Arria V Avalon-ST Interface for PCIe Solutions User Guide

ID 683733
Date 6/03/2020
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15.6.9.2. ebfm_cfg_decode_bar Procedure

The ebfm_cfg_decode_bar procedure analyzes the information in the BAR table for the specified BAR and returns details about the BAR attributes.

Location

altpcietb_bfm_driver_rp.v

Syntax

ebfm_cfg_decode_bar(bar_table, bar_num, log2_size, is_mem, is_pref, is_64b)

Arguments

bar_table

Address of the Endpoint bar_table structure in BFM shared memory.

bar_num

BAR number to analyze.

log2_size

This argument is set by the procedure to the log base 2 of the size of the BAR. If the BAR is not enabled, this argument is set to 0.

is_mem

The procedure sets this argument to indicate if the BAR is a memory space BAR (1) or I/O Space BAR (0).

is_pref

The procedure sets this argument to indicate if the BAR is a prefetchable BAR (1) or non-prefetchable BAR (0).

is_64b

The procedure sets this argument to indicate if the BAR is a 64-bit BAR (1) or 32-bit BAR (0). This is set to 1 only for the lower numbered BAR of the pair.