src/cpu/o3/thread_state.hh

   1 /*
   2  * Copyright (c) 2006 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: Kevin Lim
  29  */
  30
  31 #ifndef __CPU_O3_THREAD_STATE_HH__
  32 #define __CPU_O3_THREAD_STATE_HH__
  33
  34 #include "cpu/thread_context.hh"
  35 #include "cpu/thread_state.hh"
  36
  37 class Event;
  38 class Process;
  39
  40 #if FULL_SYSTEM
  41 class EndQuiesceEvent;
  42 class FunctionProfile;
  43 class ProfileNode;
  44 #else
  45 class FunctionalMemory;
  46 class Process;
  47 #endif
  48
  49 /**
  50  * Class that has various thread state, such as the status, the
  51  * current instruction being processed, whether or not the thread has
  52  * a trap pending or is being externally updated, the ThreadContext
  53  * pointer, etc.  It also handles anything related to a specific
  54  * thread's process, such as syscalls and checking valid addresses.
  55  */
  56 template <class Impl>
  57 struct O3ThreadState : public ThreadState {
  58     typedef ThreadContext::Status Status;
  59     typedef typename Impl::O3CPU O3CPU;
  60
  61   private:
  62     /** Pointer to the CPU. */
  63     O3CPU *cpu;
  64   public:
  65     /** Whether or not the thread is currently in syscall mode, and
  66      * thus able to be externally updated without squashing.
  67      */
  68     bool inSyscall;
  69
  70     /** Whether or not the thread is currently waiting on a trap, and
  71      * thus able to be externally updated without squashing.
  72      */
  73     bool trapPending;
  74
  75 #if FULL_SYSTEM
  76     O3ThreadState(O3CPU *_cpu, int _thread_num)
  77         : ThreadState(-1, _thread_num),
  78           inSyscall(0), trapPending(0)
  79     { }
  80 #else
  81     O3ThreadState(O3CPU *_cpu, int _thread_num, Process *_process, int _asid,
  82                   MemObject *mem)
  83         : ThreadState(-1, _thread_num, _process, _asid, mem),
  84           cpu(_cpu), inSyscall(0), trapPending(0)
  85     { }
  86 #endif
  87
  88     /** Pointer to the ThreadContext of this thread. */
  89     ThreadContext *tc;
  90
  91     /** Returns a pointer to the TC of this thread. */
  92     ThreadContext *getTC() { return tc; }
  93
  94 #if !FULL_SYSTEM
  95     /** Handles the syscall. */
  96     void syscall(int64_t callnum) { process->syscall(callnum, tc); }
  97 #endif
  98 };
  99
 100 #endif // __CPU_O3_THREAD_STATE_HH__