Axi4 assertion configuration, Vhdl monitor api – Altera Mentor Verification IP Altera Edition AMBA AXI3/4TM User Manual
Page 511
VHDL AXI3 and AXI4 Monitor BFMs
VHDL Monitor API
Mentor VIP AE AXI3/4 User Guide, V10.2b
491
September 2013
AXI4 Assertion Configuration
By default, all built-in assertions are enabled in the monitor BFM. To globally disable them in
the monitor BFM, use the
command as the following example illustrates:
set_config(AXI4_CONFIG_ENABLE_ALL_ASSERTIONS,0,bfm_index,
axi4_tr_if_0(bfm_index));
Alternatively, you a disable individual built-in assertions by using a sequence of
and
commands on the respective assertion. For example, to disable assertion
checking for the AWLOCK signal changing between the AWVALID and AWREADY handshake
signals, use the following sequence of commands:
-- Define a local bit vector to hold the value of the assertion bit vector
variable config_assert_bitvector : std_logic_vector(AXI4_MAX_BIT_SIZE-1
downto 0);
-- Get the current value of the assertion bit vector
get_config(AXI4_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,
bfm_index, axi4_tr_if_0(bfm_index));
-- Assign the AXI4_LOCK_CHANGED_BEFORE_AWREADY assertion bit to 0
config_assert_bitvector(AXI4_LOCK_CHANGED_BEFORE_AWREADY) := ‘0’;
-- Set the new value of the assertion bit vector
set_config(AXI4_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,
bfm_index, axi4_tr_if_0(bfm_index));
Note
Do not confuse the AXI4_CONFIG_ENABLE_ASSERTION bit vector with the
AXI4_CONFIG_ENABLE_ALL_ASSERTIONS global enable/disable.
To re-enable the AXI4_LOCK_CHANGED_BEFORE_AWREADY assertion, following the
above code sequence, assign the assertion in the AXI4_CONFIG_ENABLE_ASSERTION bit
vector to 1.
For a complete listing of assertions, refer to
VHDL Monitor API
This section describes the VHDL Monitor API.