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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.
+ */
+
+#ifndef __CPU_BASE_DYN_INST_CC__
+#define __CPU_BASE_DYN_INST_CC__
+
+#include <iostream>
+#include <string>
+#include <sstream>
+
+#include "base/cprintf.hh"
+#include "base/trace.hh"
+
+#include "arch/faults.hh"
+#include "cpu/exetrace.hh"
+#include "mem/mem_req.hh"
+
+#include "cpu/base_dyn_inst.hh"
+#include "cpu/o3/alpha_impl.hh"
+#include "cpu/o3/alpha_cpu.hh"
+
+using namespace std;
+using namespace TheISA;
+
+#define NOHASH
+#ifndef NOHASH
+
+#include "base/hashmap.hh"
+
+unsigned int MyHashFunc(const BaseDynInst *addr)
+{
+ unsigned a = (unsigned)addr;
+ unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;
+
+ return hash;
+}
+
+typedef m5::hash_map<const BaseDynInst *, const BaseDynInst *, MyHashFunc> my_hash_t;
+my_hash_t thishash;
+#endif
+
+template <class Impl>
+BaseDynInst<Impl>::BaseDynInst(MachInst machInst, Addr inst_PC,
+ Addr pred_PC, InstSeqNum seq_num,
+ FullCPU *cpu)
+ : staticInst(machInst), traceData(NULL), cpu(cpu), cpuXC(cpu->cpuXCBase())
+{
+ seqNum = seq_num;
+
+ PC = inst_PC;
+ nextPC = PC + sizeof(MachInst);
+ predPC = pred_PC;
+
+ initVars();
+}
+
+template <class Impl>
+BaseDynInst<Impl>::BaseDynInst(StaticInstPtr &_staticInst)
+ : staticInst(_staticInst), traceData(NULL)
+{
+ initVars();
+}
+
+template <class Impl>
+void
+BaseDynInst<Impl>::initVars()
+{
+ effAddr = MemReq::inval_addr;
+ physEffAddr = MemReq::inval_addr;
+
+ readyRegs = 0;
+
+ completed = false;
+ canIssue = false;
+ issued = false;
+ executed = false;
+ canCommit = false;
+ squashed = false;
+ squashedInIQ = false;
+ eaCalcDone = false;
+
+ blockingInst = false;
+ recoverInst = false;
+
+ // Eventually make this a parameter.
+ threadNumber = 0;
+
+ // Also make this a parameter, or perhaps get it from xc or cpu.
+ asid = 0;
+
+ // Initialize the fault to be unimplemented opcode.
+ fault = new UnimplementedOpcodeFault;
+
+ ++instcount;
+
+ DPRINTF(FullCPU, "DynInst: Instruction created. Instcount=%i\n",
+ instcount);
+}
+
+template <class Impl>
+BaseDynInst<Impl>::~BaseDynInst()
+{
+ --instcount;
+ DPRINTF(FullCPU, "DynInst: Instruction destroyed. Instcount=%i\n",
+ instcount);
+}
+
+template <class Impl>
+void
+BaseDynInst<Impl>::prefetch(Addr addr, unsigned flags)
+{
+ // This is the "functional" implementation of prefetch. Not much
+ // happens here since prefetches don't affect the architectural
+ // state.
+
+ // Generate a MemReq so we can translate the effective address.
+ MemReqPtr req = new MemReq(addr, cpuXC->getProxy(), 1, flags);
+ req->asid = asid;
+
+ // Prefetches never cause faults.
+ fault = NoFault;
+
+ // note this is a local, not BaseDynInst::fault
+ Fault trans_fault = cpuXC->translateDataReadReq(req);
+
+ if (trans_fault == NoFault && !(req->flags & UNCACHEABLE)) {
+ // It's a valid address to cacheable space. Record key MemReq
+ // parameters so we can generate another one just like it for
+ // the timing access without calling translate() again (which
+ // might mess up the TLB).
+ effAddr = req->vaddr;
+ physEffAddr = req->paddr;
+ memReqFlags = req->flags;
+ } else {
+ // Bogus address (invalid or uncacheable space). Mark it by
+ // setting the eff_addr to InvalidAddr.
+ effAddr = physEffAddr = MemReq::inval_addr;
+ }
+
+ /**
+ * @todo
+ * Replace the disjoint functional memory with a unified one and remove
+ * this hack.
+ */
+#if !FULL_SYSTEM
+ req->paddr = req->vaddr;
+#endif
+
+ if (traceData) {
+ traceData->setAddr(addr);
+ }
+}
+
+template <class Impl>
+void
+BaseDynInst<Impl>::writeHint(Addr addr, int size, unsigned flags)
+{
+ // Need to create a MemReq here so we can do a translation. This
+ // will casue a TLB miss trap if necessary... not sure whether
+ // that's the best thing to do or not. We don't really need the
+ // MemReq otherwise, since wh64 has no functional effect.
+ MemReqPtr req = new MemReq(addr, cpuXC->getProxy(), size, flags);
+ req->asid = asid;
+
+ fault = cpuXC->translateDataWriteReq(req);
+
+ if (fault == NoFault && !(req->flags & UNCACHEABLE)) {
+ // Record key MemReq parameters so we can generate another one
+ // just like it for the timing access without calling translate()
+ // again (which might mess up the TLB).
+ effAddr = req->vaddr;
+ physEffAddr = req->paddr;
+ memReqFlags = req->flags;
+ } else {
+ // ignore faults & accesses to uncacheable space... treat as no-op
+ effAddr = physEffAddr = MemReq::inval_addr;
+ }
+
+ storeSize = size;
+ storeData = 0;
+}
+
+/**
+ * @todo Need to find a way to get the cache block size here.
+ */
+template <class Impl>
+Fault
+BaseDynInst<Impl>::copySrcTranslate(Addr src)
+{
+ MemReqPtr req = new MemReq(src, cpuXC->getProxy(), 64);
+ req->asid = asid;
+
+ // translate to physical address
+ Fault fault = cpuXC->translateDataReadReq(req);
+
+ if (fault == NoFault) {
+ cpuXC->copySrcAddr = src;
+ cpuXC->copySrcPhysAddr = req->paddr;
+ } else {
+ cpuXC->copySrcAddr = 0;
+ cpuXC->copySrcPhysAddr = 0;
+ }
+ return fault;
+}
+
+/**
+ * @todo Need to find a way to get the cache block size here.
+ */
+template <class Impl>
+Fault
+BaseDynInst<Impl>::copy(Addr dest)
+{
+ uint8_t data[64];
+ FunctionalMemory *mem = cpuXC->mem;
+ assert(cpuXC->copySrcPhysAddr || cpuXC->misspeculating());
+ MemReqPtr req = new MemReq(dest, cpuXC->getProxy(), 64);
+ req->asid = asid;
+
+ // translate to physical address
+ Fault fault = cpuXC->translateDataWriteReq(req);
+
+ if (fault == NoFault) {
+ Addr dest_addr = req->paddr;
+ // Need to read straight from memory since we have more than 8 bytes.
+ req->paddr = cpuXC->copySrcPhysAddr;
+ mem->read(req, data);
+ req->paddr = dest_addr;
+ mem->write(req, data);
+ }
+ return fault;
+}
+
+template <class Impl>
+void
+BaseDynInst<Impl>::dump()
+{
+ cprintf("T%d : %#08d `", threadNumber, PC);
+ cout << staticInst->disassemble(PC);
+ cprintf("'\n");
+}
+
+template <class Impl>
+void
+BaseDynInst<Impl>::dump(std::string &outstring)
+{
+ std::ostringstream s;
+ s << "T" << threadNumber << " : 0x" << PC << " "
+ << staticInst->disassemble(PC);
+
+ outstring = s.str();
+}
+
+
+#if 0
+template <class Impl>
+Fault
+BaseDynInst<Impl>::mem_access(mem_cmd cmd, Addr addr, void *p, int nbytes)
+{
+ Fault fault;
+
+ // check alignments, even speculative this test should always pass
+ if ((nbytes & nbytes - 1) != 0 || (addr & nbytes - 1) != 0) {
+ for (int i = 0; i < nbytes; i++)
+ ((char *) p)[i] = 0;
+
+ // I added the following because according to the comment above,
+ // we should never get here. The comment lies
+#if 0
+ panic("unaligned access. Cycle = %n", curTick);
+#endif
+ return NoFault;
+ }
+
+ MemReqPtr req = new MemReq(addr, thread, nbytes);
+ switch(cmd) {
+ case Read:
+ fault = spec_mem->read(req, (uint8_t *)p);
+ break;
+
+ case Write:
+ fault = spec_mem->write(req, (uint8_t *)p);
+ if (fault != NoFault)
+ break;
+
+ specMemWrite = true;
+ storeSize = nbytes;
+ switch(nbytes) {
+ case sizeof(uint8_t):
+ *(uint8_t)&storeData = (uint8_t *)p;
+ break;
+ case sizeof(uint16_t):
+ *(uint16_t)&storeData = (uint16_t *)p;
+ break;
+ case sizeof(uint32_t):
+ *(uint32_t)&storeData = (uint32_t *)p;
+ break;
+ case sizeof(uint64_t):
+ *(uint64_t)&storeData = (uint64_t *)p;
+ break;
+ }
+ break;
+
+ default:
+ fault = genMachineCheckFault();
+ break;
+ }
+
+ trace_mem(fault, cmd, addr, p, nbytes);
+
+ return fault;
+}
+
+#endif
+
+template <class Impl>
+bool
+BaseDynInst<Impl>::eaSrcsReady()
+{
+ // For now I am assuming that src registers 1..n-1 are the ones that the
+ // EA calc depends on. (i.e. src reg 0 is the source of the data to be
+ // stored)
+
+ for (int i = 1; i < numSrcRegs(); ++i)
+ {
+ if (!_readySrcRegIdx[i])
+ return false;
+ }
+
+ return true;
+}
+
+// Forward declaration
+template class BaseDynInst<AlphaSimpleImpl>;
+
+template <>
+int
+BaseDynInst<AlphaSimpleImpl>::instcount = 0;
+
+#endif // __CPU_BASE_DYN_INST_CC__
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