sim/smt.hh

   1 /*
   2  * Copyright (c) 2003 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
  29 /**
  30  * @file
  31  * Defines SMT_MAX_CPUS and SMT_MAX_THREADS.
  32  */
  33
  34 #ifndef __SMT_HH__
  35 #define __SMT_HH__
  36
  37 #ifndef SMT_MAX_CPUS
  38 /** The maximum number of cpus in any one system. */
  39 #define SMT_MAX_CPUS 4
  40 #endif
  41
  42 #ifndef SMT_MAX_THREADS
  43 /** The number of TPUs in any processor. */
  44 #define SMT_MAX_THREADS 4
  45 #endif
  46
  47 /**
  48  * The maximum number of active threads across all cpus. Used to
  49  * initialize per-thread statistics in the cache.
  50  *
  51  * NB: Be careful to only use it once all the CPUs that you care about
  52  *     have been initialized
  53  */
  54 extern int maxThreadsPerCPU;
  55
  56 /**
  57  * Changes the status and priority of the thread with the given number.
  58  * @param thread_number The thread to change.
  59  * @param activate The new active status.
  60  * @param priority The new priority.
  61  */
  62 void change_thread_state(int thread_number, int activate, int priority);
  63
  64 #endif // __SMT_HH__