From 0b2b931a6324c03b9a38fb4926cb7e64e6ebf6f2 Mon Sep 17 00:00:00 2001
From: mindchasers <privateisland@mindchasers.com>
Date: Thu, 19 Nov 2020 22:25:59 -0500
Subject: fifos: remove specific sized fifos

---
 source/sync2_fifo.v | 141 ----------------------------------------------------
 1 file changed, 141 deletions(-)
 delete mode 100644 source/sync2_fifo.v

(limited to 'source/sync2_fifo.v')

diff --git a/source/sync2_fifo.v b/source/sync2_fifo.v
deleted file mode 100644
index 029cfce..0000000
--- a/source/sync2_fifo.v
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- *	sync2_fifo.v
- *
- *   Copyright (C) 2018, 2019 Mind Chasers 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: Multi Buffered Sync FIFO suitable for rate conversion from 1G to 100 Mbit
- *
- *
- */
-	
-
-`timescale 1ns /10ps
-
-module	sync2_fifo	#(parameter	FIFO_PTR = 12,
-					FIFO_WIDTH = 9,
-					FIFO_DEPTH = 4096 )
-(
-	input	rstn,
-	input	clk,
-	
-
-	// input
-	input	we,
-	input	[FIFO_WIDTH-1:0]	d_in,
-
-	// output
-	input 	re,
-	output	[FIFO_WIDTH-1:0]	d_out,		
-	output	empty,
-	output almost_full,
-	
-	// fifo_control
-	input reset_ptrs
-
-);
-
-`include "ethernet_params.v"
-
-
-reg	[FIFO_PTR-1:0] 	wr_ptr;
-reg	[FIFO_PTR-1:0] 	rd_ptr;
-reg [FIFO_PTR:0] bytes;			// use for size calculation below
-
-wire [FIFO_WIDTH-1:0]  d_out_0, d_out_1, d_out_internal;
-
-wire dpram0_a_clk_e, dpram1_a_clk_e;
-wire dpram0_b_clk_e, dpram1_b_clk_e;
-
-
-always @(posedge clk, negedge rstn)
-	if( !rstn )
-		wr_ptr <= 'd0;
-	else if ( reset_ptrs )
-		wr_ptr <= 'd0;
-	else if ( we )
-		wr_ptr <= wr_ptr + 1;
-		
-/* 
- * 	rd_ptr
- * 	use empty flat to make sure rd_ptr doesn't advance when empty ( error condition )
- */
-always @(posedge clk, negedge rstn)
-	if( !rstn )
-		rd_ptr <= 'd0;
-	else if ( reset_ptrs )
-		rd_ptr <= 'd0;
-	else if ( re && !empty )
-		rd_ptr <= rd_ptr + 1;
-
-assign empty = ( rd_ptr == wr_ptr ) ? 1'b1 : 1'b0;
-
-// leave room for a MTU frame
-assign almost_full = bytes > FIFO_DEPTH-MTU ? 1'b1 : 1'b0;
-
-always @(posedge clk, negedge rstn)
-	if( !rstn )
-		bytes <= 'd0;
-	else if ( wr_ptr >= rd_ptr )
-		bytes <= wr_ptr - rd_ptr;
-	else
-		bytes <= (wr_ptr - rd_ptr)+FIFO_DEPTH;
-		
-	assign dpram0_a_clk_e = ~wr_ptr[FIFO_PTR-1];
-	assign dpram1_a_clk_e = wr_ptr[FIFO_PTR-1];
-
-	assign dpram0_b_clk_e = ~rd_ptr[FIFO_PTR-1];
-	assign dpram1_b_clk_e = rd_ptr[FIFO_PTR-1];
-
-	assign d_out = dpram0_b_clk_e ? d_out_0 : d_out_1;
-
-dpram dpram_fifo0(
-	.rstn(  rstn  ),
-	.a_clk( clk ),
-	.a_clk_e( dpram0_a_clk_e ),
-	.a_we( we ),
-	.a_oe( 1'b0 ),
-	.a_addr( wr_ptr[10:0] ),
-	.a_din( d_in ),
-	.a_dout( ),
-	// port B
-	.b_clk(  clk ),
-	.b_clk_e( dpram0_b_clk_e ),
-	.b_we( 1'b0 ),
-	.b_oe( 1'b1  ),
-	.b_addr( rd_ptr[10:0]  ),
-	.b_din( 9'h0 ),
-	.b_dout( d_out_0 )
-);
-
-dpram dpram_fifo1(
-		.rstn(  rstn  ),
-		.a_clk( clk ),
-		.a_clk_e( dpram1_a_clk_e ),
-		.a_we( we ),
-		.a_oe( 1'b0 ),
-		.a_addr( wr_ptr[10:0]  ),
-		.a_din( d_in ),
-		.a_dout( ),
-		// port B
-		.b_clk(  clk ),
-		.b_clk_e( dpram1_b_clk_e ),
-		.b_we( 1'b0 ),
-		.b_oe( 1'b1  ),
-		.b_addr( rd_ptr[10:0]  ),
-		.b_din( 9'h0 ),
-		.b_dout( d_out_1 )
-	);
-
-endmodule
-- 
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