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Diffstat (limited to 'core_selector/src/rtl/global_selector.v')
| -rw-r--r-- | core_selector/src/rtl/global_selector.v | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/core_selector/src/rtl/global_selector.v b/core_selector/src/rtl/global_selector.v new file mode 100644 index 0000000..993f237 --- /dev/null +++ b/core_selector/src/rtl/global_selector.v @@ -0,0 +1,196 @@ +//====================================================================== +// +// global_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. +// +// +// Authors: Joachim Strombergson, Paul Selkirk, 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 global_selector + ( + input wire sys_clk, + input wire sys_rst, + input wire sys_ena, + + input wire [13: 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 + ); + + + //---------------------------------------------------------------- + // Address Decoder + //---------------------------------------------------------------- + wire [ 5: 0] addr_core_num = sys_eim_addr[13: 8]; // upper 6 bits specify core being addressed + wire [ 7: 0] addr_core_reg = sys_eim_addr[ 7: 0]; // lower 8 bits specify register offset in core + + + //---------------------------------------------------------------- + // Core Address Table + //---------------------------------------------------------------- + localparam CORE_ADDR_BOARD_REGS = 6'd0; + localparam CORE_ADDR_COMM_REGS = 6'd1; + + + //---------------------------------------------------------------- + // Board-Level Registers + //---------------------------------------------------------------- + wire [31: 0] read_data_board; + wire enable_board = sys_ena && (addr_core_num == CORE_ADDR_BOARD_REGS); + board_regs board_regs + ( + .clk(sys_clk), + .rst(sys_rst), + + .cs(enable_board & (sys_eim_rd | sys_eim_wr)), + .we(sys_eim_wr), + + .address(addr_core_reg), + .write_data(sys_write_data), + .read_data(read_data_board) + ); + + + //---------------------------------------------------------------- + // Communication-Channel Registers + //---------------------------------------------------------------- + wire [31: 0] read_data_comm; + wire enable_comm = sys_ena && (addr_core_num == CORE_ADDR_COMM_REGS); + comm_regs comm_regs + ( + .clk(sys_clk), + .rst(sys_rst), + + .cs(enable_comm & (sys_eim_rd | sys_eim_wr)), + .we(sys_eim_wr), + + .address(addr_core_reg), + .write_data(sys_write_data), + .read_data(read_data_comm) + ); + + + //---------------------------------------------------------------- + // SHA-1 + //---------------------------------------------------------------- + `ifdef USE_CORE_SHA1 + wire [31: 0] read_data_sha1; + wire enable_sha1 = sys_ena && (addr_core_num == CORE_ADDR_SHA1); + sha1 sha1_inst + ( + .clk(sys_clk), + .reset_n(~sys_rst), + + .cs(enable_sha1 & (sys_eim_rd | sys_eim_wr)), + .we(sys_eim_wr), + + .address(addr_core_reg), + .write_data(sys_write_data), + .read_data(read_data_sha1) + ); + `endif + + + //---------------------------------------------------------------- + // SHA-256 + //---------------------------------------------------------------- + `ifdef USE_CORE_SHA256 + wire [31: 0] read_data_sha256; + wire enable_sha256 = sys_ena && (addr_core_num == CORE_ADDR_SHA256); + sha256 sha256_inst + ( + .clk(sys_clk), + .reset_n(~sys_rst), + + .cs(enable_sha256 & (sys_eim_rd | sys_eim_wr)), + .we(sys_eim_wr), + + .address(addr_core_reg), + .write_data(sys_write_data), + .read_data(read_data_sha256) + ); + `endif + + + //---------------------------------------------------------------- + // SHA-512 + //---------------------------------------------------------------- + `ifdef USE_CORE_SHA512 + wire [31: 0] read_data_sha512; + wire enable_sha512 = sys_ena && (addr_core_num == CORE_ADDR_SHA512); + sha512 sha512_inst + ( + .clk(sys_clk), + .reset_n(~sys_rst), + + .cs(enable_sha512 & (sys_eim_rd | sys_eim_wr)), + .we(sys_eim_wr), + + .address(addr_core_reg), + .write_data(sys_write_data), + .read_data(read_data_sha512) + ); + `endif + + + //---------------------------------------------------------------- + // Output (Read Data) Multiplexor + //---------------------------------------------------------------- + reg [31: 0] sys_read_data_mux; + assign sys_read_data = sys_read_data_mux; + + always @* + // + case (addr_core_num) + // + CORE_ADDR_BOARD_REGS: + sys_read_data_mux = read_data_board; + CORE_ADDR_COMM_REGS: + sys_read_data_mux = read_data_comm; + // + default: + sys_read_data_mux = {32{1'b0}}; + // + endcase + + +endmodule + +//====================================================================== +// EOF global_selector.v +//====================================================================== |