF);
 107     const Addr VAddrAMask = ULL(0xFFFFFFFF);
 108     const Addr PAddrImplMask = ULL(0x000000FFFFFFFFFF);
 109     const Addr BytesInPageMask = ULL(0x1FFF);
 110
 111 #endif
 112 }
 113
 114 #endif // __ARCH_SPARC_ISA_TRAITS_HH__