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/*
* Copyright (c) 2006 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: Kevin Lim
* Korey Sewell
*/
#ifndef __CPU_O3_MIPS_CPU_HH__
#define __CPU_O3_MIPS_CPU_HH__
#include "arch/mips/regfile.hh"
#include "arch/mips/syscallreturn.hh"
#include "cpu/thread_context.hh"
#include "cpu/o3/cpu.hh"
#include "sim/byteswap.hh"
#include "sim/faults.hh"
class EndQuiesceEvent;
namespace Kernel {
class Statistics;
};
class TranslatingPort;
/**
* MipsO3CPU class. Derives from the FullO3CPU class, and
* implements all ISA and implementation specific functions of the
* CPU. This is the CPU class that is used for the SimObjects, and is
* what is given to the DynInsts. Most of its state exists in the
* FullO3CPU; the state is has is mainly for ISA specific
* functionality.
*/
template <class Impl>
class MipsO3CPU : public FullO3CPU<Impl>
{
public:
typedef O3ThreadState<Impl> ImplState;
typedef O3ThreadState<Impl> Thread;
typedef typename Impl::Params Params;
/** Constructs an MipsO3CPU with the given parameters. */
MipsO3CPU(Params *params);
/** Registers statistics. */
void regStats();
/** Translates instruction requestion in syscall emulation mode. */
Fault translateInstReq(RequestPtr &req, Thread *thread)
{
return thread->getProcessPtr()->pTable->translate(req);
}
/** Translates data read request in syscall emulation mode. */
Fault translateDataReadReq(RequestPtr &req, Thread *thread)
{
return thread->getProcessPtr()->pTable->translate(req);
}
/** Translates data write request in syscall emulation mode. */
Fault translateDataWriteReq(RequestPtr &req, Thread *thread)
{
return thread->getProcessPtr()->pTable->translate(req);
}
/** Reads a miscellaneous register. */
TheISA::MiscReg readMiscRegNoEffect(int misc_reg, unsigned tid);
/** Reads a misc. register, including any side effects the read
* might have as defined by the architecture.
*/
TheISA::MiscReg readMiscReg(int misc_reg, unsigned tid);
/** Sets a miscellaneous register. */
void setMiscRegNoEffect(int misc_reg, const TheISA::MiscReg &val, unsigned tid);
/** Sets a misc. register, including any side effects the write
* might have as defined by the architecture.
*/
void setMiscReg(int misc_reg,
const TheISA::MiscReg &val, unsigned tid);
/** Initiates a squash of all in-flight instructions for a given
* thread. The source of the squash is an external update of
* state through the TC.
*/
void squashFromTC(unsigned tid);
/** Traps to handle given fault. */
void trap(Fault fault, unsigned tid);
/** Executes a syscall.
* @todo: Determine if this needs to be virtual.
*/
void syscall(int64_t callnum, int tid);
/** Gets a syscall argument. */
TheISA::IntReg getSyscallArg(int i, int tid);
/** Used to shift args for indirect syscall. */
void setSyscallArg(int i, TheISA::IntReg val, int tid);
/** Sets the return value of a syscall. */
void setSyscallReturn(SyscallReturn return_value, int tid);
/** CPU read function, forwards read to LSQ. */
template <class T>
Fault read(RequestPtr &req, T &data, int load_idx)
{
return this->iew.ldstQueue.read(req, data, load_idx);
}
/** CPU write function, forwards write to LSQ. */
template <class T>
Fault write(RequestPtr &req, T &data, int store_idx)
{
return this->iew.ldstQueue.write(req, data, store_idx);
}
Addr lockAddr;
/** Temporary fix for the lock flag, works in the UP case. */
bool lockFlag;
};
#endif // __CPU_O3_MIPS_CPU_HH__
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