16–48
Chapter 16: Testbench and Design Example
BFM Procedures and Functions
Arria V GZ Hard IP for PCI Express
November 2012
Altera Corporation
find_mem_bar Procedure
The
find_mem_bar
procedure locates a BAR which satisfies a given memory space
requirement.
dma_set_rclast Procedure
The
dma_set_rclast
procedure starts the DMA operation by writing to the Endpoint
DMA register the value of the last descriptor to process (RCLast).
ebfm_display_verb Procedure
The
ebfm_display_verb
procedure calls the procedure
ebfm_display
when the global
variable
DISPLAY_ALL
is set to 1.
Table 16–64.
find_mem_bar Procedure
Location
altpcietb_bfm_driver_rp.v
Syntax
Find_mem_bar(bar_table,allowed_bars,min_log2_size, sel_bar)
Arguments
bar_table
Address of the Endpoint
bar_table
structure in BFM shared memory
allowed_bars
One hot 6 bits BAR selection
min_log2_size
Number of bit required for the specified address space
sel_bar
BAR number to use
Table 16–65.
dma_set_rclast Procedure
Location
altpcietb_bfm_driver_rp.v
Syntax
Dma_set_rclast(bar_table, setup_bar, dt_direction, dt_rclast)
Arguments
bar_table
Address of the Endpoint
bar_table
structure in BFM shared memory
setup_bar
BAR number to use
dt_direction
When 0 read, When 1 write
dt_rclast
Last descriptor number
Table 16–66.
ebfm_display_verb Procedure
Location
altpcietb_bfm_driver_chaining.v
Syntax
ebfm_display_verb(msg_type, message)
Arguments
msg_type
Message type for the message. Should be one of the constants
defined in
message
The message string is limited to a maximum of 100 characters. Also, because
Verilog HDL does not allow variable length strings, this routine strips off leading
characters of 8'h00 before displaying the message.