modules/genrams: add new memory wrapper for cheby.

CHANGELOG.rst

@@ -13,6 +13,10 @@ Unreleased
 ==========
 https://ohwr.org/project/general-cores/compare/master...proposed_master
 
+Added
+-----
+- [hdl] New memory wrapper for Cheby
+
 Fixed
 -----
 - [hdl] avoid f_log2() circular dependencies in gc_extend_pulse.

modules/genrams/Manifest.py

-
 files = [
 	"genram_pkg.vhd",
 	"memory_loader_pkg.vhd"];
 
+# Be sure 'target' is defined.
 try:
         target
 except NameError:
         target = ""
 
-if (target == "altera"):
-	modules = {"local" : ["altera", "generic", "common"]}
-elif (target == "xilinx" and syn_device[0:4].upper()=="XC6V"):
-	modules = {"local" : ["xilinx", "xilinx/virtex6", "common"]}
-elif (target == "xilinx"):
-	modules = {"local" : ["xilinx", "generic", "common"]}
+# Target specific modules.
+if target == "altera":
+	local_modules = ["altera", "generic"]
+elif target == "xilinx":
+    if syn_device[0:4].upper()=="XC6V":
+        local_modules = ["xilinx", "xilinx/virtex6"]
+    else:
+        local_modules = ["xilinx", "generic"]
 else:
-	modules = {"local" : ["generic", "common"]}
+	local_modules = ["generic"]
+
+modules = {"local" : local_modules + ["common", "cheby"]}

modules/genrams/cheby/Manifest.py

+files = [
+    "cheby_dpssram.vhd"
+]

modules/genrams/cheby/cheby_dpssram.vhd

+-------------------------------------------------------------------------------
+-- Title      : Cheby components
+-- Project    : General Cores
+-------------------------------------------------------------------------------
+-- File       : cheby_dpssram.vhd
+-- Company    : CERN
+-- Platform   : FPGA-generics
+-- Standard   : VHDL '93
+-------------------------------------------------------------------------------
+-- Copyright (c) 2020 CERN
+--
+-- Copyright and related rights are licensed under the Solderpad Hardware
+-- License, Version 0.51 (the "License") (which enables you, at your option,
+-- to treat this file as licensed under the Apache License 2.0); you may not
+-- use this file except in compliance with the License. You may obtain a copy
+-- of the License at http://solderpad.org/licenses/SHL-0.51.
+-- Unless required by applicable law or agreed to in writing, software,
+-- hardware and materials distributed under this 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.
+-------------------------------------------------------------------------------
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+--  This entity is instantiated by cheby when a dual-port RAM is used.
+--  This is just a wrapper that could be changed by users.
+--  The generics only use integers/logic to be compatible with verilog.
+
+entity cheby_dpssram is
+  generic (
+    g_data_width : natural := 32;
+    g_size       : natural := 1024;
+    g_addr_width : natural := 10;
+    g_dual_clock : std_logic := '1';
+    g_use_bwsel  : std_logic := '1');
+
+  port (
+    clk_a_i : in std_logic;
+    clk_b_i : in std_logic;
+
+    addr_a_i : in std_logic_vector(g_addr_width-1 downto 0);
+    addr_b_i : in std_logic_vector(g_addr_width-1 downto 0);
+
+    data_a_i : in std_logic_vector(g_data_width-1 downto 0);
+    data_b_i : in std_logic_vector(g_data_width-1 downto 0);
+
+    data_a_o : out std_logic_vector(g_data_width-1 downto 0);
+    data_b_o : out std_logic_vector(g_data_width-1 downto 0);
+
+    bwsel_a_i : in std_logic_vector((g_data_width+7)/8-1 downto 0);
+    bwsel_b_i : in std_logic_vector((g_data_width+7)/8-1 downto 0);
+
+    rd_a_i : in std_logic;
+    rd_b_i : in std_logic;
+
+    wr_a_i : in std_logic;
+    wr_b_i : in std_logic
+    );
+
+end cheby_dpssram;
+
+architecture syn of cheby_dpssram is
+begin
+  wrapped_dpram: entity work.generic_dpram
+    generic map (
+      g_data_width               => g_data_width,
+      g_size                     => g_size,
+      g_with_byte_enable         => g_use_bwsel = '1',
+      g_dual_clock               => g_dual_clock = '1')
+    port map (
+      rst_n_i => '1',
+      clka_i  => clk_a_i,
+      bwea_i  => bwsel_a_i,
+      wea_i   => wr_a_i,
+      aa_i    => addr_a_i,
+      da_i    => data_a_i,
+      qa_o    => data_a_o,
+      clkb_i  => clk_b_i,
+      bweb_i  => bwsel_b_i,
+      web_i   => wr_b_i,
+      ab_i    => addr_b_i,
+      db_i    => data_b_i,
+      qb_o    => data_b_o);
+end syn;