diff options
Diffstat (limited to 'src/cpu/o3/alpha_cpu.hh')
-rw-r--r-- | src/cpu/o3/alpha_cpu.hh | 331 |
1 files changed, 235 insertions, 96 deletions
diff --git a/src/cpu/o3/alpha_cpu.hh b/src/cpu/o3/alpha_cpu.hh index 8e1e0f42a..1bab0703e 100644 --- a/src/cpu/o3/alpha_cpu.hh +++ b/src/cpu/o3/alpha_cpu.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004-2005 The Regents of The University of Michigan + * Copyright (c) 2004-2006 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -26,16 +26,19 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -// Todo: Find all the stuff in ExecContext and ev5 that needs to be -// specifically designed for this CPU. +#ifndef __CPU_O3_ALPHA_FULL_CPU_HH__ +#define __CPU_O3_ALPHA_FULL_CPU_HH__ -#ifndef __CPU_O3_CPU_ALPHA_FULL_CPU_HH__ -#define __CPU_O3_CPU_ALPHA_FULL_CPU_HH__ - -#include "cpu/o3/cpu.hh" #include "arch/isa_traits.hh" +#include "cpu/exec_context.hh" +#include "cpu/o3/cpu.hh" #include "sim/byteswap.hh" +class EndQuiesceEvent; +namespace Kernel { + class Statistics; +}; + template <class Impl> class AlphaFullCPU : public FullO3CPU<Impl> { @@ -46,37 +49,180 @@ class AlphaFullCPU : public FullO3CPU<Impl> typedef TheISA::MiscRegFile MiscRegFile; public: + typedef O3ThreadState<Impl> ImplState; + typedef O3ThreadState<Impl> Thread; typedef typename Impl::Params Params; - public: - AlphaFullCPU(Params ¶ms); + /** Constructs an AlphaFullCPU with the given parameters. */ + AlphaFullCPU(Params *params); + + class AlphaXC : public ExecContext + { + public: + AlphaFullCPU<Impl> *cpu; + + O3ThreadState<Impl> *thread; + + 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; } + + virtual Kernel::Statistics *getKernelStats() + { return thread->kernelStats; } +#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 EndQuiesceEvent *getQuiesceEvent(); + + virtual Tick readLastActivate(); + virtual Tick readLastSuspend(); + + virtual void profileClear(); + virtual void profileSample(); +#endif + + virtual int getThreadNum() { return thread->tid; } + + virtual TheISA::MachInst getInst(); + + virtual void copyArchRegs(ExecContext *xc); + + virtual void clearArchRegs(); + + 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); + + // @todo: Figure out where these store cond failures should go. + 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. Lots of code + // outside the CPU still checks this function, so it will + // always return false to keep everything working. + virtual bool misspeculating() { return false; } + +#if !FULL_SYSTEM + virtual IntReg getSyscallArg(int i); + + virtual void setSyscallArg(int i, IntReg val); + + virtual void setSyscallReturn(SyscallReturn return_value); + + virtual void syscall() { return cpu->syscall(thread->tid); } + + virtual Counter readFuncExeInst() { return thread->funcExeInst; } +#endif + }; #if FULL_SYSTEM + /** ITB pointer. */ AlphaITB *itb; + /** DTB pointer. */ AlphaDTB *dtb; #endif - public: + /** 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); @@ -95,141 +241,113 @@ class AlphaFullCPU : public FullO3CPU<Impl> 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 + MiscReg readMiscReg(int misc_reg, unsigned tid); - // Later on may want to remove this misc stuff from the regfile and - // have it handled at this level. Might prove to be an issue when - // trying to rename source/destination registers... - MiscReg readMiscReg(int misc_reg) - { - // Dummy function for now. - // @todo: Fix this once reg file gets fixed. - return 0; - } + MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault, unsigned tid); - Fault setMiscReg(int misc_reg, const MiscReg &val) - { - // Dummy function for now. - // @todo: Fix this once reg file gets fixed. - return NoFault; - } + Fault setMiscReg(int misc_reg, const MiscReg &val, unsigned tid); + + Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val, unsigned tid); + + void squashFromXC(unsigned tid); - // Most of the full system code and syscall emulation is not yet - // implemented. These functions do show what the final interface will - // look like. #if FULL_SYSTEM + void post_interrupt(int int_num, int index); + int readIntrFlag(); + /** Sets the interrupt flags. */ void setIntrFlag(int val); - Fault hwrei(); - bool inPalMode() { return AlphaISA::PcPAL(this->regFile.readPC()); } + /** 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); } - void trap(Fault fault); - bool simPalCheck(int palFunc); + /** Traps to handle given fault. */ + void trap(Fault fault, unsigned tid); + bool simPalCheck(int palFunc, unsigned tid); + /** 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. - IntReg getSyscallArg(int i) - { - return this->cpuXC->readIntReg(AlphaISA::ArgumentReg0 + i); - } - - // used to shift args for indirect syscall - void setSyscallArg(int i, IntReg val) - { - this->cpuXC->setIntReg(AlphaISA::ArgumentReg0 + i, val); - } - - void setSyscallReturn(int64_t return_value) - { - // 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). - const int RegA3 = 19; // only place this is used - if (return_value >= 0) { - // no error - this->cpuXC->setIntReg(RegA3, 0); - this->cpuXC->setIntReg(AlphaISA::ReturnValueReg, return_value); - } else { - // got an error, return details - this->cpuXC->setIntReg(RegA3, (IntReg) -1); - this->cpuXC->setIntReg(AlphaISA::ReturnValueReg, -return_value); - } - } - - void syscall(short thread_num); - void squashStages(); + /** Halts the CPU. */ + void halt() { panic("Halt not implemented!\n"); } #endif - void copyToXC(); - void copyFromXC(); - - public: -#if FULL_SYSTEM - bool palShadowEnabled; - - // Not sure this is used anywhere. - void intr_post(RegFile *regs, Fault fault, Addr pc); - // Actually used within exec files. Implement properly. - void swapPALShadow(bool use_shadow); - // Called by CPU constructor. Can implement as I please. - void initCPU(RegFile *regs); - // Called by initCPU. Implement as I please. - void initIPRs(RegFile *regs); - void halt() { panic("Halt not implemented!\n"); } +#if !FULL_SYSTEM + /** Executes a syscall. + * @todo: Determine if this needs to be virtual. + */ + void syscall(int thread_num); + /** 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); #endif - + /** Read from memory function. */ template <class T> Fault read(MemReqPtr &req, T &data) { +#if 0 #if FULL_SYSTEM && THE_ISA == ALPHA_ISA 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 FULL_SYSTEM + // @todo: Fix this LL/SC hack. + if (req->flags & LOCKED) { + lockAddr = req->paddr; + lockFlag = true; + } +#endif + 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); } + /** Write to memory function. */ template <class T> Fault write(MemReqPtr &req, T &data) { +#if 0 #if FULL_SYSTEM && THE_ISA == ALPHA_ISA ExecContext *xc; @@ -276,16 +394,37 @@ class AlphaFullCPU : public FullO3CPU<Impl> } #endif +#endif + +#if FULL_SYSTEM + // @todo: Fix this LL/SC hack. + if (req->flags & LOCKED) { + if (req->flags & UNCACHEABLE) { + req->result = 2; + } else { + if (this->lockFlag) { + req->result = 1; + } else { + req->result = 0; + return NoFault; + } + } + } +#endif 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_CPU_ALPHA_FULL_CPU_HH__ +#endif // __CPU_O3_ALPHA_FULL_CPU_HH__ |