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diff --git a/core_selector/src/rtl/core_selector.v b/core_selector/src/rtl/core_selector.v
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-//======================================================================
-//
-// core_selector.v
-// ---------------
-// Top level wrapper that creates the Cryptech coretest system.
-// The wrapper contains instances of external interface, coretest
-// and the core to be tested. And if more than one core is
-// present the wrapper also includes address and data muxes.
-//
-//
-// Author: Pavel Shatov
-// Copyright (c) 2014-2015, 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 core_selector
- (
- input wire sys_clk,
- input wire sys_rst_n,
-
- input wire [16: 0] sys_eim_addr,
- input wire sys_eim_wr,
- input wire sys_eim_rd,
- output wire [31: 0] sys_read_data,
- input wire [31: 0] sys_write_data,
- output wire sys_error,
-
- input wire noise,
- output wire [7 : 0] debug
- );
-
-
- /* Three upper bits of address [16:14] are used to select memory segment.
- * There can be eight segments. So far segment 0 is used for global
- * registers, segment 1 is used for hashes, segment 2 is reserved for
- * random number generators, segment 3 is reserved for chiphers. Other
- * segments are not used so far.
- */
-
- /* Every segment has its own memory map, take at look at corresponding
- * selectors for more information.
- */
-
- //----------------------------------------------------------------
- // Address Decoder
- //----------------------------------------------------------------
- // 3 upper bits are decoded here
- wire [ 2: 0] addr_segment = sys_eim_addr[16:14];
- // 14 lower bits are decoded in corresponding segment selectors
- wire [13: 0] addr_segment_int = sys_eim_addr[13: 0];
-
-
- //----------------------------------------------------------------
- // List of Available Segments
- //----------------------------------------------------------------
- // Comment following lines to exclude segments from implementation.
- `define USE_SEGMENT_GLOBALS
- `define USE_SEGMENT_HASHES
- `define USE_SEGMENT_RNGS
- `define USE_SEGMENT_CIPHERS
- `define USE_SEGMENT_MATH
-
-
- //----------------------------------------------------------------
- // Segment Address Table
- //----------------------------------------------------------------
- localparam SEGMENT_ADDR_GLOBALS = 3'd0;
- localparam SEGMENT_ADDR_HASHES = 3'd1;
- localparam SEGMENT_ADDR_RNGS = 3'd2;
- localparam SEGMENT_ADDR_CIPHERS = 3'd3;
- localparam SEGMENT_ADDR_MATH = 3'd4;
-
-
- //----------------------------------------------------------------
- // GLOBALS Segment
- //----------------------------------------------------------------
- `ifdef USE_SEGMENT_GLOBALS
- wire segment_enable_globals = (addr_segment == SEGMENT_ADDR_GLOBALS) ? 1'b1 : 1'b0;
- wire [31: 0] segment_globals_read_data;
- wire segment_globals_error;
-
- global_selector globals
- (
- .sys_clk(sys_clk),
- .sys_rst_n(sys_rst_n),
- .sys_ena(segment_enable_globals),
-
- .sys_eim_addr(addr_segment_int),
- .sys_eim_wr(sys_eim_wr),
- .sys_eim_rd(sys_eim_rd),
- .sys_write_data(sys_write_data),
- .sys_read_data(segment_globals_read_data),
- .sys_error(segment_globals_error)
- );
-
- reg [31: 0] segment_globals_read_data_reg;
- always @(posedge sys_clk)
- segment_globals_read_data_reg <= segment_globals_read_data;
-
- `endif
-
-
- //----------------------------------------------------------------
- // HASHES Segment
- //----------------------------------------------------------------
- `ifdef USE_SEGMENT_HASHES
- wire segment_enable_hashes = (addr_segment == SEGMENT_ADDR_HASHES) ? 1'b1 : 1'b0;
- wire [31: 0] segment_hashes_read_data;
- wire segment_hashes_error;
-
- hash_selector hashes
- (
- .sys_clk(sys_clk),
- .sys_rst_n(sys_rst_n),
- .sys_ena(segment_enable_hashes),
-
- .sys_eim_addr(addr_segment_int),
- .sys_eim_wr(sys_eim_wr),
- .sys_eim_rd(sys_eim_rd),
- .sys_write_data(sys_write_data),
- .sys_read_data(segment_hashes_read_data),
- .sys_error(segment_hashes_error)
- );
-
- reg [31: 0] segment_hashes_read_data_reg;
- always @(posedge sys_clk)
- segment_hashes_read_data_reg <= segment_hashes_read_data;
-
- `endif
-
-
- //----------------------------------------------------------------
- // RNGS Segment
- //----------------------------------------------------------------
- `ifdef USE_SEGMENT_RNGS
- wire segment_enable_rngs = (addr_segment == SEGMENT_ADDR_RNGS) ? 1'b1 : 1'b0;
- wire [31: 0] segment_rngs_read_data;
- wire segment_rngs_error;
- wire [7 : 0] segment_rngs_debug;
-
- rng_selector rngs
- (
- .sys_clk(sys_clk),
- .sys_rst_n(sys_rst_n),
- .sys_ena(segment_enable_rngs),
-
- .sys_eim_addr(addr_segment_int),
- .sys_eim_wr(sys_eim_wr),
- .sys_eim_rd(sys_eim_rd),
- .sys_write_data(sys_write_data),
- .sys_read_data(segment_rngs_read_data),
- .sys_error(segment_rngs_error),
-
- .noise(noise), // only RNG segment uses these ports
- .debug(segment_rngs_debug)
- );
-
- reg [31: 0] segment_rngs_read_data_reg;
- always @(posedge sys_clk)
- segment_rngs_read_data_reg <= segment_rngs_read_data;
-
- `endif
-
-
- //----------------------------------------------------------------
- // CIPHERS Segment
- //----------------------------------------------------------------
- `ifdef USE_SEGMENT_CIPHERS
- wire segment_enable_ciphers = (addr_segment == SEGMENT_ADDR_CIPHERS) ? 1'b1 : 1'b0;
- wire [31: 0] segment_ciphers_read_data;
-
- cipher_selector ciphers
- (
- .sys_clk(sys_clk),
- .sys_rst_n(sys_rst_n),
- .sys_ena(segment_enable_ciphers),
-
- .sys_eim_addr(addr_segment_int),
- .sys_eim_wr(sys_eim_wr),
- .sys_eim_rd(sys_eim_rd),
- .sys_write_data(sys_write_data),
- .sys_read_data(segment_ciphers_read_data),
- .sys_error(segment_ciphers_error)
- );
-
- reg [31: 0] segment_ciphers_read_data_reg;
- always @(posedge sys_clk)
- segment_ciphers_read_data_reg <= segment_ciphers_read_data;
-
- `endif
-
-
- //----------------------------------------------------------------
- // MATH Segment
- //----------------------------------------------------------------
- `ifdef USE_SEGMENT_MATH
- wire segment_enable_math = (addr_segment == SEGMENT_ADDR_MATH) ? 1'b1 : 1'b0;
- wire [31: 0] segment_math_read_data;
-
- math_selector maths
- (
- .sys_clk(sys_clk),
- .sys_rst_n(sys_rst_n),
- .sys_ena(segment_enable_math),
-
- .sys_eim_addr(addr_segment_int),
- .sys_eim_wr(sys_eim_wr),
- .sys_eim_rd(sys_eim_rd),
- .sys_write_data(sys_write_data),
- .sys_read_data(segment_math_read_data)
- );
- `endif
-
-
- //----------------------------------------------------------------
- // Output (Read Data) Bus
- //----------------------------------------------------------------
- reg [31: 0] sys_read_data_reg;
- reg [07: 0] sys_debug;
- reg sys_error_reg;
-
- assign sys_read_data = sys_read_data_reg;
- assign sys_error = sys_error_reg;
- assign debug = sys_debug;
-
- always @*
- begin : output_select
- sys_debug = 8'h00;
- sys_read_data_reg = {32{1'b0}};
- sys_error_reg = 1;
- sys_debug = 8'h00;
-
- case (addr_segment)
- `ifdef USE_SEGMENT_GLOBALS
- SEGMENT_ADDR_GLOBALS:
- begin
- sys_read_data_reg = segment_globals_read_data_reg;
- sys_error_reg = segment_globals_error;
- end
- `endif
- `ifdef USE_SEGMENT_HASHES
- SEGMENT_ADDR_HASHES:
- begin
- sys_read_data_reg = segment_hashes_read_data_reg;
- sys_error_reg = segment_hashes_error;
- end
- `endif
- `ifdef USE_SEGMENT_RNGS
- SEGMENT_ADDR_RNGS:
- begin
- sys_read_data_reg = segment_rngs_read_data_reg;
- sys_error_reg = segment_rngs_error;
- sys_debug = segment_rngs_debug;
- end
- `endif
- `ifdef USE_SEGMENT_CIPHERS
- SEGMENT_ADDR_CIPHERS:
- begin
- sys_read_data_reg = segment_ciphers_read_data_reg;
- sys_error_reg = segment_ciphers_error;
- end
- `endif
- `ifdef USE_SEGMENT_MATH
- SEGMENT_ADDR_MATH:
- begin
- sys_read_data_reg = segment_math_read_data;
- sys_error_reg = 0;
- end
- `endif
- default:
- begin
- end
- endcase
- end // output_select
-
-endmodule
-
-
-//======================================================================
-// EOF core_selector.v
-//======================================================================
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