Set up tdpram

lambdalib/ramlib/__init__.py

@@ -4,11 +4,13 @@
 from .la_syncfifo.la_syncfifo import Syncfifo
 from .la_dpram.la_dpram import Dpram
 from .la_spram.la_spram import Spram
+from .la_tdpram.la_tdpram import Tdpram
 
 __all__ = ['Asyncfifo',
            'Syncfifo',
            'Dpram',
-           'Spram']
+           'Spram',
+           'Tdpram']
 
 
 class RAMLib(Design):
@@ -20,3 +22,4 @@ def __init__(self):
             self.add_depfileset(Syncfifo(), depfileset="rtl")
             self.add_depfileset(Dpram(), depfileset="rtl")
             self.add_depfileset(Spram(), depfileset="rtl")
+            self.add_depfileset(Tdpram(), depfileset="rtl")

lambdalib/ramlib/la_tdpram/la_tdpram.py

@@ -0,0 +1,12 @@
+from lambdalib.lambdalib import Lambda
+
+
+class Tdpram(Lambda):
+    def __init__(self):
+        name = 'la_tdpram'
+        super().__init__(name, __file__, extrasources=['rtl/la_tdpram_impl.v'])
+
+
+if __name__ == "__main__":
+    d = Tdpram()
+    d.write_fileset(f"{d.name}.f", fileset="rtl")

lambdalib/ramlib/la_tdpram/rtl/la_tdpram.v

@@ -0,0 +1,85 @@
+/*****************************************************************************
+ * Function:
+ * Copyright: Lambda Project Authors. All rights Reserved.
+ * License:  MIT (see LICENSE file in Lambda repository)
+ *
+ * Docs:
+ *
+ * This is a wrapper for selecting from a set of hardened memory macros.
+ *
+ * A synthesizable reference model is used when the PROP is DEFAULT. The
+ * synthesizable model does not implement the cfg and test interface and should
+ * only be used for basic testing and for synthesizing for FPGA devices.
+ * Advanced ASIC development should rely on complete functional models
+ * supplied on a per macro basis.
+ *
+ * Technology specific implementations of "la_tdpram" would generally include
+ * one or more hardcoded instantiations of RAM modules with a generate
+ * statement relying on the "PROP" to select between the list of modules
+ * at build time.
+ *
+ ****************************************************************************/
+
+module la_tdpram #(
+    parameter DW    = 32,         // Memory width
+    parameter AW    = 10,         // address width (derived)
+    parameter PROP  = "DEFAULT",  // pass through variable for hard macro
+    parameter CTRLW = 128,        // width of asic ctrl interface
+    parameter TESTW = 128         // width of asic test interface
+) (  // A port
+    input             clk_a,      // write clock
+    input             ce_a,       // write chip-enable
+    input             we_a,       // write enable
+    input [DW-1:0]    wmask_a,    // write mask
+    input [AW-1:0]    addr_a,     // write address
+    input [DW-1:0]    din_a,      // write data in
+    output [DW-1:0]   dout_a,     // read data out
+    // B port
+    input             clk_b,      // write clock
+    input             ce_b,       // write chip-enable
+    input             we_b,       // write enable
+    input [DW-1:0]    wmask_b,    // write mask
+    input [AW-1:0]    addr_b,     // write address
+    input [DW-1:0]    din_b,      // write data in
+    output [DW-1:0]   dout_b,     // read data out
+    // Power signal
+    input             vss,        // ground signal
+    input             vdd,        // memory core array power
+    input             vddio,      // periphery/io power
+    // Generic interfaces
+    input [CTRLW-1:0] ctrl,       // pass through ASIC control interface
+    input [TESTW-1:0] test        // pass through ASIC test interface
+);
+
+    la_tdpram_impl #(
+        .DW         (DW),
+        .AW         (AW),
+        .PROP       (PROP),
+        .CTRLW      (CTRLW),
+        .TESTW      (TESTW)
+    ) memory (
+        .clk_a      (clk_a),
+        .ce_a       (ce_a),
+        .we_a       (we_a),
+        .wmask_a    (wmask_a),
+        .addr_a     (addr_a),
+        .din_a      (din_a),
+        .dout_a     (dout_a),
+
+        .clk_b      (clk_b),
+        .ce_b       (ce_b),
+        .we_b       (we_b),
+        .wmask_b    (wmask_b),
+        .addr_b     (addr_b),
+        .din_b      (din_b),
+        .dout_b     (dout_b),
+
+        .vss        (vss),
+        .vdd        (vdd),
+        .vddio      (vddio),
+
+        .ctrl       (ctrl),
+        .test       (test)
+    );
+
+endmodule

lambdalib/ramlib/la_tdpram/rtl/la_tdpram_impl.v

@@ -0,0 +1,93 @@
+/*****************************************************************************
+ * Function: True Dual Port RAM (Two write + read ports)
+ * Copyright: Lambda Project Authors. All rights Reserved.
+ * License:  MIT (see LICENSE file in Lambda repository)
+ *
+ * Docs:
+ *
+ * This is a wrapper for selecting from a set of hardened memory macros.
+ *
+ * A synthesizable reference model is used when the PROP is DEFAULT. The
+ * synthesizable model does not implement the cfg and test interface and should
+ * only be used for basic testing and for synthesizing for FPGA devices.
+ * Advanced ASIC development should rely on complete functional models
+ * supplied on a per macro basis.
+ *
+ * Technology specific implementations of "la_tdpram" would generally include
+ * one or more hardcoded instantiations of RAM modules with a generate
+ * statement relying on the "PROP" to select between the list of modules
+ * at build time.
+ *
+ ****************************************************************************/
+
+module la_tdpram_impl #(
+    parameter DW    = 32,         // Memory width
+    parameter AW    = 10,         // address width (derived)
+    parameter PROP  = "DEFAULT",  // pass through variable for hard macro
+    parameter CTRLW = 128,        // width of asic ctrl interface
+    parameter TESTW = 128         // width of asic test interface
+) (  // Write port
+    input               clk_a,    // write clock
+    input               ce_a,     // write chip-enable
+    input               we_a,     // write enable
+    input [DW-1:0]      wmask_a,  // write mask
+    input [AW-1:0]      addr_a,   // write address
+    input [DW-1:0]      din_a,    // write data in
+    output reg [DW-1:0] dout_a,   // read data out
+    // B port
+    input               clk_b,    // write clock
+    input               ce_b,     // write chip-enable
+    input               we_b,     // write enable
+    input [DW-1:0]      wmask_b,  // write mask
+    input [AW-1:0]      addr_b,   // write address
+    input [DW-1:0]      din_b,    // write data in
+    output reg [DW-1:0] dout_b,   // read data out
+    // Power signal
+    input               vss,      // ground signal
+    input               vdd,      // memory core array power
+    input               vddio,    // periphery/io power
+    // Generic interfaces
+    input [CTRLW-1:0]   ctrl,     // pass through ASIC control interface
+    input [TESTW-1:0]   test      // pass through ASIC test interface
+);
+
+    // Generic RTL RAM
+   /* verilator lint_off MULTIDRIVEN */
+   reg [DW-1:0]       ram[(2**AW)-1:0];
+   /* verilator lint_on MULTIDRIVEN */
+
+   integer            i;
+
+   // Port A write
+   always @(posedge clk_a) begin
+      for (i = 0; i < DW; i = i + 1) begin
+         if (ce_a && we_a && wmask_a[i]) begin
+            ram[addr_a][i] <= din_a[i];
+         end
+      end
+   end
+
+   // Port B write
+   always @(posedge clk_b) begin
+      for (i = 0; i < DW; i = i + 1) begin
+         if (ce_b && we_b && wmask_b[i]) begin
+            ram[addr_b][i] <= din_b[i];
+         end
+      end
+   end
+
+   // Port A read
+   always @(posedge clk_a) begin
+      if (ce_a && ~we_a) begin
+         dout_a <= ram[addr_a];
+      end
+   end
+
+   // Port B read
+   always @(posedge clk_b) begin
+      if (ce_b && ~we_b) begin
+         dout_b <= ram[addr_b];
+      end
+   end
+
+endmodule