forked from Github_Repos/cvw
Renamed file missed from last commit.
This commit is contained in:
parent
ad6f7041b4
commit
b931110f2d
72
pipelined/src/generic/mem/ram2p1rwbe.sv
Normal file
72
pipelined/src/generic/mem/ram2p1rwbe.sv
Normal file
@ -0,0 +1,72 @@
|
||||
///////////////////////////////////////////
|
||||
// 2 port sram.
|
||||
//
|
||||
// Written: ross1728@gmail.com May 3, 2021
|
||||
// Two port SRAM 1 read port and 1 write port.
|
||||
// When clk rises Addr and LineWriteData are sampled.
|
||||
// Following the clk edge read data is output from the sampled Addr.
|
||||
// Write
|
||||
//
|
||||
// Purpose: Storage and read/write access to data cache data, tag valid, dirty, and replacement.
|
||||
//
|
||||
// A component of the CORE-V-WALLY configurable RISC-V project.
|
||||
//
|
||||
// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
|
||||
//
|
||||
// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
|
||||
// except in compliance with the License, or, at your option, the Apache License version 2.0. You
|
||||
// may obtain a copy of the License at
|
||||
//
|
||||
// https://solderpad.org/licenses/SHL-2.1/
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, any work 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.
|
||||
////////////////////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// WIDTH is number of bits in one "word" of the memory, DEPTH is number of such words
|
||||
|
||||
`include "wally-config.vh"
|
||||
|
||||
module ram2p1r1wbe #(parameter DEPTH=128, WIDTH=256) (
|
||||
input logic clk,
|
||||
input logic ce1, ce2,
|
||||
input logic [$clog2(DEPTH)-1:0] ra1,
|
||||
input logic [WIDTH-1:0] wd2,
|
||||
input logic [$clog2(DEPTH)-1:0] wa2,
|
||||
input logic we2,
|
||||
input logic [(WIDTH-1)/8:0] bwe2,
|
||||
output logic [WIDTH-1:0] rd1
|
||||
);
|
||||
|
||||
logic [WIDTH-1:0] mem[DEPTH-1:0];
|
||||
|
||||
// ***************************************************************************
|
||||
// TRUE Smem macro
|
||||
// ***************************************************************************
|
||||
|
||||
// ***************************************************************************
|
||||
// READ first SRAM model
|
||||
// ***************************************************************************
|
||||
integer i;
|
||||
|
||||
// Read
|
||||
always_ff @(posedge clk)
|
||||
if(ce1) rd1 <= #1 mem[ra1];
|
||||
|
||||
// Write divided into part for bytes and part for extra msbs
|
||||
if(WIDTH >= 8)
|
||||
always @(posedge clk)
|
||||
if (ce2 & we2)
|
||||
for(i = 0; i < WIDTH/8; i++)
|
||||
if(bwe2[i]) mem[wa2][i*8 +: 8] <= #1 wd2[i*8 +: 8];
|
||||
|
||||
if (WIDTH%8 != 0) // handle msbs if width not a multiple of 8
|
||||
always @(posedge clk)
|
||||
if (ce2 & we2 & bwe2[WIDTH/8])
|
||||
mem[wa2][WIDTH-1:WIDTH-WIDTH%8] <= #1 wd2[WIDTH-1:WIDTH-WIDTH%8];
|
||||
|
||||
endmodule
|
Loading…
Reference in New Issue
Block a user