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/*
* Copyright (c) 2009 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: Gabe Black
*/
#ifndef __ARCH_MIPS_ISA_HH__
#define __ARCH_MIPS_ISA_HH__
#include <queue>
#include <string>
#include <vector>
#include "arch/mips/registers.hh"
#include "arch/mips/types.hh"
#include "cpu/reg_class.hh"
#include "sim/eventq.hh"
#include "sim/sim_object.hh"
class BaseCPU;
class Checkpoint;
class EventManager;
struct MipsISAParams;
class ThreadContext;
namespace MipsISA
{
class ISA : public SimObject
{
public:
// The MIPS name for this file is CP0 or Coprocessor 0
typedef ISA CP0;
typedef MipsISAParams Params;
protected:
// Number of threads and vpes an individual ISA state can handle
uint8_t numThreads;
uint8_t numVpes;
enum BankType {
perProcessor,
perThreadContext,
perVirtProcessor
};
std::vector<std::vector<MiscReg> > miscRegFile;
std::vector<std::vector<MiscReg> > miscRegFile_WriteMask;
std::vector<BankType> bankType;
public:
void clear();
void configCP();
unsigned getVPENum(ThreadID tid) const;
//////////////////////////////////////////////////////////
//
// 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 readMiscRegNoEffect(int misc_reg, ThreadID tid = 0) const;
//template <class TC>
MiscReg readMiscReg(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 setMiscRegNoEffect(int misc_reg, const MiscReg &val,
ThreadID tid = 0);
//template <class TC>
void setMiscReg(int misc_reg, const MiscReg &val,
ThreadContext *tc, ThreadID 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:
ISA::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(Cycles delay);
/** Unschedule This Event */
void unscheduleEvent();
};
// Schedule a CP0 Update Event
void scheduleCP0Update(BaseCPU *cpu, Cycles delay = Cycles(0));
// If any changes have been made, then check the state for changes
// and if necessary alert the CPU
void updateCPU(BaseCPU *cpu);
// Keep a List of CPU Events that need to be deallocated
std::queue<CP0Event*> cp0EventRemoveList;
static std::string miscRegNames[NumMiscRegs];
public:
void startup(ThreadContext *tc) {}
/// Explicitly import the otherwise hidden startup
using SimObject::startup;
const Params *params() const;
ISA(Params *p);
RegId flattenRegId(const RegId& regId) const { return regId; }
int
flattenIntIndex(int reg) const
{
return reg;
}
int
flattenFloatIndex(int reg) const
{
return reg;
}
// dummy
int
flattenCCIndex(int reg) const
{
return reg;
}
int
flattenMiscIndex(int reg) const
{
return reg;
}
};
}
#endif
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