Altera Arria V Hard IP for PCI Express - Manual (Page 256)

17–34 Chapter 17: Testbench and Design Example
BFM Procedures and Functions
Arria V Hard IP for PCI Express December 2013 Altera Corporation
User Guide
BFM Configuration Procedures
The following procedures are available in altpcietb_bfm_driver_rp.v. These
procedures support configuration of the Root Port and Endpoint Configuration Space
registers.
All Verilog HDL arguments are type integer and are input-only unless specified
otherwise.
ebfm_cfg_rp_ep Procedure
The ebfm_cfg_rp_ep procedure configures the Root Port and Endpoint Configuration
Space registers for operation. Refer to Table 17–28 for a description the arguments for
this procedure.
Table 17–28. ebfm_cfg_rp_ep Procedure
Location altpcietb_bfm_driver_rp.v
Syntax
ebfm_cfg_rp_ep(bar_table, ep_bus_num, ep_dev_num, rp_max_rd_req_size,
display_ep_config, addr_map_4GB_limit)
Arguments bar_table
Address of the Endpoint bar_table structure in BFM shared memory. This
routine populates the bar_table structure. The bar_table structure stores
the size of each BAR and the address values assigned to each BAR. The address
of the
bar_table structure is passed to all subsequent read and write
procedure calls that access an offset from a particular BAR.
ep_bus_num
PCI Express bus number of the target device. This number can be any value
greater than 0. The Root Port uses this as its secondary bus number.
ep_dev_num
PCI Express device number of the target device. This number can be any value.
The Endpoint is automatically assigned this value when it receives its first
configuration transaction.
rp_max_rd_req_size
Maximum read request size in bytes for reads issued by the Root Port. This
parameter must be set to the maximum value supported by the Endpoint
Application Layer. If the Application Layer only supports reads of the
MAXIMUM_PAYLOAD_SIZE , then this can be set to 0 and the read request size
will be set to the maximum payload size. Valid values for this argument are 0,
128, 256, 512, 1,024, 2,048 and 4,096.
display_ep_config
When set to 1 many of the Endpoint Configuration Space registers are displayed
after they have been initialized, causing some additional reads of registers that
are not normally accessed during the configuration process such as the Device
ID and Vendor ID.
addr_map_4GB_limit
When set to 1 the address map of the simulation system will be limited to 4
GBytes. Any 64-bit BARs will be assigned below the 4 GByte limit.