Rearrange cores.

1 files changed, 221 insertions, 0 deletions

diff --git a/i2c/rtl/novena_i2c.v b/i2c/rtl/novena_i2c.v
new file mode 100644
index 0000000..1cb47a0
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+++ b/i2c/rtl/novena_i2c.v
@@ -0,0 +1,221 @@
+//======================================================================
+//
+// novena_top.v
+// ------------
+// Top module for the Cryptech Novena FPGA framework with the I2C bus.
+//
+//
+// Author: Pavel Shatov
+// Copyright (c) 2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// - Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+//   be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module novena_top
+  (
+   // Differential input for 50 MHz general clock.
+   input wire 	       gclk_p_pin,
+   input wire 	       gclk_n_pin,
+
+   // Reset controlled by the CPU.
+   // this must be configured as input w/pullup
+   input wire 	       reset_mcu_b_pin,
+
+   // Cryptech avalanche noise board input and LED outputs
+   input wire 	       ct_noise,
+   output wire [7 : 0] ct_led,
+
+   // I2C interface
+   input wire 	       i2c_scl,
+   inout wire 	       i2c_sda,
+                       
+   // Novena utility ports
+   output wire 	       apoptosis_pin, // Hold low to not restart after config.
+   output wire 	       led_pin		// LED on edge close to the FPGA.
+   );
+
+
+   //----------------------------------------------------------------
+   // Clock Manager
+   //
+   // Clock manager is used to generate SYS_CLK from GCLK
+   // and implement the reset logic.
+   // ----------------------------------------------------------------
+   wire                 sys_clk;
+   wire                 sys_rst;
+
+   novena_clkmgr clkmgr
+     (
+      .gclk_p(gclk_p_pin),
+      .gclk_n(gclk_n_pin),
+
+      .reset_mcu_b(reset_mcu_b_pin),
+
+      .sys_clk(sys_clk),
+      .sys_rst(sys_rst)
+      );
+
+
+   //----------------------------------------------------------------
+   // I2C Interface
+   //
+   // I2C subsystem handles all data transfer to/from CPU via I2C bus.
+   //----------------------------------------------------------------
+   parameter I2C_DEVICE_ADDR    = 7'h0f;
+
+   wire [16: 0]         sys_eim_addr;
+   wire                 sys_eim_wr;
+   wire                 sys_eim_rd;
+
+   wire 		sda_pd;
+   wire 		sda_int;
+   
+   wire 		clk = sys_clk;
+   wire 		reset_n = ~sys_rst;
+
+   // Coretest connections.
+   wire 		coretest_reset_n;
+   wire 		coretest_cs;
+   wire 		coretest_we;
+   wire [15 : 0] 	coretest_address;
+   wire [31 : 0] 	coretest_write_data;
+   wire [31 : 0] 	coretest_read_data;
+
+   // I2C connections
+   wire [6:0] 		i2c_device_addr;
+   wire 		i2c_rxd_syn;
+   wire [7 : 0] 	i2c_rxd_data;
+   wire 		i2c_rxd_ack;
+   wire 		i2c_txd_syn;
+   wire [7 : 0] 	i2c_txd_data;
+   wire 		i2c_txd_ack;
+
+   IOBUF #(.DRIVE(8), .SLEW("SLOW"))
+   IOBUF_sda (
+	      .IO(i2c_sda),
+	      .I(1'b0),
+	      .T(!sda_pd),
+	      .O(sda_int)
+	      );
+
+   i2c_core i2c_core
+     (
+      .clk(clk),
+      .reset(sys_rst),
+
+      // External data interface
+      .SCL(i2c_scl),
+      .SDA(sda_int),
+      .SDA_pd(sda_pd),
+      .i2c_device_addr(i2c_device_addr),
+
+      // Internal receive interface.
+      .rxd_syn(i2c_rxd_syn),
+      .rxd_data(i2c_rxd_data),
+      .rxd_ack(i2c_rxd_ack),
+      
+      // Internal transmit interface.
+      .txd_syn(i2c_txd_syn),
+      .txd_data(i2c_txd_data),
+      .txd_ack(i2c_txd_ack)
+      );
+
+   coretest coretest
+     (
+      .clk(clk),
+      .reset_n(reset_n),
+      
+      .rx_syn(i2c_rxd_syn),
+      .rx_data(i2c_rxd_data),
+      .rx_ack(i2c_rxd_ack),
+      
+      .tx_syn(i2c_txd_syn),
+      .tx_data(i2c_txd_data),
+      .tx_ack(i2c_txd_ack),
+      
+      // Interface to the core being tested.
+      .core_reset_n(coretest_reset_n),
+      .core_cs(coretest_cs),
+      .core_we(coretest_we),
+      .core_address(coretest_address),
+      .core_write_data(coretest_write_data),
+      .core_read_data(coretest_read_data)
+      );
+
+   wire 		select = (i2c_device_addr == I2C_DEVICE_ADDR);
+   assign sys_eim_addr = { coretest_address[15:13], 1'b0, coretest_address[12:0] };
+   assign sys_eim_wr = select & coretest_cs & coretest_we;
+   assign sys_eim_rd = select & coretest_cs & ~coretest_we;
+
+
+   //----------------------------------------------------------------
+   // Core Selector
+   //
+   // This multiplexer is used to map different types of cores, such as
+   // hashes, RNGs and ciphers to different regions (segments) of memory.
+   //----------------------------------------------------------------
+   core_selector cores
+     (
+      .sys_clk(clk),
+      .sys_rst(sys_rst),
+
+      .sys_eim_addr(sys_eim_addr),
+      .sys_eim_wr(sys_eim_wr),
+      .sys_eim_rd(sys_eim_rd),
+
+      .sys_write_data(coretest_write_data),
+      .sys_read_data(coretest_read_data)
+      );  
+
+
+   //----------------------------------------------------------------
+   // Cryptech Logic
+   //
+   // Logic specific to the Cryptech use of the Novena.
+   // Currently we just hard wire the LED outputs.
+   //----------------------------------------------------------------
+   assign ct_led = {8{ct_noise}};
+
+
+   //----------------------------------------------------------------
+   // Novena Patch
+   //
+   // Patch logic to keep the Novena board happy.
+   // The apoptosis_pin pin must be kept low or the whole board
+   // (more exactly the CPU) will be reset after the FPGA has
+   // been configured.
+   //----------------------------------------------------------------
+   assign apoptosis_pin = 1'b0;
+
+   assign led_pin = 1'b1;
+
+endmodule
+
+//======================================================================
+// EOF novena_top.v
+//======================================================================