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/*
* Copyright (c) 2015 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.
*
* 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: Andreas Sandberg
*/
#ifndef __SIM_PROBE_MEM_HH__
#define __SIM_PROBE_MEM_HH__
#include <memory>
#include "mem/packet.hh"
#include "sim/probe/probe.hh"
namespace ProbePoints {
/**
* A struct to hold on to the essential fields from a packet, so that
* the packet and underlying request can be safely passed on, and
* consequently modified or even deleted.
*/
struct PacketInfo {
MemCmd cmd;
Addr addr;
uint32_t size;
Request::FlagsType flags;
explicit PacketInfo(const PacketPtr& pkt) :
cmd(pkt->cmd),
addr(pkt->getAddr()),
size(pkt->getSize()),
flags(pkt->req->getFlags()) { }
};
/**
* Packet probe point
*
* This probe point provides a unified interface for components that
* want to instrument Packets in the memory system. Components should
* when possible adhere to the following naming scheme:
*
* <ul>
*
* <li>PktRequest: Requests sent out on the memory side of a normal
* components and incoming requests for memories. Packets should
* not be duplicated (i.e., a packet should only appear once
* irrespective of the receiving end requesting a retry).
*
* <li>PktResponse: Response received from the memory side of a
* normal component or a response being sent out from a memory.
*
* <li>PktRequestCPU: Incoming, accepted, memory request on the CPU
* side of a two-sided component. This probe point is primarily
* intended for components that cache or forward requests (e.g.,
* caches and XBars), single-sided components should use
* PktRequest instead. The probe point should only be called
* when a packet is accepted.
*
* <li>PktResponseCPU: Outgoing response memory request on the CPU
* side of a two-sided component. This probe point is primarily
* intended for components that cache or forward requests (e.g.,
* caches and XBars), single-sided components should use
* PktRequest instead.
*
* </ul>
*
*/
typedef ProbePointArg<PacketInfo> Packet;
typedef std::unique_ptr<Packet> PacketUPtr;
}
#endif
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