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| -rw-r--r-- | core_selector/src/rtl/math_selector.v | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/core_selector/src/rtl/math_selector.v b/core_selector/src/rtl/math_selector.v new file mode 100644 index 0000000..3c29554 --- /dev/null +++ b/core_selector/src/rtl/math_selector.v @@ -0,0 +1,78 @@ +//====================================================================== +// +// 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, + 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 + ); + + + // + // Output Register + // + reg [31: 0] tmp_read_data; + assign sys_read_data = tmp_read_data; + + + modexp modexp_inst( + .clk(sys_clk), + .reset_n(~sys_rst), + .cs(sys_ena), + .we(sys_eim_wr), + .address(sys_eim_addr[11 : 0]), + .write_data(sys_write_data), + .read_data(sys_read_data) + ); + +endmodule // math_selector + +//====================================================================== +// EOF math_selector.v +//====================================================================== |