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/*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
*/
/** @file
* Isa Fake Device implementation
*/
#include "base/trace.hh"
#include "dev/isa_fake.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "sim/builder.hh"
#include "sim/system.hh"
using namespace std;
IsaFake::IsaFake(Params *p)
: BasicPioDevice(p)
{
if (!params()->retBadAddr)
pioSize = p->pio_size;
memset(&retData, p->retData, sizeof(retData));
}
Tick
IsaFake::read(PacketPtr pkt)
{
assert(pkt->result == Packet::Unknown);
if (params()->retBadAddr) {
DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n",
pkt->getAddr(), pkt->getSize());
pkt->result = Packet::BadAddress;
} else {
assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
DPRINTF(Tsunami, "read va=%#x size=%d\n",
pkt->getAddr(), pkt->getSize());
switch (pkt->getSize()) {
case sizeof(uint64_t):
pkt->set(retData);
break;
case sizeof(uint32_t):
pkt->set((uint32_t)retData);
break;
case sizeof(uint16_t):
pkt->set((uint16_t)retData);
break;
case sizeof(uint8_t):
pkt->set((uint8_t)retData);
break;
default:
panic("invalid access size!\n");
}
pkt->result = Packet::Success;
}
return pioDelay;
}
Tick
IsaFake::write(PacketPtr pkt)
{
if (params()->retBadAddr) {
DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n",
pkt->getAddr(), pkt->getSize());
pkt->result = Packet::BadAddress;
} else {
DPRINTF(Tsunami, "write - va=%#x size=%d \n",
pkt->getAddr(), pkt->getSize());
pkt->result = Packet::Success;
}
return pioDelay;
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(IsaFake)
Param<Addr> pio_addr;
Param<Tick> pio_latency;
Param<Addr> pio_size;
Param<bool> ret_bad_addr;
Param<uint8_t> ret_data;
SimObjectParam<Platform *> platform;
SimObjectParam<System *> system;
END_DECLARE_SIM_OBJECT_PARAMS(IsaFake)
BEGIN_INIT_SIM_OBJECT_PARAMS(IsaFake)
INIT_PARAM(pio_addr, "Device Address"),
INIT_PARAM(pio_latency, "Programmed IO latency"),
INIT_PARAM(pio_size, "Size of address range"),
INIT_PARAM(ret_bad_addr, "Return pkt status BadAddr"),
INIT_PARAM(ret_data, "Data to return if not bad addr"),
INIT_PARAM(platform, "platform"),
INIT_PARAM(system, "system object")
END_INIT_SIM_OBJECT_PARAMS(IsaFake)
CREATE_SIM_OBJECT(IsaFake)
{
IsaFake::Params *p = new IsaFake::Params;
p->name = getInstanceName();
p->pio_addr = pio_addr;
p->pio_delay = pio_latency;
p->pio_size = pio_size;
p->retBadAddr = ret_bad_addr;
p->retData = ret_data;
p->platform = platform;
p->system = system;
return new IsaFake(p);
}
REGISTER_SIM_OBJECT("IsaFake", IsaFake)
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