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Diffstat (limited to 'cpu/simple/cpu.cc')
| -rw-r--r-- | cpu/simple/cpu.cc | 1227 |
1 files changed, 0 insertions, 1227 deletions
diff --git a/cpu/simple/cpu.cc b/cpu/simple/cpu.cc deleted file mode 100644 index 33fe63c26..000000000 --- a/cpu/simple/cpu.cc +++ /dev/null @@ -1,1227 +0,0 @@ -/* - * Copyright (c) 2002-2005 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. - */ - -#include <cmath> -#include <cstdio> -#include <cstdlib> -#include <iostream> -#include <iomanip> -#include <list> -#include <sstream> -#include <string> - -#include "arch/utility.hh" -#include "base/cprintf.hh" -#include "base/inifile.hh" -#include "base/loader/symtab.hh" -#include "base/misc.hh" -#include "base/pollevent.hh" -#include "base/range.hh" -#include "base/stats/events.hh" -#include "base/trace.hh" -#include "cpu/base.hh" -#include "cpu/cpu_exec_context.hh" -#include "cpu/exec_context.hh" -#include "cpu/exetrace.hh" -#include "cpu/profile.hh" -#include "cpu/sampler/sampler.hh" -#include "cpu/simple/cpu.hh" -#include "cpu/smt.hh" -#include "cpu/static_inst.hh" -#include "kern/kernel_stats.hh" -#include "mem/packet_impl.hh" -#include "sim/byteswap.hh" -#include "sim/builder.hh" -#include "sim/debug.hh" -#include "sim/host.hh" -#include "sim/sim_events.hh" -#include "sim/sim_object.hh" -#include "sim/stats.hh" - -#if FULL_SYSTEM -#include "base/remote_gdb.hh" -//#include "mem/functional/memory_control.hh" -//#include "mem/functional/physical.hh" -#include "sim/system.hh" -#include "arch/tlb.hh" -#include "arch/stacktrace.hh" -#include "arch/vtophys.hh" -#else // !FULL_SYSTEM -#include "mem/mem_object.hh" -#endif // FULL_SYSTEM - -using namespace std; -using namespace TheISA; - -SimpleCPU::TickEvent::TickEvent(SimpleCPU *c, int w) - : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c), width(w) -{ -} - - -void -SimpleCPU::init() -{ - //Create Memory Ports (conect them up) - Port *mem_dport = mem->getPort(""); - dcachePort.setPeer(mem_dport); - mem_dport->setPeer(&dcachePort); - - Port *mem_iport = mem->getPort(""); - icachePort.setPeer(mem_iport); - mem_iport->setPeer(&icachePort); - - BaseCPU::init(); -#if FULL_SYSTEM - for (int i = 0; i < execContexts.size(); ++i) { - ExecContext *xc = execContexts[i]; - - // initialize CPU, including PC - TheISA::initCPU(xc, xc->readCpuId()); - } -#endif -} - -void -SimpleCPU::TickEvent::process() -{ - int count = width; - do { - cpu->tick(); - } while (--count > 0 && cpu->status() == Running); -} - -const char * -SimpleCPU::TickEvent::description() -{ - return "SimpleCPU tick event"; -} - - -bool -SimpleCPU::CpuPort::recvTiming(Packet &pkt) -{ - cpu->processResponse(pkt); - return true; -} - -Tick -SimpleCPU::CpuPort::recvAtomic(Packet &pkt) -{ - panic("CPU doesn't expect callback!"); - return curTick; -} - -void -SimpleCPU::CpuPort::recvFunctional(Packet &pkt) -{ - panic("CPU doesn't expect callback!"); -} - -void -SimpleCPU::CpuPort::recvStatusChange(Status status) -{ - cpu->recvStatusChange(status); -} - -Packet * -SimpleCPU::CpuPort::recvRetry() -{ - return cpu->processRetry(); -} - -SimpleCPU::SimpleCPU(Params *p) - : BaseCPU(p), mem(p->mem), icachePort(this), - dcachePort(this), tickEvent(this, p->width), cpuXC(NULL) -{ - _status = Idle; - -#if FULL_SYSTEM - cpuXC = new CPUExecContext(this, 0, p->system, p->itb, p->dtb); -#else - cpuXC = new CPUExecContext(this, /* thread_num */ 0, p->process, - /* asid */ 0, mem); -#endif // !FULL_SYSTEM - - xcProxy = cpuXC->getProxy(); - -#if SIMPLE_CPU_MEM_ATOMIC || SIMPLE_CPU_MEM_IMMEDIATE - ifetch_req = new Request(true); - ifetch_req->setAsid(0); - // @todo fix me and get the real cpu iD!!! - ifetch_req->setCpuNum(0); - ifetch_req->setSize(sizeof(MachInst)); - ifetch_pkt = new Packet; - ifetch_pkt->cmd = Read; - ifetch_pkt->dataStatic(&inst); - ifetch_pkt->req = ifetch_req; - ifetch_pkt->size = sizeof(MachInst); - - data_read_req = new Request(true); - // @todo fix me and get the real cpu iD!!! - data_read_req->setCpuNum(0); - data_read_req->setAsid(0); - data_read_pkt = new Packet; - data_read_pkt->cmd = Read; - data_read_pkt->dataStatic(&dataReg); - data_read_pkt->req = data_read_req; - - data_write_req = new Request(true); - // @todo fix me and get the real cpu iD!!! - data_write_req->setCpuNum(0); - data_write_req->setAsid(0); - data_write_pkt = new Packet; - data_write_pkt->cmd = Write; - data_write_pkt->req = data_write_req; -#endif - - numInst = 0; - startNumInst = 0; - numLoad = 0; - startNumLoad = 0; - lastIcacheStall = 0; - lastDcacheStall = 0; - - execContexts.push_back(xcProxy); -} - -SimpleCPU::~SimpleCPU() -{ -} - -void -SimpleCPU::switchOut(Sampler *s) -{ - sampler = s; - if (status() == DcacheWaitResponse) { - DPRINTF(Sampler,"Outstanding dcache access, waiting for completion\n"); - _status = DcacheWaitSwitch; - } - else { - _status = SwitchedOut; - - if (tickEvent.scheduled()) - tickEvent.squash(); - - sampler->signalSwitched(); - } -} - - -void -SimpleCPU::takeOverFrom(BaseCPU *oldCPU) -{ - BaseCPU::takeOverFrom(oldCPU); - - assert(!tickEvent.scheduled()); - - // if any of this CPU's ExecContexts are active, mark the CPU as - // running and schedule its tick event. - for (int i = 0; i < execContexts.size(); ++i) { - ExecContext *xc = execContexts[i]; - if (xc->status() == ExecContext::Active && _status != Running) { - _status = Running; - tickEvent.schedule(curTick); - } - } -} - - -void -SimpleCPU::activateContext(int thread_num, int delay) -{ - assert(thread_num == 0); - assert(cpuXC); - - assert(_status == Idle); - notIdleFraction++; - scheduleTickEvent(delay); - _status = Running; -} - - -void -SimpleCPU::suspendContext(int thread_num) -{ - assert(thread_num == 0); - assert(cpuXC); - - assert(_status == Running); - notIdleFraction--; - unscheduleTickEvent(); - _status = Idle; -} - - -void -SimpleCPU::deallocateContext(int thread_num) -{ - // for now, these are equivalent - suspendContext(thread_num); -} - - -void -SimpleCPU::haltContext(int thread_num) -{ - // for now, these are equivalent - suspendContext(thread_num); -} - - -void -SimpleCPU::regStats() -{ - using namespace Stats; - - BaseCPU::regStats(); - - numInsts - .name(name() + ".num_insts") - .desc("Number of instructions executed") - ; - - numMemRefs - .name(name() + ".num_refs") - .desc("Number of memory references") - ; - - notIdleFraction - .name(name() + ".not_idle_fraction") - .desc("Percentage of non-idle cycles") - ; - - idleFraction - .name(name() + ".idle_fraction") - .desc("Percentage of idle cycles") - ; - - icacheStallCycles - .name(name() + ".icache_stall_cycles") - .desc("ICache total stall cycles") - .prereq(icacheStallCycles) - ; - - dcacheStallCycles - .name(name() + ".dcache_stall_cycles") - .desc("DCache total stall cycles") - .prereq(dcacheStallCycles) - ; - - icacheRetryCycles - .name(name() + ".icache_retry_cycles") - .desc("ICache total retry cycles") - .prereq(icacheRetryCycles) - ; - - dcacheRetryCycles - .name(name() + ".dcache_retry_cycles") - .desc("DCache total retry cycles") - .prereq(dcacheRetryCycles) - ; - - idleFraction = constant(1.0) - notIdleFraction; -} - -void -SimpleCPU::resetStats() -{ - startNumInst = numInst; - notIdleFraction = (_status != Idle); -} - -void -SimpleCPU::serialize(ostream &os) -{ - BaseCPU::serialize(os); - SERIALIZE_ENUM(_status); - SERIALIZE_SCALAR(inst); - nameOut(os, csprintf("%s.xc", name())); - cpuXC->serialize(os); - nameOut(os, csprintf("%s.tickEvent", name())); - tickEvent.serialize(os); - nameOut(os, csprintf("%s.cacheCompletionEvent", name())); -} - -void -SimpleCPU::unserialize(Checkpoint *cp, const string §ion) -{ - BaseCPU::unserialize(cp, section); - UNSERIALIZE_ENUM(_status); - UNSERIALIZE_SCALAR(inst); - cpuXC->unserialize(cp, csprintf("%s.xc", section)); - tickEvent.unserialize(cp, csprintf("%s.tickEvent", section)); -} - -void -change_thread_state(int thread_number, int activate, int priority) -{ -} - -Fault -SimpleCPU::copySrcTranslate(Addr src) -{ -#if 0 - static bool no_warn = true; - int blk_size = (dcacheInterface) ? dcacheInterface->getBlockSize() : 64; - // Only support block sizes of 64 atm. - assert(blk_size == 64); - int offset = src & (blk_size - 1); - - // Make sure block doesn't span page - if (no_warn && - (src & PageMask) != ((src + blk_size) & PageMask) && - (src >> 40) != 0xfffffc) { - warn("Copied block source spans pages %x.", src); - no_warn = false; - } - - memReq->reset(src & ~(blk_size - 1), blk_size); - - // translate to physical address Fault fault = cpuXC->translateDataReadReq(req); - - if (fault == NoFault) { - cpuXC->copySrcAddr = src; - cpuXC->copySrcPhysAddr = memReq->paddr + offset; - } else { - assert(!fault->isAlignmentFault()); - - cpuXC->copySrcAddr = 0; - cpuXC->copySrcPhysAddr = 0; - } - return fault; -#else - return NoFault; -#endif -} - -Fault -SimpleCPU::copy(Addr dest) -{ -#if 0 - static bool no_warn = true; - int blk_size = (dcacheInterface) ? dcacheInterface->getBlockSize() : 64; - // Only support block sizes of 64 atm. - assert(blk_size == 64); - uint8_t data[blk_size]; - //assert(cpuXC->copySrcAddr); - int offset = dest & (blk_size - 1); - - // Make sure block doesn't span page - if (no_warn && - (dest & PageMask) != ((dest + blk_size) & PageMask) && - (dest >> 40) != 0xfffffc) { - no_warn = false; - warn("Copied block destination spans pages %x. ", dest); - } - - memReq->reset(dest & ~(blk_size -1), blk_size); - // translate to physical address - Fault fault = cpuXC->translateDataWriteReq(req); - - if (fault == NoFault) { - Addr dest_addr = memReq->paddr + offset; - // Need to read straight from memory since we have more than 8 bytes. - memReq->paddr = cpuXC->copySrcPhysAddr; - cpuXC->mem->read(memReq, data); - memReq->paddr = dest_addr; - cpuXC->mem->write(memReq, data); - if (dcacheInterface) { - memReq->cmd = Copy; - memReq->completionEvent = NULL; - memReq->paddr = cpuXC->copySrcPhysAddr; - memReq->dest = dest_addr; - memReq->size = 64; - memReq->time = curTick; - memReq->flags &= ~INST_READ; - dcacheInterface->access(memReq); - } - } - else - assert(!fault->isAlignmentFault()); - - return fault; -#else - panic("copy not implemented"); - return NoFault; -#endif -} - -// precise architected memory state accessor macros -template <class T> -Fault -SimpleCPU::read(Addr addr, T &data, unsigned flags) -{ - if (status() == DcacheWaitResponse || status() == DcacheWaitSwitch) { -// Fault fault = xc->read(memReq,data); - // Not sure what to check for no fault... - if (data_read_pkt->result == Success) { - data = data_read_pkt->get<T>(); - } - - if (traceData) { - traceData->setAddr(data_read_req->getVaddr()); - } - - // @todo: Figure out a way to create a Fault from the packet result. - return NoFault; - } - -// memReq->reset(addr, sizeof(T), flags); - -#if SIMPLE_CPU_MEM_TIMING - CpuRequest *data_read_req = new Request(true); -#endif - - data_read_req->setVaddr(addr); - data_read_req->setSize(sizeof(T)); - data_read_req->setFlags(flags); - data_read_req->setTime(curTick); - - // translate to physical address - Fault fault = cpuXC->translateDataReadReq(data_read_req); - - // Now do the access. - if (fault == NoFault) { -#if SIMPLE_CPU_MEM_TIMING - data_read_pkt = new Packet; - data_read_pkt->cmd = Read; - data_read_pkt->req = data_read_req; - data_read_pkt->data = new uint8_t[8]; -#endif - data_read_pkt->reset(); - data_read_pkt->addr = data_read_req->getPaddr(); - data_read_pkt->size = sizeof(T); - - sendDcacheRequest(data_read_pkt); - -#if SIMPLE_CPU_MEM_IMMEDIATE - // Need to find a way to not duplicate code above. - - if (data_read_pkt->result == Success) { - data = data_read_pkt->get<T>(); - } - - if (traceData) { - traceData->setAddr(addr); - } - - // @todo: Figure out a way to create a Fault from the packet result. - return NoFault; -#endif - } -/* - memReq->cmd = Read; - memReq->completionEvent = NULL; - memReq->time = curTick; - memReq->flags &= ~INST_READ; - MemAccessResult result = dcacheInterface->access(memReq); - - // Ugly hack to get an event scheduled *only* if the access is - // a miss. We really should add first-class support for this - // at some point. - if (result != MA_HIT && dcacheInterface->doEvents()) { - memReq->completionEvent = &cacheCompletionEvent; - lastDcacheStall = curTick; - unscheduleTickEvent(); - _status = DcacheMissStall; - } else { - // do functional access - fault = cpuXC->read(memReq, data); - - } - } else if(fault == NoFault) { - // do functional access - fault = cpuXC->read(memReq, data); - - } -*/ - // This will need a new way to tell if it has a dcache attached. - if (data_read_req->getFlags() & UNCACHEABLE) - recordEvent("Uncached Read"); - - return fault; -} - -#ifndef DOXYGEN_SHOULD_SKIP_THIS - -template -Fault -SimpleCPU::read(Addr addr, uint64_t &data, unsigned flags); - -template -Fault -SimpleCPU::read(Addr addr, uint32_t &data, unsigned flags); - -template -Fault -SimpleCPU::read(Addr addr, uint16_t &data, unsigned flags); - -template -Fault -SimpleCPU::read(Addr addr, uint8_t &data, unsigned flags); - -#endif //DOXYGEN_SHOULD_SKIP_THIS - -template<> -Fault -SimpleCPU::read(Addr addr, double &data, unsigned flags) -{ - return read(addr, *(uint64_t*)&data, flags); -} - -template<> -Fault -SimpleCPU::read(Addr addr, float &data, unsigned flags) -{ - return read(addr, *(uint32_t*)&data, flags); -} - - -template<> -Fault -SimpleCPU::read(Addr addr, int32_t &data, unsigned flags) -{ - return read(addr, (uint32_t&)data, flags); -} - - -template <class T> -Fault -SimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) -{ - data_write_req->setVaddr(addr); - data_write_req->setTime(curTick); - data_write_req->setSize(sizeof(T)); - data_write_req->setFlags(flags); - - // translate to physical address - Fault fault = cpuXC->translateDataWriteReq(data_write_req); - // Now do the access. - if (fault == NoFault) { -#if SIMPLE_CPU_MEM_TIMING - data_write_pkt = new Packet; - data_write_pkt->cmd = Write; - data_write_pkt->req = data_write_req; - data_write_pkt->allocate(); - data_write_pkt->set(data); -#else - data_write_pkt->reset(); - data = htog(data); - data_write_pkt->dataStatic(&data); -#endif - data_write_pkt->addr = data_write_req->getPaddr(); - data_write_pkt->size = sizeof(T); - - sendDcacheRequest(data_write_pkt); - } - -/* - // do functional access - if (fault == NoFault) - fault = cpuXC->write(memReq, data); - - if (fault == NoFault && dcacheInterface) { - memReq->cmd = Write; - memcpy(memReq->data,(uint8_t *)&data,memReq->size); - memReq->completionEvent = NULL; - memReq->time = curTick; - memReq->flags &= ~INST_READ; - MemAccessResult result = dcacheInterface->access(memReq); - - // Ugly hack to get an event scheduled *only* if the access is - // a miss. We really should add first-class support for this - // at some point. - if (result != MA_HIT && dcacheInterface->doEvents()) { - memReq->completionEvent = &cacheCompletionEvent; - lastDcacheStall = curTick; - unscheduleTickEvent(); - _status = DcacheMissStall; - } - } -*/ - if (res && (fault == NoFault)) - *res = data_write_pkt->result; - - // This will need a new way to tell if it's hooked up to a cache or not. - if (data_write_req->getFlags() & UNCACHEABLE) - recordEvent("Uncached Write"); - - // @todo this is a hack and only works on uniprocessor systems some one else - // can implement LL/SC. - if (data_write_req->getFlags() & LOCKED) - *res = 1; - - // If the write needs to have a fault on the access, consider calling - // changeStatus() and changing it to "bad addr write" or something. - return fault; -} - - -#ifndef DOXYGEN_SHOULD_SKIP_THIS -template -Fault -SimpleCPU::write(uint64_t data, Addr addr, unsigned flags, uint64_t *res); - -template -Fault -SimpleCPU::write(uint32_t data, Addr addr, unsigned flags, uint64_t *res); - -template -Fault -SimpleCPU::write(uint16_t data, Addr addr, unsigned flags, uint64_t *res); - -template -Fault -SimpleCPU::write(uint8_t data, Addr addr, unsigned flags, uint64_t *res); - -#endif //DOXYGEN_SHOULD_SKIP_THIS - -template<> -Fault -SimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res) -{ - return write(*(uint64_t*)&data, addr, flags, res); -} - -template<> -Fault -SimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res) -{ - return write(*(uint32_t*)&data, addr, flags, res); -} - - -template<> -Fault -SimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res) -{ - return write((uint32_t)data, addr, flags, res); -} - - -#if FULL_SYSTEM -Addr -SimpleCPU::dbg_vtophys(Addr addr) -{ - return vtophys(xcProxy, addr); -} -#endif // FULL_SYSTEM - -void -SimpleCPU::sendIcacheRequest(Packet *pkt) -{ - assert(!tickEvent.scheduled()); -#if SIMPLE_CPU_MEM_TIMING - retry_pkt = pkt; - bool success = icachePort.sendTiming(*pkt); - - unscheduleTickEvent(); - - lastIcacheStall = curTick; - - if (!success) { - // Need to wait for retry - _status = IcacheRetry; - } else { - // Need to wait for cache to respond - _status = IcacheWaitResponse; - } -#elif SIMPLE_CPU_MEM_ATOMIC - Tick latency = icachePort.sendAtomic(*pkt); - - unscheduleTickEvent(); - scheduleTickEvent(latency); - - // Note that Icache miss cycles will be incorrect. Unless - // we check the status of the packet sent (is this valid?), - // we won't know if the latency is a hit or a miss. - icacheStallCycles += latency; - - _status = IcacheAccessComplete; -#elif SIMPLE_CPU_MEM_IMMEDIATE - icachePort.sendAtomic(*pkt); -#else -#error "SimpleCPU has no mem model set" -#endif -} - -void -SimpleCPU::sendDcacheRequest(Packet *pkt) -{ - assert(!tickEvent.scheduled()); -#if SIMPLE_CPU_MEM_TIMING - unscheduleTickEvent(); - - retry_pkt = pkt; - bool success = dcachePort.sendTiming(*pkt); - - lastDcacheStall = curTick; - - if (!success) { - _status = DcacheRetry; - } else { - _status = DcacheWaitResponse; - } -#elif SIMPLE_CPU_MEM_ATOMIC - unscheduleTickEvent(); - - Tick latency = dcachePort.sendAtomic(*pkt); - - scheduleTickEvent(latency); - - // Note that Dcache miss cycles will be incorrect. Unless - // we check the status of the packet sent (is this valid?), - // we won't know if the latency is a hit or a miss. - dcacheStallCycles += latency; -#elif SIMPLE_CPU_MEM_IMMEDIATE - dcachePort.sendAtomic(*pkt); -#else -#error "SimpleCPU has no mem model set" -#endif -} - -void -SimpleCPU::processResponse(Packet &response) -{ - assert(SIMPLE_CPU_MEM_TIMING); - - // For what things is the CPU the consumer of the packet it sent - // out? This may create a memory leak if that's the case and it's - // expected of the SimpleCPU to delete its own packet. - Packet *pkt = &response; - - switch (status()) { - case IcacheWaitResponse: - icacheStallCycles += curTick - lastIcacheStall; - - _status = IcacheAccessComplete; - scheduleTickEvent(1); - - // Copy the icache data into the instruction itself. - inst = pkt->get<MachInst>(); - - delete pkt; - break; - case DcacheWaitResponse: - if (pkt->cmd == Read) { - curStaticInst->execute(this,traceData); - if (traceData) - traceData->finalize(); - } - - delete pkt; - - dcacheStallCycles += curTick - lastDcacheStall; - _status = Running; - scheduleTickEvent(1); - break; - case DcacheWaitSwitch: - if (pkt->cmd == Read) { - curStaticInst->execute(this,traceData); - if (traceData) - traceData->finalize(); - } - - delete pkt; - - _status = SwitchedOut; - sampler->signalSwitched(); - case SwitchedOut: - // If this CPU has been switched out due to sampling/warm-up, - // ignore any further status changes (e.g., due to cache - // misses outstanding at the time of the switch). - delete pkt; - - return; - default: - panic("SimpleCPU::processCacheCompletion: bad state"); - break; - } -} - -Packet * -SimpleCPU::processRetry() -{ -#if SIMPLE_CPU_MEM_TIMING - switch(status()) { - case IcacheRetry: - icacheRetryCycles += curTick - lastIcacheStall; - return retry_pkt; - break; - case DcacheRetry: - dcacheRetryCycles += curTick - lastDcacheStall; - return retry_pkt; - break; - default: - panic("SimpleCPU::processRetry: bad state"); - break; - } -#else - panic("shouldn't be here"); -#endif -} - -#if FULL_SYSTEM -void -SimpleCPU::post_interrupt(int int_num, int index) -{ - BaseCPU::post_interrupt(int_num, index); - - if (cpuXC->status() == ExecContext::Suspended) { - DPRINTF(IPI,"Suspended Processor awoke\n"); - cpuXC->activate(); - } -} -#endif // FULL_SYSTEM - -/* start simulation, program loaded, processor precise state initialized */ -void -SimpleCPU::tick() -{ - DPRINTF(SimpleCPU,"\n\n"); - - numCycles++; - - traceData = NULL; - - Fault fault = NoFault; - -#if FULL_SYSTEM - if (checkInterrupts && check_interrupts() && !cpuXC->inPalMode() && - status() != IcacheAccessComplete) { - int ipl = 0; - int summary = 0; - checkInterrupts = false; - - if (cpuXC->readMiscReg(IPR_SIRR)) { - for (int i = INTLEVEL_SOFTWARE_MIN; - i < INTLEVEL_SOFTWARE_MAX; i++) { - if (cpuXC->readMiscReg(IPR_SIRR) & (ULL(1) << i)) { - // See table 4-19 of 21164 hardware reference - ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1; - summary |= (ULL(1) << i); - } - } - } - - uint64_t interrupts = cpuXC->cpu->intr_status(); - for (int i = INTLEVEL_EXTERNAL_MIN; - i < INTLEVEL_EXTERNAL_MAX; i++) { - if (interrupts & (ULL(1) << i)) { - // See table 4-19 of 21164 hardware reference - ipl = i; - summary |= (ULL(1) << i); - } - } - - if (cpuXC->readMiscReg(IPR_ASTRR)) - panic("asynchronous traps not implemented\n"); - - if (ipl && ipl > cpuXC->readMiscReg(IPR_IPLR)) { - cpuXC->setMiscReg(IPR_ISR, summary); - cpuXC->setMiscReg(IPR_INTID, ipl); - - Fault(new InterruptFault)->invoke(xcProxy); - - DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n", - cpuXC->readMiscReg(IPR_IPLR), ipl, summary); - } - } -#endif - - // maintain $r0 semantics - cpuXC->setIntReg(ZeroReg, 0); -#if THE_ISA == ALPHA_ISA - cpuXC->setFloatReg(ZeroReg, 0.0); -#endif // ALPHA_ISA - - if (status() == IcacheAccessComplete) { - // We've already fetched an instruction and were stalled on an - // I-cache miss. No need to fetch it again. - - // Set status to running; tick event will get rescheduled if - // necessary at end of tick() function. - _status = Running; - } else { - // Try to fetch an instruction - - // set up memory request for instruction fetch - - DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p NNPC:%08p\n",cpuXC->readPC(), - cpuXC->readNextPC(),cpuXC->readNextNPC()); - -#if SIMPLE_CPU_MEM_TIMING - CpuRequest *ifetch_req = new CpuRequest(); - ifetch_req->setSize(sizeof(MachInst)); -#endif - - ifetch_req->resetMin(); - ifetch_req->setVaddr(cpuXC->readPC() & ~3); - ifetch_req->setTime(curTick); -#if FULL_SYSTEM - ifetch_req->setFlags((cpuXC->readPC() & 1) ? PHYSICAL : 0); -#else - ifetch_req->setFlags(0); -#endif - - fault = cpuXC->translateInstReq(ifetch_req); - - if (fault == NoFault) { -#if SIMPLE_CPU_MEM_TIMING - Packet *ifetch_pkt = new Packet; - ifetch_pkt->cmd = Read; - ifetch_pkt->data = (uint8_t *)&inst; - ifetch_pkt->req = ifetch_req; - ifetch_pkt->size = sizeof(MachInst); -#endif - ifetch_pkt->reset(); - ifetch_pkt->addr = ifetch_req->getPaddr(); - - sendIcacheRequest(ifetch_pkt); -#if SIMPLE_CPU_MEM_TIMING || SIMPLE_CPU_MEM_ATOMIC - return; -#endif -/* - if (icacheInterface && fault == NoFault) { - memReq->completionEvent = NULL; - - memReq->time = curTick; - memReq->flags |= INST_READ; - MemAccessResult result = icacheInterface->access(memReq); - - // Ugly hack to get an event scheduled *only* if the access is - // a miss. We really should add first-class support for this - // at some point. - if (result != MA_HIT && icacheInterface->doEvents()) { - memReq->completionEvent = &cacheCompletionEvent; - lastIcacheStall = curTick; - unscheduleTickEvent(); - _status = IcacheMissStall; - return; - } - } -*/ - } - } - - // If we've got a valid instruction (i.e., no fault on instruction - // fetch), then execute it. - if (fault == NoFault) { - - // keep an instruction count - numInst++; - numInsts++; - - // check for instruction-count-based events - comInstEventQueue[0]->serviceEvents(numInst); - - // decode the instruction - inst = gtoh(inst); - curStaticInst = StaticInst::decode(makeExtMI(inst, cpuXC->readPC())); - - traceData = Trace::getInstRecord(curTick, xcProxy, this, curStaticInst, - cpuXC->readPC()); - - DPRINTF(Decode,"Decode: Decoded %s instruction (opcode: 0x%x): 0x%x\n", - curStaticInst->getName(),curStaticInst->getOpcode(), curStaticInst->machInst); - -#if FULL_SYSTEM - cpuXC->setInst(inst); -#endif // FULL_SYSTEM - - cpuXC->func_exe_inst++; - - fault = curStaticInst->execute(this, traceData); - -#if FULL_SYSTEM - if (system->kernelBinning->fnbin) { - assert(kernelStats); - system->kernelBinning->execute(xcProxy, inst); - } - - if (cpuXC->profile) { - bool usermode = - (cpuXC->readMiscReg(AlphaISA::IPR_DTB_CM) & 0x18) != 0; - cpuXC->profilePC = usermode ? 1 : cpuXC->readPC(); - ProfileNode *node = cpuXC->profile->consume(xcProxy, inst); - if (node) - cpuXC->profileNode = node; - } -#endif - - if (curStaticInst->isMemRef()) { - numMemRefs++; - } - - if (curStaticInst->isLoad()) { - ++numLoad; - comLoadEventQueue[0]->serviceEvents(numLoad); - } - - // If we have a dcache miss, then we can't finialize the instruction - // trace yet because we want to populate it with the data later - if (traceData && (status() != DcacheWaitResponse)) { - traceData->finalize(); - } - - traceFunctions(cpuXC->readPC()); - - } // if (fault == NoFault) - - if (fault != NoFault) { -#if FULL_SYSTEM - fault->invoke(xcProxy); -#else // !FULL_SYSTEM - fatal("fault (%s) detected @ PC %08p", fault->name(), cpuXC->readPC()); -#endif // FULL_SYSTEM - } - else { -#if THE_ISA == ALPHA_ISA - // go to the next instruction - cpuXC->setPC(cpuXC->readNextPC()); - cpuXC->setNextPC(cpuXC->readNextPC() + sizeof(MachInst)); -#else - // go to the next instruction - cpuXC->setPC(cpuXC->readNextPC()); - cpuXC->setNextPC(cpuXC->readNextNPC()); - cpuXC->setNextNPC(cpuXC->readNextNPC() + sizeof(MachInst)); -#endif - - } - -#if FULL_SYSTEM - Addr oldpc; - do { - oldpc = cpuXC->readPC(); - system->pcEventQueue.service(xcProxy); - } while (oldpc != cpuXC->readPC()); -#endif - - assert(status() == Running || - status() == Idle || - status() == DcacheWaitResponse); - - if (status() == Running && !tickEvent.scheduled()) - tickEvent.schedule(curTick + cycles(1)); -} - -//////////////////////////////////////////////////////////////////////// -// -// SimpleCPU Simulation Object -// -BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleCPU) - - Param<Counter> max_insts_any_thread; - Param<Counter> max_insts_all_threads; - Param<Counter> max_loads_any_thread; - Param<Counter> max_loads_all_threads; - SimObjectParam<MemObject *> mem; - -#if FULL_SYSTEM - SimObjectParam<AlphaITB *> itb; - SimObjectParam<AlphaDTB *> dtb; - SimObjectParam<System *> system; - Param<int> cpu_id; - Param<Tick> profile; -#else - SimObjectParam<Process *> workload; -#endif // FULL_SYSTEM - - Param<int> clock; - - Param<bool> defer_registration; - Param<int> width; - Param<bool> function_trace; - Param<Tick> function_trace_start; - -END_DECLARE_SIM_OBJECT_PARAMS(SimpleCPU) - -BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleCPU) - - INIT_PARAM(max_insts_any_thread, - "terminate when any thread reaches this inst count"), - INIT_PARAM(max_insts_all_threads, - "terminate when all threads have reached this inst count"), - INIT_PARAM(max_loads_any_thread, - "terminate when any thread reaches this load count"), - INIT_PARAM(max_loads_all_threads, - "terminate when all threads have reached this load count"), - INIT_PARAM(mem, "memory"), - -#if FULL_SYSTEM - INIT_PARAM(itb, "Instruction TLB"), - INIT_PARAM(dtb, "Data TLB"), - INIT_PARAM(system, "system object"), - INIT_PARAM(cpu_id, "processor ID"), - INIT_PARAM(profile, ""), -#else - INIT_PARAM(workload, "processes to run"), -#endif // FULL_SYSTEM - - INIT_PARAM(clock, "clock speed"), - INIT_PARAM(defer_registration, "defer system registration (for sampling)"), - INIT_PARAM(width, "cpu width"), - INIT_PARAM(function_trace, "Enable function trace"), - INIT_PARAM(function_trace_start, "Cycle to start function trace") - -END_INIT_SIM_OBJECT_PARAMS(SimpleCPU) - - -CREATE_SIM_OBJECT(SimpleCPU) -{ - SimpleCPU::Params *params = new SimpleCPU::Params(); - params->name = getInstanceName(); - params->numberOfThreads = 1; - params->max_insts_any_thread = max_insts_any_thread; - params->max_insts_all_threads = max_insts_all_threads; - params->max_loads_any_thread = max_loads_any_thread; - params->max_loads_all_threads = max_loads_all_threads; - params->deferRegistration = defer_registration; - params->clock = clock; - params->functionTrace = function_trace; - params->functionTraceStart = function_trace_start; - params->width = width; - params->mem = mem; - -#if FULL_SYSTEM - params->itb = itb; - params->dtb = dtb; - params->system = system; - params->cpu_id = cpu_id; - params->profile = profile; -#else - params->process = workload; -#endif - - SimpleCPU *cpu = new SimpleCPU(params); - return cpu; -} - -REGISTER_SIM_OBJECT("SimpleCPU", SimpleCPU) - |