Datasets:
File size: 2,124 Bytes
d39fee6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | // Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
//
// This module gates the alert triggers with their enable bits, and correctly bins
// the enabled alerts into the class that they have been assigned to. The module
// produces the alert cause and class trigger signals.
//
module alert_handler_class import alert_handler_pkg::*; (
input [NAlerts-1:0] alert_trig_i, // alert trigger
input [N_LOC_ALERT-1:0] loc_alert_trig_i, // alert trigger
input [NAlerts-1:0] alert_en_i, // alert enable
input [N_LOC_ALERT-1:0] loc_alert_en_i, // alert enable
input [NAlerts-1:0] [CLASS_DW-1:0] alert_class_i, // class assignment
input [N_LOC_ALERT-1:0][CLASS_DW-1:0] loc_alert_class_i, // class assignment
output logic [NAlerts-1:0] alert_cause_o, // alert cause
output logic [N_LOC_ALERT-1:0] loc_alert_cause_o, // alert cause
output logic [N_CLASSES-1:0] class_trig_o // class triggered
);
// assign alert cause
assign alert_cause_o = alert_en_i & alert_trig_i;
assign loc_alert_cause_o = loc_alert_en_i & loc_alert_trig_i;
// classification mapping
logic [N_CLASSES-1:0][NAlerts-1:0] class_masks;
logic [N_CLASSES-1:0][N_LOC_ALERT-1:0] loc_class_masks;
// this is basically an address to onehot0 decoder
always_comb begin : p_class_mask
class_masks = '0;
loc_class_masks = '0;
for (int unsigned kk = 0; kk < NAlerts; kk++) begin
class_masks[alert_class_i[kk]][kk] = 1'b1;
end
for (int unsigned kk = 0; kk < N_LOC_ALERT; kk++) begin
loc_class_masks[loc_alert_class_i[kk]][kk] = 1'b1;
end
end
// mask and OR reduction, followed by class enable gating
for (genvar k = 0; k < N_CLASSES; k++) begin : gen_classifier
assign class_trig_o[k] = (|{ alert_cause_o & class_masks[k],
loc_alert_cause_o & loc_class_masks[k] });
end
endmodule : alert_handler_class
|