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+/*
+ * Copyright (c) 2001-2005 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: Nathan Binkert
+ * Ali Saidi
+ * Steve Reinhardt
+ * Erik Hallnor
+ */
+
+/** @file
+ * Alpha Console Backdoor Definition
+ */
+
+#include <cstddef>
+#include <string>
+
+#include "arch/alpha/system.hh"
+#include "base/inifile.hh"
+#include "base/str.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/thread_context.hh"
+#include "dev/alpha/backdoor.hh"
+#include "dev/platform.hh"
+#include "dev/simple_disk.hh"
+#include "dev/terminal.hh"
+#include "mem/packet.hh"
+#include "mem/packet_access.hh"
+#include "mem/physical.hh"
+#include "params/AlphaBackdoor.hh"
+#include "sim/sim_object.hh"
+
+using namespace std;
+using namespace AlphaISA;
+
+AlphaBackdoor::AlphaBackdoor(const Params *p)
+ : BasicPioDevice(p), disk(p->disk), terminal(p->terminal),
+ system(p->system), cpu(p->cpu)
+{
+
+ pioSize = sizeof(struct AlphaAccess);
+
+ alphaAccess = new Access();
+ alphaAccess->last_offset = pioSize - 1;
+
+ alphaAccess->version = ALPHA_ACCESS_VERSION;
+ alphaAccess->diskUnit = 1;
+
+ alphaAccess->diskCount = 0;
+ alphaAccess->diskPAddr = 0;
+ alphaAccess->diskBlock = 0;
+ alphaAccess->diskOperation = 0;
+ alphaAccess->outputChar = 0;
+ alphaAccess->inputChar = 0;
+ std::memset(alphaAccess->cpuStack, 0, sizeof(alphaAccess->cpuStack));
+
+}
+
+void
+AlphaBackdoor::startup()
+{
+ system->setAlphaAccess(pioAddr);
+ alphaAccess->numCPUs = system->getNumCPUs();
+ alphaAccess->kernStart = system->getKernelStart();
+ alphaAccess->kernEnd = system->getKernelEnd();
+ alphaAccess->entryPoint = system->getKernelEntry();
+ alphaAccess->mem_size = system->physmem->size();
+ alphaAccess->cpuClock = cpu->frequency() / 1000000; // In MHz
+ alphaAccess->intrClockFrequency = params()->platform->intrFrequency();
+}
+
+Tick
+AlphaBackdoor::read(PacketPtr pkt)
+{
+
+ /** XXX Do we want to push the addr munging to a bus brige or something? So
+ * the device has it's physical address and then the bridge adds on whatever
+ * machine dependent address swizzle is required?
+ */
+
+ assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
+
+ Addr daddr = pkt->getAddr() - pioAddr;
+
+ pkt->allocate();
+ pkt->makeAtomicResponse();
+
+ switch (pkt->getSize())
+ {
+ case sizeof(uint32_t):
+ switch (daddr)
+ {
+ case offsetof(AlphaAccess, last_offset):
+ pkt->set(alphaAccess->last_offset);
+ break;
+ case offsetof(AlphaAccess, version):
+ pkt->set(alphaAccess->version);
+ break;
+ case offsetof(AlphaAccess, numCPUs):
+ pkt->set(alphaAccess->numCPUs);
+ break;
+ case offsetof(AlphaAccess, intrClockFrequency):
+ pkt->set(alphaAccess->intrClockFrequency);
+ break;
+ default:
+ /* Old console code read in everyting as a 32bit int
+ * we now break that for better error checking.
+ */
+ pkt->setBadAddress();
+ }
+ DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr,
+ pkt->get<uint32_t>());
+ break;
+ case sizeof(uint64_t):
+ switch (daddr)
+ {
+ case offsetof(AlphaAccess, inputChar):
+ pkt->set(terminal->console_in());
+ break;
+ case offsetof(AlphaAccess, cpuClock):
+ pkt->set(alphaAccess->cpuClock);
+ break;
+ case offsetof(AlphaAccess, mem_size):
+ pkt->set(alphaAccess->mem_size);
+ break;
+ case offsetof(AlphaAccess, kernStart):
+ pkt->set(alphaAccess->kernStart);
+ break;
+ case offsetof(AlphaAccess, kernEnd):
+ pkt->set(alphaAccess->kernEnd);
+ break;
+ case offsetof(AlphaAccess, entryPoint):
+ pkt->set(alphaAccess->entryPoint);
+ break;
+ case offsetof(AlphaAccess, diskUnit):
+ pkt->set(alphaAccess->diskUnit);
+ break;
+ case offsetof(AlphaAccess, diskCount):
+ pkt->set(alphaAccess->diskCount);
+ break;
+ case offsetof(AlphaAccess, diskPAddr):
+ pkt->set(alphaAccess->diskPAddr);
+ break;
+ case offsetof(AlphaAccess, diskBlock):
+ pkt->set(alphaAccess->diskBlock);
+ break;
+ case offsetof(AlphaAccess, diskOperation):
+ pkt->set(alphaAccess->diskOperation);
+ break;
+ case offsetof(AlphaAccess, outputChar):
+ pkt->set(alphaAccess->outputChar);
+ break;
+ default:
+ int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) /
+ sizeof(alphaAccess->cpuStack[0]);
+
+ if (cpunum >= 0 && cpunum < 64)
+ pkt->set(alphaAccess->cpuStack[cpunum]);
+ else
+ panic("Unknown 64bit access, %#x\n", daddr);
+ }
+ DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr,
+ pkt->get<uint64_t>());
+ break;
+ default:
+ pkt->setBadAddress();
+ }
+ return pioDelay;
+}
+
+Tick
+AlphaBackdoor::write(PacketPtr pkt)
+{
+ assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
+ Addr daddr = pkt->getAddr() - pioAddr;
+
+ uint64_t val = pkt->get<uint64_t>();
+ assert(pkt->getSize() == sizeof(uint64_t));
+
+ switch (daddr) {
+ case offsetof(AlphaAccess, diskUnit):
+ alphaAccess->diskUnit = val;
+ break;
+
+ case offsetof(AlphaAccess, diskCount):
+ alphaAccess->diskCount = val;
+ break;
+
+ case offsetof(AlphaAccess, diskPAddr):
+ alphaAccess->diskPAddr = val;
+ break;
+
+ case offsetof(AlphaAccess, diskBlock):
+ alphaAccess->diskBlock = val;
+ break;
+
+ case offsetof(AlphaAccess, diskOperation):
+ if (val == 0x13)
+ disk->read(alphaAccess->diskPAddr, alphaAccess->diskBlock,
+ alphaAccess->diskCount);
+ else
+ panic("Invalid disk operation!");
+
+ break;
+
+ case offsetof(AlphaAccess, outputChar):
+ terminal->out((char)(val & 0xff));
+ break;
+
+ default:
+ int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) /
+ sizeof(alphaAccess->cpuStack[0]);
+ warn("%d: Trying to launch CPU number %d!", curTick, cpunum);
+ assert(val > 0 && "Must not access primary cpu");
+ if (cpunum >= 0 && cpunum < 64)
+ alphaAccess->cpuStack[cpunum] = val;
+ else
+ panic("Unknown 64bit access, %#x\n", daddr);
+ }
+
+ pkt->makeAtomicResponse();
+
+ return pioDelay;
+}
+
+void
+AlphaBackdoor::Access::serialize(ostream &os)
+{
+ SERIALIZE_SCALAR(last_offset);
+ SERIALIZE_SCALAR(version);
+ SERIALIZE_SCALAR(numCPUs);
+ SERIALIZE_SCALAR(mem_size);
+ SERIALIZE_SCALAR(cpuClock);
+ SERIALIZE_SCALAR(intrClockFrequency);
+ SERIALIZE_SCALAR(kernStart);
+ SERIALIZE_SCALAR(kernEnd);
+ SERIALIZE_SCALAR(entryPoint);
+ SERIALIZE_SCALAR(diskUnit);
+ SERIALIZE_SCALAR(diskCount);
+ SERIALIZE_SCALAR(diskPAddr);
+ SERIALIZE_SCALAR(diskBlock);
+ SERIALIZE_SCALAR(diskOperation);
+ SERIALIZE_SCALAR(outputChar);
+ SERIALIZE_SCALAR(inputChar);
+ SERIALIZE_ARRAY(cpuStack,64);
+}
+
+void
+AlphaBackdoor::Access::unserialize(Checkpoint *cp, const std::string &section)
+{
+ UNSERIALIZE_SCALAR(last_offset);
+ UNSERIALIZE_SCALAR(version);
+ UNSERIALIZE_SCALAR(numCPUs);
+ UNSERIALIZE_SCALAR(mem_size);
+ UNSERIALIZE_SCALAR(cpuClock);
+ UNSERIALIZE_SCALAR(intrClockFrequency);
+ UNSERIALIZE_SCALAR(kernStart);
+ UNSERIALIZE_SCALAR(kernEnd);
+ UNSERIALIZE_SCALAR(entryPoint);
+ UNSERIALIZE_SCALAR(diskUnit);
+ UNSERIALIZE_SCALAR(diskCount);
+ UNSERIALIZE_SCALAR(diskPAddr);
+ UNSERIALIZE_SCALAR(diskBlock);
+ UNSERIALIZE_SCALAR(diskOperation);
+ UNSERIALIZE_SCALAR(outputChar);
+ UNSERIALIZE_SCALAR(inputChar);
+ UNSERIALIZE_ARRAY(cpuStack, 64);
+}
+
+void
+AlphaBackdoor::serialize(ostream &os)
+{
+ alphaAccess->serialize(os);
+}
+
+void
+AlphaBackdoor::unserialize(Checkpoint *cp, const std::string &section)
+{
+ alphaAccess->unserialize(cp, section);
+}
+
+AlphaBackdoor *
+AlphaBackdoorParams::create()
+{
+ return new AlphaBackdoor(this);
+}