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Diffstat (limited to 'src/arch/mips/misc_regfile.hh')
| -rw-r--r-- | src/arch/mips/misc_regfile.hh | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/arch/mips/misc_regfile.hh b/src/arch/mips/misc_regfile.hh new file mode 100644 index 000000000..ab233abde --- /dev/null +++ b/src/arch/mips/misc_regfile.hh @@ -0,0 +1,164 @@ +/* + * Copyright (c) 2006 The Regents of The University of Michigan + * Copyright (c) 2007 MIPS Technologies, Inc. + * 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. + * + * Authors: Korey Sewell + * Jaidev Patwardhan + */ + +#ifndef __ARCH_MIPS_REGFILE_MISC_REGFILE_HH__ +#define __ARCH_MIPS_REGFILE_MISC_REGFILE_HH__ + +#include "arch/mips/isa_traits.hh" +#include "arch/mips/types.hh" +#include "arch/mips/mt.hh" +#include "arch/mips/mt_constants.hh" +#include "base/bitfield.hh" +#include "sim/eventq.hh" +#include <queue> + +class Params; +class BaseCPU; + +namespace MipsISA +{ + class MiscRegFile { + public: + // The MIPS name for this file is CP0 or Coprocessor 0 + typedef MiscRegFile CP0; + + protected: + enum BankType { + perProcessor, + perThreadContext, + perVirtProcessor + }; + + std::vector<std::vector<MiscReg> > miscRegFile; + std::vector<std::vector<MiscReg> > miscRegFile_WriteMask; + std::vector<BankType> bankType; + + BaseCPU *cpu; + + public: + MiscRegFile(); + MiscRegFile(BaseCPU *_cpu); + + void init(); + + void clear(unsigned tid_or_vpn = 0); + + void reset(std::string core_name, ThreadID num_threads, + unsigned num_vpes, BaseCPU *_cpu); + + void expandForMultithreading(ThreadID num_threads, unsigned num_vpes); + + unsigned getVPENum(ThreadID tid); + + ////////////////////////////////////////////////////////// + // + // READ/WRITE CP0 STATE + // + // + ////////////////////////////////////////////////////////// + //@TODO: MIPS MT's register view automatically connects + // Status to TCStatus depending on current thread + void updateCP0ReadView(int misc_reg, ThreadID tid) { } + MiscReg readRegNoEffect(int misc_reg, ThreadID tid = 0); + + //template <class TC> + MiscReg readReg(int misc_reg, + ThreadContext *tc, ThreadID tid = 0); + + MiscReg filterCP0Write(int misc_reg, int reg_sel, const MiscReg &val); + void setRegMask(int misc_reg, const MiscReg &val, ThreadID tid = 0); + void setRegNoEffect(int misc_reg, const MiscReg &val, + ThreadID tid = 0); + + //template <class TC> + void setReg(int misc_reg, const MiscReg &val, + ThreadContext *tc, ThreadID tid = 0); + + int getInstAsid(); + int getDataAsid(); + + ////////////////////////////////////////////////////////// + // + // DECLARE INTERFACE THAT WILL ALLOW A MiscRegFile (Cop0) + // TO SCHEDULE EVENTS + // + ////////////////////////////////////////////////////////// + + // Flag that is set when CP0 state has been written to. + bool cp0Updated; + + // Enumerated List of CP0 Event Types + enum CP0EventType { + UpdateCP0 + }; + + // Declare A CP0Event Class for scheduling + class CP0Event : public Event + { + protected: + MiscRegFile::CP0 *cp0; + BaseCPU *cpu; + CP0EventType cp0EventType; + Fault fault; + + public: + /** Constructs a CP0 event. */ + CP0Event(CP0 *_cp0, BaseCPU *_cpu, CP0EventType e_type); + + /** Process this event. */ + virtual void process(); + + /** Returns the description of this event. */ + const char *description() const; + + /** Schedule This Event */ + void scheduleEvent(int delay); + + /** Unschedule This Event */ + void unscheduleEvent(); + }; + + // Schedule a CP0 Update Event + void scheduleCP0Update(int delay = 0); + + // If any changes have been made, then check the state for changes + // and if necessary alert the CPU + void updateCPU(); + + // Keep a List of CPU Events that need to be deallocated + std::queue<CP0Event*> cp0EventRemoveList; + + static std::string miscRegNames[NumMiscRegs]; + }; +} // namespace MipsISA + +#endif |