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Diffstat (limited to 'core_selector/src/rtl/math_selector.v')
| -rw-r--r-- | core_selector/src/rtl/math_selector.v | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/core_selector/src/rtl/math_selector.v b/core_selector/src/rtl/math_selector.v deleted file mode 100644 index 8b8473a..0000000 --- a/core_selector/src/rtl/math_selector.v +++ /dev/null @@ -1,129 +0,0 @@ -//====================================================================== -// -// math_selector.v -// --------------- -// Selector of math cores. Currently there is only one core in math - -// the modexp core. That core uses 12 bits and we simply ignore the -// top two bits of the address. If we add more math cores we will -// use these bits to select cores here. -// -// -// -// 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 math_selector - ( - input wire sys_clk, - input wire sys_rst_n, - 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 - ); - - - //---------------------------------------------------------------- - // List of Available Cores - //---------------------------------------------------------------- - // Comment following lines to exclude cores from implementation. - `define USE_CORE_MODEXPS6 - - - //---------------------------------------------------------------- - // Address Decoder - //---------------------------------------------------------------- -`ifdef USE_CORE_MODEXPS6 - // upper 4 bits specify core being addressed - wire [ 3: 0] addr_core_num = sys_eim_addr[13:10]; - // lower 10 bits specify register offset in core - wire [ 9: 0] addr_core_reg = sys_eim_addr[ 9: 0]; -`endif - - - //---------------------------------------------------------------- - // Core Address Table - //---------------------------------------------------------------- - `ifdef USE_CORE_MODEXPS6 - localparam CORE_ADDR_MODEXPS6 = 4'd0; - `endif - - - //---------------------------------------------------------------- - // ModExpS6 - //---------------------------------------------------------------- - `ifdef USE_CORE_MODEXPS6 - wire [31: 0] read_data_modexps6; - wire enable_modexps6 = sys_ena && (addr_core_num == CORE_ADDR_MODEXPS6); - modexps6_wrapper modexps6_inst - ( - .clk(sys_clk), - .reset_n(sys_rst_n), - - .cs(enable_modexps6 & (sys_eim_rd | sys_eim_wr)), - .we(sys_eim_wr), - - .address(addr_core_reg), - .write_data(sys_write_data), - .read_data(read_data_modexps6) - ); - `endif - - - //---------------------------------------------------------------- - // Output (Read Data) Multiplexor - //---------------------------------------------------------------- - reg [31: 0] sys_read_data_mux; - assign sys_read_data = sys_read_data_mux; - - always @* - // - `ifdef USE_CORE_MODEXPS6 - if (addr_core_num == CORE_ADDR_MODEXPS6) - begin - sys_read_data_mux = read_data_modexps6; - end - else - `endif - // - begin - sys_read_data_mux = {32{1'b0}}; - end - - -endmodule - -//====================================================================== -// EOF math_selector.v -//====================================================================== |