diff options
Diffstat (limited to 'rtl')
| -rw-r--r-- | rtl/curve/point_dbl_add_256.v | 864 | ||||
| -rw-r--r-- | rtl/curve/point_mul_256.v | 849 | ||||
| -rw-r--r-- | rtl/ecdhp256.v | 192 | ||||
| -rw-r--r-- | rtl/ecdhp256_wrapper.v | 177 |
4 files changed, 2082 insertions, 0 deletions
diff --git a/rtl/curve/point_dbl_add_256.v b/rtl/curve/point_dbl_add_256.v new file mode 100644 index 0000000..56c88e7 --- /dev/null +++ b/rtl/curve/point_dbl_add_256.v @@ -0,0 +1,864 @@ +//------------------------------------------------------------------------------ +// +// point_dbl_add_256.v +// ----------------------------------------------------------------------------- +// Elliptic curve point adder and doubler. +// +// Authors: Pavel Shatov +// +// Copyright (c) 2018, NORDUnet A/S +// +// 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 point_dbl_add_256 + ( + clk, rst_n, + ena, rdy, + uop_addr, uop, + gx_addr, gy_addr, hx_addr, hy_addr, + px_addr, py_addr, pz_addr, rx_addr, ry_addr, rz_addr, q_addr, v_addr, + rx_wren, ry_wren, rz_wren, + gx_din, gy_din, hx_din, hy_din, + px_din, py_din, pz_din, + rx_din, ry_din, rz_din, + rx_dout, ry_dout, rz_dout, q_din, v_din + ); + + + // + // Microcode + // +`include "../../../../math/ecdsalib/rtl/curve/uop_ecdsa.v" + + + // + // Constants + // + localparam WORD_COUNTER_WIDTH = 3; // 0 .. 7 + localparam OPERAND_NUM_WORDS = 8; // 8 * 32 = 256 + + + // + // Ports + // + input wire clk; // system clock + input wire rst_n; // active-low async reset + + input wire ena; // enable input + output wire rdy; // ready output + + output reg [ 6-1: 0] uop_addr; + input wire [20-1: 0] uop; + + output reg [WORD_COUNTER_WIDTH-1:0] gx_addr; + output reg [WORD_COUNTER_WIDTH-1:0] gy_addr; + output reg [WORD_COUNTER_WIDTH-1:0] hx_addr; + output reg [WORD_COUNTER_WIDTH-1:0] hy_addr; + output reg [WORD_COUNTER_WIDTH-1:0] px_addr; + output reg [WORD_COUNTER_WIDTH-1:0] py_addr; + output reg [WORD_COUNTER_WIDTH-1:0] pz_addr; + output reg [WORD_COUNTER_WIDTH-1:0] rx_addr; + output reg [WORD_COUNTER_WIDTH-1:0] ry_addr; + output reg [WORD_COUNTER_WIDTH-1:0] rz_addr; + output reg [WORD_COUNTER_WIDTH-1:0] v_addr; + output wire [WORD_COUNTER_WIDTH-1:0] q_addr; + + output wire rx_wren; + output wire ry_wren; + output wire rz_wren; + + input wire [ 32-1:0] gx_din; + input wire [ 32-1:0] gy_din; + input wire [ 32-1:0] hx_din; + input wire [ 32-1:0] hy_din; + input wire [ 32-1:0] px_din; + input wire [ 32-1:0] py_din; + input wire [ 32-1:0] pz_din; + input wire [ 32-1:0] rx_din; + input wire [ 32-1:0] ry_din; + input wire [ 32-1:0] rz_din; + output wire [ 32-1:0] rx_dout; + output wire [ 32-1:0] ry_dout; + output wire [ 32-1:0] rz_dout; + input wire [ 32-1:0] q_din; + input wire [ 32-1:0] v_din; + + + // + // Microcode + // + wire [ 4: 0] uop_opcode = uop[19:15]; + wire [ 4: 0] uop_src_a = uop[14:10]; + wire [ 4: 0] uop_src_b = uop[ 9: 5]; + wire [ 2: 0] uop_dst = uop[ 4: 2]; + wire [ 1: 0] uop_exec = uop[ 1: 0]; + + + // + // Multi-Word Comparator + // + wire mw_cmp_ena; + wire mw_cmp_rdy; + + wire mw_cmp_out_l; + wire mw_cmp_out_e; + wire mw_cmp_out_g; + + wire [WORD_COUNTER_WIDTH-1:0] mw_cmp_addr_xy; + + wire [ 32-1:0] mw_cmp_din_x; + wire [ 32-1:0] mw_cmp_din_y; + + // flags + reg flag_pz_is_zero; + reg flag_t1_is_zero; + reg flag_t2_is_zero; + + mw_comparator # + ( + .WORD_COUNTER_WIDTH (WORD_COUNTER_WIDTH), + .OPERAND_NUM_WORDS (OPERAND_NUM_WORDS) + ) + mw_comparator_inst + ( + .clk (clk), + .rst_n (rst_n), + + .ena (mw_cmp_ena), + .rdy (mw_cmp_rdy), + + .xy_addr (mw_cmp_addr_xy), + .x_din (mw_cmp_din_x), + .y_din (mw_cmp_din_y), + + .cmp_l (mw_cmp_out_l), + .cmp_e (mw_cmp_out_e), + .cmp_g (mw_cmp_out_g) + ); + + + // + // Modular Adder + // + wire mod_add_ena; + wire mod_add_rdy; + + wire [WORD_COUNTER_WIDTH-1:0] mod_add_addr_ab; + wire [WORD_COUNTER_WIDTH-1:0] mod_add_addr_n; + wire [WORD_COUNTER_WIDTH-1:0] mod_add_addr_s; + wire mod_add_wren_s; + + wire [ 32-1:0] mod_add_din_a; + wire [ 32-1:0] mod_add_din_b; + wire [ 32-1:0] mod_add_din_n; + wire [ 32-1:0] mod_add_dout_s; + + assign mod_add_din_n = q_din; + + modular_adder # + ( + .WORD_COUNTER_WIDTH (WORD_COUNTER_WIDTH), + .OPERAND_NUM_WORDS (OPERAND_NUM_WORDS) + ) + modular_adder_inst + ( + .clk (clk), + .rst_n (rst_n), + + .ena (mod_add_ena), + .rdy (mod_add_rdy), + + .ab_addr (mod_add_addr_ab), + .n_addr (mod_add_addr_n), + .s_addr (mod_add_addr_s), + .s_wren (mod_add_wren_s), + + .a_din (mod_add_din_a), + .b_din (mod_add_din_b), + .n_din (mod_add_din_n), + .s_dout (mod_add_dout_s) + ); + + + // + // Modular Subtractor + // + wire mod_sub_ena; + wire mod_sub_rdy; + + wire [WORD_COUNTER_WIDTH-1:0] mod_sub_addr_ab; + wire [WORD_COUNTER_WIDTH-1:0] mod_sub_addr_n; + wire [WORD_COUNTER_WIDTH-1:0] mod_sub_addr_d; + wire mod_sub_wren_d; + + wire [ 32-1:0] mod_sub_din_a; + wire [ 32-1:0] mod_sub_din_b; + wire [ 32-1:0] mod_sub_din_n; + wire [ 32-1:0] mod_sub_dout_d; + + assign mod_sub_din_n = q_din; + + modular_subtractor # + ( + .WORD_COUNTER_WIDTH (WORD_COUNTER_WIDTH), + .OPERAND_NUM_WORDS (OPERAND_NUM_WORDS) + ) + modular_subtractor_inst + ( + .clk (clk), + .rst_n (rst_n), + + .ena (mod_sub_ena), + .rdy (mod_sub_rdy), + + .ab_addr (mod_sub_addr_ab), + .n_addr (mod_sub_addr_n), + .d_addr (mod_sub_addr_d), + .d_wren (mod_sub_wren_d), + + .a_din (mod_sub_din_a), + .b_din (mod_sub_din_b), + .n_din (mod_sub_din_n), + .d_dout (mod_sub_dout_d) + ); + + + // + // Modular Multiplier + // + wire mod_mul_ena; + wire mod_mul_rdy; + + wire [WORD_COUNTER_WIDTH-1:0] mod_mul_addr_a; + wire [WORD_COUNTER_WIDTH-1:0] mod_mul_addr_b; + wire [WORD_COUNTER_WIDTH-1:0] mod_mul_addr_n; + wire [WORD_COUNTER_WIDTH-1:0] mod_mul_addr_p; + wire mod_mul_wren_p; + + wire [ 32-1:0] mod_mul_din_a; + wire [ 32-1:0] mod_mul_din_b; + wire [ 32-1:0] mod_mul_din_n; + wire [ 32-1:0] mod_mul_dout_p; + + assign mod_mul_din_n = q_din; + + modular_multiplier_256 modular_multiplier_inst + ( + .clk (clk), + .rst_n (rst_n), + + .ena (mod_mul_ena), + .rdy (mod_mul_rdy), + + .a_addr (mod_mul_addr_a), + .b_addr (mod_mul_addr_b), + .n_addr (mod_mul_addr_n), + .p_addr (mod_mul_addr_p), + .p_wren (mod_mul_wren_p), + + .a_din (mod_mul_din_a), + .b_din (mod_mul_din_b), + .n_din (mod_mul_din_n), + .p_dout (mod_mul_dout_p) + ); + + + // + // Multi-Word Data Mover + // + wire mw_mov_ena; + wire mw_mov_rdy; + + wire [WORD_COUNTER_WIDTH-1:0] mw_mov_addr_x; + wire [WORD_COUNTER_WIDTH-1:0] mw_mov_addr_y; + wire mw_mov_wren_y; + + wire [ 32-1:0] mw_mov_din_x; + wire [ 32-1:0] mw_mov_dout_y; + + mw_mover # + ( + .WORD_COUNTER_WIDTH (WORD_COUNTER_WIDTH), + .OPERAND_NUM_WORDS (OPERAND_NUM_WORDS) + + ) + mw_mover_inst + ( + .clk (clk), + .rst_n (rst_n), + + .ena (mw_mov_ena), + .rdy (mw_mov_rdy), + + .x_addr (mw_mov_addr_x), + .y_addr (mw_mov_addr_y), + .y_wren (mw_mov_wren_y), + + .x_din (mw_mov_din_x), + .y_dout (mw_mov_dout_y) + ); + + + // + // ROMs + // + reg [WORD_COUNTER_WIDTH-1:0] brom_one_addr; + //reg [WORD_COUNTER_WIDTH-1:0] brom_zero_addr; + reg [WORD_COUNTER_WIDTH-1:0] brom_delta_addr; + + wire [ 32-1:0] brom_one_dout; + wire [ 32-1:0] brom_zero_dout; + wire [ 32-1:0] brom_delta_dout; + + (* ROM_STYLE="BLOCK" *) brom_p256_one brom_one_inst + (.clk(clk), .b_addr(brom_one_addr), .b_out(brom_one_dout)); + + brom_p256_zero brom_zero_inst + (.b_out(brom_zero_dout)); + + (* ROM_STYLE="BLOCK" *) brom_p256_delta brom_delta_inst + (.clk(clk), .b_addr(brom_delta_addr), .b_out(brom_delta_dout)); + + + // + // Temporary Variables + // + reg [WORD_COUNTER_WIDTH-1:0] bram_t1_wr_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t2_wr_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t3_wr_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t4_wr_addr; + + reg [WORD_COUNTER_WIDTH-1:0] bram_t1_rd_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t2_rd_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t3_rd_addr; + reg [WORD_COUNTER_WIDTH-1:0] bram_t4_rd_addr; + + wire bram_t1_wr_en; + wire bram_t2_wr_en; + wire bram_t3_wr_en; + wire bram_t4_wr_en; + + wire [ 32-1:0] bram_t1_wr_data; + wire [ 32-1:0] bram_t2_wr_data; + wire [ 32-1:0] bram_t3_wr_data; + wire [ 32-1:0] bram_t4_wr_data; + + wire [ 32-1:0] bram_t1_rd_data; + wire [ 32-1:0] bram_t2_rd_data; + wire [ 32-1:0] bram_t3_rd_data; + wire [ 32-1:0] bram_t4_rd_data; + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(WORD_COUNTER_WIDTH) + ) + bram_t1 + ( .clk (clk), + .a_addr(bram_t1_wr_addr), .a_wr(bram_t1_wr_en), .a_in(bram_t1_wr_data), .a_out(), + .b_addr(bram_t1_rd_addr), .b_out(bram_t1_rd_data) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(WORD_COUNTER_WIDTH) + ) + bram_t2 + ( .clk (clk), + .a_addr(bram_t2_wr_addr), .a_wr(bram_t2_wr_en), .a_in(bram_t2_wr_data), .a_out(), + .b_addr(bram_t2_rd_addr), .b_out(bram_t2_rd_data) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(WORD_COUNTER_WIDTH) + ) + bram_t3 + ( .clk (clk), + .a_addr(bram_t3_wr_addr), .a_wr(bram_t3_wr_en), .a_in(bram_t3_wr_data), .a_out(), + .b_addr(bram_t3_rd_addr), .b_out(bram_t3_rd_data) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(WORD_COUNTER_WIDTH) + ) + bram_t4 + ( .clk (clk), + .a_addr(bram_t4_wr_addr), .a_wr(bram_t4_wr_en), .a_in(bram_t4_wr_data), .a_out(), + .b_addr(bram_t4_rd_addr), .b_out(bram_t4_rd_data) + ); + + + // + // uOP Trigger Logic + // + reg uop_trig; + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) uop_trig <= 1'b0; + else uop_trig <= (fsm_state == FSM_STATE_FETCH) ? 1'b1 : 1'b0; + + + // + // FSM + // + localparam [ 1: 0] FSM_STATE_STALL = 2'b00; + localparam [ 1: 0] FSM_STATE_FETCH = 2'b01; + localparam [ 1: 0] FSM_STATE_EXECUTE = 2'b10; + + reg [ 1: 0] fsm_state = FSM_STATE_STALL; + wire [ 1: 0] fsm_state_next = (uop_opcode == OPCODE_RDY) ? FSM_STATE_STALL : FSM_STATE_FETCH; + + + // + // FSM Transition Logic + // + reg uop_done; + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) fsm_state <= FSM_STATE_STALL; + else case (fsm_state) + FSM_STATE_STALL: fsm_state <= ena ? FSM_STATE_FETCH : FSM_STATE_STALL; + FSM_STATE_FETCH: fsm_state <= FSM_STATE_EXECUTE; + FSM_STATE_EXECUTE: fsm_state <= (!uop_trig && uop_done) ? fsm_state_next : FSM_STATE_EXECUTE; + default: fsm_state <= FSM_STATE_STALL; + endcase + + + // + // uOP Address Increment Logic + // + always @(posedge clk) + // + if (fsm_state == FSM_STATE_STALL) + uop_addr <= 5'd0; + else if (fsm_state == FSM_STATE_EXECUTE) + if (!uop_trig && uop_done) + uop_addr <= (uop_opcode == OPCODE_RDY) ? 5'd0 : uop_addr + 1'b1; + + + // + // uOP Completion Logic + // + always @(*) + // + case (uop_opcode) + OPCODE_CMP: uop_done = mw_cmp_rdy; + OPCODE_MOV: uop_done = mw_mov_rdy; + OPCODE_ADD: uop_done = mod_add_rdy; + OPCODE_SUB: uop_done = mod_sub_rdy; + OPCODE_MUL: uop_done = mod_mul_rdy; + OPCODE_RDY: uop_done = 1'b1; + default: uop_done = 1'b0; + endcase + + + // + // Helper Modules Enable Logic + // + assign mw_cmp_ena = uop_opcode[0] & uop_trig; + assign mw_mov_ena = uop_opcode[1] & uop_trig; + assign mod_add_ena = uop_opcode[2] & uop_trig; + assign mod_sub_ena = uop_opcode[3] & uop_trig; + assign mod_mul_ena = uop_opcode[4] & uop_trig; + + + // + // uOP Source Value Decoding Logic + // + reg [31: 0] uop_src_a_value; + + always @(*) + // + case (uop_src_a) + UOP_SRC_PX: uop_src_a_value = px_din; + UOP_SRC_PY: uop_src_a_value = py_din; + UOP_SRC_PZ: uop_src_a_value = pz_din; + + UOP_SRC_RX: uop_src_a_value = rx_din; + UOP_SRC_RY: uop_src_a_value = ry_din; + UOP_SRC_RZ: uop_src_a_value = rz_din; + + UOP_SRC_T1: uop_src_a_value = bram_t1_rd_data; + UOP_SRC_T2: uop_src_a_value = bram_t2_rd_data; + UOP_SRC_T3: uop_src_a_value = bram_t3_rd_data; + UOP_SRC_T4: uop_src_a_value = bram_t4_rd_data; + + UOP_SRC_ONE: uop_src_a_value = brom_one_dout; + UOP_SRC_ZERO: uop_src_a_value = brom_zero_dout; + UOP_SRC_DELTA: uop_src_a_value = brom_delta_dout; + + UOP_SRC_G_X: uop_src_a_value = gx_din; + UOP_SRC_G_Y: uop_src_a_value = gy_din; + + UOP_SRC_H_X: uop_src_a_value = hx_din; + UOP_SRC_H_Y: uop_src_a_value = hy_din; + + UOP_SRC_V: uop_src_a_value = v_din; + + default: uop_src_a_value = {32{1'bX}}; + endcase + + + assign mw_cmp_din_x = uop_src_a_value; + assign mw_mov_din_x = uop_src_a_value; + assign mod_add_din_a = uop_src_a_value; + assign mod_sub_din_a = uop_src_a_value; + assign mod_mul_din_a = uop_src_a_value; + + reg [31: 0] uop_src_b_value; + + always @(*) + // + case (uop_src_b) + UOP_SRC_PX: uop_src_b_value = px_din; + UOP_SRC_PY: uop_src_b_value = py_din; + UOP_SRC_PZ: uop_src_b_value = pz_din; + + UOP_SRC_RX: uop_src_b_value = rx_din; + UOP_SRC_RY: uop_src_b_value = ry_din; + UOP_SRC_RZ: uop_src_b_value = rz_din; + + UOP_SRC_T1: uop_src_b_value = bram_t1_rd_data; + UOP_SRC_T2: uop_src_b_value = bram_t2_rd_data; + UOP_SRC_T3: uop_src_b_value = bram_t3_rd_data; + UOP_SRC_T4: uop_src_b_value = bram_t4_rd_data; + + UOP_SRC_ONE: uop_src_b_value = brom_one_dout; + UOP_SRC_ZERO: uop_src_b_value = brom_zero_dout; + UOP_SRC_DELTA: uop_src_b_value = brom_delta_dout; + + UOP_SRC_G_X: uop_src_b_value = gx_din; + UOP_SRC_G_Y: uop_src_b_value = gy_din; + + UOP_SRC_H_X: uop_src_b_value = hx_din; + UOP_SRC_H_Y: uop_src_b_value = hy_din; + + UOP_SRC_V: uop_src_b_value = v_din; + + default: uop_src_b_value = {32{1'bX}}; + endcase + + assign mw_cmp_din_y = uop_src_b_value; + assign mod_add_din_b = uop_src_b_value; + assign mod_sub_din_b = uop_src_b_value; + assign mod_mul_din_b = uop_src_b_value; + + + // + // uOP Source & Destination Address Decoding Logic + // + reg [WORD_COUNTER_WIDTH-1:0] uop_src_a_addr; + reg [WORD_COUNTER_WIDTH-1:0] uop_src_b_addr; + reg [WORD_COUNTER_WIDTH-1:0] uop_dst_addr; + reg [WORD_COUNTER_WIDTH-1:0] uop_q_addr; + + assign q_addr = uop_q_addr; + + always @(*) + // + case (uop_opcode) + // + OPCODE_CMP: begin + uop_src_a_addr = mw_cmp_addr_xy; + uop_src_b_addr = mw_cmp_addr_xy; + uop_dst_addr = {WORD_COUNTER_WIDTH{1'bX}}; + uop_q_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + OPCODE_MOV: begin + uop_src_a_addr = mw_mov_addr_x; + uop_src_b_addr = {WORD_COUNTER_WIDTH{1'bX}}; + uop_dst_addr = mw_mov_addr_y; + uop_q_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + OPCODE_ADD: begin + uop_src_a_addr = mod_add_addr_ab; + uop_src_b_addr = mod_add_addr_ab; + uop_dst_addr = mod_add_addr_s; + uop_q_addr = mod_add_addr_n; + end + // + OPCODE_SUB: begin + uop_src_a_addr = mod_sub_addr_ab; + uop_src_b_addr = mod_sub_addr_ab; + uop_dst_addr = mod_sub_addr_d; + uop_q_addr = mod_sub_addr_n; + end + // + OPCODE_MUL: begin + uop_src_a_addr = mod_mul_addr_a; + uop_src_b_addr = mod_mul_addr_b; + uop_dst_addr = mod_mul_addr_p; + uop_q_addr = mod_mul_addr_n; + end + // + default: begin + uop_src_a_addr = {WORD_COUNTER_WIDTH{1'bX}}; + uop_src_b_addr = {WORD_COUNTER_WIDTH{1'bX}}; + uop_dst_addr = {WORD_COUNTER_WIDTH{1'bX}}; + uop_q_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + endcase + + + // + // uOP Conditional Execution Logic + // + reg uop_exec_effective; + + always @(*) + // + case (uop_exec) + UOP_EXEC_ALWAYS: uop_exec_effective = 1'b1; + UOP_EXEC_PZT1T2_0XX: uop_exec_effective = flag_pz_is_zero; + UOP_EXEC_PZT1T2_100: uop_exec_effective = !flag_pz_is_zero && flag_t1_is_zero && flag_t2_is_zero; + UOP_EXEC_PZT1T2_101: uop_exec_effective = !flag_pz_is_zero && flag_t1_is_zero && !flag_t2_is_zero; + endcase + + + // + // uOP Destination Store Logic + // + reg uop_dst_wren; + + always @(*) + // + case (uop_opcode) + // + OPCODE_MOV: uop_dst_wren = mw_mov_wren_y & uop_exec_effective; + OPCODE_ADD: uop_dst_wren = mod_add_wren_s; + OPCODE_SUB: uop_dst_wren = mod_sub_wren_d; + OPCODE_MUL: uop_dst_wren = mod_mul_wren_p; + default: uop_dst_wren = 1'b0; + // + endcase + + + always @(*) begin + // + // + // + if (uop_src_a == UOP_SRC_PX) px_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_PX) px_addr = uop_src_b_addr; + else px_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_PY) py_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_PY) py_addr = uop_src_b_addr; + else py_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_PZ) pz_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_PZ) pz_addr = uop_src_b_addr; + else pz_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_src_a == UOP_SRC_ONE) brom_one_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_ONE) brom_one_addr = uop_src_b_addr; + else brom_one_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + //if (uop_src_a == UOP_SRC_ZERO) brom_zero_addr = uop_src_a_addr; + //else if (uop_src_b == UOP_SRC_ZERO) brom_zero_addr = uop_src_b_addr; + //else brom_zero_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_DELTA) brom_delta_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_DELTA) brom_delta_addr = uop_src_b_addr; + else brom_delta_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_src_a == UOP_SRC_G_X) gx_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_G_X) gx_addr = uop_src_b_addr; + else gx_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_G_Y) gy_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_G_Y) gy_addr = uop_src_b_addr; + else gy_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_src_a == UOP_SRC_H_X) hx_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_H_X) hx_addr = uop_src_b_addr; + else hx_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_H_Y) hy_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_H_Y) hy_addr = uop_src_b_addr; + else hy_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_src_a == UOP_SRC_V) v_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_V) v_addr = uop_src_b_addr; + else v_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_src_a == UOP_SRC_T1) bram_t1_rd_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_T1) bram_t1_rd_addr = uop_src_b_addr; + else bram_t1_rd_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_T2) bram_t2_rd_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_T2) bram_t2_rd_addr = uop_src_b_addr; + else bram_t2_rd_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_T3) bram_t3_rd_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_T3) bram_t3_rd_addr = uop_src_b_addr; + else bram_t3_rd_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_src_a == UOP_SRC_T4) bram_t4_rd_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_T4) bram_t4_rd_addr = uop_src_b_addr; + else bram_t4_rd_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if (uop_dst == UOP_DST_T1) bram_t1_wr_addr = uop_dst_addr; + else bram_t1_wr_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_dst == UOP_DST_T2) bram_t2_wr_addr = uop_dst_addr; + else bram_t2_wr_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_dst == UOP_DST_T3) bram_t3_wr_addr = uop_dst_addr; + else bram_t3_wr_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + if (uop_dst == UOP_DST_T4) bram_t4_wr_addr = uop_dst_addr; + else bram_t4_wr_addr = {WORD_COUNTER_WIDTH{1'bX}}; + // + // + // + if ((uop_dst == UOP_DST_RX) && (uop_dst_wren)) rx_addr = uop_dst_addr; + else begin + if (uop_src_a == UOP_SRC_RX) rx_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_RX) rx_addr = uop_src_b_addr; + else rx_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + if ((uop_dst == UOP_DST_RY) && (uop_dst_wren)) ry_addr = uop_dst_addr; + else begin + if (uop_src_a == UOP_SRC_RY) ry_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_RY) ry_addr = uop_src_b_addr; + else ry_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + if ((uop_dst == UOP_DST_RZ) && (uop_dst_wren)) rz_addr = uop_dst_addr; + else begin + if (uop_src_a == UOP_SRC_RZ) rz_addr = uop_src_a_addr; + else if (uop_src_b == UOP_SRC_RZ) rz_addr = uop_src_b_addr; + else rz_addr = {WORD_COUNTER_WIDTH{1'bX}}; + end + // + end + + + assign rx_wren = uop_dst_wren && (uop_dst == UOP_DST_RX); + assign ry_wren = uop_dst_wren && (uop_dst == UOP_DST_RY); + assign rz_wren = uop_dst_wren && (uop_dst == UOP_DST_RZ); + + assign bram_t1_wr_en = uop_dst_wren && (uop_dst == UOP_DST_T1); + assign bram_t2_wr_en = uop_dst_wren && (uop_dst == UOP_DST_T2); + assign bram_t3_wr_en = uop_dst_wren && (uop_dst == UOP_DST_T3); + assign bram_t4_wr_en = uop_dst_wren && (uop_dst == UOP_DST_T4); + + + + // + // Destination Value Selector + // + reg [31: 0] uop_dst_value; + + always @(*) + // + case (uop_opcode) + + OPCODE_MOV: uop_dst_value = mw_mov_dout_y; + OPCODE_ADD: uop_dst_value = mod_add_dout_s; + OPCODE_SUB: uop_dst_value = mod_sub_dout_d; + OPCODE_MUL: uop_dst_value = mod_mul_dout_p; + + default: uop_dst_value = {32{1'bX}}; + + endcase + + assign rx_dout = uop_dst_value; + assign ry_dout = uop_dst_value; + assign rz_dout = uop_dst_value; + + assign bram_t1_wr_data = uop_dst_value; + assign bram_t2_wr_data = uop_dst_value; + assign bram_t3_wr_data = uop_dst_value; + assign bram_t4_wr_data = uop_dst_value; + + + // + // Latch Comparison Flags + // + always @(posedge clk) + // + if ( (fsm_state == FSM_STATE_EXECUTE) && + (uop_opcode == OPCODE_CMP) && + (uop_done && !uop_trig) ) begin + + if ( (uop_src_a == UOP_SRC_PZ) && (uop_src_b == UOP_SRC_ZERO) ) + flag_pz_is_zero <= !mw_cmp_out_l && mw_cmp_out_e && !mw_cmp_out_g; + + if ( (uop_src_a == UOP_SRC_T1) && (uop_src_b == UOP_SRC_ZERO) ) + flag_t1_is_zero <= !mw_cmp_out_l && mw_cmp_out_e && !mw_cmp_out_g; + + if ( (uop_src_a == UOP_SRC_T2) && (uop_src_b == UOP_SRC_ZERO) ) + flag_t2_is_zero <= !mw_cmp_out_l && mw_cmp_out_e && !mw_cmp_out_g; + + end + + + // + // Ready Flag Logic + // + reg rdy_reg = 1'b1; + assign rdy = rdy_reg; + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) rdy_reg <= 1'b1; + else begin + + /* clear flag */ + if (fsm_state == FSM_STATE_STALL) + if (ena) rdy_reg <= 1'b0; + + /* set flag */ + if ((fsm_state == FSM_STATE_EXECUTE) && !uop_trig && uop_done) + if (uop_opcode == OPCODE_RDY) rdy_reg <= 1'b1; + + end + + +endmodule + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ diff --git a/rtl/curve/point_mul_256.v b/rtl/curve/point_mul_256.v new file mode 100644 index 0000000..6c24d65 --- /dev/null +++ b/rtl/curve/point_mul_256.v @@ -0,0 +1,849 @@ +//------------------------------------------------------------------------------ +// +// point_mul_256.v +// ----------------------------------------------------------------------------- +// Elliptic curve point scalar multiplier. +// +// Authors: Pavel Shatov +// +// Copyright (c) 2018, NORDUnet A/S +// +// 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 point_mul_256 + ( + clk, rst_n, + ena, rdy, + k_addr, qx_addr, qy_addr, rx_addr, ry_addr, + rx_wren, ry_wren, + k_din, qx_din, qy_din, + rx_dout, ry_dout + ); + + + // + // Constants + // + localparam WORD_COUNTER_WIDTH = 3; // 0 .. 7 + localparam OPERAND_NUM_WORDS = 8; // 8 * 32 = 256 + + + // + // Ports + // + input wire clk; // system clock + input wire rst_n; // active-low async reset + + input wire ena; // enable input + output wire rdy; // ready output + + output wire [ 2: 0] k_addr; + output wire [ 2: 0] qx_addr; + output wire [ 2: 0] qy_addr; + output wire [ 2: 0] rx_addr; + output wire [ 2: 0] ry_addr; + + output wire rx_wren; + output wire ry_wren; + + input wire [31: 0] k_din; + input wire [31: 0] qx_din; + input wire [31: 0] qy_din; + + output wire [31: 0] rx_dout; + output wire [31: 0] ry_dout; + + + // + // Temporary Variables + // + reg [ 2: 0] bram_tx_wr_addr; + reg [ 2: 0] bram_ty_wr_addr; + reg [ 2: 0] bram_tz_wr_addr; + + reg [ 2: 0] bram_rx_wr_addr; + reg [ 2: 0] bram_ry_wr_addr; + reg [ 2: 0] bram_rz_wr_addr; + wire [ 2: 0] bram_rz1_wr_addr; + + wire [ 2: 0] bram_hx_wr_addr; + wire [ 2: 0] bram_hy_wr_addr; + + reg [ 2: 0] bram_tx_rd_addr; + reg [ 2: 0] bram_ty_rd_addr; + reg [ 2: 0] bram_tz_rd_addr; + + reg [ 2: 0] bram_rx_rd_addr; + reg [ 2: 0] bram_ry_rd_addr; + reg [ 2: 0] bram_rz_rd_addr; + wire [ 2: 0] bram_rz1_rd_addr; + + wire [ 2: 0] bram_hx_rd_addr; + wire [ 2: 0] bram_hy_rd_addr; + + reg bram_tx_wr_en; + reg bram_ty_wr_en; + reg bram_tz_wr_en; + + reg bram_rx_wr_en; + reg bram_ry_wr_en; + reg bram_rz_wr_en; + wire bram_rz1_wr_en; + + wire bram_hx_wr_en; + wire bram_hy_wr_en; + + wire [31: 0] bram_tx_rd_data; + wire [31: 0] bram_ty_rd_data; + wire [31: 0] bram_tz_rd_data; + + wire [31: 0] bram_rx_rd_data; + wire [31: 0] bram_ry_rd_data; + wire [31: 0] bram_rz_rd_data; + wire [31: 0] bram_rz1_rd_data; + + wire [31: 0] bram_hx_rd_data; + wire [31: 0] bram_hy_rd_data; + + reg [31: 0] bram_tx_wr_data_in; + reg [31: 0] bram_ty_wr_data_in; + reg [31: 0] bram_tz_wr_data_in; + + reg [31: 0] bram_rx_wr_data_in; + reg [31: 0] bram_ry_wr_data_in; + reg [31: 0] bram_rz_wr_data_in; + wire [31: 0] bram_rz1_wr_data_in; + + wire [31: 0] bram_hx_wr_data_in; + wire [31: 0] bram_hy_wr_data_in; + + wire [31: 0] bram_tx_wr_data_out; + wire [31: 0] bram_ty_wr_data_out; + wire [31: 0] bram_tz_wr_data_out; + + wire [31: 0] bram_rx_wr_data_out; + wire [31: 0] bram_ry_wr_data_out; + wire [31: 0] bram_rz_wr_data_out; + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_tx (.clk(clk), + .a_addr(bram_tx_wr_addr), .a_wr(bram_tx_wr_en), .a_in(bram_tx_wr_data_in), .a_out(bram_tx_wr_data_out), + .b_addr(bram_tx_rd_addr), .b_out(bram_tx_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_ty (.clk(clk), + .a_addr(bram_ty_wr_addr), .a_wr(bram_ty_wr_en), .a_in(bram_ty_wr_data_in), .a_out(bram_ty_wr_data_out), + .b_addr(bram_ty_rd_addr), .b_out(bram_ty_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_tz (.clk(clk), + .a_addr(bram_tz_wr_addr), .a_wr(bram_tz_wr_en), .a_in(bram_tz_wr_data_in), .a_out(bram_tz_wr_data_out), + .b_addr(bram_tz_rd_addr), .b_out(bram_tz_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_rx (.clk(clk), + .a_addr(bram_rx_wr_addr), .a_wr(bram_rx_wr_en), .a_in(bram_rx_wr_data_in), .a_out(bram_rx_wr_data_out), + .b_addr(bram_rx_rd_addr), .b_out(bram_rx_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_ry (.clk(clk), + .a_addr(bram_ry_wr_addr), .a_wr(bram_ry_wr_en), .a_in(bram_ry_wr_data_in), .a_out(bram_ry_wr_data_out), + .b_addr(bram_ry_rd_addr), .b_out(bram_ry_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_rz (.clk(clk), + .a_addr(bram_rz_wr_addr), .a_wr(bram_rz_wr_en), .a_in(bram_rz_wr_data_in), .a_out(bram_rz_wr_data_out), + .b_addr(bram_rz_rd_addr), .b_out(bram_rz_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_rz1 (.clk(clk), + .a_addr(bram_rz1_wr_addr), .a_wr(bram_rz1_wr_en), .a_in(bram_rz1_wr_data_in), .a_out(), + .b_addr(bram_rz1_rd_addr), .b_out(bram_rz1_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_hx (.clk(clk), + .a_addr(bram_hx_wr_addr), .a_wr(bram_hx_wr_en), .a_in(bram_hx_wr_data_in), .a_out(), + .b_addr(bram_hx_rd_addr), .b_out(bram_hx_rd_data)); + + bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3)) + bram_hy (.clk(clk), + .a_addr(bram_hy_wr_addr), .a_wr(bram_hy_wr_en), .a_in(bram_hy_wr_data_in), .a_out(), + .b_addr(bram_hy_rd_addr), .b_out(bram_hy_rd_data)); + + + // + // FSM + // + localparam [ 4: 0] FSM_STATE_IDLE = 5'd00; + + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_PREPARE_TRIG = {1'b0, 4'd01}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_PREPARE_WAIT = {1'b0, 4'd02}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_DOUBLE_TRIG = {1'b0, 4'd03}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_DOUBLE_WAIT = {1'b0, 4'd04}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_COPY_TRIG = {1'b0, 4'd05}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_COPY_WAIT = {1'b0, 4'd06}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_INVERT_TRIG = {1'b0, 4'd07}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_INVERT_WAIT = {1'b0, 4'd08}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_CONVERT_TRIG = {1'b0, 4'd09}; + localparam [ 4: 0] FSM_STATE_PRECOMPUTE_CONVERT_WAIT = {1'b0, 4'd10}; + + localparam [ 4: 0] FSM_STATE_MULTIPLY_PREPARE_TRIG = {1'b1, 4'd01}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_PREPARE_WAIT = {1'b1, 4'd02}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_DOUBLE_TRIG = {1'b1, 4'd03}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_DOUBLE_WAIT = {1'b1, 4'd04}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_ADD_TRIG = {1'b1, 4'd05}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_ADD_WAIT = {1'b1, 4'd06}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_COPY_TRIG = {1'b1, 4'd07}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_COPY_WAIT = {1'b1, 4'd08}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_INVERT_TRIG = {1'b1, 4'd09}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_INVERT_WAIT = {1'b1, 4'd10}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_CONVERT_TRIG = {1'b1, 4'd11}; + localparam [ 4: 0] FSM_STATE_MULTIPLY_CONVERT_WAIT = {1'b1, 4'd12}; + + localparam [ 4: 0] FSM_STATE_DONE = 5'd31; + + reg [4:0] fsm_state = FSM_STATE_IDLE; + + + // + // Round Counter + // + reg [ 7: 0] bit_counter; + wire [ 7: 0] bit_counter_max = 8'd255; + wire [ 7: 0] bit_counter_zero = 8'd0; + wire [ 7: 0] bit_counter_next = + (bit_counter < bit_counter_max) ? bit_counter + 1'b1 : bit_counter_zero; + + + // + // Round Completion + // + wire [ 4: 0] fsm_state_round_next = (bit_counter < bit_counter_max) ? + FSM_STATE_MULTIPLY_DOUBLE_TRIG : FSM_STATE_MULTIPLY_INVERT_TRIG; + + + // + // OP Trigger Logic + // + reg op_trig; + wire op_done; + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) op_trig <= 1'b0; + else case (fsm_state) + FSM_STATE_PRECOMPUTE_PREPARE_TRIG, + FSM_STATE_PRECOMPUTE_DOUBLE_TRIG, + FSM_STATE_PRECOMPUTE_CONVERT_TRIG, + FSM_STATE_MULTIPLY_PREPARE_TRIG, + FSM_STATE_MULTIPLY_DOUBLE_TRIG, + FSM_STATE_MULTIPLY_ADD_TRIG, + FSM_STATE_MULTIPLY_CONVERT_TRIG: op_trig <= 1'b1; + default: op_trig <= 1'b0; + endcase + + // + // Microprograms + // + wire [ 5: 0] op_rom_addr; + wire [19: 0] op_rom_init_data; + wire [19: 0] op_rom_dbl_data; + wire [19: 0] op_rom_add_data; + wire [19: 0] op_rom_conv_data; + wire [19: 0] op_rom_init_ecdh_data; + reg [19: 0] op_rom_mux_data; + + (* RAM_STYLE="BLOCK" *) + uop_init_rom op_rom_init + ( + .clk (clk), + .addr (op_rom_addr), + .data (op_rom_init_data) + ); + + (* RAM_STYLE="BLOCK" *) + uop_dbl_rom op_rom_dbl + ( + .clk (clk), + .addr (op_rom_addr), + .data (op_rom_dbl_data) + ); + + (* RAM_STYLE="BLOCK" *) + uop_add_rom op_rom_add + ( + .clk (clk), + .addr (op_rom_addr), + .data (op_rom_add_data) + ); + + (* RAM_STYLE="BLOCK" *) + uop_conv_rom op_rom_conv + ( + .clk (clk), + .addr (op_rom_addr), + .data (op_rom_conv_data) + ); + + (* RAM_STYLE="BLOCK" *) + uop_init_rom_ecdh op_rom_conv_ecdh + ( + .clk (clk), + .addr (op_rom_addr), + .data (op_rom_init_ecdh_data) + ); + + always @(*) + // + case (fsm_state) + FSM_STATE_PRECOMPUTE_PREPARE_WAIT: op_rom_mux_data = op_rom_init_ecdh_data; + FSM_STATE_MULTIPLY_PREPARE_WAIT: op_rom_mux_data = op_rom_init_data; + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT, + FSM_STATE_MULTIPLY_DOUBLE_WAIT: op_rom_mux_data = op_rom_dbl_data; + FSM_STATE_MULTIPLY_ADD_WAIT: op_rom_mux_data = op_rom_add_data; + FSM_STATE_PRECOMPUTE_CONVERT_WAIT, + FSM_STATE_MULTIPLY_CONVERT_WAIT: op_rom_mux_data = op_rom_conv_data; + default: op_rom_mux_data = {20{1'bX}}; + endcase + + + + // + // Modulus + // + reg [ 2: 0] rom_q_addr; + wire [31: 0] rom_q_data; + + brom_p256_q rom_q + ( + .clk (clk), + .b_addr (rom_q_addr), + .b_out (rom_q_data) + ); + + + // + // Worker + // + wire [ 2: 0] worker_addr_px; + wire [ 2: 0] worker_addr_py; + wire [ 2: 0] worker_addr_pz; + + wire [ 2: 0] worker_addr_rx; + wire [ 2: 0] worker_addr_ry; + wire [ 2: 0] worker_addr_rz; + + wire [ 2: 0] worker_addr_q; + + wire worker_wren_rx; + wire worker_wren_ry; + wire worker_wren_rz; + + reg [31: 0] worker_din_px; + reg [31: 0] worker_din_py; + reg [31: 0] worker_din_pz; + + reg [31: 0] worker_din_rx; + reg [31: 0] worker_din_ry; + reg [31: 0] worker_din_rz; + + wire [31: 0] worker_dout_rx; + wire [31: 0] worker_dout_ry; + wire [31: 0] worker_dout_rz; + + point_dbl_add_256 worker + ( + .clk (clk), + .rst_n (rst_n), + + .ena (op_trig), + .rdy (op_done), + + .uop_addr (op_rom_addr), + .uop (op_rom_mux_data), + + .gx_addr (qx_addr), + .gy_addr (qy_addr), + + .hx_addr (bram_hx_rd_addr), + .hy_addr (bram_hy_rd_addr), + + .px_addr (worker_addr_px), + .py_addr (worker_addr_py), + .pz_addr (worker_addr_pz), + + .rx_addr (worker_addr_rx), + .ry_addr (worker_addr_ry), + .rz_addr (worker_addr_rz), + + .q_addr (worker_addr_q), + + .v_addr (bram_rz1_rd_addr), + + .rx_wren (worker_wren_rx), + .ry_wren (worker_wren_ry), + .rz_wren (worker_wren_rz), + + .gx_din (qx_din), + .gy_din (qy_din), + + .hx_din (bram_hx_rd_data), + .hy_din (bram_hy_rd_data), + + .px_din (worker_din_px), + .py_din (worker_din_py), + .pz_din (worker_din_pz), + + .rx_din (worker_din_rx), + .ry_din (worker_din_ry), + .rz_din (worker_din_rz), + + .rx_dout (worker_dout_rx), + .ry_dout (worker_dout_ry), + .rz_dout (worker_dout_rz), + + .q_din (rom_q_data), + + .v_din (bram_rz1_rd_data) + ); + + + // + // Mover + // + reg move_trig; + wire move_done; + + wire [ 2: 0] mover_addr_x; + wire [ 2: 0] mover_addr_y; + + wire mover_wren_y; + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) move_trig <= 1'b0; + else case (fsm_state) + FSM_STATE_PRECOMPUTE_COPY_TRIG, + FSM_STATE_MULTIPLY_COPY_TRIG: move_trig <= 1'b1; + default: move_trig <= 1'b0; + endcase + + mw_mover # + ( + .WORD_COUNTER_WIDTH (3), + .OPERAND_NUM_WORDS (8) + ) + mover + ( + .clk (clk), + .rst_n (rst_n), + + .ena (move_trig), + .rdy (move_done), + + .x_addr (mover_addr_x), + .y_addr (mover_addr_y), + .y_wren (mover_wren_y), + + .x_din ({32{1'bX}}), + .y_dout () + ); + + + // + // Invertor + // + reg invert_trig; + wire invert_done; + + wire [ 2: 0] invertor_addr_a; + wire [ 2: 0] invertor_addr_q; + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) invert_trig <= 1'b0; + else case (fsm_state) + FSM_STATE_PRECOMPUTE_INVERT_TRIG, + FSM_STATE_MULTIPLY_INVERT_TRIG: invert_trig <= 1'b1; + default: invert_trig <= 1'b0; + endcase + + modular_invertor # + ( + .MAX_OPERAND_WIDTH(256) + ) + invertor + ( + .clk (clk), + .rst_n (rst_n), + + .ena (invert_trig), + .rdy (invert_done), + + .a_addr (invertor_addr_a), + .q_addr (invertor_addr_q), + .a1_addr (bram_rz1_wr_addr), + .a1_wren (bram_rz1_wr_en), + + .a_din (bram_rz_rd_data), + .q_din (rom_q_data), + .a1_dout (bram_rz1_wr_data_in) + ); + + + // + // FSM Transition Logic + // + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) fsm_state <= FSM_STATE_IDLE; + else case (fsm_state) + + FSM_STATE_IDLE: fsm_state <= ena ? FSM_STATE_PRECOMPUTE_PREPARE_TRIG : FSM_STATE_IDLE; + + FSM_STATE_PRECOMPUTE_PREPARE_TRIG: fsm_state <= FSM_STATE_PRECOMPUTE_PREPARE_WAIT; + FSM_STATE_PRECOMPUTE_PREPARE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_PRECOMPUTE_DOUBLE_TRIG : FSM_STATE_PRECOMPUTE_PREPARE_WAIT; + + FSM_STATE_PRECOMPUTE_DOUBLE_TRIG: fsm_state <= FSM_STATE_PRECOMPUTE_DOUBLE_WAIT; + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_PRECOMPUTE_COPY_TRIG : FSM_STATE_PRECOMPUTE_DOUBLE_WAIT; + + FSM_STATE_PRECOMPUTE_COPY_TRIG: fsm_state <= FSM_STATE_PRECOMPUTE_COPY_WAIT; + FSM_STATE_PRECOMPUTE_COPY_WAIT: fsm_state <= (!move_trig && move_done) ? FSM_STATE_PRECOMPUTE_INVERT_TRIG : FSM_STATE_PRECOMPUTE_COPY_WAIT; + + FSM_STATE_PRECOMPUTE_INVERT_TRIG: fsm_state <= FSM_STATE_PRECOMPUTE_INVERT_WAIT; + FSM_STATE_PRECOMPUTE_INVERT_WAIT: fsm_state <= (!invert_trig && invert_done) ? FSM_STATE_PRECOMPUTE_CONVERT_TRIG : FSM_STATE_PRECOMPUTE_INVERT_WAIT; + + FSM_STATE_PRECOMPUTE_CONVERT_TRIG: fsm_state <= FSM_STATE_PRECOMPUTE_CONVERT_WAIT; + FSM_STATE_PRECOMPUTE_CONVERT_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_MULTIPLY_PREPARE_TRIG : FSM_STATE_PRECOMPUTE_CONVERT_WAIT; + + FSM_STATE_MULTIPLY_PREPARE_TRIG: fsm_state <= FSM_STATE_MULTIPLY_PREPARE_WAIT; + FSM_STATE_MULTIPLY_PREPARE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_MULTIPLY_DOUBLE_TRIG : FSM_STATE_MULTIPLY_PREPARE_WAIT; + + FSM_STATE_MULTIPLY_DOUBLE_TRIG: fsm_state <= FSM_STATE_MULTIPLY_DOUBLE_WAIT; + FSM_STATE_MULTIPLY_DOUBLE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_MULTIPLY_ADD_TRIG : FSM_STATE_MULTIPLY_DOUBLE_WAIT; + + FSM_STATE_MULTIPLY_ADD_TRIG: fsm_state <= FSM_STATE_MULTIPLY_ADD_WAIT; + FSM_STATE_MULTIPLY_ADD_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_MULTIPLY_COPY_TRIG : FSM_STATE_MULTIPLY_ADD_WAIT; + + FSM_STATE_MULTIPLY_COPY_TRIG: fsm_state <= FSM_STATE_MULTIPLY_COPY_WAIT; + FSM_STATE_MULTIPLY_COPY_WAIT: fsm_state <= (!move_trig && move_done) ? fsm_state_round_next : FSM_STATE_MULTIPLY_COPY_WAIT; + + FSM_STATE_MULTIPLY_INVERT_TRIG: fsm_state <= FSM_STATE_MULTIPLY_INVERT_WAIT; + FSM_STATE_MULTIPLY_INVERT_WAIT: fsm_state <= (!invert_trig && invert_done) ? FSM_STATE_MULTIPLY_CONVERT_TRIG : FSM_STATE_MULTIPLY_INVERT_WAIT; + + FSM_STATE_MULTIPLY_CONVERT_TRIG: fsm_state <= FSM_STATE_MULTIPLY_CONVERT_WAIT; + FSM_STATE_MULTIPLY_CONVERT_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_DONE : FSM_STATE_MULTIPLY_CONVERT_WAIT; + + FSM_STATE_DONE: fsm_state <= FSM_STATE_IDLE; + + default: fsm_state <= FSM_STATE_IDLE; + + endcase + + + // + // Bit Counter Increment + // + always @(posedge clk) begin + // + if ((fsm_state == FSM_STATE_MULTIPLY_PREPARE_WAIT) && !op_trig && op_done) + bit_counter <= bit_counter_zero; + // + if ((fsm_state == FSM_STATE_MULTIPLY_COPY_WAIT) && !move_trig && move_done) + bit_counter <= bit_counter_next; + // + end + + + // + // K Latch Logic + // + reg [ 2: 0] k_addr_reg; + reg [31: 0] k_din_reg; + + assign k_addr = k_addr_reg; + + always @(posedge clk) begin + // + if (fsm_state == FSM_STATE_MULTIPLY_DOUBLE_TRIG) + k_addr_reg <= 3'd7 - bit_counter[7:5]; + // + if (fsm_state == FSM_STATE_MULTIPLY_ADD_TRIG) + k_din_reg <= (bit_counter[4:0] == 5'd0) ? k_din : {k_din_reg[30:0], 1'bX}; + // + end + + + + // + // Copy Inhibit Logic + // + wire move_inhibit = k_din_reg[31]; + + reg copy_t2r_int; + + always @* + // + case (fsm_state) + FSM_STATE_PRECOMPUTE_COPY_WAIT: copy_t2r_int = 1'b1; + FSM_STATE_MULTIPLY_COPY_WAIT: copy_t2r_int = mover_wren_y & ~move_inhibit; + default: copy_t2r_int = 1'b0; + endcase + + + always @(*) begin + // + // Q + // + case (fsm_state) + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT, + FSM_STATE_MULTIPLY_DOUBLE_WAIT: rom_q_addr = worker_addr_q; + FSM_STATE_MULTIPLY_ADD_WAIT: rom_q_addr = worker_addr_q; + FSM_STATE_PRECOMPUTE_INVERT_WAIT, + FSM_STATE_MULTIPLY_INVERT_WAIT: rom_q_addr = invertor_addr_q; + FSM_STATE_PRECOMPUTE_CONVERT_WAIT, + FSM_STATE_MULTIPLY_CONVERT_WAIT: rom_q_addr = worker_addr_q; + default: rom_q_addr = worker_addr_q; + endcase + + // + // R(X,Y,Z) + // + case (fsm_state) + // + FSM_STATE_PRECOMPUTE_PREPARE_WAIT, + FSM_STATE_MULTIPLY_PREPARE_WAIT: begin + // + bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}}; + bram_rx_wr_addr <= worker_addr_rx; bram_ry_wr_addr <= worker_addr_ry; bram_rz_wr_addr <= worker_addr_rz; + bram_rx_wr_en <= worker_wren_rx; bram_ry_wr_en <= worker_wren_ry; bram_rz_wr_en <= worker_wren_rz; + bram_rx_wr_data_in <= worker_dout_rx; bram_ry_wr_data_in <= worker_dout_ry; bram_rz_wr_data_in <= worker_dout_rz; + // + end + // + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT, + FSM_STATE_MULTIPLY_DOUBLE_WAIT: begin + // + bram_rx_rd_addr <= worker_addr_px; bram_ry_rd_addr <= worker_addr_py; bram_rz_rd_addr <= worker_addr_pz; + bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}}; + bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0; + bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}}; + // + end + // + FSM_STATE_MULTIPLY_ADD_WAIT: begin + // + bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}}; + bram_rx_wr_addr <= worker_addr_rx; bram_ry_wr_addr <= worker_addr_ry; bram_rz_wr_addr <= worker_addr_rz; + bram_rx_wr_en <= worker_wren_rx; bram_ry_wr_en <= worker_wren_ry; bram_rz_wr_en <= worker_wren_rz; + bram_rx_wr_data_in <= worker_dout_rx; bram_ry_wr_data_in <= worker_dout_ry; bram_rz_wr_data_in <= worker_dout_rz; + // + end + // + FSM_STATE_PRECOMPUTE_COPY_WAIT, + FSM_STATE_MULTIPLY_COPY_WAIT: begin + // + bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}}; + bram_rx_wr_addr <= mover_addr_y; bram_ry_wr_addr <= mover_addr_y; bram_rz_wr_addr <= mover_addr_y; + bram_rx_wr_en <= copy_t2r_int; bram_ry_wr_en <= copy_t2r_int; bram_rz_wr_en <= copy_t2r_int; + bram_rx_wr_data_in <= bram_tx_rd_data; bram_ry_wr_data_in <= bram_ty_rd_data; bram_rz_wr_data_in <= bram_tz_rd_data; + // + end + // + FSM_STATE_PRECOMPUTE_INVERT_WAIT, + FSM_STATE_MULTIPLY_INVERT_WAIT: begin + // + bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= invertor_addr_a; + bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}}; + bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0; + bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}}; + // + end + // + FSM_STATE_PRECOMPUTE_CONVERT_WAIT, + FSM_STATE_MULTIPLY_CONVERT_WAIT: begin + // + bram_rx_rd_addr <= worker_addr_px; bram_ry_rd_addr <= worker_addr_py; bram_rz_rd_addr <= worker_addr_pz; + bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}}; + bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0; + bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}}; + // + end + + // + default: begin + // + bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}}; + bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}}; + bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0; + bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}}; + // + end + // + endcase + // + // T(X,Y,Z) + // + case (fsm_state) + // + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT, + FSM_STATE_MULTIPLY_DOUBLE_WAIT: begin + // + bram_tx_rd_addr <= {3{1'bX}}; bram_ty_rd_addr <= {3{1'bX}}; bram_tz_rd_addr <= {3{1'bX}}; + bram_tx_wr_addr <= worker_addr_rx; bram_ty_wr_addr <= worker_addr_ry; bram_tz_wr_addr <= worker_addr_rz; + bram_tx_wr_en <= worker_wren_rx; bram_ty_wr_en <= worker_wren_ry; bram_tz_wr_en <= worker_wren_rz; + bram_tx_wr_data_in <= worker_dout_rx; bram_ty_wr_data_in <= worker_dout_ry; bram_tz_wr_data_in <= worker_dout_rz; + // + end + // + FSM_STATE_MULTIPLY_ADD_WAIT: begin + // + bram_tx_rd_addr <= worker_addr_px; bram_ty_rd_addr <= worker_addr_py; bram_tz_rd_addr <= worker_addr_pz; + bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}}; + bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0; + bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}}; + // + end + // + FSM_STATE_PRECOMPUTE_COPY_WAIT, + FSM_STATE_MULTIPLY_COPY_WAIT: begin + // + bram_tx_rd_addr <= mover_addr_x; bram_ty_rd_addr <= mover_addr_x; bram_tz_rd_addr <= mover_addr_x; + bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}}; + bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0; + bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}}; + // + end + + // + default: begin + // + bram_tx_rd_addr <= {3{1'bX}}; bram_ty_rd_addr <= {3{1'bX}}; bram_tz_rd_addr <= {3{1'bX}}; + bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}}; + bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0; + bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}}; + // + end + // + endcase + // + // Worker + // + case (fsm_state) + // + FSM_STATE_PRECOMPUTE_DOUBLE_WAIT, + FSM_STATE_MULTIPLY_DOUBLE_WAIT: begin + // + worker_din_px <= bram_rx_rd_data; worker_din_py <= bram_ry_rd_data; worker_din_pz <= bram_rz_rd_data; + worker_din_rx <= bram_tx_wr_data_out; worker_din_ry <= bram_ty_wr_data_out; worker_din_rz <= bram_tz_wr_data_out; + // + end + // + FSM_STATE_MULTIPLY_ADD_WAIT: begin + // + worker_din_px <= bram_tx_rd_data; worker_din_py <= bram_ty_rd_data; worker_din_pz <= bram_tz_rd_data; + worker_din_rx <= bram_rx_wr_data_out; worker_din_ry <= bram_ry_wr_data_out; worker_din_rz <= bram_rz_wr_data_out; + // + end + // + FSM_STATE_PRECOMPUTE_CONVERT_WAIT, + FSM_STATE_MULTIPLY_CONVERT_WAIT: begin + // + worker_din_px <= bram_rx_rd_data; worker_din_py <= bram_ry_rd_data; worker_din_pz <= bram_rz_rd_data; + worker_din_rx <= {32{1'bX}}; worker_din_ry <= {32{1'bX}}; worker_din_rz <= {32{1'bX}}; + // + end + // + default: begin + // + worker_din_px <= {32{1'bX}}; worker_din_py <= {32{1'bX}}; worker_din_pz <= {32{1'bX}}; + worker_din_rx <= {32{1'bX}}; worker_din_ry <= {32{1'bX}}; worker_din_rz <= {32{1'bX}}; + // + end + // + endcase + // + end + + + // + // Internal Mapping + // + assign bram_hx_wr_en = worker_wren_rx && (fsm_state == FSM_STATE_PRECOMPUTE_CONVERT_WAIT); + assign bram_hy_wr_en = worker_wren_ry && (fsm_state == FSM_STATE_PRECOMPUTE_CONVERT_WAIT); + + assign bram_hx_wr_data_in = worker_dout_rx; + assign bram_hy_wr_data_in = worker_dout_ry; + + assign bram_hx_wr_addr = worker_addr_rx; + assign bram_hy_wr_addr = worker_addr_ry; + + + + // + // Output Mapping + // + assign rx_wren = worker_wren_rx && (fsm_state == FSM_STATE_MULTIPLY_CONVERT_WAIT); + assign ry_wren = worker_wren_ry && (fsm_state == FSM_STATE_MULTIPLY_CONVERT_WAIT); + + assign rx_dout = worker_dout_rx; + assign ry_dout = worker_dout_ry; + + assign rx_addr = worker_addr_rx; + assign ry_addr = worker_addr_ry; + + + // + // Ready Flag Logic + // + reg rdy_reg = 1'b1; + assign rdy = rdy_reg; + + always @(posedge clk or negedge rst_n) + + if (rst_n == 1'b0) rdy_reg <= 1'b1; + else begin + + /* clear flag */ + if ((fsm_state == FSM_STATE_IDLE) && ena) + rdy_reg <= 1'b0; + + /* set flag */ + if (fsm_state == FSM_STATE_DONE) + rdy_reg <= 1'b1; + + end + + +endmodule + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ diff --git a/rtl/ecdhp256.v b/rtl/ecdhp256.v new file mode 100644 index 0000000..ec2dbbe --- /dev/null +++ b/rtl/ecdhp256.v @@ -0,0 +1,192 @@ +//====================================================================== +// +// Copyright (c) 2018, 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. +// +//====================================================================== + +`timescale 1ns / 1ps + +module ecdhp256 + ( + input wire clk, + input wire rst_n, + + input wire next, + output wire valid, + + input wire bus_cs, + input wire bus_we, + input wire [ 5:0] bus_addr, + input wire [31:0] bus_data_wr, + output wire [31:0] bus_data_rd + ); + + + // + // Memory Banks + // + localparam [2:0] BUS_ADDR_BANK_K = 3'd0; + localparam [2:0] BUS_ADDR_BANK_IN_X = 3'd1; + localparam [2:0] BUS_ADDR_BANK_IN_Y = 3'd2; + localparam [2:0] BUS_ADDR_BANK_OUT_X = 3'd3; + localparam [2:0] BUS_ADDR_BANK_OUT_Y = 3'd4; + + wire [2:0] bus_addr_upper = bus_addr[5:3]; + wire [2:0] bus_addr_lower = bus_addr[2:0]; + + + // + // Memories + // + + wire [31:0] user_rw_k_bram_out; + wire [31:0] user_rw_in_x_bram_out; + wire [31:0] user_rw_in_y_bram_out; + wire [31:0] user_ro_out_x_bram_out; + wire [31:0] user_ro_out_y_bram_out; + + wire [ 2:0] core_ro_k_bram_addr; + wire [ 2:0] core_ro_in_x_bram_addr; + wire [ 2:0] core_ro_in_y_bram_addr; + wire [ 2:0] core_rw_out_x_bram_addr; + wire [ 2:0] core_rw_out_y_bram_addr; + + wire core_rw_out_x_bram_wren; + wire core_rw_out_y_bram_wren; + + wire [31:0] core_ro_k_bram_dout; + wire [31:0] core_ro_in_x_bram_dout; + wire [31:0] core_ro_in_y_bram_dout; + wire [31:0] core_rw_out_x_bram_din; + wire [31:0] core_rw_out_y_bram_din; + + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(3) + ) + bram_k + ( .clk(clk), + .a_addr(bus_addr_lower), .a_out(user_rw_k_bram_out), .a_wr(bus_cs && bus_we && (bus_addr_upper == BUS_ADDR_BANK_K)), .a_in(bus_data_wr), + .b_addr(core_ro_k_bram_addr), .b_out(core_ro_k_bram_dout) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(3) + ) + bram_in_x + ( .clk(clk), + .a_addr(bus_addr_lower), .a_out(user_rw_in_x_bram_out), .a_wr(bus_cs && bus_we && (bus_addr_upper == BUS_ADDR_BANK_IN_X)), .a_in(bus_data_wr), + .b_addr(core_ro_in_x_bram_addr), .b_out(core_ro_in_x_bram_dout) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(3) + ) + bram_in_y + ( .clk(clk), + .a_addr(bus_addr_lower), .a_out(user_rw_in_y_bram_out), .a_wr(bus_cs && bus_we && (bus_addr_upper == BUS_ADDR_BANK_IN_Y)), .a_in(bus_data_wr), + .b_addr(core_ro_in_y_bram_addr), .b_out(core_ro_in_y_bram_dout) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(3) + ) + bram_out_x + ( .clk(clk), + .a_addr(core_rw_out_x_bram_addr), .a_out(), .a_wr(core_rw_out_x_bram_wren), .a_in(core_rw_out_x_bram_din), + .b_addr(bus_addr_lower), .b_out(user_ro_out_x_bram_out) + ); + + bram_1rw_1ro_readfirst # + ( .MEM_WIDTH(32), .MEM_ADDR_BITS(3) + ) + bram_out_y + ( .clk(clk), + .a_addr(core_rw_out_y_bram_addr), .a_out(), .a_wr(core_rw_out_y_bram_wren), .a_in(core_rw_out_y_bram_din), + .b_addr(bus_addr_lower), .b_out(user_ro_out_y_bram_out) + ); + + + // + // Curve Point Multiplier + // + reg next_dly; + + always @(posedge clk) next_dly <= next; + + wire next_trig = next && !next_dly; + + point_mul_256 point_multiplier_p256 + ( + .clk (clk), + .rst_n (rst_n), + + .ena (next_trig), + .rdy (valid), + + .k_addr (core_ro_k_bram_addr), + .qx_addr (core_ro_in_x_bram_addr), + .qy_addr (core_ro_in_y_bram_addr), + .rx_addr (core_rw_out_x_bram_addr), + .ry_addr (core_rw_out_y_bram_addr), + + .rx_wren (core_rw_out_x_bram_wren), + .ry_wren (core_rw_out_y_bram_wren), + + .k_din (core_ro_k_bram_dout), + .qx_din (core_ro_in_x_bram_dout), + .qy_din (core_ro_in_y_bram_dout), + .rx_dout (core_rw_out_x_bram_din), + .ry_dout (core_rw_out_y_bram_din) + ); + + // + // Output Selector + // + reg [2:0] bus_addr_upper_prev; + always @(posedge clk) bus_addr_upper_prev = bus_addr_upper; + + reg [31: 0] bus_data_rd_mux; + assign bus_data_rd = bus_data_rd_mux; + + always @(*) + // + case (bus_addr_upper_prev) + // + BUS_ADDR_BANK_K: bus_data_rd_mux = user_rw_k_bram_out; + BUS_ADDR_BANK_IN_X: bus_data_rd_mux = user_rw_in_x_bram_out; + BUS_ADDR_BANK_IN_Y: bus_data_rd_mux = user_rw_in_y_bram_out; + BUS_ADDR_BANK_OUT_X: bus_data_rd_mux = user_ro_out_x_bram_out; + BUS_ADDR_BANK_OUT_Y: bus_data_rd_mux = user_ro_out_y_bram_out; + // + default: bus_data_rd_mux = {32{1'b0}}; + // + endcase + +endmodule diff --git a/rtl/ecdhp256_wrapper.v b/rtl/ecdhp256_wrapper.v new file mode 100644 index 0000000..add1325 --- /dev/null +++ b/rtl/ecdhp256_wrapper.v @@ -0,0 +1,177 @@ +//====================================================================== +// +// Copyright (c) 2018, 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 ecdhp256_wrapper + ( + input wire clk, + input wire reset_n, + + input wire cs, + input wire we, + + input wire [6: 0] address, + input wire [31: 0] write_data, + output wire [31: 0] read_data + ); + + + // + // Address Decoder + // + localparam ADDR_MSB_REGS = 1'b0; + localparam ADDR_MSB_CORE = 1'b1; + + wire [0:0] addr_msb = address[6]; + wire [5:0] addr_lsb = address[5:0]; + + + // + // Output Mux + // + wire [31: 0] read_data_regs; + wire [31: 0] read_data_core; + + + // + // Registers + // + localparam ADDR_NAME0 = 5'h00; + localparam ADDR_NAME1 = 5'h01; + localparam ADDR_VERSION = 5'h02; + + localparam ADDR_CONTROL = 5'h08; // {next, init} + localparam ADDR_STATUS = 5'h09; // {valid, ready} + localparam ADDR_DUMMY = 5'h0F; // don't care + + // localparam CONTROL_INIT_BIT = 0; -- not used + localparam CONTROL_NEXT_BIT = 1; + + // localparam STATUS_READY_BIT = 0; -- hardcoded to always read 1 + localparam STATUS_VALID_BIT = 1; + + localparam CORE_NAME0 = 32'h_65_63_64_68; // "ecdh" + localparam CORE_NAME1 = 32'h_70_32_35_36; // "p256" + localparam CORE_VERSION = 32'h_30_2E_31_30; // "0.10" + + + // + // Registers + // + reg reg_control; + reg [31:0] reg_dummy; + + + // + // Wires + // + wire reg_status; + + + // + // ECDSA256 + // + ecdhp256 ecdhp256_inst + ( + .clk (clk), + .rst_n (reset_n), + + .next (reg_control), + .valid (reg_status), + + .bus_cs (cs && (addr_msb == ADDR_MSB_CORE)), + .bus_we (we), + .bus_addr (addr_lsb), + .bus_data_wr (write_data), + .bus_data_rd (read_data_core) + ); + + + // + // Read Latch + // + reg [31: 0] tmp_read_data; + + + // + // Read/Write Interface + // + always @(posedge clk) + // + if (!reset_n) begin + // + reg_control <= 1'b0; + // + end else if (cs && (addr_msb == ADDR_MSB_REGS)) begin + // + if (we) begin + // + // Write Handler + // + case (addr_lsb) + // + ADDR_CONTROL: reg_control <= write_data[CONTROL_NEXT_BIT]; + ADDR_DUMMY: reg_dummy <= write_data; + // + endcase + // + end else begin + // + // Read Handler + // + case (address) + // + ADDR_NAME0: tmp_read_data <= CORE_NAME0; + ADDR_NAME1: tmp_read_data <= CORE_NAME1; + ADDR_VERSION: tmp_read_data <= CORE_VERSION; + ADDR_CONTROL: tmp_read_data <= {{30{1'b0}}, reg_control, 1'b0}; + ADDR_STATUS: tmp_read_data <= {{30{1'b0}}, reg_status, 1'b1}; + ADDR_DUMMY: tmp_read_data <= reg_dummy; + // + default: tmp_read_data <= 32'h00000000; + // + endcase + // + end + // + end + + + // + // Register / Core Memory Selector + // + reg addr_msb_last; + always @(posedge clk) addr_msb_last <= addr_msb; + + assign read_data = (addr_msb_last == ADDR_MSB_REGS) ? tmp_read_data : read_data_core; + + +endmodule |