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/*
* Copyright (c) 2020 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright 2020 Google Inc.
*
* 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.
*/
#ifndef __ARCH_GENERIC_ISA_HH__
#define __ARCH_GENERIC_ISA_HH__
#include <vector>
#include "arch/generic/pcstate.hh"
#include "base/logging.hh"
#include "cpu/reg_class.hh"
#include "mem/packet.hh"
#include "mem/request.hh"
#include "sim/sim_object.hh"
namespace gem5
{
class ThreadContext;
class ExecContext;
class BaseISA : public SimObject
{
public:
typedef std::vector<const RegClass *> RegClasses;
protected:
using SimObject::SimObject;
ThreadContext *tc = nullptr;
RegClasses _regClasses;
public:
virtual PCStateBase *newPCState(Addr new_inst_addr=0) const = 0;
virtual void clear() {}
virtual void clearLoadReservation(ContextID cid) {}
virtual RegVal readMiscRegNoEffect(RegIndex idx) const = 0;
virtual RegVal readMiscReg(RegIndex idx) = 0;
virtual void setMiscRegNoEffect(RegIndex idx, RegVal val) = 0;
virtual void setMiscReg(RegIndex idx, RegVal val) = 0;
virtual void takeOverFrom(ThreadContext *new_tc, ThreadContext *old_tc) {}
virtual void setThreadContext(ThreadContext *_tc) { tc = _tc; }
virtual uint64_t getExecutingAsid() const { return 0; }
virtual bool inUserMode() const = 0;
virtual void copyRegsFrom(ThreadContext *src) = 0;
virtual void resetThread() { panic("Thread reset not implemented."); }
const RegClasses &regClasses() const { return _regClasses; }
// Locked memory handling functions.
virtual void handleLockedRead(const RequestPtr &req) {}
virtual void
handleLockedRead(ExecContext *xc, const RequestPtr &req)
{
handleLockedRead(req);
}
virtual bool
handleLockedWrite(const RequestPtr &req, Addr cacheBlockMask)
{
return true;
}
virtual bool
handleLockedWrite(ExecContext *xc, const RequestPtr &req,
Addr cacheBlockMask)
{
return handleLockedWrite(req, cacheBlockMask);
}
virtual void handleLockedSnoop(PacketPtr pkt, Addr cacheBlockMask) {}
virtual void
handleLockedSnoop(ExecContext *xc, PacketPtr pkt, Addr cacheBlockMask)
{
handleLockedSnoop(pkt, cacheBlockMask);
}
virtual void handleLockedSnoopHit() {}
virtual void
handleLockedSnoopHit(ExecContext *xc)
{
handleLockedSnoopHit();
}
virtual void globalClearExclusive() {}
virtual void
globalClearExclusive(ExecContext *xc)
{
globalClearExclusive();
}
};
} // namespace gem5
#endif // __ARCH_GENERIC_ISA_HH__