amba_fake.cc revision 9806:3f262c18ad5d
1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 */ 42 43#include "base/trace.hh" 44#include "debug/AMBA.hh" 45#include "dev/arm/amba_fake.hh" 46#include "mem/packet.hh" 47#include "mem/packet_access.hh" 48 49AmbaFake::AmbaFake(const Params *p) 50 : AmbaPioDevice(p) 51{ 52 pioSize = 0xfff; 53} 54 55Tick 56AmbaFake::read(PacketPtr pkt) 57{ 58 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 59 60 Addr daddr = pkt->getAddr() - pioAddr; 61 pkt->allocate(); 62 63 DPRINTF(AMBA, " read register %#x\n", daddr); 64 65 pkt->set<uint32_t>(0); 66 if (!readId(pkt, ambaId, pioAddr) && !params()->ignore_access) 67 panic("Tried to read AmbaFake at offset %#x that doesn't exist\n", daddr); 68 69 pkt->makeAtomicResponse(); 70 return pioDelay; 71} 72 73Tick 74AmbaFake::write(PacketPtr pkt) 75{ 76 77 Addr daddr = pkt->getAddr() - pioAddr; 78 pkt->allocate(); 79 80 if (!params()->ignore_access) 81 panic("Tried to write AmbaFake at offset %#x that doesn't exist\n", daddr); 82 83 pkt->makeAtomicResponse(); 84 return pioDelay; 85} 86 87 88AmbaFake * 89AmbaFakeParams::create() 90{ 91 return new AmbaFake(this); 92} 93