346 lines
10 KiB
Text
346 lines
10 KiB
Text
|
|
||
|
/*
|
||
|
* Copyright (c) 1999-2005 Mark D. Hill and David A. Wood
|
||
|
* 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.
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* $Id$
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
machine(Directory, "MOSI Broadcast Optimized") {
|
||
|
|
||
|
|
||
|
MessageBuffer addressFromDir, network="To", virtual_network="0", ordered="true";
|
||
|
MessageBuffer dataFromDir, network="To", virtual_network="1", ordered="false";
|
||
|
|
||
|
MessageBuffer addressToDir, network="From", virtual_network="0", ordered="true";
|
||
|
MessageBuffer dataToDir, network="From", virtual_network="1", ordered="false";
|
||
|
|
||
|
|
||
|
enumeration(State, desc="Directory states", default="Directory_State_C") {
|
||
|
C, desc="Cold - no processor has requested this line";
|
||
|
I, desc="Idle";
|
||
|
S, desc="Shared";
|
||
|
SS, desc="Shared, 2 or more shares";
|
||
|
OS, desc="Owned by a cache";
|
||
|
OSS, desc="Owned by a cache, present in at least 3 caches";
|
||
|
M, desc="Modified", format="!b";
|
||
|
}
|
||
|
|
||
|
// ** EVENTS **
|
||
|
|
||
|
enumeration(Event, desc="Directory events") {
|
||
|
// From Address network
|
||
|
OtherAddress, desc="We saw an address msg to someone else";
|
||
|
GETS, desc="A GETS arrives";
|
||
|
GET_INSTR, desc="A GETInstr arrives";
|
||
|
GETX, desc="A GETX arrives", format="!r";
|
||
|
PUTX_Owner, desc="A PUTX arrives, requestor is owner";
|
||
|
PUTX_NotOwner, desc="A PUTX arrives, requestor is not owner", format="!r";
|
||
|
Memory_Data, desc="Fetched data from memory arrives";
|
||
|
Memory_Ack, desc="Writeback Ack from memory arrives";
|
||
|
}
|
||
|
|
||
|
// TYPES
|
||
|
|
||
|
// DirectoryEntry
|
||
|
structure(Entry, desc="...") {
|
||
|
State DirectoryState, desc="Directory state";
|
||
|
bool DirOwner, default="true", desc="Is dir owner?";
|
||
|
MachineID ProcOwner, desc="Processor Owner";
|
||
|
DataBlock DataBlk, desc="data for the block";
|
||
|
}
|
||
|
|
||
|
external_type(DirectoryMemory) {
|
||
|
Entry lookup(Address);
|
||
|
bool isPresent(Address);
|
||
|
}
|
||
|
|
||
|
// to simulate detailed DRAM
|
||
|
external_type(MemoryControl, inport="yes", outport="yes") {
|
||
|
|
||
|
}
|
||
|
|
||
|
// ** OBJECTS **
|
||
|
|
||
|
DirectoryMemory directory, constructor_hack="i";
|
||
|
MemoryControl memBuffer, constructor_hack="i";
|
||
|
|
||
|
void profile_request(int cache_state, State directory_state, GenericRequestType request_type);
|
||
|
|
||
|
State getState(Address addr) {
|
||
|
if (directory.isPresent(addr)) {
|
||
|
return directory[addr].DirectoryState;
|
||
|
}
|
||
|
return State:C;
|
||
|
}
|
||
|
|
||
|
void setState(Address addr, State state) {
|
||
|
if (directory.isPresent(addr)) {
|
||
|
directory[addr].DirectoryState := state;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// ** OUT_PORTS **
|
||
|
|
||
|
out_port(dataNetwork_out, DataMsg, dataFromDir);
|
||
|
out_port(addressNetwork_out, AddressMsg, addressFromDir);
|
||
|
out_port(memQueue_out, MemoryMsg, memBuffer);
|
||
|
|
||
|
|
||
|
// ** IN_PORTS **
|
||
|
|
||
|
// Address Network
|
||
|
in_port(addressNetwork_in, AddressMsg, addressToDir) {
|
||
|
if (addressNetwork_in.isReady()) {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
if(map_Address_to_Directory(in_msg.Address) != machineID) {
|
||
|
trigger(Event:OtherAddress, in_msg.Address);
|
||
|
} else if (in_msg.Type == CoherenceRequestType:GETS) {
|
||
|
trigger(Event:GETS, in_msg.Address);
|
||
|
} else if (in_msg.Type == CoherenceRequestType:GET_INSTR) {
|
||
|
trigger(Event:GET_INSTR, in_msg.Address);
|
||
|
} else if (in_msg.Type == CoherenceRequestType:GETX) {
|
||
|
trigger(Event:GETX, in_msg.Address);
|
||
|
} else if (in_msg.Type == CoherenceRequestType:PUTX) {
|
||
|
if (in_msg.Requestor == directory[in_msg.Address].ProcOwner && directory[in_msg.Address].DirOwner == false) {
|
||
|
trigger(Event:PUTX_Owner, in_msg.Address);
|
||
|
} else {
|
||
|
trigger(Event:PUTX_NotOwner, in_msg.Address);
|
||
|
}
|
||
|
} else {
|
||
|
error("unexpected message");
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// off-chip memory request/response is done
|
||
|
in_port(memQueue_in, MemoryMsg, memBuffer) {
|
||
|
if (memQueue_in.isReady()) {
|
||
|
peek(memQueue_in, MemoryMsg) {
|
||
|
if (in_msg.Type == MemoryRequestType:MEMORY_READ) {
|
||
|
trigger(Event:Memory_Data, in_msg.Address);
|
||
|
} else if (in_msg.Type == MemoryRequestType:MEMORY_WB) {
|
||
|
trigger(Event:Memory_Ack, in_msg.Address);
|
||
|
} else {
|
||
|
DEBUG_EXPR(in_msg.Type);
|
||
|
error("Invalid message");
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// *** ACTIONS ***
|
||
|
|
||
|
action(d_sendDataMsg, "d", desc="Send data message to requestor") {
|
||
|
peek(memQueue_in, MemoryMsg) {
|
||
|
enqueue(dataNetwork_out, DataMsg, latency="1") {
|
||
|
out_msg.Address := in_msg.Address;
|
||
|
out_msg.Sender := machineID;
|
||
|
out_msg.Destination.add(in_msg.OriginalRequestorMachId);
|
||
|
out_msg.DestMachine := MachineType:L1Cache;
|
||
|
//out_msg.DataBlk := directory[in_msg.Address].DataBlk;
|
||
|
out_msg.DataBlk := in_msg.DataBlk;
|
||
|
out_msg.MessageSize := MessageSizeType:Data;
|
||
|
DEBUG_EXPR(in_msg.OriginalRequestorMachId);
|
||
|
DEBUG_EXPR(out_msg.DataBlk);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(j_popAddressQueue, "j", desc="Pop address queue.") {
|
||
|
addressNetwork_in.dequeue();
|
||
|
}
|
||
|
|
||
|
action(l_popMemQueue, "q", desc="Pop off-chip request queue") {
|
||
|
memQueue_in.dequeue();
|
||
|
}
|
||
|
|
||
|
action(p_profile, "p", desc="Profile this transition.") {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
profile_request(in_msg.CacheState, getState(address), convertToGenericType(in_msg.Type));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(m_setOwnerRequestor, "m", desc="Set owner = requestor") {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
directory[in_msg.Address].ProcOwner := in_msg.Requestor;
|
||
|
directory[in_msg.Address].DirOwner := false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
enqueue(memQueue_out, MemoryMsg, latency="1") {
|
||
|
out_msg.Address := address;
|
||
|
out_msg.Type := MemoryRequestType:MEMORY_READ;
|
||
|
out_msg.Sender := machineID;
|
||
|
out_msg.OriginalRequestorMachId := in_msg.Requestor;
|
||
|
out_msg.DataBlk := directory[in_msg.Address].DataBlk;
|
||
|
out_msg.MessageSize := in_msg.MessageSize;
|
||
|
//out_msg.Prefetch := in_msg.Prefetch;
|
||
|
DEBUG_EXPR(out_msg);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(qw_queueMemoryWBRequest, "qw", desc="Queue off-chip writeback request") {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
enqueue(memQueue_out, MemoryMsg, latency="1") {
|
||
|
out_msg.Address := address;
|
||
|
out_msg.Type := MemoryRequestType:MEMORY_WB;
|
||
|
out_msg.Sender := machineID;
|
||
|
out_msg.OriginalRequestorMachId := in_msg.Requestor;
|
||
|
out_msg.DataBlk := in_msg.DataBlk;
|
||
|
out_msg.MessageSize := in_msg.MessageSize;
|
||
|
//out_msg.Prefetch := in_msg.Prefetch;
|
||
|
DEBUG_EXPR(out_msg);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(r_writeDataFromRequest, "r", desc="Write request data to memory") {
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
directory[in_msg.Address].DataBlk := in_msg.DataBlk;
|
||
|
DEBUG_EXPR(in_msg.Address);
|
||
|
DEBUG_EXPR(in_msg.DataBlk);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
action(x_setOwnerToDirectory, "x", desc="Set owner equal to the directory"){
|
||
|
peek(addressNetwork_in, AddressMsg) {
|
||
|
directory[in_msg.Address].DirOwner := true;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// TRANSITIONS
|
||
|
|
||
|
// Ignore all address and data messages not bound for us
|
||
|
transition(C, OtherAddress) {
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
// PUTX_NotOwner Transitions
|
||
|
transition({I, S, SS, OS, OSS, M}, PUTX_NotOwner) {
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
// Transitions from Idle
|
||
|
transition({C, I}, {GETS,GET_INSTR}, S) {
|
||
|
//d_sendDataMsg;
|
||
|
qf_queueMemoryFetchRequest;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition({C, I}, GETX, M) {
|
||
|
//d_sendDataMsg;
|
||
|
qf_queueMemoryFetchRequest;
|
||
|
m_setOwnerRequestor;
|
||
|
p_profile;
|
||
|
j_popAddressQueue
|
||
|
}
|
||
|
|
||
|
// Transitions from Shared
|
||
|
transition({S, SS}, {GETS,GET_INSTR}, SS) {
|
||
|
//d_sendDataMsg;
|
||
|
qf_queueMemoryFetchRequest;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition({S, SS}, GETX, M) {
|
||
|
//d_sendDataMsg;
|
||
|
qf_queueMemoryFetchRequest;
|
||
|
m_setOwnerRequestor;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
// Transitions from Owned
|
||
|
transition({OS, OSS}, {GETS,GET_INSTR}, OSS) {
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition({OS, OSS}, GETX, M) {
|
||
|
m_setOwnerRequestor;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition(OS, PUTX_Owner, S) {
|
||
|
x_setOwnerToDirectory;
|
||
|
r_writeDataFromRequest;
|
||
|
qw_queueMemoryWBRequest;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition(OSS, PUTX_Owner, SS) {
|
||
|
x_setOwnerToDirectory;
|
||
|
r_writeDataFromRequest;
|
||
|
qw_queueMemoryWBRequest;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
// Transitions from Modified
|
||
|
transition(M, {GETS,GET_INSTR}, OS) {
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition(M, GETX) {
|
||
|
m_setOwnerRequestor;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition(M, PUTX_Owner, I) {
|
||
|
x_setOwnerToDirectory;
|
||
|
r_writeDataFromRequest;
|
||
|
qw_queueMemoryWBRequest;
|
||
|
p_profile;
|
||
|
j_popAddressQueue;
|
||
|
}
|
||
|
|
||
|
transition({C, I, S, SS, OS, OSS, M}, Memory_Data) {
|
||
|
d_sendDataMsg;
|
||
|
l_popMemQueue;
|
||
|
}
|
||
|
|
||
|
transition({C, I, S, SS, OS, OSS, M}, Memory_Ack) {
|
||
|
//a_sendAck;
|
||
|
l_popMemQueue;
|
||
|
}
|
||
|
|
||
|
}
|