src/arch/mips/linux/system.cc

   1 /*
   2  * Copyright (c) 2004-2006 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
  29 /**
  30  * @file
  31  * This code loads the linux kernel, console, pal and patches certain
  32  * functions.  The symbol tables are loaded so that traces can show
  33  * the executing function and we can skip functions. Various delay
  34  * loops are skipped and their final values manually computed to speed
  35  * up boot time.
  36  */
  37
  38 #include "arch/mips/linux/system.hh"
  39
  40 #include "arch/generic/linux/threadinfo.hh"
  41 #include "arch/mips/idle_event.hh"
  42 #include "arch/mips/system.hh"
  43 #include "base/loader/symtab.hh"
  44 #include "cpu/base.hh"
  45 #include "cpu/thread_context.hh"
  46 #include "debug/Thread.hh"
  47 #include "dev/platform.hh"
  48 #include "kern/linux/events.hh"
  49 #include "kern/linux/printk.hh"
  50 #include "mem/physical.hh"
  51 #include "mem/port.hh"
  52 #include "sim/arguments.hh"
  53 #include "sim/byteswap.hh"
  54
  55 using namespace std;
  56 using namespace MipsISA;
  57 using namespace Linux;
  58
  59 LinuxMipsSystem::LinuxMipsSystem(Params *p)
  60     : MipsSystem(p)
  61 {
  62 }
  63
  64 LinuxMipsSystem::~LinuxMipsSystem()
  65 {
  66 }
  67
  68
  69 void
  70 LinuxMipsSystem::setDelayLoop(ThreadContext *tc)
  71 {
  72     panic("setDelayLoop not implemented.\n");
  73 }
  74
  75
  76 void
  77 LinuxMipsSystem::SkipDelayLoop::process(ThreadContext *tc)
  78 {
  79     MipsISA::SkipFunc::process(tc);
  80     // calculate and set loops_per_jiffy
  81     ((LinuxMipsSystem *)tc->getSystemPtr())->setDelayLoop(tc);
  82 }
  83
  84 void
  85 LinuxMipsSystem::PrintThreadInfo::process(ThreadContext *tc)
  86 {
  87     Linux::ThreadInfo ti(tc);
  88
  89     DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
  90             ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
  91 }
  92
  93 LinuxMipsSystem *
  94 LinuxMipsSystemParams::create()
  95 {
  96     return new LinuxMipsSystem(this);
  97 }