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