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Diffstat (limited to 'src/dev/mips/backdoor.cc')
| -rwxr-xr-x | src/dev/mips/backdoor.cc | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/src/dev/mips/backdoor.cc b/src/dev/mips/backdoor.cc new file mode 100755 index 000000000..313f12567 --- /dev/null +++ b/src/dev/mips/backdoor.cc @@ -0,0 +1,297 @@ +/* + * 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 + * Mips Console Backdoor Definition + */ +#include <cstddef> +#include <string> + +#include "arch/mips/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/mips/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/MipsBackdoor.hh" +#include "sim/sim_object.hh" + + +using namespace std; +using namespace MipsISA; + +MipsBackdoor::MipsBackdoor(const Params *p) + : BasicPioDevice(p), disk(p->disk), terminal(p->terminal), + system(p->system), cpu(p->cpu) +{ + + pioSize = sizeof(struct MipsAccess); + + mipsAccess = new Access(); + mipsAccess->last_offset = pioSize - 1; + + mipsAccess->version = MIPS_ACCESS_VERSION; + mipsAccess->diskUnit = 1; + + mipsAccess->diskCount = 0; + mipsAccess->diskPAddr = 0; + mipsAccess->diskBlock = 0; + mipsAccess->diskOperation = 0; + mipsAccess->outputChar = 0; + mipsAccess->inputChar = 0; + bzero(mipsAccess->cpuStack, sizeof(mipsAccess->cpuStack)); + +} + +void +MipsBackdoor::startup() +{ + system->setMipsAccess(pioAddr); + mipsAccess->numCPUs = system->getNumCPUs(); + mipsAccess->kernStart = MipsISA::Phys2K0Seg(system->getKernelStart()); + mipsAccess->kernEnd = MipsISA::Phys2K0Seg(system->getKernelEnd()); + mipsAccess->entryPoint = MipsISA::Phys2K0Seg(system->getKernelEntry()); + mipsAccess->mem_size = system->physmem->size(); + mipsAccess->cpuClock = cpu->frequency() / 1000000; // In MHz + mipsAccess->intrClockFrequency = params()->platform->intrFrequency(); +} + +Tick +MipsBackdoor::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(); + + switch (pkt->getSize()) + { + case sizeof(uint32_t): + switch (daddr) + { + case offsetof(MipsAccess, last_offset): + pkt->set(mipsAccess->last_offset); + break; + case offsetof(MipsAccess, version): + pkt->set(mipsAccess->version); + break; + case offsetof(MipsAccess, numCPUs): + pkt->set(mipsAccess->numCPUs); + break; + case offsetof(MipsAccess, intrClockFrequency): + pkt->set(mipsAccess->intrClockFrequency); + break; + case offsetof(MipsAccess, inputChar): + pkt->set(terminal->console_in()); + break; + case offsetof(MipsAccess, cpuClock): + pkt->set(mipsAccess->cpuClock); + break; + case offsetof(MipsAccess, mem_size): + pkt->set(mipsAccess->mem_size); + break; + case offsetof(MipsAccess, kernStart): + pkt->set(mipsAccess->kernStart); + break; + case offsetof(MipsAccess, kernEnd): + pkt->set(mipsAccess->kernEnd); + break; + case offsetof(MipsAccess, entryPoint): + pkt->set(mipsAccess->entryPoint); + break; + case offsetof(MipsAccess, diskUnit): + pkt->set(mipsAccess->diskUnit); + break; + case offsetof(MipsAccess, diskCount): + pkt->set(mipsAccess->diskCount); + break; + case offsetof(MipsAccess, diskPAddr): + pkt->set(mipsAccess->diskPAddr); + break; + case offsetof(MipsAccess, diskBlock): + pkt->set(mipsAccess->diskBlock); + break; + case offsetof(MipsAccess, diskOperation): + pkt->set(mipsAccess->diskOperation); + break; + case offsetof(MipsAccess, outputChar): + pkt->set(mipsAccess->outputChar); + break; + default: + int cpunum = (daddr - offsetof(MipsAccess, cpuStack)) / + sizeof(mipsAccess->cpuStack[0]); + + if (cpunum >= 0 && cpunum < 64) + pkt->set(mipsAccess->cpuStack[cpunum]); + else + panic("Unknown 32bit access, %#x\n", daddr); + } + //DPRINTF(MipsBackdoor, "read: offset=%#x val=%#x\n", daddr, + // pkt->get<uint64_t>()); + break; + default: + pkt->setBadAddress(); + } + + pkt->makeAtomicResponse(); + return pioDelay; +} + +Tick +MipsBackdoor::write(PacketPtr pkt) +{ + assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); + Addr daddr = pkt->getAddr() - pioAddr; + + uint32_t val = pkt->get<uint32_t>(); + assert(pkt->getSize() == sizeof(uint32_t)); + switch (daddr) { + case offsetof(MipsAccess, diskUnit): + mipsAccess->diskUnit = val; + break; + + case offsetof(MipsAccess, diskCount): + mipsAccess->diskCount = val; + break; + + case offsetof(MipsAccess, diskPAddr): + mipsAccess->diskPAddr = val; + break; + + case offsetof(MipsAccess, diskBlock): + mipsAccess->diskBlock = val; + break; + + case offsetof(MipsAccess, diskOperation): + if (val == 0x13) + disk->read(mipsAccess->diskPAddr, mipsAccess->diskBlock, + mipsAccess->diskCount); + else + panic("Invalid disk operation!"); + + break; + + case offsetof(MipsAccess, outputChar): + terminal->out((char)(val & 0xff)); + break; + + default: + int cpunum = (daddr - offsetof(MipsAccess, cpuStack)) / + sizeof(mipsAccess->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) + mipsAccess->cpuStack[cpunum] = val; + else + panic("Unknown 32bit access, %#x\n", daddr); + } + + pkt->makeAtomicResponse(); + + return pioDelay; +} + +void +MipsBackdoor::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 +MipsBackdoor::Access::unserialize(Checkpoint *cp, const std::string §ion) +{ + 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 +MipsBackdoor::serialize(ostream &os) +{ + mipsAccess->serialize(os); +} + +void +MipsBackdoor::unserialize(Checkpoint *cp, const std::string §ion) +{ + mipsAccess->unserialize(cp, section); +} + +MipsBackdoor * +MipsBackdoorParams::create() +{ + return new MipsBackdoor(this); +} |