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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.
*/
#ifndef __CPU_O3_THREAD_STATE_HH__
#define __CPU_O3_THREAD_STATE_HH__
#include "arch/faults.hh"
#include "arch/isa_traits.hh"
#include "cpu/exec_context.hh"
#include "cpu/thread_state.hh"
class Event;
class Process;
#if FULL_SYSTEM
class EndQuiesceEvent;
class FunctionProfile;
class ProfileNode;
#else
class FunctionalMemory;
class Process;
#endif
/**
* Class that has various thread state, such as the status, the
* current instruction being processed, whether or not the thread has
* a trap pending or is being externally updated, the ExecContext
* proxy pointer, etc. It also handles anything related to a specific
* thread's process, such as syscalls and checking valid addresses.
*/
template <class Impl>
struct O3ThreadState : public ThreadState {
typedef ExecContext::Status Status;
typedef typename Impl::FullCPU FullCPU;
/** Current status of the thread. */
Status _status;
/** Current instruction the thread is committing. Only set and
* used for DTB faults currently.
*/
TheISA::MachInst inst;
private:
/** Pointer to the CPU. */
FullCPU *cpu;
public:
/** Whether or not the thread is currently in syscall mode, and
* thus able to be externally updated without squashing.
*/
bool inSyscall;
/** Whether or not the thread is currently waiting on a trap, and
* thus able to be externally updated without squashing.
*/
bool trapPending;
#if FULL_SYSTEM
O3ThreadState(FullCPU *_cpu, int _thread_num, FunctionalMemory *_mem)
: ThreadState(-1, _thread_num, _mem),
inSyscall(0), trapPending(0)
{ }
#else
O3ThreadState(FullCPU *_cpu, int _thread_num, Process *_process, int _asid)
: ThreadState(-1, _thread_num, NULL, _process, _asid),
cpu(_cpu), inSyscall(0), trapPending(0)
{ }
O3ThreadState(FullCPU *_cpu, int _thread_num, FunctionalMemory *_mem,
int _asid)
: ThreadState(-1, _thread_num, _mem, NULL, _asid),
cpu(_cpu), inSyscall(0), trapPending(0)
{ }
#endif
/** Pointer to the ExecContext of this thread. @todo: Don't call
this a proxy.*/
ExecContext *xcProxy;
/** Returns a pointer to the XC of this thread. */
ExecContext *getXCProxy() { return xcProxy; }
/** Returns the status of this thread. */
Status status() const { return _status; }
/** Sets the status of this thread. */
void setStatus(Status new_status) { _status = new_status; }
/** Sets the current instruction being committed. */
void setInst(TheISA::MachInst _inst) { inst = _inst; }
/** Reads the number of instructions functionally executed and
* committed.
*/
Counter readFuncExeInst() { return funcExeInst; }
/** Sets the total number of instructions functionally executed
* and committed.
*/
void setFuncExeInst(Counter new_val) { funcExeInst = new_val; }
#if !FULL_SYSTEM
/** Handles the syscall. */
void syscall(int64_t callnum) { process->syscall(callnum, xcProxy); }
#endif
};
#endif // __CPU_O3_THREAD_STATE_HH__
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