[dv/alert_init] Remove ping diff pair in init
This PR removes setting ping diff pair to all 0s in alert init to avoid
collision with ping request.
Signed-off-by: Cindy Chen <chencindy@opentitan.org>
Signed-off-by: Michael Schaffner <msf@opentitan.org>
diff --git a/hw/dv/sv/alert_esc_agent/alert_receiver_driver.sv b/hw/dv/sv/alert_esc_agent/alert_receiver_driver.sv
index 38b2271..315eab2 100644
--- a/hw/dv/sv/alert_esc_agent/alert_receiver_driver.sv
+++ b/hw/dv/sv/alert_esc_agent/alert_receiver_driver.sv
@@ -187,12 +187,10 @@
`DV_SPINWAIT_EXIT(
// Drive alert init signal integrity error handshake.
repeat ($urandom_range(1, 10)) @(cfg.vif.receiver_cb);
- cfg.vif.alert_rx_int.ping_n <= 1'b0;
- wait (cfg.vif.receiver_cb.alert_tx.alert_p == cfg.vif.receiver_cb.alert_tx.alert_n);
cfg.vif.alert_rx_int.ack_n <= 1'b0;
+ wait (cfg.vif.receiver_cb.alert_tx.alert_p == cfg.vif.receiver_cb.alert_tx.alert_n);
repeat ($urandom_range(1, 10)) @(cfg.vif.receiver_cb);
cfg.vif.alert_rx_int.ack_n <= 1'b1;
- cfg.vif.alert_rx_int.ping_n <= 1'b1;
wait (cfg.vif.receiver_cb.alert_tx.alert_p != cfg.vif.receiver_cb.alert_tx.alert_n);
under_reset = 0;,
@(negedge cfg.vif.rst_n);)
diff --git a/hw/dv/sv/alert_esc_agent/alert_sender_driver.sv b/hw/dv/sv/alert_esc_agent/alert_sender_driver.sv
index c723b35..4a10bb1 100644
--- a/hw/dv/sv/alert_esc_agent/alert_sender_driver.sv
+++ b/hw/dv/sv/alert_esc_agent/alert_sender_driver.sv
@@ -242,9 +242,9 @@
fork begin
fork
begin
- wait (cfg.vif.alert_rx.ping_p == cfg.vif.alert_rx.ping_n);
+ wait (cfg.vif.alert_rx.ack_p == cfg.vif.alert_rx.ack_n);
cfg.vif.alert_tx_int.alert_n <= 1'b0;
- wait (cfg.vif.alert_rx.ping_p != cfg.vif.alert_rx.ping_n);
+ wait (cfg.vif.alert_rx.ack_p != cfg.vif.alert_rx.ack_n);
cfg.vif.alert_tx_int.alert_n <= 1'b1;
under_reset = 0;
end
