Altera Mentor Verification IP Altera Edition AMBA AXI4-Lite - Manual (Page 273)

VHDL Slave BFM
Helper Functions
Mentor Verification IP AE AXI4-Lite User Guide, V10.3 273
April 2014
Helper Functions
AMBA AXI protocols typically provide a start address only in a transaction, with the following
addresses for each byte of a data calculated. Helper functions provide you with a simple
interface to set and get actual address/data values.
get_write_addr_data()
This nonblocking procedure returns the actual address addr and data of a particular byte in a
write data beat. It also returns the maximum number of bytes (dynamic_size) in the write data
phase (beat). It is used in a slave test program as a helper procedure to store a byte of data at a
particular address in the slave memory.
Prototype procedure get_write_addr_data
(
transaction_id : in integer;
byte_index : in integer;
dynamic_size : out integer;
addr : out std_logic_vector(AXI4_MAX_BIT_SIZE-1
downto 0);
data : out std_logic_vector(7 downto 0);
bfm_id : in integer;
path_id : in axi4_path_t; --optional
signal tr_if : inout axi4_vhd_if_struct_t
);
Arguments transaction_id Transaction identifier. Refer to “ Overloaded Procedure
Common Arguments ” on page 151 for more details.
byte_index Data byte number in a data phase (beat)
dynamic_size Number of data bytes in a data phase (beat).
addr Data byte address.
data Write data byte.
bfm_id BFM identifier. Refer to “ Overloaded Procedure Common
Arguments ” on page 151 for more details.
path_id (Optional) Parallel process path identifier:
AXI4_PATH_0
AXI4_PATH_1
AXI4_PATH_2
AXI4_PATH_3
AXI4_PATH_4
Refer to “ Overloaded Procedure Common Arguments ” on
page 151 for more details.
tr_if Transaction signal interface. Refer to “ Overloaded Procedure
Common Arguments ” on page 151 for more details.