b14bf03219
cpu/o3/alpha_cpu.hh:
Store conditionals should not write their data to memory if they failed.
cpu/o3/lsq_unit.hh:
Setup request parameters when they're needed.
--HG--
extra : convert_revision : d75cd7deda03584b7e25cb567e4d79032cac7118
450 lines
14 KiB
C++
450 lines
14 KiB
C++
/*
|
|
* 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_O3_ALPHA_FULL_CPU_HH__
|
|
#define __CPU_O3_ALPHA_FULL_CPU_HH__
|
|
|
|
#include "arch/isa_traits.hh"
|
|
#include "cpu/exec_context.hh"
|
|
#include "cpu/o3/cpu.hh"
|
|
#include "sim/byteswap.hh"
|
|
|
|
template <class Impl>
|
|
class AlphaFullCPU : public FullO3CPU<Impl>
|
|
{
|
|
protected:
|
|
typedef TheISA::IntReg IntReg;
|
|
typedef TheISA::MiscReg MiscReg;
|
|
typedef TheISA::RegFile RegFile;
|
|
typedef TheISA::MiscRegFile MiscRegFile;
|
|
|
|
public:
|
|
typedef O3ThreadState<Impl> ImplState;
|
|
typedef O3ThreadState<Impl> Thread;
|
|
typedef typename Impl::Params Params;
|
|
|
|
/** Constructs an AlphaFullCPU with the given parameters. */
|
|
AlphaFullCPU(Params *params);
|
|
|
|
class AlphaXC : public ExecContext
|
|
{
|
|
public:
|
|
AlphaFullCPU<Impl> *cpu;
|
|
|
|
O3ThreadState<Impl> *thread;
|
|
|
|
Tick lastActivate;
|
|
Tick lastSuspend;
|
|
|
|
Event *quiesceEvent;
|
|
|
|
virtual BaseCPU *getCpuPtr() { return cpu; }
|
|
|
|
virtual void setCpuId(int id) { cpu->cpu_id = id; }
|
|
|
|
virtual int readCpuId() { return cpu->cpu_id; }
|
|
|
|
virtual FunctionalMemory *getMemPtr() { return thread->mem; }
|
|
|
|
#if FULL_SYSTEM
|
|
virtual System *getSystemPtr() { return cpu->system; }
|
|
|
|
virtual PhysicalMemory *getPhysMemPtr() { return cpu->physmem; }
|
|
|
|
virtual AlphaITB *getITBPtr() { return cpu->itb; }
|
|
|
|
virtual AlphaDTB * getDTBPtr() { return cpu->dtb; }
|
|
#else
|
|
virtual Process *getProcessPtr() { return thread->process; }
|
|
#endif
|
|
|
|
virtual Status status() const { return thread->status(); }
|
|
|
|
virtual void setStatus(Status new_status) { thread->setStatus(new_status); }
|
|
|
|
/// Set the status to Active. Optional delay indicates number of
|
|
/// cycles to wait before beginning execution.
|
|
virtual void activate(int delay = 1);
|
|
|
|
/// Set the status to Suspended.
|
|
virtual void suspend();
|
|
|
|
/// Set the status to Unallocated.
|
|
virtual void deallocate();
|
|
|
|
/// Set the status to Halted.
|
|
virtual void halt();
|
|
|
|
#if FULL_SYSTEM
|
|
virtual void dumpFuncProfile();
|
|
#endif
|
|
|
|
virtual void takeOverFrom(ExecContext *old_context);
|
|
|
|
virtual void regStats(const std::string &name);
|
|
|
|
virtual void serialize(std::ostream &os);
|
|
virtual void unserialize(Checkpoint *cp, const std::string §ion);
|
|
|
|
#if FULL_SYSTEM
|
|
virtual Event *getQuiesceEvent();
|
|
|
|
// Not necessarily the best location for these...
|
|
// Having an extra function just to read these is obnoxious
|
|
virtual Tick readLastActivate();
|
|
virtual Tick readLastSuspend();
|
|
|
|
virtual void profileClear();
|
|
virtual void profileSample();
|
|
#endif
|
|
|
|
virtual int getThreadNum() { return thread->tid; }
|
|
|
|
// Also somewhat obnoxious. Really only used for the TLB fault.
|
|
// However, may be quite useful in SPARC.
|
|
virtual TheISA::MachInst getInst();
|
|
|
|
virtual void copyArchRegs(ExecContext *xc);
|
|
|
|
virtual void clearArchRegs();
|
|
|
|
//
|
|
// New accessors for new decoder.
|
|
//
|
|
virtual uint64_t readIntReg(int reg_idx);
|
|
|
|
virtual float readFloatRegSingle(int reg_idx);
|
|
|
|
virtual double readFloatRegDouble(int reg_idx);
|
|
|
|
virtual uint64_t readFloatRegInt(int reg_idx);
|
|
|
|
virtual void setIntReg(int reg_idx, uint64_t val);
|
|
|
|
virtual void setFloatRegSingle(int reg_idx, float val);
|
|
|
|
virtual void setFloatRegDouble(int reg_idx, double val);
|
|
|
|
virtual void setFloatRegInt(int reg_idx, uint64_t val);
|
|
|
|
virtual uint64_t readPC()
|
|
{ return cpu->readPC(thread->tid); }
|
|
|
|
virtual void setPC(uint64_t val);
|
|
|
|
virtual uint64_t readNextPC()
|
|
{ return cpu->readNextPC(thread->tid); }
|
|
|
|
virtual void setNextPC(uint64_t val);
|
|
|
|
virtual MiscReg readMiscReg(int misc_reg)
|
|
{ return cpu->readMiscReg(misc_reg, thread->tid); }
|
|
|
|
virtual MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault)
|
|
{ return cpu->readMiscRegWithEffect(misc_reg, fault, thread->tid); }
|
|
|
|
virtual Fault setMiscReg(int misc_reg, const MiscReg &val);
|
|
|
|
virtual Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val);
|
|
|
|
// Also not necessarily the best location for these two.
|
|
// Hopefully will go away once we decide upon where st cond
|
|
// failures goes.
|
|
virtual unsigned readStCondFailures() { return thread->storeCondFailures; }
|
|
|
|
virtual void setStCondFailures(unsigned sc_failures) { thread->storeCondFailures = sc_failures; }
|
|
|
|
#if FULL_SYSTEM
|
|
virtual bool inPalMode() { return TheISA::PcPAL(cpu->readPC(thread->tid)); }
|
|
#endif
|
|
|
|
// Only really makes sense for old CPU model. Still could be useful though.
|
|
virtual bool misspeculating() { return false; }
|
|
|
|
#if !FULL_SYSTEM
|
|
virtual IntReg getSyscallArg(int i);
|
|
|
|
// used to shift args for indirect syscall
|
|
virtual void setSyscallArg(int i, IntReg val);
|
|
|
|
virtual void setSyscallReturn(SyscallReturn return_value);
|
|
|
|
virtual void syscall() { return cpu->syscall(thread->tid); }
|
|
|
|
// Same with st cond failures.
|
|
virtual Counter readFuncExeInst() { return thread->funcExeInst; }
|
|
#endif
|
|
};
|
|
|
|
friend class AlphaXC;
|
|
|
|
std::vector<AlphaXC *> xcProxies;
|
|
|
|
#if FULL_SYSTEM
|
|
/** ITB pointer. */
|
|
AlphaITB *itb;
|
|
/** DTB pointer. */
|
|
AlphaDTB *dtb;
|
|
#endif
|
|
|
|
/** Registers statistics. */
|
|
void regStats();
|
|
|
|
#if FULL_SYSTEM
|
|
//Note that the interrupt stuff from the base CPU might be somewhat
|
|
//ISA specific (ie NumInterruptLevels). These functions might not
|
|
//be needed in FullCPU though.
|
|
// void post_interrupt(int int_num, int index);
|
|
// void clear_interrupt(int int_num, int index);
|
|
// void clear_interrupts();
|
|
|
|
/** Translates instruction requestion. */
|
|
Fault translateInstReq(MemReqPtr &req)
|
|
{
|
|
return itb->translate(req);
|
|
}
|
|
|
|
/** Translates data read request. */
|
|
Fault translateDataReadReq(MemReqPtr &req)
|
|
{
|
|
return dtb->translate(req, false);
|
|
}
|
|
|
|
/** Translates data write request. */
|
|
Fault translateDataWriteReq(MemReqPtr &req)
|
|
{
|
|
return dtb->translate(req, true);
|
|
}
|
|
|
|
#else
|
|
Fault dummyTranslation(MemReqPtr &req)
|
|
{
|
|
#if 0
|
|
assert((req->vaddr >> 48 & 0xffff) == 0);
|
|
#endif
|
|
|
|
// put the asid in the upper 16 bits of the paddr
|
|
req->paddr = req->vaddr & ~((Addr)0xffff << sizeof(Addr) * 8 - 16);
|
|
req->paddr = req->paddr | (Addr)req->asid << sizeof(Addr) * 8 - 16;
|
|
return NoFault;
|
|
}
|
|
|
|
/** Translates instruction requestion in syscall emulation mode. */
|
|
Fault translateInstReq(MemReqPtr &req)
|
|
{
|
|
return dummyTranslation(req);
|
|
}
|
|
|
|
/** Translates data read request in syscall emulation mode. */
|
|
Fault translateDataReadReq(MemReqPtr &req)
|
|
{
|
|
return dummyTranslation(req);
|
|
}
|
|
|
|
/** Translates data write request in syscall emulation mode. */
|
|
Fault translateDataWriteReq(MemReqPtr &req)
|
|
{
|
|
return dummyTranslation(req);
|
|
}
|
|
|
|
#endif
|
|
|
|
// Later on may want to remove this misc stuff from the regfile and
|
|
// have it handled at this level. This would be similar to moving certain
|
|
// IPRs into the devices themselves. Might prove to be an issue when
|
|
// trying to rename source/destination registers...
|
|
MiscReg readMiscReg(int misc_reg, unsigned tid);
|
|
|
|
MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault, unsigned tid);
|
|
|
|
Fault setMiscReg(int misc_reg, const MiscReg &val, unsigned tid);
|
|
|
|
Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val, unsigned tid);
|
|
|
|
void squashFromXC(unsigned tid);
|
|
|
|
#if FULL_SYSTEM
|
|
void post_interrupt(int int_num, int index);
|
|
|
|
int readIntrFlag();
|
|
/** Sets the interrupt flags. */
|
|
void setIntrFlag(int val);
|
|
/** HW return from error interrupt. */
|
|
Fault hwrei(unsigned tid);
|
|
/** Returns if a specific PC is a PAL mode PC. */
|
|
bool inPalMode(uint64_t PC)
|
|
{ return AlphaISA::PcPAL(PC); }
|
|
|
|
/** Traps to handle given fault. */
|
|
void trap(Fault fault, unsigned tid);
|
|
bool simPalCheck(int palFunc);
|
|
|
|
/** Processes any interrupts. */
|
|
void processInterrupts();
|
|
#endif
|
|
|
|
|
|
#if !FULL_SYSTEM
|
|
// Need to change these into regfile calls that directly set a certain
|
|
// register. Actually, these functions should handle most of this
|
|
// functionality by themselves; should look up the rename and then
|
|
// set the register.
|
|
/** Gets a syscall argument. */
|
|
IntReg getSyscallArg(int i, int tid);
|
|
|
|
/** Used to shift args for indirect syscall. */
|
|
void setSyscallArg(int i, IntReg val, int tid);
|
|
|
|
/** Sets the return value of a syscall. */
|
|
void setSyscallReturn(SyscallReturn return_value, int tid);
|
|
|
|
/** Executes a syscall.
|
|
* @todo: Determine if this needs to be virtual.
|
|
*/
|
|
virtual void syscall(int thread_num);
|
|
|
|
#endif
|
|
|
|
public:
|
|
#if FULL_SYSTEM
|
|
/** Halts the CPU. */
|
|
void halt() { panic("Halt not implemented!\n"); }
|
|
#endif
|
|
|
|
/** Old CPU read from memory function. No longer used. */
|
|
template <class T>
|
|
Fault read(MemReqPtr &req, T &data)
|
|
{
|
|
// panic("CPU READ NOT IMPLEMENTED W/NEW MEMORY\n");
|
|
#if 0
|
|
#if FULL_SYSTEM && defined(TARGET_ALPHA)
|
|
if (req->flags & LOCKED) {
|
|
req->xc->setMiscReg(TheISA::Lock_Addr_DepTag, req->paddr);
|
|
req->xc->setMiscReg(TheISA::Lock_Flag_DepTag, true);
|
|
}
|
|
#endif
|
|
#endif
|
|
Fault error;
|
|
if (req->flags & LOCKED) {
|
|
lockAddr = req->paddr;
|
|
lockFlag = true;
|
|
}
|
|
|
|
error = this->mem->read(req, data);
|
|
data = gtoh(data);
|
|
return error;
|
|
}
|
|
|
|
/** CPU read function, forwards read to LSQ. */
|
|
template <class T>
|
|
Fault read(MemReqPtr &req, T &data, int load_idx)
|
|
{
|
|
return this->iew.ldstQueue.read(req, data, load_idx);
|
|
}
|
|
|
|
/** Old CPU write to memory function. No longer used. */
|
|
template <class T>
|
|
Fault write(MemReqPtr &req, T &data)
|
|
{
|
|
#if 0
|
|
#if FULL_SYSTEM && defined(TARGET_ALPHA)
|
|
ExecContext *xc;
|
|
|
|
// If this is a store conditional, act appropriately
|
|
if (req->flags & LOCKED) {
|
|
xc = req->xc;
|
|
|
|
if (req->flags & UNCACHEABLE) {
|
|
// Don't update result register (see stq_c in isa_desc)
|
|
req->result = 2;
|
|
xc->setStCondFailures(0);//Needed? [RGD]
|
|
} else {
|
|
bool lock_flag = xc->readMiscReg(TheISA::Lock_Flag_DepTag);
|
|
Addr lock_addr = xc->readMiscReg(TheISA::Lock_Addr_DepTag);
|
|
req->result = lock_flag;
|
|
if (!lock_flag ||
|
|
((lock_addr & ~0xf) != (req->paddr & ~0xf))) {
|
|
xc->setMiscReg(TheISA::Lock_Flag_DepTag, false);
|
|
xc->setStCondFailures(xc->readStCondFailures() + 1);
|
|
if (((xc->readStCondFailures()) % 100000) == 0) {
|
|
std::cerr << "Warning: "
|
|
<< xc->readStCondFailures()
|
|
<< " consecutive store conditional failures "
|
|
<< "on cpu " << req->xc->readCpuId()
|
|
<< std::endl;
|
|
}
|
|
return NoFault;
|
|
}
|
|
else xc->setStCondFailures(0);
|
|
}
|
|
}
|
|
|
|
// Need to clear any locked flags on other proccessors for
|
|
// this address. Only do this for succsful Store Conditionals
|
|
// and all other stores (WH64?). Unsuccessful Store
|
|
// Conditionals would have returned above, and wouldn't fall
|
|
// through.
|
|
for (int i = 0; i < this->system->execContexts.size(); i++){
|
|
xc = this->system->execContexts[i];
|
|
if ((xc->readMiscReg(TheISA::Lock_Addr_DepTag) & ~0xf) ==
|
|
(req->paddr & ~0xf)) {
|
|
xc->setMiscReg(TheISA::Lock_Flag_DepTag, false);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
#endif
|
|
|
|
if (req->flags & LOCKED) {
|
|
if (req->flags & UNCACHEABLE) {
|
|
req->result = 2;
|
|
} else {
|
|
if (this->lockFlag/* && this->lockAddr == req->paddr*/) {
|
|
req->result = 1;
|
|
} else {
|
|
req->result = 0;
|
|
return NoFault;
|
|
}
|
|
}
|
|
}
|
|
|
|
return this->mem->write(req, (T)htog(data));
|
|
}
|
|
|
|
/** CPU write function, forwards write to LSQ. */
|
|
template <class T>
|
|
Fault write(MemReqPtr &req, T &data, int store_idx)
|
|
{
|
|
return this->iew.ldstQueue.write(req, data, store_idx);
|
|
}
|
|
|
|
Addr lockAddr;
|
|
bool lockFlag;
|
|
};
|
|
|
|
#endif // __CPU_O3_ALPHA_FULL_CPU_HH__
|