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Diffstat (limited to 'cpu/base_dyn_inst.cc')
| -rw-r--r-- | cpu/base_dyn_inst.cc | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/cpu/base_dyn_inst.cc b/cpu/base_dyn_inst.cc new file mode 100644 index 000000000..bd681e1dc --- /dev/null +++ b/cpu/base_dyn_inst.cc @@ -0,0 +1,399 @@ +/* + * Copyright (c) 2001-2004 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 __BASE_DYN_INST_CC__ +#define __BASE_DYN_INST_CC__ + +#include <iostream> +#include <string> +#include <sstream> + +#include "base/cprintf.hh" + +#include "arch/alpha/faults.hh" +#include "cpu/exetrace.hh" +#include "mem/mem_req.hh" + +#include "cpu/base_dyn_inst.hh" +#include "cpu/beta_cpu/alpha_impl.hh" +#include "cpu/beta_cpu/alpha_full_cpu.hh" + +using namespace std; + +#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 + +/** This may need to be specific to an implementation. */ +//int BaseDynInst<Impl>::instcount = 0; + +//int break_inst = -1; + +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), xc(cpu->xcBase()) +{ + effAddr = MemReq::inval_addr; + physEffAddr = MemReq::inval_addr; + + readyRegs = 0; + + seqNum = seq_num; + + specMemWrite = false; + + canIssue = false; + issued = false; + executed = false; + canCommit = false; + squashed = false; + squashedInIQ = false; + + blockingInst = false; + recoverInst = false; + specMode = false; + btbMissed = false; + // Eventually make this a parameter. + threadNumber = 0; + // Also make this a parameter. + specMode = true; + // Also make this a parameter, or perhaps get it from xc or cpu. + asid = 0; + + // Initialize the fault to be unimplemented opcode. + fault = Unimplemented_Opcode_Fault; + + PC = inst_PC; + nextPC = PC + sizeof(MachInst); + predPC = pred_PC; + + // Make sure to have the renamed register entries set to the same + // as the normal register entries. It will allow the IQ to work + // without any modifications. + for (int i = 0; i < staticInst->numDestRegs(); i++) + { + _destRegIdx[i] = staticInst->destRegIdx(i); + } + + for (int i = 0; i < staticInst->numSrcRegs(); i++) + { + _srcRegIdx[i] = staticInst->srcRegIdx(i); + _readySrcRegIdx[i] = 0; + } + + ++instcount; + + DPRINTF(FullCPU, "DynInst: Instruction created. Instcount=%i\n", + instcount); +} + +template<class Impl> +BaseDynInst<Impl>::BaseDynInst(StaticInstPtr<ISA> &_staticInst) + : staticInst(_staticInst), traceData(NULL) +{ + effAddr = MemReq::inval_addr; + physEffAddr = MemReq::inval_addr; + + specMemWrite = false; + + blockingInst = false; + recoverInst = false; + specMode = false; + btbMissed = false; + + // Make sure to have the renamed register entries set to the same + // as the normal register entries. It will allow the IQ to work + // without any modifications. + for (int i = 0; i < staticInst->numDestRegs(); i++) + { + _destRegIdx[i] = staticInst->destRegIdx(i); + } + + for (int i = 0; i < staticInst->numSrcRegs(); i++) + { + _srcRegIdx[i] = staticInst->srcRegIdx(i); + } +} + +template<class Impl> +BaseDynInst<Impl>::~BaseDynInst() +{ +/* + if (specMemWrite) { + // Remove effects of this instruction from speculative memory + xc->spec_mem->erase(effAddr); + } +*/ + --instcount; + DPRINTF(FullCPU, "DynInst: Instruction destroyed. Instcount=%i\n", + instcount); +} + +template<class Impl> +FunctionalMemory * +BaseDynInst<Impl>::getMemory(void) +{ + return xc->mem; +} +/* +template<class Impl> +IntReg * +BaseDynInst<Impl>::getIntegerRegs(void) +{ + return (spec_mode ? xc->specIntRegFile : xc->regs.intRegFile); +} +*/ +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, xc, 1, flags); + req->asid = asid; + + // Prefetches never cause faults. + fault = No_Fault; + + // note this is a local, not BaseDynInst::fault + Fault trans_fault = xc->translateDataReadReq(req); + + if (trans_fault == No_Fault && !(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. + */ +#ifndef 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, xc, size, flags); + req->asid = asid; + + fault = xc->translateDataWriteReq(req); + + if (fault == No_Fault && !(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, xc, 64); + req->asid = asid; + + // translate to physical address + Fault fault = xc->translateDataReadReq(req); + + if (fault == No_Fault) { + xc->copySrcAddr = src; + xc->copySrcPhysAddr = req->paddr; + } else { + xc->copySrcAddr = 0; + xc->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 = xc->mem; + assert(xc->copySrcPhysAddr || xc->misspeculating()); + MemReqPtr req = new MemReq(dest, xc, 64); + req->asid = asid; + + // translate to physical address + Fault fault = xc->translateDataWriteReq(req); + + if (fault == No_Fault) { + Addr dest_addr = req->paddr; + // Need to read straight from memory since we have more than 8 bytes. + req->paddr = xc->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 No_Fault; + } + + 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 != No_Fault) + 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 = Machine_Check_Fault; + break; + } + + trace_mem(fault, cmd, addr, p, nbytes); + + return fault; +} + +#endif + +int +BaseDynInst<AlphaSimpleImpl>::instcount = 0; + +// Forward declaration... +template BaseDynInst<AlphaSimpleImpl>; + +#endif // __BASE_DYN_INST_CC__ |