Altera IP Compiler for PCI Express - Manual (Page 283)

Chapter 15: Testbench and Design Example 15–51
BFM Procedures and Functions
August 2014 Altera Corporation IP Compiler for PCI Express User Guide
Procedures and Functions Specific to the Chaining DMA Design Example
This section describes procedures that are specific to the chaining DMA design
example. These procedures are located in the VHDL entity file
altpcietb_bfm_driver_chaining.vhd
or the Verilog HDL module file
altpcietb_bfm_driver_chaining.v .
chained_dma_test Procedure
The chained_dma_test procedure is the top-level procedure that runs the chaining
DMA read and the chaining DMA write
dma_rd_test Procedure
Use the dma_rd_test procedure for DMA reads from the endpoint memory to the
BFM shared memory.
Argument range vec Input data type reg with a range of 31:0.
Return range string
Returns a 7-digit decimal representation of the input argument that is padded with
leading 0s if necessary. Return data is type reg with a range of 56:1.
Returns the letter <U> if the value cannot be represented.
Table 15–59. dimage7
Table 15–60. chained_dma_test Procedure
Location altpcietb_bfm_driver_chaining.v or altpcietb_bfm_driver_chaining.vhd
Syntax chained_dma_test (bar_table, bar_num, direction, use_msi, use_eplast)
Arguments
bar_table Address of the endpoint bar_table structure in BFM shared memory.
bar_num BAR number to analyze.
direction
When 0 the direction is read.
When 1 the direction is write.
Use_msi When set, the root port uses native PCI Express MSI to detect the DMA completion.
Use_eplast When set, the root port uses BFM shared memory polling to detect the DMA completion.
Table 15–61. dma_rd_test Procedure
Location altpcietb_bfm_driver_chaining.v or altpcietb_bfm_driver_chaining.vhd
Syntax dma_rd_test (bar_table, bar_num, use_msi, use_eplast)
Arguments
bar_table Address of the endpoint bar_table structure in BFM shared memory.
bar_num BAR number to analyze.
Use_msi When set, the root port uses native PCI express MSI to detect the DMA completion.
Use_eplast When set, the root port uses BFM shared memory polling to detect the DMA completion.