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 "arch/faults.hh"
  35 #include "arch/isa_traits.hh"
  36 #include "cpu/thread_context.hh"
  37 #include "cpu/thread_state.hh"
  38
  39 class Event;
  40 class Process;
  41
  42 #if FULL_SYSTEM
  43 class EndQuiesceEvent;
  44 class FunctionProfile;
  45 class ProfileNode;
  46 #else
  47 class FunctionalMemory;
  48 class Process;
  49 #endif
  50
  51 /**
  52  * Class that has various thread state, such as the status, the
  53  * current instruction being processed, whether or not the thread has
  54  * a trap pending or is being externally updated, the ThreadContext
  55  * pointer, etc.  It also handles anything related to a specific
  56  * thread's process, such as syscalls and checking valid addresses.
  57  */
  58 template <class Impl>
  59 struct O3ThreadState : public ThreadState {
  60     typedef ThreadContext::Status Status;
  61     typedef typename Impl::FullCPU FullCPU;
  62
  63   private:
  64     /** Pointer to the CPU. */
  65     FullCPU *cpu;
  66   public:
  67     /** Whether or not the thread is currently in syscall mode, and
  68      * thus able to be externally updated without squashing.
  69      */
  70     bool inSyscall;
  71
  72     /** Whether or not the thread is currently waiting on a trap, and
  73      * thus able to be externally updated without squashing.
  74      */
  75     bool trapPending;
  76
  77 #if FULL_SYSTEM
  78     O3ThreadState(FullCPU *_cpu, int _thread_num)
  79         : ThreadState(-1, _thread_num),
  80           inSyscall(0), trapPending(0)
  81     { }
  82 #else
  83     O3ThreadState(FullCPU *_cpu, int _thread_num, Process *_process, int _asid,
  84                   MemObject *mem)
  85         : ThreadState(-1, _thread_num, mem, _process, _asid),
  86           cpu(_cpu), inSyscall(0), trapPending(0)
  87     { }
  88 #endif
  89
  90     /** Pointer to the ThreadContext of this thread. */
  91     ThreadContext *tc;
  92
  93     /** Returns a pointer to the TC of this thread. */
  94     ThreadContext *getTC() { return tc; }
  95
  96 #if !FULL_SYSTEM
  97     /** Handles the syscall. */
  98     void syscall(int64_t callnum) { process->syscall(callnum, tc); }
  99 #endif
 100 };
 101
 102 #endif // __CPU_O3_THREAD_STATE_HH__