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diff --git a/src/rgmii_params.v b/src/rgmii_params.v
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+/*
+ *   rgmii_params.v
+ *
+ *	 Copyright 2025 Private Island Networks Inc.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *
+ *	function: RGMII Related Parameters
+ *
+ */
+ 
+`ifdef INCLUDED
+	
+	// PHY Status Params (Table 4)
+	localparam LINK_UP = 4'b0001,
+	LINK_DOWN = 4'b0000;
+	
+	localparam CLOCK_SPEED_2_5 = 4'b0000,
+	CLOCK_SPEED_25 = 4'b0010,
+	CLOCK_SPEED_125 = 4'b0100,
+	CLOCK_SPEED_RSVD = 4'b0110;
+	
+	localparam FULL_DUPLEX = 4'b1000,
+	HALF_DUPLEX = 4'b0000;
+	
+	localparam D_IDLE = FULL_DUPLEX | CLOCK_SPEED_125 | LINK_UP;
+
+	
+	// RGMII CTL Bits
+	localparam 	NORMAL_INTERFRAME = 2'b00,
+	CARRIER_STATUS = 2'b01,
+	ERROR_DATA_RX = 2'b10,
+	NORMAL_DATA_RX = 2'b11;
+	
+	
+`endif