2. HS/DSL Project Yael GrossmanArik Krantz Implementation and Synthesis of a 3- Port PCI-Express Switch

3. Project Description We will implement:  3 - port switch for PCI-Express  Transfer rate: 2.5 GBit/sec  1 upstream, 2 downstream full-duplex ports  CRC support at the DLL layer  Arbitration mechanism for incoming packets  Packet routing through lookup tables

4. Switch Relative to System

5. Layered Switch Model

6.  CRC computation and verification mechanism  Applied in the Data Link layer  Transport control mechanism  Via ACK/NACKs  Applied in the Data Link layer  Unacknowledged TLPs retransmitted after timeout  Routing mechanism  Forwarding based on central lookup table  Applied in the Transaction layer  Initial configuration mechanism  Static loading of lookup tables at startup Primary Structures

7. 1. Detailed design 2 weeks  Data flow diagram (transmitter/ receiver) for ports  Queue and buffer structure for ports  Lookup table structure and algorithm  Packet handling algorithms 2.System block design 2 weeks  Division of the system into interconnected entities  Definition of appropriate architecture per entity  Preparation for VHDL implementation 3.VHDL coding 4 weeks  In accordance with architecture design Semester Plan