baddev.hh revision 802
1/* 2 * Copyright (c) 2003 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/* @file 30 * This devices just panics when touched. For example if you have a 31 * kernel that touches the frame buffer which isn't allowed. 32 */ 33 34#ifndef __BADDEV_HH__ 35#define __BADDEV_HH__ 36 37#include "mem/functional_mem/mmap_device.hh" 38 39/** 40 * BadDevice 41 * This device just panics when accessed. It is supposed to warn 42 * the user that the kernel they are running has unsupported 43 * options (i.e. frame buffer) 44 */ 45class BadDevice : public MmapDevice 46{ 47 private: 48 49 std::string devname; 50 protected: 51 52 public: 53 /** 54 * The default constructor. 55 */ 56 BadDevice(const std::string &name, Addr addr, Addr mask, 57 MemoryController *mmu, const std::string &devicename); 58 59 virtual Fault read(MemReqPtr &req, uint8_t *data); 60 virtual Fault write(MemReqPtr &req, const uint8_t *data); 61 62 63}; 64 65#endif // __BADDEV_HH__ 66