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/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#ifndef __ARCH_SPARC_ISA_TRAITS_HH__
#define __ARCH_SPARC_ISA_TRAITS_HH__
#include "arch/sparc/types.hh"
#include "base/misc.hh"
#include "config/full_system.hh"
#include "sim/host.hh"
class ThreadContext;
class FastCPU;
//class FullCPU;
class Checkpoint;
class StaticInst;
class StaticInstPtr;
namespace BigEndianGuest {}
#if FULL_SYSTEM
#include "arch/sparc/isa_fullsys_traits.hh"
#endif
namespace SparcISA
{
class RegFile;
//This makes sure the big endian versions of certain functions are used.
using namespace BigEndianGuest;
// SPARC has a delay slot
#define ISA_HAS_DELAY_SLOT 1
// SPARC NOP (sethi %(hi(0), g0)
const MachInst NoopMachInst = 0x01000000;
const int NumRegularIntRegs = 32;
const int NumMicroIntRegs = 1;
const int NumIntRegs =
NumRegularIntRegs +
NumMicroIntRegs;
const int NumFloatRegs = 64;
const int NumMiscRegs = 40;
// These enumerate all the registers for dependence tracking.
enum DependenceTags {
// 0..31 are the integer regs 0..31
// 32..95 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
FP_Base_DepTag = NumIntRegs,
Ctrl_Base_DepTag = NumIntRegs + NumMicroIntRegs + NumFloatRegs,
};
// MAXTL - maximum trap level
const int MaxPTL = 2;
const int MaxTL = 6;
const int MaxGL = 3;
const int MaxPGL = 2;
// NWINDOWS - number of register windows, can be 3 to 32
const int NWindows = 8;
// semantically meaningful register indices
const int ZeroReg = 0; // architecturally meaningful
// the rest of these depend on the ABI
const int StackPointerReg = 14;
const int ReturnAddressReg = 31; // post call, precall is 15
const int ReturnValueReg = 8; // Post return, 24 is pre-return.
const int FramePointerReg = 30;
const int ArgumentReg0 = 8;
const int ArgumentReg1 = 9;
const int ArgumentReg2 = 10;
const int ArgumentReg3 = 11;
const int ArgumentReg4 = 12;
const int ArgumentReg5 = 13;
// Some OS syscall use a second register (o1) to return a second value
const int SyscallPseudoReturnReg = ArgumentReg1;
//XXX These numbers are bogus
const int MaxInstSrcRegs = 8;
const int MaxInstDestRegs = 9;
//8K. This value is implmentation specific; and should probably
//be somewhere else.
const int LogVMPageSize = 13;
const int VMPageSize = (1 << LogVMPageSize);
//Why does both the previous set of constants and this one exist?
const int PageShift = 13;
const int PageBytes = ULL(1) << PageShift;
const int BranchPredAddrShiftAmt = 2;
const int MachineBytes = 8;
const int WordBytes = 4;
const int HalfwordBytes = 2;
const int ByteBytes = 1;
void serialize(std::ostream & os);
void unserialize(Checkpoint *cp, const std::string §ion);
StaticInstPtr decodeInst(ExtMachInst);
// return a no-op instruction... used for instruction fetch faults
extern const MachInst NoopMachInst;
}
#endif // __ARCH_SPARC_ISA_TRAITS_HH__
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