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/*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file
* This devices just panics when touched. For example if you have a
* kernel that touches the frame buffer which isn't allowed.
*/
#ifndef __DEV_BADDEV_HH__
#define __DEV_BADDEV_HH__
#include "base/range.hh"
#include "dev/io_device.hh"
class MemoryController;
/**
* BadDevice
* This device just panics when accessed. It is supposed to warn
* the user that the kernel they are running has unsupported
* options (i.e. frame buffer)
*/
class BadDevice : public PioDevice
{
private:
Addr addr;
static const Addr size = 0xf;
std::string devname;
public:
/**
* Constructor for the Baddev Class.
* @param name name of the object
* @param a base address of the write
* @param mmu the memory controller
* @param hier object to store parameters universal the device hierarchy
* @param bus The bus that this device is attached to
* @param devicename device that is not implemented
*/
BadDevice(const std::string &name, Addr a, MemoryController *mmu,
HierParams *hier, Bus *bus, const std::string &devicename);
/**
* On a read event we just panic aand hopefully print a
* meaningful error message.
* @param req Contains the address to read from.
* @param data A pointer to write the read data to.
* @return The fault condition of the access.
*/
virtual Fault read(MemReqPtr &req, uint8_t *data);
/**
* On a write event we just panic aand hopefully print a
* meaningful error message.
* @param req Contains the address to write to.
* @param data The data to write.
* @return The fault condition of the access.
*/
virtual Fault write(MemReqPtr &req, const uint8_t *data);
/**
* Return how long this access will take.
* @param req the memory request to calcuate
* @return Tick when the request is done
*/
Tick cacheAccess(MemReqPtr &req);
};
#endif // __DEV_BADDEV_HH__
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