Changes between Initial Version and Version 1 of Mapping Table

Timestamp:

May 16, 2007, 4:02:16 PM (17 years ago)

Author:

alain

Comment:

--

Mapping Table

@@ +1 @@
+[wiki:Component SocLib Components General Index] 
+
+= !MappingTable Functional Description =
+
+This object is NOT an hardware component. It can be used by the system designer to describe
+the memory mapping and address decoding scheme of any hardware architecture build with
+the SoCLib hardware components.
+
+All VCI initiatores and VCI targets share the same "flat" address space, but the address decoding 
+scheme supports a multi-level structured interconnect.
+
+== One level interconnect ==
+
+This is the simplest case:
+ * each VCI component is identified by a simple index.
+ * and all VCI targets must have different indexes. Most hardware interconnects (such as the make the assumption that the target indexes 
+ * each VCI  is identified by a simple index, and all initiators must have different indexes. The initiator index
+must be equal to the VCI SRCID value.
+ * The VCI address is structured in two fields
+ 
+== Two level interconnect ==
+
+The hardware architecture is supposed to be split into several subsystems (or clusters),
+with a global interconnect for inter-cluster communications, and one local interconnect in
+each cluster for intra-cluster communications.
+
+ * each VCI component is identified by a structured index containing two indexes:
+   * a global index that is the subsystem (or cluster) index.
+   * a local index, that identifies the VCI component in the cluster.
+ * All , and all targets must have different indexes. Most hardware interconnects (such as the make the assumption that the target indexes 
+ * each VCI  is identified by a simple index, and all initiators must have different indexes. The initiator index
+must be equal to the VCI SRCID value.
+
+
+eand each VCI component is identified
+by abut the address decoding
+scheme supports.