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