gem5/cpu/simple/cpu.hh
Steve Reinhardt c4793184bd Build options are set via a build_options file in the
build directory instead of being inferred from the name
of the build directory.
Options are passed to C++ via config/*.hh files instead of
via the command line.  Build option flags are now always
defined to 0 or 1, so checks must use '#if' rather than
'#ifdef'.

SConscript:
    MySQL detection moved to SConstruct.
    Add config/*.hh files (via ConfigFile builder).
arch/alpha/alpha_memory.cc:
arch/alpha/ev5.cc:
arch/alpha/ev5.hh:
arch/alpha/isa_traits.hh:
base/fast_alloc.hh:
base/statistics.cc:
base/statistics.hh:
base/stats/events.cc:
base/stats/events.hh:
cpu/base.cc:
cpu/base.hh:
cpu/base_dyn_inst.cc:
cpu/base_dyn_inst.hh:
cpu/exec_context.cc:
cpu/exec_context.hh:
cpu/o3/alpha_cpu.hh:
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_cpu_impl.hh:
cpu/o3/alpha_dyn_inst.hh:
cpu/o3/alpha_dyn_inst_impl.hh:
cpu/o3/alpha_params.hh:
cpu/o3/commit_impl.hh:
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
cpu/o3/fetch_impl.hh:
cpu/o3/iew.hh:
cpu/o3/iew_impl.hh:
cpu/o3/regfile.hh:
cpu/o3/rename_impl.hh:
cpu/o3/rob_impl.hh:
cpu/ozone/cpu.hh:
cpu/pc_event.cc:
cpu/simple/cpu.cc:
cpu/simple/cpu.hh:
sim/process.cc:
sim/process.hh:
    Convert compile flags from def/undef to 0/1.
    Set via #include config/*.hh instead of command line.
arch/alpha/isa_desc:
    Convert compile flags from def/undef to 0/1.
    Set via #include config/*.hh instead of command line.
    Revamp fenv.h support... most of the ugliness is hidden
    in base/fenv.hh now.
base/mysql.hh:
    Fix typo in #ifndef guard.
build/SConstruct:
    Build options are set via a build_options file in the
    build directory instead of being inferred from the name
    of the build directory.
    Options are passed to C++ via config/*.hh files instead of
    via the command line.
python/SConscript:
    Generate m5_build_env directly from scons options
    instead of indirectly via CPPDEFINES.
python/m5/convert.py:
    Allow '0' and '1' for booleans.
    Rewrite toBool to use dict.
base/fenv.hh:
    Revamp <fenv.h> support to make it a compile option
    (so we can test w/o it even if it's present) and to
    make isa_desc cleaner.

--HG--
extra : convert_revision : 8f97dc11185bef5e1865b3269c7341df8525c9ad
2005-08-30 13:18:54 -04:00

344 lines
9.6 KiB
C++

/*
* 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.
*/
#ifndef __CPU_SIMPLE_CPU_SIMPLE_CPU_HH__
#define __CPU_SIMPLE_CPU_SIMPLE_CPU_HH__
#include "base/statistics.hh"
#include "config/full_system.hh"
#include "cpu/base.hh"
#include "cpu/exec_context.hh"
#include "cpu/pc_event.hh"
#include "cpu/sampler/sampler.hh"
#include "cpu/static_inst.hh"
#include "sim/eventq.hh"
// forward declarations
#if FULL_SYSTEM
class Processor;
class AlphaITB;
class AlphaDTB;
class PhysicalMemory;
class RemoteGDB;
class GDBListener;
#else
class Process;
#endif // FULL_SYSTEM
class MemInterface;
class Checkpoint;
namespace Trace {
class InstRecord;
}
class SimpleCPU : public BaseCPU
{
public:
// main simulation loop (one cycle)
void tick();
private:
struct TickEvent : public Event
{
SimpleCPU *cpu;
int width;
TickEvent(SimpleCPU *c, int w);
void process();
const char *description();
};
TickEvent tickEvent;
/// Schedule tick event, regardless of its current state.
void scheduleTickEvent(int numCycles)
{
if (tickEvent.squashed())
tickEvent.reschedule(curTick + cycles(numCycles));
else if (!tickEvent.scheduled())
tickEvent.schedule(curTick + cycles(numCycles));
}
/// Unschedule tick event, regardless of its current state.
void unscheduleTickEvent()
{
if (tickEvent.scheduled())
tickEvent.squash();
}
private:
Trace::InstRecord *traceData;
public:
//
enum Status {
Running,
Idle,
IcacheMissStall,
IcacheMissComplete,
DcacheMissStall,
DcacheMissSwitch,
SwitchedOut
};
private:
Status _status;
public:
void post_interrupt(int int_num, int index);
void zero_fill_64(Addr addr) {
static int warned = 0;
if (!warned) {
warn ("WH64 is not implemented");
warned = 1;
}
};
public:
struct Params : public BaseCPU::Params
{
MemInterface *icache_interface;
MemInterface *dcache_interface;
int width;
#if FULL_SYSTEM
AlphaITB *itb;
AlphaDTB *dtb;
FunctionalMemory *mem;
#else
Process *process;
#endif
};
SimpleCPU(Params *params);
virtual ~SimpleCPU();
public:
// execution context
ExecContext *xc;
void switchOut(Sampler *s);
void takeOverFrom(BaseCPU *oldCPU);
#if FULL_SYSTEM
Addr dbg_vtophys(Addr addr);
bool interval_stats;
#endif
// L1 instruction cache
MemInterface *icacheInterface;
// L1 data cache
MemInterface *dcacheInterface;
// current instruction
MachInst inst;
// Refcounted pointer to the one memory request.
MemReqPtr memReq;
// Pointer to the sampler that is telling us to switchover.
// Used to signal the completion of the pipe drain and schedule
// the next switchover
Sampler *sampler;
StaticInstPtr<TheISA> curStaticInst;
class CacheCompletionEvent : public Event
{
private:
SimpleCPU *cpu;
public:
CacheCompletionEvent(SimpleCPU *_cpu);
virtual void process();
virtual const char *description();
};
CacheCompletionEvent cacheCompletionEvent;
Status status() const { return _status; }
virtual void activateContext(int thread_num, int delay);
virtual void suspendContext(int thread_num);
virtual void deallocateContext(int thread_num);
virtual void haltContext(int thread_num);
// statistics
virtual void regStats();
virtual void resetStats();
// number of simulated instructions
Counter numInst;
Counter startNumInst;
Stats::Scalar<> numInsts;
virtual Counter totalInstructions() const
{
return numInst - startNumInst;
}
// number of simulated memory references
Stats::Scalar<> numMemRefs;
// number of simulated loads
Counter numLoad;
Counter startNumLoad;
// number of idle cycles
Stats::Average<> notIdleFraction;
Stats::Formula idleFraction;
// number of cycles stalled for I-cache misses
Stats::Scalar<> icacheStallCycles;
Counter lastIcacheStall;
// number of cycles stalled for D-cache misses
Stats::Scalar<> dcacheStallCycles;
Counter lastDcacheStall;
void processCacheCompletion();
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);
template <class T>
Fault read(Addr addr, T &data, unsigned flags);
template <class T>
Fault write(T data, Addr addr, unsigned flags, uint64_t *res);
// These functions are only used in CPU models that split
// effective address computation from the actual memory access.
void setEA(Addr EA) { panic("SimpleCPU::setEA() not implemented\n"); }
Addr getEA() { panic("SimpleCPU::getEA() not implemented\n"); }
void prefetch(Addr addr, unsigned flags)
{
// need to do this...
}
void writeHint(Addr addr, int size, unsigned flags)
{
// need to do this...
}
Fault copySrcTranslate(Addr src);
Fault copy(Addr dest);
// The register accessor methods provide the index of the
// instruction's operand (e.g., 0 or 1), not the architectural
// register index, to simplify the implementation of register
// renaming. We find the architectural register index by indexing
// into the instruction's own operand index table. Note that a
// raw pointer to the StaticInst is provided instead of a
// ref-counted StaticInstPtr to redice overhead. This is fine as
// long as these methods don't copy the pointer into any long-term
// storage (which is pretty hard to imagine they would have reason
// to do).
uint64_t readIntReg(const StaticInst<TheISA> *si, int idx)
{
return xc->readIntReg(si->srcRegIdx(idx));
}
float readFloatRegSingle(const StaticInst<TheISA> *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return xc->readFloatRegSingle(reg_idx);
}
double readFloatRegDouble(const StaticInst<TheISA> *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return xc->readFloatRegDouble(reg_idx);
}
uint64_t readFloatRegInt(const StaticInst<TheISA> *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return xc->readFloatRegInt(reg_idx);
}
void setIntReg(const StaticInst<TheISA> *si, int idx, uint64_t val)
{
xc->setIntReg(si->destRegIdx(idx), val);
}
void setFloatRegSingle(const StaticInst<TheISA> *si, int idx, float val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
xc->setFloatRegSingle(reg_idx, val);
}
void setFloatRegDouble(const StaticInst<TheISA> *si, int idx, double val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
xc->setFloatRegDouble(reg_idx, val);
}
void setFloatRegInt(const StaticInst<TheISA> *si, int idx, uint64_t val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
xc->setFloatRegInt(reg_idx, val);
}
uint64_t readPC() { return xc->readPC(); }
void setNextPC(uint64_t val) { xc->setNextPC(val); }
uint64_t readUniq() { return xc->readUniq(); }
void setUniq(uint64_t val) { xc->setUniq(val); }
uint64_t readFpcr() { return xc->readFpcr(); }
void setFpcr(uint64_t val) { xc->setFpcr(val); }
#if FULL_SYSTEM
uint64_t readIpr(int idx, Fault &fault) { return xc->readIpr(idx, fault); }
Fault setIpr(int idx, uint64_t val) { return xc->setIpr(idx, val); }
Fault hwrei() { return xc->hwrei(); }
int readIntrFlag() { return xc->readIntrFlag(); }
void setIntrFlag(int val) { xc->setIntrFlag(val); }
bool inPalMode() { return xc->inPalMode(); }
void ev5_trap(Fault fault) { xc->ev5_trap(fault); }
bool simPalCheck(int palFunc) { return xc->simPalCheck(palFunc); }
#else
void syscall() { xc->syscall(); }
#endif
bool misspeculating() { return xc->misspeculating(); }
ExecContext *xcBase() { return xc; }
};
#endif // __CPU_SIMPLE_CPU_SIMPLE_CPU_HH__