Change "rosc" references to "trng"

doc/system_description/fpga.md

@@ -107,9 +107,9 @@ The UART contain a 512 but Rx-FIFO with status (data available).
 The timer is available to use by firmware and applications.
 
 
-#### ROSC
+#### TRNG
 
-The ROSC is a ring oscillator based internal entropy source, or
+The TRNG is a ring oscillator based internal entropy source, or
 True Random Number Generator (TRNG). By default the TRNG use 32
 free running digital oscillators. By default, the oscillators are
 sampled after 4096 cycles. The states are XOR combined to create
@@ -126,10 +126,10 @@ been added.
 If a data word has been read from the TRNG, by default at least
 32 bits will collected before new data will be available.
 
-The ROSC TRNG is available to use by firmware and applications.
+The TRNG is available to use by firmware and applications.
 
-Note: The ROSC generates entropy with a fairly good quality.
-However for security related use cases, for example keys, the ROSC
+Note: The TRNG generates entropy with a fairly good quality.
+However for security related use cases, for example keys, the TRNG
 should not be used directly. Instead use it to create a seed
 for a Digital Random Bit Generator (DRBG), also known as a
 Cryptographically Safe Pseudo Random Number Generator (CSPRNG).

hw/application_fpga/core/trng/rtl/trng.v

@@ -1,6 +1,6 @@
 //======================================================================
 //
-// rosc.v
+// trng.v
 // ------
 // Digital ring oscillator based entropy generator.
 // Use this as a source of entropy, for example as seeds.
@@ -16,7 +16,7 @@
 
 `default_nettype none
 
-module rosc (
+module trng (
     input wire clk,
     input wire reset_n,
 
@@ -78,9 +78,9 @@ module rosc (
   reg                       data_ready_new;
   reg                       data_ready_we;
 
-  reg  [             1 : 0] rosc_ctrl_reg;
-  reg  [             1 : 0] rosc_ctrl_new;
-  reg                       rosc_ctrl_we;
+  reg  [             1 : 0] trng_ctrl_reg;
+  reg  [             1 : 0] trng_ctrl_new;
+  reg                       trng_ctrl_we;
 
   //----------------------------------------------------------------
   // Wires.
@@ -145,7 +145,7 @@ module rosc (
       sample2_reg    <= 2'h0;
       entropy_reg    <= 32'h0;
       data_ready_reg <= 1'h0;
-      rosc_ctrl_reg  <= CTRL_SAMPLE1;
+      trng_ctrl_reg  <= CTRL_SAMPLE1;
     end
 
     else begin
@@ -171,8 +171,8 @@ module rosc (
         data_ready_reg <= data_ready_new;
       end
 
-      if (rosc_ctrl_we) begin
-        rosc_ctrl_reg <= rosc_ctrl_new;
+      if (trng_ctrl_we) begin
+        trng_ctrl_reg <= trng_ctrl_new;
       end
     end
   end
@@ -250,9 +250,9 @@ module rosc (
 
 
   //----------------------------------------------------------------
-  // rosc_ctrl_logic
+  // trng_ctrl_logic
   //----------------------------------------------------------------
-  always @* begin : rosc_ctrl_logic
+  always @* begin : trng_ctrl_logic
     reg xor_f;
     reg xor_g;
     reg xor_sample1;
@@ -263,8 +263,8 @@ module rosc (
     entropy_we    = 1'h0;
     cycle_ctr_rst = 1'h0;
     bit_ctr_inc   = 1'h0;
-    rosc_ctrl_new = CTRL_SAMPLE1;
-    rosc_ctrl_we  = 1'h0;
+    trng_ctrl_new = CTRL_SAMPLE1;
+    trng_ctrl_we  = 1'h0;
 
     xor_f         = ^f;
     xor_g         = ^g;
@@ -275,14 +275,14 @@ module rosc (
     sample2_new   = {sample2_reg[0], xor_g};
     entropy_new   = {entropy_reg[30 : 0], xor_sample1 ^ xor_sample2};
 
-    case (rosc_ctrl_reg)
+    case (trng_ctrl_reg)
       CTRL_SAMPLE1: begin
         if (cycle_ctr_done) begin
           cycle_ctr_rst = 1'h1;
           sample1_we    = 1'h1;
           sample2_we    = 1'h1;
-          rosc_ctrl_new = CTRL_SAMPLE2;
-          rosc_ctrl_we  = 1'h1;
+          trng_ctrl_new = CTRL_SAMPLE2;
+          trng_ctrl_we  = 1'h1;
         end
       end
 
@@ -291,25 +291,25 @@ module rosc (
           cycle_ctr_rst = 1'h1;
           sample1_we    = 1'h1;
           sample2_we    = 1'h1;
-          rosc_ctrl_new = CTRL_DATA_READY;
-          rosc_ctrl_we  = 1'h1;
+          trng_ctrl_new = CTRL_DATA_READY;
+          trng_ctrl_we  = 1'h1;
         end
       end
 
       CTRL_DATA_READY: begin
         entropy_we    = 1'h1;
         bit_ctr_inc   = 1'h1;
-        rosc_ctrl_new = CTRL_SAMPLE1;
-        rosc_ctrl_we  = 1'h1;
+        trng_ctrl_new = CTRL_SAMPLE1;
+        trng_ctrl_we  = 1'h1;
       end
 
       default: begin
       end
-    endcase  // case (rosc_ctrl_reg)
+    endcase  // case (trng_ctrl_reg)
   end
 
-endmodule  // rosc
+endmodule  // trng
 
 //======================================================================
-// EOF rosc.v
+// EOF trng.v
 //======================================================================

hw/application_fpga/core/trng/tb/tb_trng.v

@@ -50,7 +50,7 @@ module tb_trng ();
   //----------------------------------------------------------------
   // Device Under Test.
   //----------------------------------------------------------------
-  rosc dut (
+  trng dut (
       .clk(tb_clk),
       .reset_n(tb_reset_n),
 

hw/application_fpga/rtl/application_fpga.v

@@ -248,7 +248,7 @@ module application_fpga (
   );
 
 
-  rosc trng_inst (
+  trng trng_inst (
       .clk(clk),
       .reset_n(reset_n),
       .cs(trng_cs),