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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 <design_name>_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 <design_name>_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
- User Guide 1
- RapidIO MegaCore Function 1
- Contents 3
- Contents v 5
- Chapter 5. Signals 6
- Chapter 6. Software Interface 6
- Chapter 7. Testbenches 6
- Releases 10
- RapidIO IP Core Features 10
- Features 11
- Device Family Support 12
- Note to Table 1–2: 13
- Interoperability Testing 14
- Note to Table 1–4: 16
- Notes to Table 1–7: 18
- Notes to Table 1–8: 19
- Installation and Licensing 20
- 2. Getting Started 23
- Simulating IP Cores 26
- Calibration Clock 27
- Transceiver Settings 28
- IV GX Variations 28
- External Transceiver PLL 29
- Specifying Constraints 30
- Variations 32
- Core Instances 34
- Mode Selection 37
- Transceiver Selection 38
- Baud Rate 39
- Reference Clock Frequency 39
- Receive Buffer Size 39
- Transmit Buffer Size 39
- Enable 16-Bit Device ID Width 40
- Destination ID Checking 40
- Maintenance Logical Layer 41
- Port Write Tx Enable 42
- Port Write Rx Enable 42
- Avalon-MM Master 43
- Avalon-MM Slave 43
- Doorbell Slave 43
- Device ID 44
- Vendor ID 44
- Revision ID 44
- Processing Element Features 45
- Switch Support 45
- Enable Switch Support 46
- Number of Ports 46
- Port Number 46
- Source Operation 46
- Destination Operation 46
- 4. Functional Description 47
- Interfaces 48
- Avalon System Clock 49
- Reference Clock 50
- Other Input Clocks 51
- Clock Domains 51
- Notes to Figure 4–2: 52
- Notes to Table 4–2: 52
- Reset for RapidIO IP Cores 53
- Reset Controller 54
- Clocking and Reset Structure 55
- Physical Layer 56
- Physical Layer Architecture 57
- Receiver Transceiver 58
- CRC Checking and Removal 58
- Transmitter Transceiver 59
- Physical Layer Receive Buffer 60
- Transport Layer 65
- Receiver 66
- Transaction ID Ranges 67
- Concentrator Register Module 69
- Maintenance Module 72
- Maintenance Register 74
- Maintenance Slave Processor 74
- Maintenance Master Processor 76
- Port-Write Processor 78
- Registers Location 81
- Transactions 82
- Notes to Table 4–8: 84
- Notes to Table 4–9: 85
- Note to Figure 4–22: 91
- Notes to Table 4–11: 95
- Notes to Table 4–12: 96
- Note to Table 4–13: 96
- Notes to Table 4–14: 97
- Doorbell Module Block Diagram 99
- Preserving Transaction Order 100
- Doorbell Message Generation 101
- Doorbell Message Reception 102
- Note to Figure 4–30: 103
- 29’hb4b5959 104
- CRC field is not removed 105
- Note to Table 4–15: 105
- Logical Layer Modules 106
- Protocol Violations 108
- Fatal Errors 108
- Maintenance Avalon-MM Slave 109
- Maintenance Avalon-MM Master 110
- Port-Write Reception Module 111
- Input/Output Avalon-MM Slave 111
- Input/Output Avalon-MM Master 112
- Note to Table 5–2: 115
- 5–2 Chapter 5: Signals 116
- Physical Layer Signals 116
- Multicast Event Signals 117
- Note to Table 5–6: 118
- Notes to Table 5–7: 118
- Chapter 5: Signals 5–5 119
- 5–6 Chapter 5: Signals 120
- Notes to Table 5–8: 121
- 5–8 Chapter 5: Signals 122
- Chapter 5: Signals 5–9 123
- Register-Related Signals 124
- Avalon-MM Interface Signals 124
- Chapter 5: Signals 5–11 125
- 4x variations 126
- 2x and 4x variations 126
- Chapter 5: Signals 5–13 127
- Note to Table 5–19: 128
- Notes to Table 5–20: 129
- 5–16 Chapter 5: Signals 130
- Notes to Table 5–21: 131
- 5–18 Chapter 5: Signals 132
- 6. Software Interface 133
- Physical Layer Registers 136
- Note to Table 6–10: 141
- Note to Table 6–11: 143
- Note to Table 6–12: 143
- Note to Table 6–13: 144
- Note to Table 6–14: 144
- Note to Table 6–15: 144
- Note to Table 6–16: 145
- Note to Table 6–17: 145
- Notes to Table 6–18: 146
- Notes to Table 6–19: 147
- Note to Table 6–22: 148
- Note to Table 6–23: 148
- Note to Table 6–24: 148
- Receive Maintenance Registers 149
- Transmit Port-Write Registers 150
- Receive Port-Write Registers 151
- Note to Table 6–45: 154
- Note to Table 6–51: 156
- Doorbell Message Registers 158
- Note to Table 6–63: 160
- 7. Testbenches 163
- 7–2 Chapter 7: Testbenches 164
- Chapter 7: Testbenches 7–3 165
- 7–4 Chapter 7: Testbenches 166
- SWRITE Transactions 167
- NWRITE_R Transactions 168
- NWRITE Transactions 169
- NREAD Transactions 170
- Doorbell Transactions 170
- Chapter 7: Testbenches 7–9 171
- Port-Write Transactions 172
- Chapter 7: Testbenches 7–11 173
- 7–12 Chapter 7: Testbenches 174
- 8. Qsys Design Example 175
- Running Qsys 177
- Adding the Master I/O BFM 181
- Adding the On-Chip Memory 182
- Connecting Unconnected Clocks 183
- Connecting System Components 183
- Generating the System 185
- Simulating the System 186
- A. Initialization Sequence 187
- Additional Information 193
- Info–2 Additional Information 194
- Document Revision History 194
- Additional Information Info–3 195
- Info–4 Additional Information 196
- Note to Table: 197
- Typographic Conventions 198
- Info–6 Additional Information 198
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