// Copyright (c) 2012-2013,2017 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.

syntax = "proto2";

// Put all the generated messages in a namespace
package ProtoMessage;

// Packet header with the identifier describing what object captured
// the trace, the version of this file format, and the tick frequency
// for all the packet time stamps.
message PacketHeader {
  required string obj_id = 1;
  optional uint32 ver = 2 [default = 0];
  required uint64 tick_freq = 3;

  // This is supposed to be wire equivalent to the "map" construct supported
  // by the proto3 version of the protobuf description syntax. When that
  // becomes widely available, this should be converted over to use it.
  message IdStringEntry {
    optional uint32 key = 1;
    optional string value = 2;
  }

  repeated IdStringEntry id_strings = 4;
}

// Each packet in the trace contains a tick (which can be translated
// to absolute time using the frequency in the header), the command,
// the address, and the size in bytes. The optional flags are used to
// capture the request flags that convey information about
// cacheability, if the packet is an instruction fetch or prefetch or
// not, etc. An optional id field is added for generic use to identify
// the packet or the "owner" of the packet. An example of the latter
// is the sequential id of an instruction, or the master id etc.
// An optional field for PC of the instruction for which this request is made
// is provided.
message Packet {
  required uint64 tick = 1;
  required uint32 cmd = 2;
  required uint64 addr = 3;
  required uint32 size = 4;
  optional uint32 flags = 5;
  optional uint64 pkt_id = 6;
  optional uint64 pc = 7;
}