diff options
Diffstat (limited to 'src/arch/alpha/isa_traits.hh')
| -rw-r--r-- | src/arch/alpha/isa_traits.hh | 438 |
1 files changed, 248 insertions, 190 deletions
diff --git a/src/arch/alpha/isa_traits.hh b/src/arch/alpha/isa_traits.hh index 4f439b8df..c59d93238 100644 --- a/src/arch/alpha/isa_traits.hh +++ b/src/arch/alpha/isa_traits.hh @@ -42,7 +42,55 @@ class StaticInstPtr; namespace AlphaISA { - using namespace LittleEndianGuest; + + typedef uint32_t MachInst; + typedef uint64_t ExtMachInst; + typedef uint8_t RegIndex; + + const int NumIntArchRegs = 32; + const int NumPALShadowRegs = 8; + const int NumFloatArchRegs = 32; + // @todo: Figure out what this number really should be. + const int NumMiscArchRegs = 32; + + // Static instruction parameters + const int MaxInstSrcRegs = 3; + const int MaxInstDestRegs = 2; + + // semantically meaningful register indices + const int ZeroReg = 31; // architecturally meaningful + // the rest of these depend on the ABI + const int StackPointerReg = 30; + const int GlobalPointerReg = 29; + const int ProcedureValueReg = 27; + const int ReturnAddressReg = 26; + const int ReturnValueReg = 0; + const int FramePointerReg = 15; + const int ArgumentReg0 = 16; + const int ArgumentReg1 = 17; + const int ArgumentReg2 = 18; + const int ArgumentReg3 = 19; + const int ArgumentReg4 = 20; + const int ArgumentReg5 = 21; + const int SyscallNumReg = ReturnValueReg; + const int SyscallPseudoReturnReg = ArgumentReg4; + const int SyscallSuccessReg = 19; + + + + const int LogVMPageSize = 13; // 8K bytes + const int VMPageSize = (1 << LogVMPageSize); + + const int BranchPredAddrShiftAmt = 2; // instructions are 4-byte aligned + + const int WordBytes = 4; + const int HalfwordBytes = 2; + const int ByteBytes = 1; + + + const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs; + const int NumFloatRegs = NumFloatArchRegs; + const int NumMiscRegs = NumMiscArchRegs; // These enumerate all the registers for dependence tracking. enum DependenceTags { @@ -57,231 +105,241 @@ namespace AlphaISA IPR_Base_DepTag = 76 }; - StaticInstPtr decodeInst(ExtMachInst); + typedef uint64_t IntReg; + typedef IntReg IntRegFile[NumIntRegs]; - // Alpha Does NOT have a delay slot - #define ISA_HAS_DELAY_SLOT 0 + // floating point register file entry type + typedef union { + uint64_t q; + double d; + } FloatReg; - const Addr PageShift = 13; - const Addr PageBytes = ULL(1) << PageShift; - const Addr PageMask = ~(PageBytes - 1); - const Addr PageOffset = PageBytes - 1; + typedef union { + uint64_t q[NumFloatRegs]; // integer qword view + double d[NumFloatRegs]; // double-precision floating point view -#if FULL_SYSTEM + void clear() + { bzero(d, sizeof(d)); } + } FloatRegFile; - //////////////////////////////////////////////////////////////////////// - // - // Translation stuff - // +extern const Addr PageShift; +extern const Addr PageBytes; +extern const Addr PageMask; +extern const Addr PageOffset; - const Addr PteShift = 3; - const Addr NPtePageShift = PageShift - PteShift; - const Addr NPtePage = ULL(1) << NPtePageShift; - const Addr PteMask = NPtePage - 1; +// redirected register map, really only used for the full system case. +extern const int reg_redir[NumIntRegs]; - // User Virtual - const Addr USegBase = ULL(0x0); - const Addr USegEnd = ULL(0x000003ffffffffff); +#if FULL_SYSTEM - // Kernel Direct Mapped - const Addr K0SegBase = ULL(0xfffffc0000000000); - const Addr K0SegEnd = ULL(0xfffffdffffffffff); + typedef uint64_t InternalProcReg; - // Kernel Virtual - const Addr K1SegBase = ULL(0xfffffe0000000000); - const Addr K1SegEnd = ULL(0xffffffffffffffff); +#include "arch/alpha/isa_fullsys_traits.hh" - // For loading... XXX This maybe could be USegEnd?? --ali - const Addr LoadAddrMask = ULL(0xffffffffff); +#else + const int NumInternalProcRegs = 0; +#endif - //////////////////////////////////////////////////////////////////////// - // - // Interrupt levels - // - enum InterruptLevels - { - INTLEVEL_SOFTWARE_MIN = 4, - INTLEVEL_SOFTWARE_MAX = 19, + // control register file contents + typedef uint64_t MiscReg; + class MiscRegFile { + protected: + 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 - INTLEVEL_EXTERNAL_MIN = 20, - INTLEVEL_EXTERNAL_MAX = 34, + public: + MiscReg readReg(int misc_reg); - INTLEVEL_IRQ0 = 20, - INTLEVEL_IRQ1 = 21, - INTINDEX_ETHERNET = 0, - INTINDEX_SCSI = 1, - INTLEVEL_IRQ2 = 22, - INTLEVEL_IRQ3 = 23, + //These functions should be removed once the simplescalar cpu model + //has been replaced. + int getInstAsid(); + int getDataAsid(); - INTLEVEL_SERIAL = 33, + MiscReg readRegWithEffect(int misc_reg, Fault &fault, ExecContext *xc); - NumInterruptLevels = INTLEVEL_EXTERNAL_MAX - }; + Fault setReg(int misc_reg, const MiscReg &val); + Fault setRegWithEffect(int misc_reg, const MiscReg &val, + ExecContext *xc); - // EV5 modes - enum mode_type - { - mode_kernel = 0, // kernel - mode_executive = 1, // executive (unused by unix) - mode_supervisor = 2, // supervisor (unused by unix) - mode_user = 3, // user mode - mode_number // number of modes - }; + void serialize(std::ostream &os); -#endif + void unserialize(Checkpoint *cp, const std::string §ion); + + void clear() + { + fpcr = uniq = 0; + lock_flag = 0; + lock_addr = 0; + } #if FULL_SYSTEM - //////////////////////////////////////////////////////////////////////// - // - // Internal Processor Reigsters - // - enum md_ipr_names - { - IPR_ISR = 0x100, // interrupt summary register - IPR_ITB_TAG = 0x101, // ITLB tag register - IPR_ITB_PTE = 0x102, // ITLB page table entry register - IPR_ITB_ASN = 0x103, // ITLB address space register - IPR_ITB_PTE_TEMP = 0x104, // ITLB page table entry temp register - IPR_ITB_IA = 0x105, // ITLB invalidate all register - IPR_ITB_IAP = 0x106, // ITLB invalidate all process register - IPR_ITB_IS = 0x107, // ITLB invalidate select register - IPR_SIRR = 0x108, // software interrupt request register - IPR_ASTRR = 0x109, // asynchronous system trap request register - IPR_ASTER = 0x10a, // asynchronous system trap enable register - IPR_EXC_ADDR = 0x10b, // exception address register - IPR_EXC_SUM = 0x10c, // exception summary register - IPR_EXC_MASK = 0x10d, // exception mask register - IPR_PAL_BASE = 0x10e, // PAL base address register - IPR_ICM = 0x10f, // instruction current mode - IPR_IPLR = 0x110, // interrupt priority level register - IPR_INTID = 0x111, // interrupt ID register - IPR_IFAULT_VA_FORM = 0x112, // formatted faulting virtual addr register - IPR_IVPTBR = 0x113, // virtual page table base register - IPR_HWINT_CLR = 0x115, // H/W interrupt clear register - IPR_SL_XMIT = 0x116, // serial line transmit register - IPR_SL_RCV = 0x117, // serial line receive register - IPR_ICSR = 0x118, // instruction control and status register - IPR_IC_FLUSH = 0x119, // instruction cache flush control - IPR_IC_PERR_STAT = 0x11a, // inst cache parity error status register - IPR_PMCTR = 0x11c, // performance counter register - - // PAL temporary registers... - // register meanings gleaned from osfpal.s source code - IPR_PALtemp0 = 0x140, // local scratch - IPR_PALtemp1 = 0x141, // local scratch - IPR_PALtemp2 = 0x142, // entUna - IPR_PALtemp3 = 0x143, // CPU specific impure area pointer - IPR_PALtemp4 = 0x144, // memory management temp - IPR_PALtemp5 = 0x145, // memory management temp - IPR_PALtemp6 = 0x146, // memory management temp - IPR_PALtemp7 = 0x147, // entIF - IPR_PALtemp8 = 0x148, // intmask - IPR_PALtemp9 = 0x149, // entSys - IPR_PALtemp10 = 0x14a, // ?? - IPR_PALtemp11 = 0x14b, // entInt - IPR_PALtemp12 = 0x14c, // entArith - IPR_PALtemp13 = 0x14d, // reserved for platform specific PAL - IPR_PALtemp14 = 0x14e, // reserved for platform specific PAL - IPR_PALtemp15 = 0x14f, // reserved for platform specific PAL - IPR_PALtemp16 = 0x150, // scratch / whami<7:0> / mces<4:0> - IPR_PALtemp17 = 0x151, // sysval - IPR_PALtemp18 = 0x152, // usp - IPR_PALtemp19 = 0x153, // ksp - IPR_PALtemp20 = 0x154, // PTBR - IPR_PALtemp21 = 0x155, // entMM - IPR_PALtemp22 = 0x156, // kgp - IPR_PALtemp23 = 0x157, // PCBB - - IPR_DTB_ASN = 0x200, // DTLB address space number register - IPR_DTB_CM = 0x201, // DTLB current mode register - IPR_DTB_TAG = 0x202, // DTLB tag register - IPR_DTB_PTE = 0x203, // DTLB page table entry register - IPR_DTB_PTE_TEMP = 0x204, // DTLB page table entry temporary register - - IPR_MM_STAT = 0x205, // data MMU fault status register - IPR_VA = 0x206, // fault virtual address register - IPR_VA_FORM = 0x207, // formatted virtual address register - IPR_MVPTBR = 0x208, // MTU virtual page table base register - IPR_DTB_IAP = 0x209, // DTLB invalidate all process register - IPR_DTB_IA = 0x20a, // DTLB invalidate all register - IPR_DTB_IS = 0x20b, // DTLB invalidate single register - IPR_ALT_MODE = 0x20c, // alternate mode register - IPR_CC = 0x20d, // cycle counter register - IPR_CC_CTL = 0x20e, // cycle counter control register - IPR_MCSR = 0x20f, // MTU control register - - IPR_DC_FLUSH = 0x210, - IPR_DC_PERR_STAT = 0x212, // Dcache parity error status register - IPR_DC_TEST_CTL = 0x213, // Dcache test tag control register - IPR_DC_TEST_TAG = 0x214, // Dcache test tag register - IPR_DC_TEST_TAG_TEMP = 0x215, // Dcache test tag temporary register - IPR_DC_MODE = 0x216, // Dcache mode register - IPR_MAF_MODE = 0x217, // miss address file mode register - - NumInternalProcRegs // number of IPR registers - }; -#else - const int NumInternalProcRegs = 0; -#endif + protected: + InternalProcReg ipr[NumInternalProcRegs]; // Internal processor regs - // Constants Related to the number of registers + private: + MiscReg readIpr(int idx, Fault &fault, ExecContext *xc); - const int NumIntArchRegs = 32; - const int NumPALShadowRegs = 8; - const int NumFloatArchRegs = 32; - // @todo: Figure out what this number really should be. - const int NumMiscArchRegs = 32; + Fault setIpr(int idx, uint64_t val, ExecContext *xc); - const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs; - const int NumFloatRegs = NumFloatArchRegs; - const int NumMiscRegs = NumMiscArchRegs; + void copyIprs(ExecContext *xc); +#endif + friend class RegFile; + }; const int TotalNumRegs = NumIntRegs + NumFloatRegs + NumMiscRegs + NumInternalProcRegs; const int TotalDataRegs = NumIntRegs + NumFloatRegs; - // Static instruction parameters - const int MaxInstSrcRegs = 3; - const int MaxInstDestRegs = 2; + typedef union { + IntReg intreg; + FloatReg fpreg; + MiscReg ctrlreg; + } AnyReg; - // semantically meaningful register indices - const int ZeroReg = 31; // architecturally meaningful - // the rest of these depend on the ABI - const int StackPointerReg = 30; - const int GlobalPointerReg = 29; - const int ProcedureValueReg = 27; - const int ReturnAddressReg = 26; - const int ReturnValueReg = 0; - const int FramePointerReg = 15; - const int ArgumentReg0 = 16; - const int ArgumentReg1 = 17; - const int ArgumentReg2 = 18; - const int ArgumentReg3 = 19; - const int ArgumentReg4 = 20; - const int ArgumentReg5 = 21; - const int SyscallNumReg = ReturnValueReg; - const int SyscallPseudoReturnReg = ArgumentReg4; - const int SyscallSuccessReg = 19; + 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 + Addr nnpc; - const int LogVMPageSize = 13; // 8K bytes - const int VMPageSize = (1 << LogVMPageSize); +#if FULL_SYSTEM + int intrflag; // interrupt flag + inline int instAsid() + { return EV5::ITB_ASN_ASN(miscRegs.ipr[IPR_ITB_ASN]); } + inline int dataAsid() + { return EV5::DTB_ASN_ASN(miscRegs.ipr[IPR_DTB_ASN]); } +#endif // FULL_SYSTEM + + void serialize(std::ostream &os); + void unserialize(Checkpoint *cp, const std::string §ion); + + void clear() + { + bzero(intRegFile, sizeof(intRegFile)); + floatRegFile.clear(); + miscRegs.clear(); + } + }; - const int BranchPredAddrShiftAmt = 2; // instructions are 4-byte aligned + static inline ExtMachInst makeExtMI(MachInst inst, const uint64_t &pc); - const int MachineBytes = 8; - const int WordBytes = 4; - const int HalfwordBytes = 2; - const int ByteBytes = 1; + StaticInstPtr decodeInst(ExtMachInst); + + // Alpha Does NOT have a delay slot + #define ISA_HAS_DELAY_SLOT 0 // return a no-op instruction... used for instruction fetch faults - // Alpha UNOP (ldq_u r31,0(r0)) - const ExtMachInst NoopMachInst = 0x2ffe0000; + extern const ExtMachInst NoopMachInst; + + 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 + + void saveMachineReg(AnyReg &savereg, const RegFile ®_file, + int regnum); + + 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> + void zeroRegisters(XC *xc); - // redirected register map, really only used for the full system case. - extern const int reg_redir[NumIntRegs]; + const Addr MaxAddr = (Addr)-1; +#if !FULL_SYSTEM + static inline void setSyscallReturn(SyscallReturn return_value, RegFile *regs) + { + // check for error condition. Alpha syscall convention is to + // indicate success/failure in reg a3 (r19) and put the + // return value itself in the standard return value reg (v0). + if (return_value.successful()) { + // no error + regs->intRegFile[SyscallSuccessReg] = 0; + regs->intRegFile[ReturnValueReg] = return_value.value(); + } else { + // got an error, return details + regs->intRegFile[SyscallSuccessReg] = (IntReg) -1; + regs->intRegFile[ReturnValueReg] = -return_value.value(); + } + } +#endif + + void copyRegs(ExecContext *src, ExecContext *dest); + + void copyMiscRegs(ExecContext *src, ExecContext *dest); + +#if FULL_SYSTEM + void copyIprs(ExecContext *src, ExecContext *dest); +#endif }; #endif // __ARCH_ALPHA_ISA_TRAITS_HH__ |