isa_fake.hh revision 4762
16019Shines@cs.fsu.edu/* 211496Sandreas.sandberg@arm.com * Copyright (c) 2004-2005 The Regents of The University of Michigan 37093Sgblack@eecs.umich.edu * All rights reserved. 47093Sgblack@eecs.umich.edu * 57093Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 67093Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 77093Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 87093Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 97093Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 107093Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 117093Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 127093Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 137093Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 146019Shines@cs.fsu.edu * this software without specific prior written permission. 156019Shines@cs.fsu.edu * 166019Shines@cs.fsu.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176019Shines@cs.fsu.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186019Shines@cs.fsu.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196019Shines@cs.fsu.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206019Shines@cs.fsu.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216019Shines@cs.fsu.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226019Shines@cs.fsu.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236019Shines@cs.fsu.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246019Shines@cs.fsu.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256019Shines@cs.fsu.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266019Shines@cs.fsu.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276019Shines@cs.fsu.edu * 286019Shines@cs.fsu.edu * Authors: Ali Saidi 296019Shines@cs.fsu.edu */ 306019Shines@cs.fsu.edu 316019Shines@cs.fsu.edu/** @file 326019Shines@cs.fsu.edu * Declaration of a fake device. 336019Shines@cs.fsu.edu */ 346019Shines@cs.fsu.edu 356019Shines@cs.fsu.edu#ifndef __ISA_FAKE_HH__ 366019Shines@cs.fsu.edu#define __ISA_FAKE_HH__ 376019Shines@cs.fsu.edu 386019Shines@cs.fsu.edu#include <string> 396019Shines@cs.fsu.edu 406019Shines@cs.fsu.edu#include "base/range.hh" 416735Sgblack@eecs.umich.edu#include "dev/io_device.hh" 426735Sgblack@eecs.umich.edu#include "dev/alpha/tsunami.hh" 4310037SARM gem5 Developers#include "params/IsaFake.hh" 4410037SARM gem5 Developers#include "mem/packet.hh" 456019Shines@cs.fsu.edu 466019Shines@cs.fsu.edu/** 476019Shines@cs.fsu.edu * IsaFake is a device that returns, BadAddr, 1 or 0 on all reads and 4810037SARM gem5 Developers * rites. It is meant to be placed at an address range 4910037SARM gem5 Developers * so that an mcheck doesn't occur when an os probes a piece of hw 5010037SARM gem5 Developers * that doesn't exist (e.g. UARTs1-3), or catch requests in the memory system 5110037SARM gem5 Developers * that have no responders.. 528229Snate@binkert.org */ 538229Snate@binkert.orgclass IsaFake : public BasicPioDevice 546019Shines@cs.fsu.edu{ 558232Snate@binkert.org protected: 568782Sgblack@eecs.umich.edu uint8_t retData8; 576019Shines@cs.fsu.edu uint16_t retData16; 586019Shines@cs.fsu.edu uint32_t retData32; 596019Shines@cs.fsu.edu uint64_t retData64; 606019Shines@cs.fsu.edu 6110037SARM gem5 Developers public: 6210037SARM gem5 Developers typedef IsaFakeParams Params; 6310037SARM gem5 Developers const Params * 6410037SARM gem5 Developers params() const 6510037SARM gem5 Developers { 6610037SARM gem5 Developers return dynamic_cast<const Params *>(_params); 6710037SARM gem5 Developers } 6810037SARM gem5 Developers /** 6910037SARM gem5 Developers * The constructor for Tsunmami Fake just registers itself with the MMU. 7010037SARM gem5 Developers * @param p params structure 7110037SARM gem5 Developers */ 7210037SARM gem5 Developers IsaFake(Params *p); 7310037SARM gem5 Developers 7410037SARM gem5 Developers /** 7510037SARM gem5 Developers * This read always returns -1. 7610037SARM gem5 Developers * @param pkt The memory request. 7710037SARM gem5 Developers * @param data Where to put the data. 7810037SARM gem5 Developers */ 7910037SARM gem5 Developers virtual Tick read(PacketPtr pkt); 8010037SARM gem5 Developers 8110037SARM gem5 Developers /** 8210037SARM gem5 Developers * All writes are simply ignored. 8310037SARM gem5 Developers * @param pkt The memory request. 8410037SARM gem5 Developers * @param data the data to not write. 8510037SARM gem5 Developers */ 8610037SARM gem5 Developers virtual Tick write(PacketPtr pkt); 8710037SARM gem5 Developers}; 8810037SARM gem5 Developers 8910037SARM gem5 Developers#endif // __ISA_FAKE_HH__ 9010037SARM gem5 Developers