baddev.hh revision 909
12315SN/A/* 28733Sgeoffrey.blake@arm.com * Copyright (c) 2004 The Regents of The University of Michigan 39920Syasuko.eckert@amd.com * All rights reserved. 48733Sgeoffrey.blake@arm.com * 58733Sgeoffrey.blake@arm.com * Redistribution and use in source and binary forms, with or without 68733Sgeoffrey.blake@arm.com * modification, are permitted provided that the following conditions are 78733Sgeoffrey.blake@arm.com * met: redistributions of source code must retain the above copyright 88733Sgeoffrey.blake@arm.com * notice, this list of conditions and the following disclaimer; 98733Sgeoffrey.blake@arm.com * redistributions in binary form must reproduce the above copyright 108733Sgeoffrey.blake@arm.com * notice, this list of conditions and the following disclaimer in the 118733Sgeoffrey.blake@arm.com * documentation and/or other materials provided with the distribution; 128733Sgeoffrey.blake@arm.com * neither the name of the copyright holders nor the names of its 138733Sgeoffrey.blake@arm.com * contributors may be used to endorse or promote products derived from 148733Sgeoffrey.blake@arm.com * this software without specific prior written permission. 152332SN/A * 162315SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172315SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182315SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192315SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202315SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212315SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222315SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232315SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242315SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252315SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262315SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272315SN/A */ 282315SN/A 292315SN/A/* @file 302315SN/A * This devices just panics when touched. For example if you have a 312315SN/A * kernel that touches the frame buffer which isn't allowed. 322315SN/A */ 332315SN/A 342315SN/A#ifndef __BADDEV_HH__ 352315SN/A#define __BADDEV_HH__ 362315SN/A 372315SN/A#include "base/range.hh" 382315SN/A#include "dev/io_device.hh" 392315SN/A 402689Sktlim@umich.edu/** 412689Sktlim@umich.edu * BadDevice 422315SN/A * This device just panics when accessed. It is supposed to warn 432315SN/A * the user that the kernel they are running has unsupported 442315SN/A * options (i.e. frame buffer) 452315SN/A */ 462315SN/Aclass BadDevice : public PioDevice 472315SN/A{ 488229Snate@binkert.org private: 492315SN/A Addr addr; 502315SN/A static const Addr size = 0xf; 512669Sktlim@umich.edu 522315SN/A std::string devname; 532315SN/A 542315SN/A public: 5510319SAndreas.Sandberg@ARM.com /** 568229Snate@binkert.org * Constructor for the Baddev Class. 572683Sktlim@umich.edu * @param name name of the object 582315SN/A * @param a base address of the write 598733Sgeoffrey.blake@arm.com * @param mmu the memory controller 608733Sgeoffrey.blake@arm.com * @param hier object to store parameters universal the device hierarchy 612315SN/A * @param bus The bus that this device is attached to 622315SN/A * @param devicename device that is not implemented 632315SN/A */ 643468Sgblack@eecs.umich.edu BadDevice(const std::string &name, Addr a, MemoryController *mmu, 653468Sgblack@eecs.umich.edu HierParams *hier, Bus *bus, const std::string &devicename); 666022Sgblack@eecs.umich.edu 673468Sgblack@eecs.umich.edu /** 682315SN/A * On a read event we just panic aand hopefully print a 692315SN/A * meaningful error message. 702315SN/A * @param req Contains the address to read from. 712680Sktlim@umich.edu * @param data A pointer to write the read data to. 722669Sktlim@umich.edu * @return The fault condition of the access. 732315SN/A */ 742350SN/A virtual Fault read(MemReqPtr &req, uint8_t *data); 752350SN/A 762350SN/A /** 772350SN/A * On a write event we just panic aand hopefully print a 782350SN/A * meaningful error message. 792350SN/A * @param req Contains the address to write to. 802350SN/A * @param data The data to write. 812350SN/A * @return The fault condition of the access. 822350SN/A */ 832350SN/A virtual Fault write(MemReqPtr &req, const uint8_t *data); 842680Sktlim@umich.edu 852683Sktlim@umich.edu /** 862680Sktlim@umich.edu * Return how long this access will take. 872350SN/A * @param req the memory request to calcuate 882680Sktlim@umich.edu * @return Tick when the request is done 892350SN/A */ 9010319SAndreas.Sandberg@ARM.com Tick cacheAccess(MemReqPtr &req); 912315SN/A}; 922315SN/A 932315SN/A#endif // __BADDEV_HH__ 942669Sktlim@umich.edu