#define __MEM_PACKET_HH__
#include "mem/request.hh"
-#include "arch/isa_traits.hh"
+#include "sim/host.hh"
#include "sim/root.hh"
#include <list>
+#include <cassert>
struct Packet;
typedef Packet* PacketPtr;
#define CACHE_LINE_FILL 1 << 3
#define COMPRESSED 1 << 4
#define NO_ALLOCATE 1 << 5
+#define SNOOP_COMMIT 1 << 6
-//For statistics we need max number of commands, hard code it at
-//20 for now. @todo fix later
-#define NUM_MEM_CMDS 1 << 9
-
+//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;
/** The size of the request or transfer. */
int size;
- /** The offset within the block that represents the data. */
- int offset;
-
/** Device address (e.g., bus ID) of the source of the
* transaction. The source is not responsible for setting this
* field; it is set implicitly by the interconnect when the
bool addrSizeValid;
/** Is the 'src' field valid? */
bool srcValid;
- /** Is the offset valid. */
- bool offsetValid;
public:
/** 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;
private:
/** List of command attributes. */
+ // If you add a new CommandAttribute, make sure to increase NUM_MEM_CMDS
+ // as well.
enum CommandAttribute
{
IsRead = 1 << 0,
IsResponse = 1 << 5,
NeedsResponse = 1 << 6,
IsSWPrefetch = 1 << 7,
- IsHWPrefetch = 1 << 8
+ IsHWPrefetch = 1 << 8,
+ IsUpgrade = 1 << 9,
+ HasData = 1 << 10
};
public:
{
InvalidCmd = 0,
ReadReq = IsRead | IsRequest | NeedsResponse,
- WriteReq = IsWrite | IsRequest | NeedsResponse,
- WriteReqNoAck = IsWrite | IsRequest,
- ReadResp = IsRead | IsResponse,
- WriteResp = IsWrite | IsResponse,
- Writeback = IsWrite | IsRequest,
+ WriteReq = IsWrite | IsRequest | NeedsResponse | HasData,
+ WriteReqNoAck = IsWrite | IsRequest | HasData,
+ ReadResp = IsRead | IsResponse | NeedsResponse | HasData,
+ WriteResp = IsWrite | IsResponse | NeedsResponse,
+ Writeback = IsWrite | IsRequest | HasData,
SoftPFReq = IsRead | IsRequest | IsSWPrefetch | NeedsResponse,
HardPFReq = IsRead | IsRequest | IsHWPrefetch | NeedsResponse,
- SoftPFResp = IsRead | IsRequest | IsSWPrefetch | IsResponse,
- HardPFResp = IsRead | IsRequest | IsHWPrefetch | IsResponse,
+ SoftPFResp = IsRead | IsResponse | IsSWPrefetch
+ | NeedsResponse | HasData,
+ HardPFResp = IsRead | IsResponse | IsHWPrefetch
+ | NeedsResponse | HasData,
InvalidateReq = IsInvalidate | IsRequest,
- WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest,
- UpgradeReq = IsInvalidate | NeedsResponse,
- UpgradeResp = IsInvalidate | IsResponse,
- ReadExReq = IsRead | IsInvalidate | NeedsResponse,
+ WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest | HasData,
+ UpgradeReq = IsInvalidate | IsRequest | IsUpgrade,
+ ReadExReq = IsRead | IsInvalidate | IsRequest | NeedsResponse,
ReadExResp = IsRead | IsInvalidate | IsResponse
+ | NeedsResponse | HasData
};
/** Return the string name of the cmd field (for debugging and
bool isRequest() { return (cmd & IsRequest) != 0; }
bool isResponse() { return (cmd & IsResponse) != 0; }
bool needsResponse() { return (cmd & NeedsResponse) != 0; }
- bool isInvalidate() { return (cmd * IsInvalidate) != 0; }
+ bool isInvalidate() { return (cmd & IsInvalidate) != 0; }
+ bool hasData() { return (cmd & HasData) != 0; }
bool isCacheFill() { return (flags & CACHE_LINE_FILL) != 0; }
bool isNoAllocate() { return (flags & NO_ALLOCATE) != 0; }
+ bool isCompressed() { return (flags & COMPRESSED) != 0; }
+
+ bool nic_pkt() { assert("Unimplemented\n" && 0); return false; }
/** Possible results of a packet's request. */
enum Result
Addr getAddr() const { assert(addrSizeValid); return addr; }
int getSize() const { assert(addrSizeValid); return size; }
- int getOffset() const { assert(offsetValid); return offset; }
+ Addr getOffset(int blkSize) const { return addr & (Addr)(blkSize - 1); }
void addrOverride(Addr newAddr) { assert(addrSizeValid); addr = newAddr; }
void cmdOverride(Command newCmd) { cmd = newCmd; }
: data(NULL), staticData(false), dynamicData(false), arrayData(false),
addr(_req->paddr), size(_req->size), dest(_dest),
addrSizeValid(_req->validPaddr),
- srcValid(false), offsetValid(false),
+ srcValid(false),
req(_req), coherence(NULL), senderState(NULL), cmd(_cmd),
result(Unknown)
{
flags = 0;
+ time = curTick;
}
/** Alternate constructor if you are trying to create a packet with
Packet(Request *_req, Command _cmd, short _dest, int _blkSize)
: data(NULL), staticData(false), dynamicData(false), arrayData(false),
addr(_req->paddr & ~(_blkSize - 1)), size(_blkSize),
- offset(_req->paddr & (_blkSize - 1)), dest(_dest),
- addrSizeValid(_req->validPaddr), srcValid(false), offsetValid(true),
+ dest(_dest),
+ addrSizeValid(_req->validPaddr), srcValid(false),
req(_req), coherence(NULL), senderState(NULL), cmd(_cmd),
result(Unknown)
{
flags = 0;
+ time = curTick;
}
/** Destructor. */
assert(req->validPaddr);
addr = req->paddr;
size = req->size;
+ time = req->time;
addrSizeValid = true;
result = Unknown;
if (dynamicData) {
* 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());
+ assert(isRequest());
int icmd = (int)cmd;
- icmd &= ~(IsRequest | NeedsResponse);
+ 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. */
projects / gem5.git / blobdiff