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/*
* Copyright (c) 2009 Advanced Micro Devices, Inc.
* 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: Brad Beckmann
* Tushar Krishna
*/
machine(MachineType:Directory, "Garnet_standalone Directory")
: MessageBuffer * requestToDir, network="From", virtual_network="0",
vnet_type = "request";
MessageBuffer * forwardToDir, network="From", virtual_network="1",
vnet_type = "forward";
MessageBuffer * responseToDir, network="From", virtual_network="2",
vnet_type = "response";
{
// STATES
state_declaration(State, desc="Directory states", default="Directory_State_I") {
// Base states
I, AccessPermission:Invalid, desc="Invalid";
}
// Events
enumeration(Event, desc="Directory events") {
// processor requests
Receive_Request, desc="Receive Message";
Receive_Forward, desc="Receive Message";
Receive_Response, desc="Receive Message";
}
// TYPES
// DirectoryEntry
structure(Entry, desc="...", interface="AbstractEntry") {
State DirectoryState, desc="Directory state";
DataBlock DataBlk, desc="data for the block";
}
// ** FUNCTIONS **
Tick clockEdge();
State getState(Addr addr) {
return State:I;
}
void setState(Addr addr, State state) {
}
AccessPermission getAccessPermission(Addr addr) {
return AccessPermission:NotPresent;
}
void setAccessPermission(Addr addr, State state) {
}
void functionalRead(Addr addr, Packet *pkt) {
error("Garnet_standalone does not support functional read.");
}
int functionalWrite(Addr addr, Packet *pkt) {
error("Garnet_standalone does not support functional write.");
}
// ** IN_PORTS **
in_port(requestQueue_in, RequestMsg, requestToDir) {
if (requestQueue_in.isReady(clockEdge())) {
peek(requestQueue_in, RequestMsg) {
if (in_msg.Type == CoherenceRequestType:MSG) {
trigger(Event:Receive_Request, in_msg.addr);
} else {
error("Invalid message");
}
}
}
}
in_port(forwardQueue_in, RequestMsg, forwardToDir) {
if (forwardQueue_in.isReady(clockEdge())) {
peek(forwardQueue_in, RequestMsg) {
if (in_msg.Type == CoherenceRequestType:MSG) {
trigger(Event:Receive_Forward, in_msg.addr);
} else {
error("Invalid message");
}
}
}
}
in_port(responseQueue_in, RequestMsg, responseToDir) {
if (responseQueue_in.isReady(clockEdge())) {
peek(responseQueue_in, RequestMsg) {
if (in_msg.Type == CoherenceRequestType:MSG) {
trigger(Event:Receive_Response, in_msg.addr);
} else {
error("Invalid message");
}
}
}
}
// Actions
action(i_popIncomingRequestQueue, "i", desc="Pop incoming request queue") {
requestQueue_in.dequeue(clockEdge());
}
action(f_popIncomingForwardQueue, "f", desc="Pop incoming forward queue") {
forwardQueue_in.dequeue(clockEdge());
}
action(r_popIncomingResponseQueue, "r", desc="Pop incoming response queue") {
responseQueue_in.dequeue(clockEdge());
}
// TRANSITIONS
// The directory simply drops the received packets.
// The goal of Garnet_standalone is only to track network stats.
transition(I, Receive_Request) {
i_popIncomingRequestQueue;
}
transition(I, Receive_Forward) {
f_popIncomingForwardQueue;
}
transition(I, Receive_Response) {
r_popIncomingResponseQueue;
}
}
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