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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
*/
#ifndef __CPU_INORDER_THREAD_STATE_HH__
#define __CPU_INORDER_THREAD_STATE_HH__
#include "arch/faults.hh"
#include "arch/isa_traits.hh"
#include "base/callback.hh"
#include "base/output.hh"
#include "cpu/thread_context.hh"
#include "cpu/thread_state.hh"
#include "sim/sim_exit.hh"
class Event;
class InOrderCPU;
#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 ThreadContext
* pointer, etc. It also handles anything related to a specific
* thread's process, such as syscalls and checking valid addresses.
*/
class InOrderThreadState : public ThreadState {
typedef ThreadContext::Status Status;
private:
/** Pointer to the CPU. */
InOrderCPU *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
InOrderThreadState(InOrderCPU *_cpu, ThreadID _thread_num)
: ThreadState(reinterpret_cast<BaseCPU*>(_cpu), _thread_num),
cpu(_cpu), inSyscall(0), trapPending(0), lastGradIsBranch(false)
{ }
#else
InOrderThreadState(InOrderCPU *_cpu, ThreadID _thread_num,
Process *_process)
: ThreadState(reinterpret_cast<BaseCPU*>(_cpu), _thread_num,
_process),
cpu(_cpu), inSyscall(0), trapPending(0), lastGradIsBranch(false)
{ }
#endif
#if !FULL_SYSTEM
/** Handles the syscall. */
void syscall(int64_t callnum) { process->syscall(callnum, tc); }
#endif
#if FULL_SYSTEM
void dumpFuncProfile();
#endif
/** Pointer to the ThreadContext of this thread. */
ThreadContext *tc;
/** Returns a pointer to the TC of this thread. */
ThreadContext *getTC() { return tc; }
/** Return the thread id */
int readTid() { return threadId(); }
/** Is last instruction graduated a branch? */
bool lastGradIsBranch;
TheISA::PCState lastBranchPC;
};
#endif // __CPU_INORDER_THREAD_STATE_HH__
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