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| author | Geoffrey Blake <geoffrey.blake@arm.com> | 2012-01-09 18:10:05 -0600 |
|---|---|---|
| committer | Geoffrey Blake <geoffrey.blake@arm.com> | 2012-01-09 18:10:05 -0600 |
| commit | e826d23a2eae6136f20f74d8d48601ff49349e58 (patch) | |
| tree | 65ddaabb4931a5a40961424615bc3c5629fd0dc9 /src/mem/packet.hh | |
| parent | bda1125e882eaf8c127ebdae0d847bf2148832ad (diff) | |
| download | gem5-e826d23a2eae6136f20f74d8d48601ff49349e58.tar.xz | |
Packet: Add derived class FunctionalPacket to enable partial functional reads
This adds the derived class FunctionalPacket to fix a long standing
deficiency in the Packet class where it was unable to handle finding data to
partially satisfy a functional access. Made this a derived class as
functional accesses are used only in certain contexts and to not add any
additional overhead to the existing Packet class.
Diffstat (limited to 'src/mem/packet.hh')
| -rw-r--r-- | src/mem/packet.hh | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/mem/packet.hh b/src/mem/packet.hh index be0c20d42..6347c21ea 100644 --- a/src/mem/packet.hh +++ b/src/mem/packet.hh @@ -299,6 +299,13 @@ class Packet : public FastAlloc, public Printable */ MemCmd origCmd; + /** + * These values specify the range of bytes found that satisfy a + * functional read. + */ + uint16_t bytesValidStart; + uint16_t bytesValidEnd; + public: /// Used to calculate latencies for each packet. Tick time; @@ -507,7 +514,8 @@ class Packet : public FastAlloc, public Printable */ Packet(Request *_req, MemCmd _cmd, NodeID _dest) : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), - dest(_dest), time(curTick()), senderState(NULL) + dest(_dest), bytesValidStart(0), bytesValidEnd(0), + time(curTick()), senderState(NULL) { if (req->hasPaddr()) { addr = req->getPaddr(); @@ -526,7 +534,8 @@ class Packet : public FastAlloc, public Printable */ Packet(Request *_req, MemCmd _cmd, NodeID _dest, int _blkSize) : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), - dest(_dest), time(curTick()), senderState(NULL) + dest(_dest), bytesValidStart(0), bytesValidEnd(0), + time(curTick()), senderState(NULL) { if (req->hasPaddr()) { addr = req->getPaddr() & ~(_blkSize - 1); @@ -547,6 +556,7 @@ class Packet : public FastAlloc, public Printable : cmd(pkt->cmd), req(pkt->req), data(pkt->flags.isSet(STATIC_DATA) ? pkt->data : NULL), addr(pkt->addr), size(pkt->size), src(pkt->src), dest(pkt->dest), + bytesValidStart(pkt->bytesValidStart), bytesValidEnd(pkt->bytesValidEnd), time(curTick()), senderState(pkt->senderState) { if (!clearFlags) @@ -554,6 +564,7 @@ class Packet : public FastAlloc, public Printable flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE|VALID_SRC|VALID_DST)); flags.set(pkt->flags & STATIC_DATA); + } /** |