Mostly a matter of keeping prefetches to invalid addrs from messing up VM IPRs. Also discovered that wh64s were not being treated as prefetches, when they really should be (for the most part, anyway). arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: - Get rid of intrlock flag for locking VM fault regs (a la EV5); instead, just don't update regs on VPTE loads (a la EV6). - Add NO_FAULT MemReq flag to indicate references that should not cause page faults (i.e., prefetches). arch/alpha/ev5.cc: - Get rid of intrlock flag for locking VM fault regs (a la EV5); instead, just don't update regs on VPTE loads (a la EV6). - Add Fault trace flag. arch/alpha/isa_desc: - Add NO_FAULT MemReq flag to indicate references that should not cause page faults (i.e., prefetches). - Mark wh64 as a "data prefetch" instruction so it gets controlled properly by the FullCPU data prefetch control switch. - Align wh64 EA in decoder so issue stage doesn't need to worry about it. arch/alpha/isa_traits.hh: - Get rid of intrlock flag for locking VM fault regs (a la EV5); instead, just don't update regs on VPTE loads (a la EV6). base/traceflags.py: - Add Fault trace flag. cpu/simple_cpu/simple_cpu.hh: - Pass MemReq flags to writeHint() operation. cpu/static_inst.hh: Update comment re: prefetches. --HG-- extra : convert_revision : 62e466b0f4c0ff9961796270fa2e371ec24bcbb6
285 lines
8.8 KiB
C++
285 lines
8.8 KiB
C++
/*
|
|
* Copyright (c) 2003 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 __ISA_TRAITS_HH__
|
|
#define __ISA_TRAITS_HH__
|
|
|
|
#include "sim/host.hh"
|
|
#include "targetarch/faults.hh"
|
|
#include "base/misc.hh"
|
|
|
|
class FastCPU;
|
|
class FullCPU;
|
|
class Checkpoint;
|
|
|
|
#define TARGET_ALPHA
|
|
|
|
template <class ISA> class StaticInst;
|
|
template <class ISA> class StaticInstPtr;
|
|
|
|
class AlphaISA
|
|
{
|
|
public:
|
|
|
|
typedef uint32_t MachInst;
|
|
typedef uint64_t Addr;
|
|
typedef uint8_t RegIndex;
|
|
|
|
enum {
|
|
MemoryEnd = 0xffffffffffffffffULL,
|
|
|
|
NumIntRegs = 32,
|
|
NumFloatRegs = 32,
|
|
NumMiscRegs = 32,
|
|
|
|
MaxRegsOfAnyType = 32,
|
|
// Static instruction parameters
|
|
MaxInstSrcRegs = 3,
|
|
MaxInstDestRegs = 2,
|
|
|
|
// semantically meaningful register indices
|
|
ZeroReg = 31, // architecturally meaningful
|
|
// the rest of these depend on the ABI
|
|
StackPointerReg = 30,
|
|
GlobalPointerReg = 29,
|
|
ReturnAddressReg = 26,
|
|
ReturnValueReg = 0,
|
|
ArgumentReg0 = 16,
|
|
ArgumentReg1 = 17,
|
|
ArgumentReg2 = 18,
|
|
ArgumentReg3 = 19,
|
|
ArgumentReg4 = 20,
|
|
ArgumentReg5 = 21,
|
|
|
|
LogVMPageSize = 13, // 8K bytes
|
|
VMPageSize = (1 << LogVMPageSize),
|
|
|
|
BranchPredAddrShiftAmt = 2, // instructions are 4-byte aligned
|
|
|
|
WordBytes = 4,
|
|
HalfwordBytes = 2,
|
|
ByteBytes = 1,
|
|
DepNA = 0,
|
|
};
|
|
|
|
// These enumerate all the registers for dependence tracking.
|
|
enum DependenceTags {
|
|
// 0..31 are the integer regs 0..31
|
|
// 32..63 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
|
|
FP_Base_DepTag = 32,
|
|
Ctrl_Base_DepTag = 64,
|
|
Fpcr_DepTag = 64, // floating point control register
|
|
Uniq_DepTag = 65,
|
|
IPR_Base_DepTag = 66
|
|
};
|
|
|
|
typedef uint64_t IntReg;
|
|
typedef IntReg IntRegFile[NumIntRegs];
|
|
|
|
// floating point register file entry type
|
|
typedef union {
|
|
uint64_t q;
|
|
double d;
|
|
} FloatReg;
|
|
|
|
typedef union {
|
|
uint64_t q[NumFloatRegs]; // integer qword view
|
|
double d[NumFloatRegs]; // double-precision floating point view
|
|
} FloatRegFile;
|
|
|
|
// control register file contents
|
|
typedef uint64_t MiscReg;
|
|
typedef struct {
|
|
uint64_t fpcr; // floating point condition codes
|
|
uint64_t uniq; // process-unique register
|
|
bool lock_flag; // lock flag for LL/SC
|
|
Addr lock_addr; // lock address for LL/SC
|
|
} MiscRegFile;
|
|
|
|
#ifdef FULL_SYSTEM
|
|
|
|
typedef uint64_t InternalProcReg;
|
|
|
|
#include "targetarch/isa_fullsys_traits.hh"
|
|
|
|
#else
|
|
enum {
|
|
NumInternalProcRegs = 0
|
|
};
|
|
#endif
|
|
|
|
enum {
|
|
TotalNumRegs =
|
|
NumIntRegs + NumFloatRegs + NumMiscRegs + NumInternalProcRegs
|
|
};
|
|
|
|
typedef union {
|
|
IntReg intreg;
|
|
FloatReg fpreg;
|
|
MiscReg ctrlreg;
|
|
} AnyReg;
|
|
|
|
struct RegFile {
|
|
IntRegFile intRegFile; // (signed) integer register file
|
|
FloatRegFile floatRegFile; // floating point register file
|
|
MiscRegFile miscRegs; // control register file
|
|
Addr pc; // program counter
|
|
Addr npc; // next-cycle program counter
|
|
#ifdef FULL_SYSTEM
|
|
IntReg palregs[NumIntRegs]; // PAL shadow registers
|
|
InternalProcReg ipr[NumInternalProcRegs]; // internal processor regs
|
|
int intrflag; // interrupt flag
|
|
bool pal_shadow; // using pal_shadow registers
|
|
#endif // FULL_SYSTEM
|
|
|
|
void serialize(std::ostream &os);
|
|
void unserialize(Checkpoint *cp, const std::string §ion);
|
|
};
|
|
|
|
static StaticInstPtr<AlphaISA> decodeInst(MachInst);
|
|
|
|
enum annotes {
|
|
ANNOTE_NONE = 0,
|
|
// An impossible number for instruction annotations
|
|
ITOUCH_ANNOTE = 0xffffffff,
|
|
};
|
|
|
|
static inline bool isCallerSaveIntegerRegister(unsigned int reg) {
|
|
panic("register classification not implemented");
|
|
return (reg >= 1 && reg <= 8 || reg >= 22 && reg <= 25 || reg == 27);
|
|
}
|
|
|
|
static inline bool isCalleeSaveIntegerRegister(unsigned int reg) {
|
|
panic("register classification not implemented");
|
|
return (reg >= 9 && reg <= 15);
|
|
}
|
|
|
|
static inline bool isCallerSaveFloatRegister(unsigned int reg) {
|
|
panic("register classification not implemented");
|
|
return false;
|
|
}
|
|
|
|
static inline bool isCalleeSaveFloatRegister(unsigned int reg) {
|
|
panic("register classification not implemented");
|
|
return false;
|
|
}
|
|
|
|
static inline Addr alignAddress(const Addr &addr,
|
|
unsigned int nbytes) {
|
|
return (addr & ~(nbytes - 1));
|
|
}
|
|
|
|
// Instruction address compression hooks
|
|
static inline Addr realPCToFetchPC(const Addr &addr) {
|
|
return addr;
|
|
}
|
|
|
|
static inline Addr fetchPCToRealPC(const Addr &addr) {
|
|
return addr;
|
|
}
|
|
|
|
// the size of "fetched" instructions (not necessarily the size
|
|
// of real instructions for PISA)
|
|
static inline size_t fetchInstSize() {
|
|
return sizeof(MachInst);
|
|
}
|
|
|
|
static inline MachInst makeRegisterCopy(int dest, int src) {
|
|
panic("makeRegisterCopy not implemented");
|
|
return 0;
|
|
}
|
|
|
|
// Machine operations
|
|
|
|
static void saveMachineReg(AnyReg &savereg, const RegFile ®_file,
|
|
int regnum);
|
|
|
|
static void restoreMachineReg(RegFile ®s, const AnyReg ®,
|
|
int regnum);
|
|
|
|
#if 0
|
|
static void serializeSpecialRegs(const Serializable::Proxy &proxy,
|
|
const RegFile ®s);
|
|
|
|
static void unserializeSpecialRegs(const IniFile *db,
|
|
const std::string &category,
|
|
ConfigNode *node,
|
|
RegFile ®s);
|
|
#endif
|
|
|
|
/**
|
|
* Function to insure ISA semantics about 0 registers.
|
|
* @param xc The execution context.
|
|
*/
|
|
template <class XC>
|
|
static void zeroRegisters(XC *xc);
|
|
};
|
|
|
|
|
|
typedef AlphaISA TheISA;
|
|
|
|
typedef TheISA::MachInst MachInst;
|
|
typedef TheISA::Addr Addr;
|
|
typedef TheISA::RegIndex RegIndex;
|
|
typedef TheISA::IntReg IntReg;
|
|
typedef TheISA::IntRegFile IntRegFile;
|
|
typedef TheISA::FloatReg FloatReg;
|
|
typedef TheISA::FloatRegFile FloatRegFile;
|
|
typedef TheISA::MiscReg MiscReg;
|
|
typedef TheISA::MiscRegFile MiscRegFile;
|
|
typedef TheISA::AnyReg AnyReg;
|
|
typedef TheISA::RegFile RegFile;
|
|
|
|
const int NumIntRegs = TheISA::NumIntRegs;
|
|
const int NumFloatRegs = TheISA::NumFloatRegs;
|
|
const int NumMiscRegs = TheISA::NumMiscRegs;
|
|
const int TotalNumRegs = TheISA::TotalNumRegs;
|
|
const int VMPageSize = TheISA::VMPageSize;
|
|
const int LogVMPageSize = TheISA::LogVMPageSize;
|
|
const int ZeroReg = TheISA::ZeroReg;
|
|
const int StackPointerReg = TheISA::StackPointerReg;
|
|
const int GlobalPointerReg = TheISA::GlobalPointerReg;
|
|
const int ReturnAddressReg = TheISA::ReturnAddressReg;
|
|
const int ReturnValueReg = TheISA::ReturnValueReg;
|
|
const int ArgumentReg0 = TheISA::ArgumentReg0;
|
|
const int ArgumentReg1 = TheISA::ArgumentReg1;
|
|
const int BranchPredAddrShiftAmt = TheISA::BranchPredAddrShiftAmt;
|
|
const int MaxAddr = (Addr)-1;
|
|
|
|
#ifdef FULL_SYSTEM
|
|
typedef TheISA::InternalProcReg InternalProcReg;
|
|
const int NumInternalProcRegs = TheISA::NumInternalProcRegs;
|
|
const int NumInterruptLevels = TheISA::NumInterruptLevels;
|
|
|
|
// more stuff that should be imported here, but I'm too tired to do it
|
|
// right now...
|
|
#include "targetarch/ev5.hh"
|
|
#endif
|
|
|
|
#endif // __ALPHA_ISA_H__
|