kern/linux/linux_system.hh

   1 /*
   2  * Copyright (c) 2004-2005 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 __KERN_LINUX_LINUX_SYSTEM_HH__
  30 #define __KERN_LINUX_LINUX_SYSTEM_HH__
  31
  32 class ExecContext;
  33
  34 class BreakPCEvent;
  35 class IdleStartEvent;
  36 class PrintThreadInfo;
  37
  38 /**
  39  * This class contains linux specific system code (Loading, Events, Binning).
  40  * It points to objects that are the system binaries to load and patches them
  41  * appropriately to work in simulator.
  42  */
  43 class LinuxSystem : public System
  44 {
  45   private:
  46     class SkipDelayLoopEvent : public SkipFuncEvent
  47     {
  48       public:
  49         SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
  50             : SkipFuncEvent(q, desc, addr) {}
  51         virtual void process(ExecContext *xc);
  52     };
  53
  54     class DebugPrintkEvent : public SkipFuncEvent
  55     {
  56       private:
  57         bool raw;
  58
  59       public:
  60         DebugPrintkEvent(PCEventQueue *q, const std::string &desc, Addr addr,
  61                          bool r = false)
  62             : SkipFuncEvent(q, desc, addr), raw(r) {}
  63         virtual void process(ExecContext *xc);
  64     };
  65
  66     class PrintThreadInfo : public PCEvent
  67     {
  68       public:
  69         PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
  70             : PCEvent(q, desc, addr) {}
  71         virtual void process(ExecContext *xc);
  72     };
  73
  74     /**
  75      * Addresses defining where the kernel bootloader places various
  76      * elements.  Details found in include/asm-alpha/system.h
  77      */
  78     Addr KernelStart; // Lookup the symbol swapper_pg_dir
  79
  80   public:
  81     Addr InitStack() const { return KernelStart + 0x02000; }
  82     Addr EmptyPGT() const  { return KernelStart + 0x04000; }
  83     Addr EmptyPGE() const  { return KernelStart + 0x08000; }
  84     Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
  85     Addr StartAddr() const { return KernelStart + 0x10000; }
  86
  87     Addr Param() const { return ZeroPGE() + 0x0; }
  88     Addr CommandLine() const { return Param() + 0x0; }
  89     Addr InitrdStart() const { return Param() + 0x100; }
  90     Addr InitrdSize() const { return Param() + 0x108; }
  91     static const int CommandLineSize = 256;
  92
  93   private:
  94 #ifndef NDEBUG
  95     /** Event to halt the simulator if the kernel calls panic()  */
  96     BreakPCEvent *kernelPanicEvent;
  97
  98     /** Event to halt the simulator if the kernel calls die_if_kernel  */
  99     BreakPCEvent *kernelDieEvent;
 100 #endif
 101
 102     /**
 103      * Event to skip determine_cpu_caches() because we don't support
 104      * the IPRs that the code can access to figure out cache sizes
 105      */
 106     SkipFuncEvent *skipCacheProbeEvent;
 107
 108     /** PC based event to skip the ide_delay_50ms() call */
 109     SkipFuncEvent *skipIdeDelay50msEvent;
 110
 111     /**
 112      * PC based event to skip the dprink() call and emulate its
 113      * functionality
 114      */
 115     DebugPrintkEvent *debugPrintkEvent;
 116
 117     /**
 118      * Skip calculate_delay_loop() rather than waiting for this to be
 119      * calculated
 120      */
 121     SkipDelayLoopEvent *skipDelayLoopEvent;
 122
 123     /**
 124      * Event to print information about thread switches if the trace flag
 125      * Thread is set
 126      */
 127     PrintThreadInfo *printThreadEvent;
 128
 129     /**
 130      * Event to bin Interrupts seperately from kernel code
 131      */
 132     InterruptStartEvent *intStartEvent;
 133
 134     /**
 135      * Event to bin Interrupts seperately from kernel code
 136      */
 137     InterruptEndEvent *intEndEvent;
 138     InterruptEndEvent *intEndEvent2;
 139     InterruptEndEvent *intEndEvent3;
 140
 141     /** Grab the PCBB of the idle process when it starts */
 142     IdleStartEvent *idleStartEvent;
 143
 144   public:
 145     LinuxSystem(Params *p);
 146     ~LinuxSystem();
 147
 148     void setDelayLoop(ExecContext *xc);
 149 };
 150
 151 #endif // __KERN_LINUX_LINUX_SYSTEM_HH__