User guide

Chapter 17: Testbench and Design Example 17–19
Root Port Design Example
December 2013 Altera Corporation Cyclone V Hard IP for PCI Express
User Guide
■ Test Driver (altpcietb_bfm_driver_rp.v)—the chaining DMA Endpoint test driver
which configures the Root Port and Endpoint for DMA transfer and checks for the
successful transfer of data. Refer to the “Test Driver Module” on page 17–14 for a
detailed description.
You can use the example Root Port design for Verilog HDL simulation. All of the
modules necessary to implement the example design with the variation file are
contained in altpcietb_bfm_ep_example_chaining_pipen1b.v.
The top-level of the testbench instantiates the following key files:
■ altlpcietb_bfm_top_ep.v— this is the Endpoint BFM. This file also instantiates the
SERDES and PIPE interface.
■ altpcietb_pipe_phy.v—used to simulate the PIPE interface.
■ altpcietb_bfm_ep_example_chaining_pipen1b.v—the top-level of the Root Port
design example that you use for simulation. This module instantiates the Root Port
variation, <variation_name>.v, and the Root Port application
altpcietb_bfm_vc_intf_<application_width>. This module provides both PIPE and
serial interfaces for the simulation environment. This module has two debug ports
named
test_out _ icm (which is the test_out signal from the Hard IP) and
test_in which allows you to monitor and control internal states of the Hard IP
variation. (Refer to “Test Signals” on page 7–54.)
Figure 17–3. Root Port Design Example
Root Port
Variation
(variation_name.v)
Avalon-ST Interface
(altpcietb_bfm_vc_intf)
Test Driver
(altpcietb_bfm_
driver_rp.v)
BFM Shared Memory
(altpcietb_bfm_shmem
_common)
BFM Read/Write Shared Request Procedures
BFM Configuration Procedures
BFM Request Interface
(altpcietb_bfm_req_intf_common)
BFM Log Interface
(altpcietb_bfm_log
_common)
PCI Express
Link
Root Port BFM Tasks and Shared Memory
altpcietb_bfm_ep_example_chaining_pipe1b.v
Avalon-ST