src/arch/mips/linux/system.hh

   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  * Authors: Ali Saidi
  29  *          Lisa Hsu
  30  *          Nathan Binkert
  31  */
  32
  33 #ifndef __ARCH_MIPS_LINUX_SYSTEM_HH__
  34 #define __ARCH_MIPS_LINUX_SYSTEM_HH__
  35
  36 class ThreadContext;
  37
  38 class BreakPCEvent;
  39 class IdleStartEvent;
  40
  41 #include "arch/mips/idle_event.hh"
  42 #include "arch/mips/system.hh"
  43 #include "kern/linux/events.hh"
  44 #include "params/LinuxMipsSystem.hh"
  45
  46 /**
  47  * This class contains linux specific system code (Loading, Events).
  48  * It points to objects that are the system binaries to load and patches them
  49  * appropriately to work in simulator.
  50  */
  51 class LinuxMipsSystem : public MipsSystem
  52 {
  53   private:
  54     class SkipDelayLoopEvent : public SkipFuncEvent
  55     {
  56       public:
  57         SkipDelayLoopEvent(PCEventScope *s, const std::string &desc, Addr addr)
  58             : SkipFuncEvent(s, desc, addr) {}
  59         virtual void process(ThreadContext *tc);
  60     };
  61
  62     class PrintThreadInfo : public PCEvent
  63     {
  64       public:
  65         PrintThreadInfo(PCEventScope *s, const std::string &desc, Addr addr)
  66             : PCEvent(s, desc, addr) {}
  67         virtual void process(ThreadContext *tc);
  68     };
  69
  70
  71     /**
  72      * Addresses defining where the kernel bootloader places various
  73      * elements.  Details found in include/asm-mips/system.h
  74      */
  75     Addr KernelStart; // Lookup the symbol swapper_pg_dir
  76
  77   public:
  78     Addr InitStack() const { return KernelStart + 0x02000; }
  79     Addr EmptyPGT() const  { return KernelStart + 0x04000; }
  80     Addr EmptyPGE() const  { return KernelStart + 0x08000; }
  81     Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
  82     Addr StartAddr() const { return KernelStart + 0x10000; }
  83
  84     Addr Param() const { return ZeroPGE() + 0x0; }
  85     Addr CommandLine() const { return Param() + 0x0; }
  86     Addr InitrdStart() const { return Param() + 0x100; }
  87     Addr InitrdSize() const { return Param() + 0x108; }
  88     static const int CommandLineSize = 256;
  89
  90   public:
  91     typedef LinuxMipsSystemParams Params;
  92     LinuxMipsSystem(Params *p);
  93     ~LinuxMipsSystem();
  94
  95     void setDelayLoop(ThreadContext *tc);
  96 };
  97
  98 #endif // __ARCH_MIPS_LINUX_SYSTEM_HH__