Altera PCI Compiler - Manual (Page 217)

Altera Corporation User Guide Version 11.1 4–7
October 2011 PCI Compiler
Testbench
Table 4–5 shows the testbench's target termination support. The master
transactor and the local master respond to the target terminations by
terminating the transaction gracefully and releasing the PCI bus.
Master Transactor (mstr_tranx)
The master transactor simulates the master behavior on the PCI bus. It
serves as an initiator of PCI transactions for Altera PCI testbench. The
master transactor has three main sections:
■ PROCEDURES (VHDL) or TASKS (Verilog HDL)
■ INITIALIZATION
■ USER COMMANDS
PROCEDURES and TASKS Sections
The PROCEDURES (VHDL) and TASKS (Verilog HDL) sections define
the events that are executed for the user commands supported by the
master transactor. The events written in the PROCEDURES and TASKS
sections follow the phases of a standard PCI transaction as defined by the
PCI Local Bus Specification, Revision 3.0, including:
■ Address phase
■ Turn-around phase (read transactions)
■ Data phases
■ Turn-around phase
The master transactor terminates the PCI transactions in the following
cases:
■ The PCI transaction has successfully transferred all the intended data
■ The PCI target terminates the transaction prematurely with a target
retry, disconnect, or abort as defined in the PCI Local Bus Specification,
Revision 3.0
■ A target does not claim the transaction resulting in a master abort
Table 4–5. PCI Testbench Target Termination Support
Features Master Transactor Target Transactor Local Master Local Target
Target abort v v
Target retry v v v v
Target disconnect v v v v