2ac04c11ac
This patch adds explicit overrides as this is now required when using "-Wall" with clang >= 3.5, the latter now part of the most recent XCode. The patch consequently removes "virtual" for those methods where "override" is added. The latter should be enough of an indication. As part of this patch, a few minor issues that clang >= 3.5 complains about are also resolved (unused methods and variables).
126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
/*
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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*/
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/** @file
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* System Console Backdoor Interface
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*/
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#ifndef __DEV_ALPHA_BACKDOOR_HH__
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#define __DEV_ALPHA_BACKDOOR_HH__
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#include "base/types.hh"
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#include "dev/alpha/access.h"
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#include "dev/io_device.hh"
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#include "params/AlphaBackdoor.hh"
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#include "sim/sim_object.hh"
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class BaseCPU;
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class Terminal;
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class AlphaSystem;
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class SimpleDisk;
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/**
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* Memory mapped interface to the system console. This device
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* represents a shared data region between the OS Kernel and the
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* System Console Backdoor.
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*
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* The system console is a small standalone program that is initially
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* run when the system boots. It contains the necessary code to
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* access the boot disk, to read/write from the console, and to pass
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* boot parameters to the kernel.
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*
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* This version of the system console is very different from the one
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* that would be found in a real system. Many of the functions use
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* some sort of backdoor to get their job done. For example, reading
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* from the boot device on a real system would require a minimal
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* device driver to access the disk controller, but since we have a
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* simulator here, we are able to bypass the disk controller and
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* access the disk image directly. There are also some things like
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* reading the kernel off the disk image into memory that are normally
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* taken care of by the console that are now taken care of by the
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* simulator.
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*
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* These shortcuts are acceptable since the system console is
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* primarily used doing boot before the kernel has loaded its device
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* drivers.
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*/
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class AlphaBackdoor : public BasicPioDevice
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{
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protected:
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struct Access : public AlphaAccess, public Serializable
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{
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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union {
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Access *alphaAccess;
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uint8_t *consoleData;
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};
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/** the disk must be accessed from the console */
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SimpleDisk *disk;
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/** the system console (the terminal) is accessable from the console */
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Terminal *terminal;
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/** a pointer to the system we are running in */
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AlphaSystem *system;
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/** a pointer to the CPU boot cpu */
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BaseCPU *cpu;
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public:
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typedef AlphaBackdoorParams Params;
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AlphaBackdoor(const Params *p);
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const Params *
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params() const
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{
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return dynamic_cast<const Params *>(_params);
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}
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void startup() override;
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/**
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* memory mapped reads and writes
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*/
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Tick read(PacketPtr pkt) override;
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Tick write(PacketPtr pkt) override;
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/**
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* standard serialization routines for checkpointing
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*/
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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#endif // __DEV_ALPHA_BACKDOOR_HH__
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