95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
/*
|
|
* 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__
|