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Mentor VIP AE AXI3/4 User Guide, V10.2b
176
SystemVerilog Tutorials
Verifying a Master DUT
September 2013
initial block
In an initial block, the slave test program configures the maximum number of outstanding read
and write transactions before waiting for the ARESETn signal to be deactivated. The following
positive edge of ACLK starts the processing of any read or write transactions, and the handling
of the channel *READY signals in a fork-join block, as shown in Example 6-42 below.
Example 6-42. Initialization and Transaction Processing
initial
begin
// Initialisation
bfm.set_config
(
AXI4_CONFIG_MAX_OUTSTANDING_RD,m_max_outstanding_read_trans
);
bfm.set_config
(
AXI4_CONFIG_MAX_OUTSTANDING_WR,m_max_outstanding_write_trans
);
bfm.wait_on(AXI4_RESET_0_TO_1);
bfm.wait_on(AXI4_CLOCK_POSEDGE);
// Traffic generation
fork
process_read;
process_write;
handle_write_addr_ready;
handle_read_addr_ready;
handle_write_data_ready;
join
end
process_read()
The process_read() task loops forever, processing read transactions as they occur from the
master. A local transaction variable read_trans of type axi4_transaction is defined to hold a
record of the read transaction while it is being processed. A slave transaction is created by
calling the create_slave_transaction() function and assigned to the read_trans record.
The subsequent fork-join_none block performs a nonblocking statement so that the
process_read() task can begin again to create another read transaction record and get another
read address phase before the current read transaction has completed. This permits concurrent
read transactions to occur if the master issues a series of read address phases before any
previous read transactions have completed.
- Verification IP Altera 1
- Edition 1
- AMBA AXI3/4 1
- User Guide 1
- Table of Contents 10
- List of Examples 13
- List of Figures 16
- List of Tables 17
- About This User Guide 19
- Protocol Restrictions 19
- Supported Simulators 20
- Simulator GCC Requirements 21
- Chapter 1 23
- Mentor VIP Altera Edition 23
- What Is a Transaction? 24
- An AXI Transaction 24
- Chapter 2 31
- SystemVerilog API Overview 31
- Transaction Record 33
- Table 2-1. Transaction Fields 35
- AXI3 BFM Delay Mode 48
- Chapter 3 51
- SystemVerilog Master API 57
- Chapter 4 87
- SystemVerilog Slave API 93
- Operational 100
- Transaction 100
- AXI3 Example 101
- AXI4 Example 101
- September 2013 107
- AXI3 BFM 109
- Helper Functions 118
- Chapter 5 121
- Monitor BFM Protocol Support 122
- Monitor Timing and Events 122
- Monitor BFM Configuration 122
- Timing Variables 124
- Slave Attributes 125
- Error Detection 125
- Monitor Assertions 126
- SystemVerilog Monitor API 127
- Prototype 128
- Arguments 128
- Arguments config_name 130
- (AXI4) Configuration name: 130
- Chapter 6 155
- SystemVerilog Tutorials 155
- AXI3 BFM Master Test Program 156
- AXI4 BFM Master Test Program 161
- Verifying a Slave DUT 162
- Verifying a Master DUT 173
- Example 6-30. process_write 184
- Example 6-31. handle_write 185
- AXI4 BFM Slave Test Program 186
- Internal Memory 187
- Example 6-44. handle_read 197
- Example 6-45. process_write 198
- Chapter 7 203
- VHDL API Overview 203
- Test Program VHDL 204
- VHDL to SV Wrapper 204
- Configuration 205
- Creating Transactions 206
- AXI4 Transaction Definition 207
- Table 7-1. Transaction Fields 209
- Transaction Field Description 209
- Protocol Transaction Fields 209
- Executing Transactions 212
- Waiting Events 213
- Access Transaction Record 214
- Operation Mode 216
- Channel Handshake Delay 217
- AXI4 BFM Handshake Delay 218
- Data Beat Done 220
- Transaction Done 220
- Chapter 8 221
- Master BFM Protocol Support 222
- Master Timing and Events 222
- Master BFM Configuration 222
- Master Assertions 225
- AXI4 Assertion Configuration 226
- VHDL Master API 227
- Protocol 233
- Arguments cache 255
- AXI4 BFM 297
- Chapter 9 365
- VHDL AXI3 and AXI4 Slave BFMs 365
- Slave BFM Configuration 366
- Slave Assertions 369
- AXI3 Assertion Configuration 370
- VHDL Slave API 371
- Returns transaction_id 378
- Chapter 10 505
- VHDL Monitor API 511
- Chapter 11 627
- VHDL Tutorials 627
- Example 11-29. handle read 656
- Example 11-38. process_write 668
- Chapter 12 673
- Running the Qsys Tool 676
- Running Simulation 679
- Example Script Processing 682
- Appendix A 685
- Assertions 685
- AXI4 Assertions 698
- Appendix B 715
- Programs 715
- Appendix C 751
- End-User License Agreement 779
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