diff options
Diffstat (limited to 'rtl/src/verilog')
| -rw-r--r-- | rtl/src/verilog/core_selector.v | 11 | ||||
| -rw-r--r-- | rtl/src/verilog/demo_adder.v | 108 | ||||
| -rw-r--r-- | rtl/src/verilog/sha1.v | 204 | ||||
| -rw-r--r-- | rtl/src/verilog/sha256.v | 204 | ||||
| -rw-r--r-- | rtl/src/verilog/sha512.v | 241 |
5 files changed, 653 insertions, 115 deletions
diff --git a/rtl/src/verilog/core_selector.v b/rtl/src/verilog/core_selector.v index e39a8b1..8ac8909 100644 --- a/rtl/src/verilog/core_selector.v +++ b/rtl/src/verilog/core_selector.v @@ -1,7 +1,7 @@ //====================================================================== // // 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 @@ -170,8 +170,7 @@ module core_selector .address(addr_core_reg), .write_data(sys_write_data), - .read_data(read_data_sha1), - .error() + .read_data(read_data_sha1) );
`endif
@@ -192,8 +191,7 @@ module core_selector .address(addr_core_reg), .write_data(sys_write_data), - .read_data(read_data_sha256), - .error() + .read_data(read_data_sha256) );
`endif
@@ -214,8 +212,7 @@ module core_selector .address(addr_core_reg), .write_data(sys_write_data), - .read_data(read_data_sha512), - .error() + .read_data(read_data_sha512) );
`endif
diff --git a/rtl/src/verilog/demo_adder.v b/rtl/src/verilog/demo_adder.v deleted file mode 100644 index 54e7f72..0000000 --- a/rtl/src/verilog/demo_adder.v +++ /dev/null @@ -1,108 +0,0 @@ -//====================================================================== -// -// demo_adder.v -// ------------ -// Simple test core for the Cryptech Novena FPGA framework. The core -// s a 32-bit adder that allows us to verfy that we can write registers -// get a computation done and read out the registers via the EIM. -// -// -// Author: Pavel Shatov -// Copyright (c) 2014, 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 demo_adder - ( - clk, rst, - x, y, z, - ctl, sts - ); - - // - // Ports - // - input wire clk; // clock - input wire rst; // reset - - input wire [31: 0] x; // x - input wire [31: 0] y; // y - output wire [31: 0] z; // z = x + y - - input wire [15: 0] ctl; // control - output wire [15: 0] sts; // status - - - // - // Internal Registers - // - reg [31: 0] z_reg = {32{1'b0}}; - reg [15: 0] sts_reg = {16{1'b0}}; - reg [15: 0] ctl_dly = {16{1'b0}}; - - assign z = z_reg; - assign sts = sts_reg; - - - // - // Control Logic - // - always @(posedge clk) - // - if (rst) ctl_dly <= {16{1'b0}}; - else ctl_dly <= ctl; - - /* This flag is set whenever different value is written to control register. */ - - wire adder_go = (ctl != ctl_dly) ? 1'b1 : 1'b0; - - - // - // Adder Logic - // - always @(posedge clk) - // - if (rst) z_reg <= {32{1'b0}}; - else if (adder_go) z_reg <= x + y; - - - // - // Status Logic - // - always @(posedge clk) - // - if (rst) sts_reg <= {16{1'b0}}; - else if (adder_go) sts_reg <= ctl; - - -endmodule - -//====================================================================== -// EOF demo_adder.v -//====================================================================== diff --git a/rtl/src/verilog/sha1.v b/rtl/src/verilog/sha1.v new file mode 100644 index 0000000..2595132 --- /dev/null +++ b/rtl/src/verilog/sha1.v @@ -0,0 +1,204 @@ +//====================================================================== +// +// sha1.v +// ------ +// Top level wrapper for the SHA-1 hash function providing +// a simple memory like interface with 32 bit data access. +// +// Authors: Joachim Strömbergson, Paul Selkirk +// Copyright (c) 2014, 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 sha1( + // Clock and reset. + input wire clk, + input wire reset_n, + + // Control. + input wire cs, + input wire we, + + // Data ports. + input wire [7 : 0] address, + input wire [31 : 0] write_data, + output wire [31 : 0] read_data + ); + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter ADDR_NAME0 = 8'h00; + parameter ADDR_NAME1 = 8'h01; + parameter ADDR_VERSION = 8'h02; + + parameter ADDR_CTRL = 8'h08; + parameter CTRL_INIT_BIT = 0; + parameter CTRL_NEXT_BIT = 1; + + parameter ADDR_STATUS = 8'h09; + parameter STATUS_READY_BIT = 0; + parameter STATUS_VALID_BIT = 1; + + parameter ADDR_BLOCK = 8'h10; + + parameter ADDR_DIGEST = 8'h20; + + parameter CORE_NAME0 = 32'h73686131; // "sha1" + parameter CORE_NAME1 = 32'h20202020; // " " + parameter CORE_VERSION = 32'h302e3530; // "0.50" + + parameter BLOCK_BITS = 512; + parameter DIGEST_BITS = 160; + parameter BLOCK_WORDS = BLOCK_BITS / 32; + parameter DIGEST_WORDS = DIGEST_BITS / 32; + + //---------------------------------------------------------------- + // Registers. + //---------------------------------------------------------------- + reg [0 : BLOCK_BITS - 1] block_reg; + reg [0 : DIGEST_BITS - 1] digest_reg; + reg init_reg; + reg next_reg; + + reg [31 : 0] tmp_read_data; + reg [31 : 0] tmp_read_data_reg; + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + wire core_init; + wire core_next; + wire core_ready; + wire [0 : BLOCK_BITS - 1] core_block; + wire [0 : DIGEST_BITS - 1] core_digest; + wire core_digest_valid; + + wire [31 : 0] core_name0 = CORE_NAME0; + wire [31 : 0] core_name1 = CORE_NAME1; + wire [31 : 0] core_version = CORE_VERSION; + wire [31 : 0] core_ctrl; + wire [31 : 0] core_status; + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign core_init = init_reg; + assign core_next = next_reg; + assign core_ctrl = { 30'b0, next_reg, init_reg }; + assign core_status = { 30'b0, core_digest_valid, core_ready }; + assign core_block = block_reg; + + assign read_data = tmp_read_data_reg; + + //---------------------------------------------------------------- + // core instantiation. + //---------------------------------------------------------------- + sha1_core core( + .clk(clk), + .reset_n(reset_n), + + .init(core_init), + .next(core_next), + + .block(core_block), + + .ready(core_ready), + + .digest(core_digest), + .digest_valid(core_digest_valid) + ); + + + //---------------------------------------------------------------- + // latch in digest when ready + //---------------------------------------------------------------- + always @(posedge clk) + begin + if (core_digest_valid) + digest_reg <= core_digest; + end + + //---------------------------------------------------------------- + // storage registers for mapping memory to core interface + //---------------------------------------------------------------- + always @(posedge clk) + begin + init_reg <= 0; + next_reg <= 0; + + if (cs && we) + begin + // write operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + block_reg[((address - ADDR_BLOCK) * 32)+:32] <= write_data; + else if (address == ADDR_CTRL) + begin + init_reg <= write_data[CTRL_INIT_BIT]; + next_reg <= write_data[CTRL_NEXT_BIT]; + end + end + end + + always @* + begin + tmp_read_data = 32'h00000000; + + if (cs && !we) + begin + // read operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + tmp_read_data = block_reg[((address - ADDR_BLOCK) * 32)+:32]; + else if ((address >= ADDR_DIGEST) && + (address < ADDR_DIGEST + DIGEST_WORDS)) + tmp_read_data = digest_reg[((address - ADDR_DIGEST) * 32)+:32]; + else + case (address) + ADDR_NAME0: + tmp_read_data = core_name0; + ADDR_NAME1: + tmp_read_data = core_name1; + ADDR_VERSION: + tmp_read_data = core_version; + ADDR_CTRL: + tmp_read_data = core_ctrl; + ADDR_STATUS: + tmp_read_data = core_status; + endcase + end + end + + always @(posedge clk) + begin + tmp_read_data_reg <= tmp_read_data; + end + +endmodule // sha1 diff --git a/rtl/src/verilog/sha256.v b/rtl/src/verilog/sha256.v new file mode 100644 index 0000000..d6fb133 --- /dev/null +++ b/rtl/src/verilog/sha256.v @@ -0,0 +1,204 @@ +//====================================================================== +// +// sha256.v +// ------ +// Top level wrapper for the SHA-256 hash function providing +// a simple memory like interface with 32 bit data access. +// +// Authors: Joachim Strömbergson, Paul Selkirk +// Copyright (c) 2014, 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 sha256( + // Clock and reset. + input wire clk, + input wire reset_n, + + // Control. + input wire cs, + input wire we, + + // Data ports. + input wire [7 : 0] address, + input wire [31 : 0] write_data, + output wire [31 : 0] read_data + ); + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter ADDR_NAME0 = 8'h00; + parameter ADDR_NAME1 = 8'h01; + parameter ADDR_VERSION = 8'h02; + + parameter ADDR_CTRL = 8'h08; + parameter CTRL_INIT_BIT = 0; + parameter CTRL_NEXT_BIT = 1; + + parameter ADDR_STATUS = 8'h09; + parameter STATUS_READY_BIT = 0; + parameter STATUS_VALID_BIT = 1; + + parameter ADDR_BLOCK = 8'h10; + + parameter ADDR_DIGEST = 8'h20; + + parameter CORE_NAME0 = 32'h73686132; // "sha2" + parameter CORE_NAME1 = 32'h2d323536; // "-256" + parameter CORE_VERSION = 32'h302e3830; // "0.80" + + parameter BLOCK_BITS = 512; + parameter DIGEST_BITS = 256; + parameter BLOCK_WORDS = BLOCK_BITS / 32; + parameter DIGEST_WORDS = DIGEST_BITS / 32; + + //---------------------------------------------------------------- + // Registers. + //---------------------------------------------------------------- + reg [0 : BLOCK_BITS - 1] block_reg; + reg [0 : DIGEST_BITS - 1] digest_reg; + reg init_reg; + reg next_reg; + + reg [31 : 0] tmp_read_data; + reg [31 : 0] tmp_read_data_reg; + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + wire core_init; + wire core_next; + wire core_ready; + wire [0 : BLOCK_BITS - 1] core_block; + wire [0 : DIGEST_BITS - 1] core_digest; + wire core_digest_valid; + + wire [31 : 0] core_name0 = CORE_NAME0; + wire [31 : 0] core_name1 = CORE_NAME1; + wire [31 : 0] core_version = CORE_VERSION; + wire [31 : 0] core_ctrl; + wire [31 : 0] core_status; + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign core_init = init_reg; + assign core_next = next_reg; + assign core_ctrl = { 30'b0, next_reg, init_reg }; + assign core_status = { 30'b0, core_digest_valid, core_ready }; + assign core_block = block_reg; + + assign read_data = tmp_read_data_reg; + + //---------------------------------------------------------------- + // core instantiation. + //---------------------------------------------------------------- + sha256_core core( + .clk(clk), + .reset_n(reset_n), + + .init(core_init), + .next(core_next), + + .block(core_block), + + .ready(core_ready), + + .digest(core_digest), + .digest_valid(core_digest_valid) + ); + + + //---------------------------------------------------------------- + // latch in digest when ready + //---------------------------------------------------------------- + always @(posedge clk) + begin + if (core_digest_valid) + digest_reg <= core_digest; + end + + //---------------------------------------------------------------- + // storage registers for mapping memory to core interface + //---------------------------------------------------------------- + always @(posedge clk) + begin + init_reg <= 0; + next_reg <= 0; + + if (cs && we) + begin + // write operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + block_reg[((address - ADDR_BLOCK) * 32)+:32] <= write_data; + else if (address == ADDR_CTRL) + begin + init_reg <= write_data[CTRL_INIT_BIT]; + next_reg <= write_data[CTRL_NEXT_BIT]; + end + end + end + + always @* + begin + tmp_read_data = 32'h00000000; + + if (cs && !we) + begin + // read operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + tmp_read_data = block_reg[((address - ADDR_BLOCK) * 32)+:32]; + else if ((address >= ADDR_DIGEST) && + (address < ADDR_DIGEST + DIGEST_WORDS)) + tmp_read_data = digest_reg[((address - ADDR_DIGEST) * 32)+:32]; + else + case (address) + ADDR_NAME0: + tmp_read_data = core_name0; + ADDR_NAME1: + tmp_read_data = core_name1; + ADDR_VERSION: + tmp_read_data = core_version; + ADDR_CTRL: + tmp_read_data = core_ctrl; + ADDR_STATUS: + tmp_read_data = core_status; + endcase + end + end + + always @(posedge clk) + begin + tmp_read_data_reg <= tmp_read_data; + end + +endmodule // sha256 diff --git a/rtl/src/verilog/sha512.v b/rtl/src/verilog/sha512.v new file mode 100644 index 0000000..4d2a9e7 --- /dev/null +++ b/rtl/src/verilog/sha512.v @@ -0,0 +1,241 @@ +//====================================================================== +// +// sha512.v +// ------ +// Top level wrapper for the SHA-512 hash function providing +// a simple memory like interface with 32 bit data access. +// +// Authors: Joachim Strömbergson, Paul Selkirk +// Copyright (c) 2014, 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 sha512( + // Clock and reset. + input wire clk, + input wire reset_n, + + // Control. + input wire cs, + input wire we, + + // Data ports. + input wire [7 : 0] address, + input wire [31 : 0] write_data, + output wire [31 : 0] read_data + ); + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter ADDR_NAME0 = 8'h00; + parameter ADDR_NAME1 = 8'h01; + parameter ADDR_VERSION = 8'h02; + + parameter ADDR_CTRL = 8'h08; + parameter CTRL_INIT_BIT = 0; + parameter CTRL_NEXT_BIT = 1; + parameter CTRL_MODE_LOW_BIT = 2; + parameter CTRL_MODE_HIGH_BIT = 3; + parameter CTRL_WORK_FACTOR_BIT = 7; + + parameter ADDR_STATUS = 8'h09; + parameter STATUS_READY_BIT = 0; + parameter STATUS_VALID_BIT = 1; + + parameter ADDR_WORK_FACTOR_NUM = 8'h0a; + + parameter ADDR_BLOCK = 8'h10; + + parameter ADDR_DIGEST = 8'h40; + + parameter CORE_NAME0 = 32'h73686132; // "sha2" + parameter CORE_NAME1 = 32'h2d353132; // "-512" + parameter CORE_VERSION = 32'h302e3830; // "0.80" + + parameter MODE_SHA_512_224 = 2'h0; + parameter MODE_SHA_512_256 = 2'h1; + parameter MODE_SHA_384 = 2'h2; + parameter MODE_SHA_512 = 2'h3; + + parameter DEFAULT_WORK_FACTOR_NUM = 32'h000f0000; + + parameter BLOCK_BITS = 1024; + parameter DIGEST_BITS = 512; + parameter BLOCK_WORDS = BLOCK_BITS / 32; + parameter DIGEST_WORDS = DIGEST_BITS / 32; + + //---------------------------------------------------------------- + // Registers. + //---------------------------------------------------------------- + reg [0 : BLOCK_BITS - 1] block_reg; + reg [0 : DIGEST_BITS - 1] digest_reg; + reg init_reg; + reg next_reg; + reg [1 : 0] mode_reg; + reg work_factor_reg; + reg [31 : 0] work_factor_num_reg; + + reg [31 : 0] tmp_read_data; + reg [31 : 0] tmp_read_data_reg; + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + wire core_init; + wire core_next; + wire core_ready; + wire [1 : 0] core_mode; + wire core_work_factor; + wire [31 : 0] core_work_factor_num; + wire [0 : BLOCK_BITS - 1] core_block; + wire [0 : DIGEST_BITS - 1] core_digest; + wire core_digest_valid; + + wire [31 : 0] core_name0 = CORE_NAME0; + wire [31 : 0] core_name1 = CORE_NAME1; + wire [31 : 0] core_version = CORE_VERSION; + wire [31 : 0] core_ctrl; + wire [31 : 0] core_status; + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign core_init = init_reg; + assign core_next = next_reg; + assign core_mode = mode_reg; + assign core_work_factor = work_factor_reg; + assign core_work_factor_num = work_factor_num_reg; + assign core_ctrl = {24'h000000, work_factor_reg, 3'b000, + mode_reg, next_reg, init_reg}; + assign core_status = { 30'b0, core_digest_valid, core_ready }; + assign core_block = block_reg; + + assign read_data = tmp_read_data_reg; + + //---------------------------------------------------------------- + // core instantiation. + //---------------------------------------------------------------- + sha512_core core( + .clk(clk), + .reset_n(reset_n), + + .init(core_init), + .next(core_next), + .mode(core_mode), + + .work_factor(core_work_factor), + .work_factor_num(core_work_factor_num), + + .block(core_block), + + .ready(core_ready), + + .digest(core_digest), + .digest_valid(core_digest_valid) + ); + + + //---------------------------------------------------------------- + // latch in digest when ready + //---------------------------------------------------------------- + always @(posedge clk) + begin + if (core_digest_valid) + digest_reg <= core_digest; + end + + //---------------------------------------------------------------- + // storage registers for mapping memory to core interface + //---------------------------------------------------------------- + always @(posedge clk) + begin + init_reg <= 0; + next_reg <= 0; + mode_reg <= MODE_SHA_512; + work_factor_reg <= 0; + work_factor_num_reg <= DEFAULT_WORK_FACTOR_NUM; + + if (cs && we) + begin + // write operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + block_reg[((address - ADDR_BLOCK) * 32)+:32] <= write_data; + else if (address == ADDR_CTRL) + begin + init_reg <= write_data[CTRL_INIT_BIT]; + next_reg <= write_data[CTRL_NEXT_BIT]; + mode_reg <= write_data[CTRL_MODE_HIGH_BIT : CTRL_MODE_LOW_BIT]; + work_factor_reg <= write_data[CTRL_WORK_FACTOR_BIT]; + end + else if (address == ADDR_WORK_FACTOR_NUM) + begin + work_factor_num_reg <= write_data; + end + end + end + + always @* + begin + tmp_read_data = 32'h00000000; + + if (cs && !we) + begin + // read operations + if ((address >= ADDR_BLOCK) && + (address < ADDR_BLOCK + BLOCK_WORDS)) + tmp_read_data = block_reg[((address - ADDR_BLOCK) * 32)+:32]; + else if ((address >= ADDR_DIGEST) && + (address < ADDR_DIGEST + DIGEST_WORDS)) + tmp_read_data = digest_reg[((address - ADDR_DIGEST) * 32)+:32]; + else + case (address) + ADDR_NAME0: + tmp_read_data = core_name0; + ADDR_NAME1: + tmp_read_data = core_name1; + ADDR_VERSION: + tmp_read_data = core_version; + ADDR_CTRL: + tmp_read_data = core_ctrl; + ADDR_STATUS: + tmp_read_data = core_status; + ADDR_WORK_FACTOR_NUM: + tmp_read_data = work_factor_num_reg; + endcase + end + end + + always @(posedge clk) + begin + tmp_read_data_reg <= tmp_read_data; + end + +endmodule // sha512 |