src/arch/arm/linux/system.hh

   1 /*
   2  * Copyright (c) 2010 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Copyright (c) 2002-2005 The Regents of The University of Michigan
  15  * All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions are
  19  * met: redistributions of source code must retain the above copyright
  20  * notice, this list of conditions and the following disclaimer;
  21  * redistributions in binary form must reproduce the above copyright
  22  * notice, this list of conditions and the following disclaimer in the
  23  * documentation and/or other materials provided with the distribution;
  24  * neither the name of the copyright holders nor the names of its
  25  * contributors may be used to endorse or promote products derived from
  26  * this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  * Authors: Ali Saidi
  41  */
  42
  43 #ifndef __ARCH_ARM_LINUX_SYSTEM_HH__
  44 #define __ARCH_ARM_LINUX_SYSTEM_HH__
  45
  46 #include <string>
  47 #include <vector>
  48
  49 #include "arch/arm/system.hh"
  50 #include "kern/linux/events.hh"
  51 #include "params/LinuxArmSystem.hh"
  52
  53 class LinuxArmSystem : public ArmSystem
  54 {
  55   public:
  56     /** Boilerplate params code */
  57     typedef LinuxArmSystemParams Params;
  58     const Params *
  59     params() const
  60     {
  61         return dynamic_cast<const Params *>(_params);
  62     }
  63
  64     LinuxArmSystem(Params *p);
  65     ~LinuxArmSystem();
  66
  67     void initState();
  68
  69     bool adderBootUncacheable(Addr a);
  70
  71   private:
  72 #ifndef NDEBUG
  73     /** Event to halt the simulator if the kernel calls panic()  */
  74     BreakPCEvent *kernelPanicEvent;
  75 #endif
  76     /**
  77      * PC based event to skip udelay(<time>) calls and quiesce the
  78      * processor for the appropriate amount of time. This is not functionally
  79      * required but does speed up simulation.
  80      */
  81     Linux::UDelayEvent *uDelaySkipEvent;
  82
  83     /** Another PC based skip event for const_udelay(). Similar to the udelay
  84      * skip, but this function precomputes the first multiply that is done
  85      * in the generic case since the parameter is known at compile time.
  86      * Thus we need to do some division to get back to us.
  87      */
  88     Linux::UDelayEvent *constUDelaySkipEvent;
  89
  90     /** These variables store addresses of important data structures
  91      * that are normaly kept coherent at boot with cache mainetence operations.
  92      * Since these operations aren't supported in gem5, we keep them coherent
  93      * by making them uncacheable until all processors in the system boot.
  94      */
  95     Addr secDataPtrAddr;
  96     Addr secDataAddr;
  97     Addr penReleaseAddr;
  98 };
  99
 100 #endif // __ARCH_ARM_LINUX_SYSTEM_HH__
 101