07cf9d914b
This patch simplifies the address-range determination mechanism and also unifies the naming across ports and devices. It further splits the queries for determining if a port is snooping and what address ranges it responds to (aiming towards a separation of cache-maintenance ports and pure memory-mapped ports). Default behaviours are such that most ports do not have to define isSnooping, and master ports need not implement getAddrRanges.
106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
/*
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* Copyright (c) 2004-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Andrew Schultz
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* Ali Saidi
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*/
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/* @file
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* PCI Configspace implementation
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*/
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#include "base/trace.hh"
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#include "debug/PciConfigAll.hh"
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#include "dev/pciconfigall.hh"
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#include "dev/pcireg.h"
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#include "dev/platform.hh"
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#include "mem/packet.hh"
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#include "mem/packet_access.hh"
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#include "params/PciConfigAll.hh"
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#include "sim/system.hh"
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using namespace std;
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PciConfigAll::PciConfigAll(const Params *p)
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: PioDevice(p)
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{
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pioAddr = p->platform->calcPciConfigAddr(params()->bus,0,0);
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}
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Tick
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PciConfigAll::read(PacketPtr pkt)
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{
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pkt->allocate();
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DPRINTF(PciConfigAll, "read va=%#x size=%d\n", pkt->getAddr(),
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pkt->getSize());
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switch (pkt->getSize()) {
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case sizeof(uint32_t):
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pkt->set<uint32_t>(0xFFFFFFFF);
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break;
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case sizeof(uint16_t):
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pkt->set<uint16_t>(0xFFFF);
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break;
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case sizeof(uint8_t):
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pkt->set<uint8_t>(0xFF);
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break;
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default:
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panic("invalid access size(?) for PCI configspace!\n");
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}
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pkt->makeAtomicResponse();
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return params()->pio_latency;
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}
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Tick
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PciConfigAll::write(PacketPtr pkt)
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{
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panic("Attempting to write to config space on non-existant device\n");
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M5_DUMMY_RETURN
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}
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AddrRangeList
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PciConfigAll::getAddrRanges()
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{
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AddrRangeList ranges;
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ranges.push_back(RangeSize(pioAddr, params()->size));
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return ranges;
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}
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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PciConfigAll *
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PciConfigAllParams::create()
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{
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return new PciConfigAll(this);
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}
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#endif // DOXYGEN_SHOULD_SKIP_THIS
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