Altera RapidIO MegaCore Function - Manual (Page 166)

7–4 Chapter 7: Testbenches
RapidIO MegaCore Function August 2014 Altera Corporation
User Guide
Read and write tasks that are defined in the BFM instance, bfm_cnt_master, program
the DUT’s registers. Read and write tasks defined in the BFM instance
sister_bfm_cnt_master program the sister_rio module’s registers. For the exact
parameters passed to these tasks, refer to the file _tb.v. The tasks drive
either a write or read transaction across the System Maintenance Avalon-MM slave
interface.
In the configuration shown in Figure 7–1 on page 7–2 , the IP cores can exchange basic
packets across the serial link.
Maintenance Write and Read Transactions
If the Maintenance module is present, the testbench sends a few MAINTENANCE read
and write request packets from the DUT to the sister_rio module. Transactions are
initiated by Avalon-MM transactions on the DUT's Maintenance Avalon-MM slave
interface, and are checked on the sister_rio’s Maintenance Avalon-MM master
interface.
The first set of tests performed are MAINTENANCE write and read requests. The DUT
sends two MAINTENANCE write requests to the sister_rio module. The writes are
performed by running the rw_addr_data task defined inside the BFM instance,
bfm_mnt_master. The bfm_mnt_master is an instance of the module
avalon_bfm_master, defined in the file _avalon_bfm_master.v. The
following parameters are passed to the task:
sister_rio 0x0013C
General Control
CSR
Enable Request packet generation by the
sister_rio module.
32'h6000_0000
rio 0x1040C
Input/Output Slave
Window 0 Control
Set the DESTINATION_ID for outgoing
transactions to a value 0x55 or 0x5555. The
width of the DESTINATION_ID field depends on
the sister_rio device ID width. This value
matches the base device ID of the sister_rio
module.
32'h0055_0000 or
32'h5555_0000
rio 0x10404
Input/Output Slave
Window 0 Mask
Define the Input/Output Avalon-MM Slave
Window
0 to cover the whole address space
(mask set to all zeros) and enable it.
32'h0000_0004
sister_rio 0x10504
Input/Output Slave
Interrupt Enable
Enable the I/O slave interrupts. 32'h0000_000F
sister_rio 0x10304
Input/Output
Master Window 0
Mask
Enable the sister_rio I/O Master Window 0,
which allows the sister_rio to receive I/O
transactions.
32'h0000_0004
rio 0x1010C
TX Maintenance
Window 0 Control
Set the DESTINATION_ID for outgoing
MAINTENANCE
packets to 0x55 or 0x5555,
depending on the sister_rio device ID width. This
value matches the base device ID of the sister_rio
module. Set the hop count to 0xFF.
32'h0055_FF00
or 32'h5555_FF00
rio 0x10104
TX Maintenance
Window 0 Mask
Enable the TX Maintenance window 0. 32'h0000_0004
Table 7–1. Testbench Registers (Part 2 of 2)
Module
Register
Address
Register Name Description Value