Changes between Version 41 and Version 42 of InterconnexionNetworks

Timestamp:

Mar 18, 2013, 4:15:10 PM (11 years ago)

Author:

alain

Comment:

--

InterconnexionNetworks

@@ -80 +80 @@
  * bit 2 can be used to check for a TYPE_READ (bit 2 = 0)
 
-When a given initiator can send several simultaneous transactions of a given type (such as several simultaneous '''WRITE''' transactions), the VCI '''TRDID''' field is used to discriminate them.
+When a given initiator can send several simultaneous transactions of a given type (such as several simultaneous '''WRITE''' transactions), the VCI '''TRDID''' field is used to discriminate them. The '''TRDID''' field is 4 bits.
 
 ==== 3.1.1 VCI READ transaction ====
 
-A VCI '''READ''' command packet contains one flit.
+A VCI '''READ''' command packet contains one flit. In case of burst, all addresses must within the same cache line.
  * The VCI '''CMD''' field must be set to CMD_READ.
- * The VCI '''TRDID''' field is not used by the L1 cache. It is used by I/O controlers with multi channel DMA capabilities to transmit t
+ * The VCI '''TRDID''' field is not used by the L1 cache, but can be used by multi-channel DMA controllers to transmit the channel index.
  * The VCI '''PKTID''' field can be any of the 4 TYPE_READ_* of the previous table.
 
 A VCI '''READ''' response packet returns either
- * A single flit containing the uncached data in the '''RDATA''' field (for a '''PKTID''' = TYPE_READ_*_UNC).
- * up to 16 flits containing one word per flit in the '''RDATA''' field (for a '''PKTID''' = TYPE_READ_*_MISS).
+ * Up to 16 flits containing the uncached data in the '''RDATA''' field (for a '''PKTID''' = TYPE_READ_*_UNC).
+ * Exactly 16 flits containing one word per flit in the '''RDATA''' field (for a '''PKTID''' = TYPE_READ_*_MISS).
 
 ==== 3.1.2 VCI WRITE transaction ====
 
-A VCI '''WRITE''' command packet contains from 1 to 16 flits within the same cache line.
+A VCI '''WRITE''' command packet contains from 1 to 16 flits. In case of burst, all addresses must within the same cache line.
  * The VCI '''CMD''' field must be set to CMD_WRITE.
- * The VCI '''TRDID''' field is used by the L1 cache to index its write buffer (4 write buffer slots of 4 words each). It is used by I/Olities to transmit the channel index.
+ * The VCI '''TRDID''' field is used by the L1 cache to index its write buffer. It can be used by multi-channel DMA controllers to transmit the channel index.
  * The VCI '''PKTID''' field must be TYPE_WRITE.
 
@@ -104 +104 @@
 ==== 3.1.3 VCI LL (Linked Load) transaction ====
 
-A VCI '''LL (Linked Load)''' command packet contains a single flit.
+A VCI '''LL (Linked Load)''' command packet contains one single flit.
 ('''N.B.''': this request is only sent by a L1 cache and can only target a memory cache)
  * The VCI '''CMD''' field must be set to CMD_LOCKED_READ.