gem5/cpu/simple/cpu.hh
Kevin Lim 20eced3ea0 Merge ktlim@zizzer:/bk/m5
into  zamp.eecs.umich.edu:/z/ktlim2/m5-proxyxc

Further changes still need to be made to the XC code.

arch/alpha/ev5.cc:
arch/alpha/freebsd/system.cc:
arch/alpha/linux/system.cc:
base/remote_gdb.cc:
cpu/cpu_exec_context.cc:
cpu/cpu_exec_context.hh:
cpu/simple/cpu.cc:
cpu/simple/cpu.hh:
kern/kernel_stats.cc:
sim/pseudo_inst.cc:
    Hand merge.

--HG--
rename : kern/freebsd/freebsd_system.cc => arch/alpha/freebsd/system.cc
rename : kern/linux/linux_system.cc => arch/alpha/linux/system.cc
rename : kern/linux/linux_threadinfo.hh => arch/alpha/linux/threadinfo.hh
rename : arch/alpha/alpha_linux_process.cc => arch/alpha/linux_process.cc
rename : arch/alpha/alpha_memory.cc => arch/alpha/tlb.cc
rename : arch/alpha/alpha_tru64_process.cc => arch/alpha/tru64_process.cc
rename : cpu/exec_context.cc => cpu/cpu_exec_context.cc
rename : cpu/exec_context.hh => cpu/cpu_exec_context.hh
extra : convert_revision : c1fe71fdd87d1fcd376f4feec69fc3fa29152e3e
2006-03-05 00:34:54 -05:00

363 lines
9.9 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/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 ExecContext;
class MemInterface;
class Checkpoint;
namespace Trace {
class InstRecord;
}
class SimpleCPU : public BaseCPU
{
protected:
typedef TheISA::MachInst MachInst;
typedef TheISA::MiscReg MiscReg;
public:
// main simulation loop (one cycle)
void tick();
virtual void init();
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
CPUExecContext *cpuXC;
ExecContext *xcProxy;
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 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 *si, int idx)
{
return cpuXC->readIntReg(si->srcRegIdx(idx));
}
float readFloatRegSingle(const StaticInst *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return cpuXC->readFloatRegSingle(reg_idx);
}
double readFloatRegDouble(const StaticInst *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return cpuXC->readFloatRegDouble(reg_idx);
}
uint64_t readFloatRegInt(const StaticInst *si, int idx)
{
int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
return cpuXC->readFloatRegInt(reg_idx);
}
void setIntReg(const StaticInst *si, int idx, uint64_t val)
{
cpuXC->setIntReg(si->destRegIdx(idx), val);
}
void setFloatRegSingle(const StaticInst *si, int idx, float val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
cpuXC->setFloatRegSingle(reg_idx, val);
}
void setFloatRegDouble(const StaticInst *si, int idx, double val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
cpuXC->setFloatRegDouble(reg_idx, val);
}
void setFloatRegInt(const StaticInst *si, int idx, uint64_t val)
{
int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
cpuXC->setFloatRegInt(reg_idx, val);
}
uint64_t readPC() { return cpuXC->readPC(); }
void setNextPC(uint64_t val) { cpuXC->setNextPC(val); }
MiscReg readMiscReg(int misc_reg)
{
return cpuXC->readMiscReg(misc_reg);
}
MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault)
{
return cpuXC->readMiscRegWithEffect(misc_reg, fault);
}
Fault setMiscReg(int misc_reg, const MiscReg &val)
{
return cpuXC->setMiscReg(misc_reg, val);
}
Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val)
{
return cpuXC->setMiscRegWithEffect(misc_reg, val);
}
#if FULL_SYSTEM
Fault hwrei() { return cpuXC->hwrei(); }
int readIntrFlag() { return cpuXC->readIntrFlag(); }
void setIntrFlag(int val) { cpuXC->setIntrFlag(val); }
bool inPalMode() { return cpuXC->inPalMode(); }
void ev5_trap(Fault fault) { fault->invoke(xcProxy); }
bool simPalCheck(int palFunc) { return cpuXC->simPalCheck(palFunc); }
#else
void syscall() { cpuXC->syscall(); }
#endif
bool misspeculating() { return cpuXC->misspeculating(); }
ExecContext *xcBase() { return xcProxy; }
};
#endif // __CPU_SIMPLE_CPU_SIMPLE_CPU_HH__