#define NO_ALLOCATE 1 << 5
#define SNOOP_COMMIT 1 << 6
+//for now. @todo fix later
+#define NUM_MEM_CMDS 1 << 11
/**
* A Packet is used to encapsulate a transfer between two objects in
* the memory system (e.g., the L1 and L2 cache). (In contrast, a
* be called on it rather than simply delete.*/
bool arrayData;
-
/** The address of the request. This address could be virtual or
* physical, depending on the system configuration. */
Addr addr;
/** Used to calculate latencies for each packet.*/
Tick time;
+ /** The time at which the packet will be fully transmitted */
+ Tick finishTime;
+
+ /** The time at which the first chunk of the packet will be transmitted */
+ Tick firstWordTime;
+
/** The special destination address indicating that the packet
* should be routed based on its address. */
static const short Broadcast = -1;
NeedsResponse = 1 << 6,
IsSWPrefetch = 1 << 7,
IsHWPrefetch = 1 << 8,
- HasData = 1 << 9
+ IsUpgrade = 1 << 9,
+ HasData = 1 << 10
};
-//For statistics we need max number of commands, hard code it at
-//20 for now. @todo fix later
-#define NUM_MEM_CMDS 1 << 10
-
public:
/** List of all commands associated with a packet. */
enum Command
| NeedsResponse | HasData,
InvalidateReq = IsInvalidate | IsRequest,
WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest | HasData,
- UpgradeReq = IsInvalidate | IsRequest | NeedsResponse,
- UpgradeResp = IsInvalidate | IsResponse | NeedsResponse,
+ UpgradeReq = IsInvalidate | IsRequest | IsUpgrade,
ReadExReq = IsRead | IsInvalidate | IsRequest | NeedsResponse,
ReadExResp = IsRead | IsInvalidate | IsResponse
| NeedsResponse | HasData
* for returning as a response to that request. Used for timing
* accesses only. For atomic and functional accesses, the
* request packet is always implicitly passed back *without*
- * modifying the command or destination fields, so this function
+ * modifying the destination fields, so this function
* should not be called. */
void makeTimingResponse() {
assert(needsResponse());
int icmd = (int)cmd;
icmd &= ~(IsRequest);
icmd |= IsResponse;
+ if (isRead())
+ icmd |= HasData;
+ if (isWrite())
+ icmd &= ~HasData;
cmd = (Command)icmd;
dest = src;
srcValid = false;
}
+ /** Take a request packet and modify it in place to be suitable
+ * for returning as a response to that request.
+ */
+ void makeAtomicResponse() {
+ assert(needsResponse());
+ assert(isRequest());
+ int icmd = (int)cmd;
+ icmd &= ~(IsRequest);
+ icmd |= IsResponse;
+ cmd = (Command)icmd;
+ }
+
/** Take a request packet that has been returned as NACKED and modify it so
* that it can be sent out again. Only packets that need a response can be
* NACKED, so verify that that is true. */