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/*
* Copyright N) 2007 MIPS Technologies, Inc. All Rights Reserved
*
* This software is part of the M5 simulator.
*
* THIS IS A LEGAL AGREEMENT. BY DOWNLOADING, USING, COPYING, CREATING
* DERIVATIVE WORKS, AND/OR DISTRIBUTING THIS SOFTWARE YOU ARE AGREEING
* TO THESE TERMS AND CONDITIONS.
*
* Permission is granted to use, copy, create derivative works and
* distribute this software and such derivative works for any purpose,
* so long as (1) the copyright notice above, this grant of permission,
* and the disclaimer below appear in all copies and derivative works
* made, (2) the copyright notice above is augmented as appropriate to
* reflect the addition of any new copyrightable work in a derivative
* work (e.g., Copyright N) <Publication Year> Copyright Owner), and (3)
* the name of MIPS Technologies, Inc. ($(B!H(BMIPS$(B!I(B) is not used in any
* advertising or publicity pertaining to the use or distribution of
* this software without specific, written prior authorization.
*
* THIS SOFTWARE IS PROVIDED $(B!H(BAS IS.$(B!I(B MIPS MAKES NO WARRANTIES AND
* DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, STATUTORY, IMPLIED OR
* OTHERWISE, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT OF THIRD PARTY RIGHTS, REGARDING THIS SOFTWARE.
* IN NO EVENT SHALL MIPS BE LIABLE FOR ANY DAMAGES, INCLUDING DIRECT,
* INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR PUNITIVE DAMAGES OF
* ANY KIND OR NATURE, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
* THIS SOFTWARE AND/OR THE USE OF THIS SOFTWARE, WHETHER SUCH LIABILITY
* IS ASSERTED ON THE BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE OR
* STRICT LIABILITY), OR OTHERWISE, EVEN IF MIPS HAS BEEN WARNED OF THE
* POSSIBILITY OF ANY SUCH LOSS OR DAMAGE IN ADVANCE.
*
* Authors: Richard Strong
*/
#ifndef __ARCH_MIPS_INTERRUPT_HH__
#define __ARCH_MIPS_INTERRUPT_HH__
#include "arch/mips/faults.hh"
#include "base/compiler.hh"
namespace MipsISA
{
class Interrupts
{
/*
protected:
uint8_t intstatus;
bool oncputimerintr;
public:
Interrupts()
{
intstatus = 0;
newInfoSet = false;
oncputimerintr = false;
}
// post(int int_num, int index) is responsible
// for posting an interrupt. It sets a bit
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void post(int int_num, int index);
// clear(int int_num, int index) is responsible
// for clearing an interrupt. It clear a bit
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void clear(int int_num, int index);
// clear_all() is responsible
// for clearing all interrupts. It clears all bits
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void clear_all();
// getInterrupt(ThreadContext * tc) checks if an interrupt
// should be returned. It ands the interrupt mask and
// and interrupt pending bits to see if one exists. It
// also makes sure interrupts are enabled (IE) and
// that ERL and ERX are not set
//
Fault getInterrupt(ThreadContext * tc);
// updateIntrInfo(ThreadContext *tc) const syncs the
// MIPS cause register with the instatus variable. instatus
// is essentially a copy of the MIPS cause[IP7:IP0]
//
void updateIntrInfo(ThreadContext *tc) const;
void updateIntrInfoCpuTimerIntr(ThreadContext *tc) const;
bool onCpuTimerInterrupt(ThreadContext *tc) const;
uint64_t get_vec(int int_num);
bool check_interrupts(ThreadContext * tc) const{
//return (intstatus != 0) && !(tc->readPC() & 0x3);
if (oncputimerintr == false){
updateIntrInfo(tc);
return ((intstatus != 0) || onCpuTimerInterrupt(tc));
}
else
return true;
}
*/
protected:
//uint8_t intstatus;
//bool oncputimerintr;
public:
Interrupts()
{
//intstatus = 0;
newInfoSet = false;
//oncputimerintr = false;
}
// post(int int_num, int index) is responsible
// for posting an interrupt. It sets a bit
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void post(int int_num, ThreadContext* tc);
void post(int int_num, int index);
// clear(int int_num, int index) is responsible
// for clearing an interrupt. It clear a bit
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void clear(int int_num, ThreadContext* tc);
void clear(int int_num, int index);
// clear_all() is responsible
// for clearing all interrupts. It clears all bits
// in intstatus corresponding to Cause IP*. The
// MIPS register Cause is updated by updateIntrInfo
// which is called by check_interrupts
//
void clear_all(ThreadContext* tc);
void clear_all();
// getInterrupt(ThreadContext * tc) checks if an interrupt
// should be returned. It ands the interrupt mask and
// and interrupt pending bits to see if one exists. It
// also makes sure interrupts are enabled (IE) and
// that ERL and ERX are not set
//
Fault getInterrupt(ThreadContext * tc);
// updateIntrInfo(ThreadContext *tc) const syncs the
// MIPS cause register with the instatus variable. instatus
// is essentially a copy of the MIPS cause[IP7:IP0]
//
void updateIntrInfo(ThreadContext *tc) const;
bool interruptsPending(ThreadContext *tc) const;
bool onCpuTimerInterrupt(ThreadContext *tc) const;
uint64_t get_vec(int int_num);
bool check_interrupts(ThreadContext * tc) const{
return interruptsPending(tc);
}
void serialize(std::ostream &os)
{
fatal("Serialization of Interrupts Unimplemented for MIPS");
//SERIALIZE_ARRAY(interrupts, NumInterruptLevels);
//SERIALIZE_SCALAR(intstatus);
}
void unserialize(Checkpoint *cp, const std::string §ion)
{
fatal("Unserialization of Interrupts Unimplemented for MIPS");
//UNSERIALIZE_ARRAY(interrupts, NumInterruptLevels);
//UNSERIALIZE_SCALAR(intstatus);
}
private:
bool newInfoSet;
int newIpl;
int newSummary;
};
}
#endif
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