diff options
Diffstat (limited to 'src/mem/packet.hh')
| -rw-r--r-- | src/mem/packet.hh | 95 |
1 files changed, 61 insertions, 34 deletions
diff --git a/src/mem/packet.hh b/src/mem/packet.hh index be9bf5f57..48b32ec47 100644 --- a/src/mem/packet.hh +++ b/src/mem/packet.hh @@ -58,10 +58,8 @@ typedef std::list<PacketPtr> PacketList; #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 @@ -94,7 +92,6 @@ class Packet * 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; @@ -126,6 +123,12 @@ class Packet /** 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; @@ -164,17 +167,21 @@ class Packet 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, - IsWrite = 1 << 1, - IsPrefetch = 1 << 2, - IsInvalidate = 1 << 3, - IsRequest = 1 << 4, - IsResponse = 1 << 5, - NeedsResponse = 1 << 6, + IsRead = 1 << 0, + IsWrite = 1 << 1, + IsPrefetch = 1 << 2, + IsInvalidate = 1 << 3, + IsRequest = 1 << 4, + IsResponse = 1 << 5, + NeedsResponse = 1 << 6, IsSWPrefetch = 1 << 7, - IsHWPrefetch = 1 << 8 + IsHWPrefetch = 1 << 8, + IsUpgrade = 1 << 9, + HasData = 1 << 10 }; public: @@ -182,22 +189,24 @@ class Packet enum Command { InvalidCmd = 0, - ReadReq = IsRead | IsRequest | NeedsResponse, - WriteReq = IsWrite | IsRequest | NeedsResponse, - WriteReqNoAck = IsWrite | IsRequest, - ReadResp = IsRead | IsResponse | NeedsResponse, - WriteResp = IsWrite | IsResponse | NeedsResponse, - Writeback = IsWrite | IsRequest, + ReadReq = IsRead | IsRequest | NeedsResponse, + 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 | IsResponse | IsSWPrefetch | NeedsResponse, - HardPFResp = IsRead | IsResponse | IsHWPrefetch | NeedsResponse, + SoftPFResp = IsRead | IsResponse | IsSWPrefetch + | NeedsResponse | HasData, + HardPFResp = IsRead | IsResponse | IsHWPrefetch + | NeedsResponse | HasData, InvalidateReq = IsInvalidate | IsRequest, - WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest, - UpgradeReq = IsInvalidate | IsRequest | NeedsResponse, - UpgradeResp = IsInvalidate | IsResponse | NeedsResponse, + WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest | HasData, + UpgradeReq = IsInvalidate | IsRequest | IsUpgrade, ReadExReq = IsRead | IsInvalidate | IsRequest | NeedsResponse, - ReadExResp = IsRead | IsInvalidate | IsResponse | NeedsResponse + ReadExResp = IsRead | IsInvalidate | IsResponse + | NeedsResponse | HasData }; /** Return the string name of the cmd field (for debugging and @@ -213,16 +222,17 @@ class Packet /** The command field of the packet. */ Command cmd; - bool isRead() { return (cmd & IsRead) != 0; } - bool isWrite() { return (cmd & IsWrite) != 0; } - 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 isRead() const { return (cmd & IsRead) != 0; } + bool isWrite() const { return (cmd & IsWrite) != 0; } + bool isRequest() const { return (cmd & IsRequest) != 0; } + bool isResponse() const { return (cmd & IsResponse) != 0; } + bool needsResponse() const { return (cmd & NeedsResponse) != 0; } + bool isInvalidate() const { return (cmd & IsInvalidate) != 0; } + bool hasData() const { 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 isCacheFill() const { return (flags & CACHE_LINE_FILL) != 0; } + bool isNoAllocate() const { return (flags & NO_ALLOCATE) != 0; } + bool isCompressed() const { return (flags & COMPRESSED) != 0; } bool nic_pkt() { assert("Unimplemented\n" && 0); return false; } @@ -320,6 +330,10 @@ class Packet int icmd = (int)cmd; icmd &= ~(IsRequest); icmd |= IsResponse; + if (isRead()) + icmd |= HasData; + if (isWrite()) + icmd &= ~HasData; cmd = (Command)icmd; dest = src; srcValid = false; @@ -334,6 +348,10 @@ class Packet int icmd = (int)cmd; icmd &= ~(IsRequest); icmd |= IsResponse; + if (isRead()) + icmd |= HasData; + if (isWrite()) + icmd &= ~HasData; cmd = (Command)icmd; } @@ -383,5 +401,14 @@ class Packet bool intersect(Packet *p); }; + +/** This function given a functional packet and a timing packet either satisfies + * the timing packet, or updates the timing packet to reflect the updated state + * in the timing packet. It returns if the functional packet should continue to + * traverse the memory hierarchy or not. + */ bool fixPacket(Packet *func, Packet *timing); + +std::ostream & operator<<(std::ostream &o, const Packet &p); + #endif //__MEM_PACKET_HH |