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/*
* Copyright (c) 2006 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.
*
* Authors: Korey Sewell
*/
#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 "sim/eventq.hh"
#include "sim/faults.hh"
#include <queue>
class ThreadContext;
class BaseCPU;
namespace MipsISA
{
class MiscRegFile {
public:
// Give RegFile object, private access
friend class RegFile;
// 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<BankType> bankType;
BaseCPU *cpu;
public:
MiscRegFile();
MiscRegFile(BaseCPU *cpu);
void init();
void clear(unsigned tid_or_vpn = 0);
void reset(std::string core_name, unsigned num_threads, unsigned num_vpes);
void expandForMultithreading(unsigned num_threads, unsigned num_vpes);
void copyMiscRegs(ThreadContext *tc)
{
panic("Copy Misc. Regs Not Implemented Yet\n");
}
inline unsigned getVPENum(unsigned 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, unsigned tid) { }
MiscReg readRegNoEffect(int misc_reg, unsigned tid = 0);
MiscReg readReg(int misc_reg,
ThreadContext *tc, unsigned tid = 0);
MiscReg filterCP0Write(int misc_reg, MiscReg val) { return val; }
void setRegNoEffect(int misc_reg, const MiscReg &val, unsigned tid = 0);
void setReg(int misc_reg, const MiscReg &val,
ThreadContext *tc, unsigned tid = 0);
//////////////////////////////////////////////////////////
//
// 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();
/** 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];
};
inline std::string getMiscRegName(unsigned reg_idx);
} // namespace MipsISA
#endif
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