BRAM.bsv
上传用户:aoptech
上传日期:2014-09-22
资源大小:784k
文件大小:2k
- //----------------------------------------------------------------------//
- // The MIT License
- //
- // Copyright (c) 2007 Alfred Man Cheuk Ng, mcn02@mit.edu
- //
- // Permission is hereby granted, free of charge, to any person
- // obtaining a copy of this software and associated documentation
- // files (the "Software"), to deal in the Software without
- // restriction, including without limitation the rights to use,
- // copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the
- // Software is furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- // OTHER DEALINGS IN THE SOFTWARE.
- //----------------------------------------------------------------------//
- import RegFile::*;
- // FPGA BRAM interface
- interface BRAM#(type index_t, type data_t);
- method Action readRequest(index_t index);
- method Action writeRequest(index_t index, data_t data);
- method data_t readResponse();
- endinterface
- // make BRAM with regfile (for simulation)
- module mkRegFileBRAM#(index_t lo_index, index_t hi_index)
- (BRAM#(index_t,data_t))
- provisos (Bits#(index_t,size_index),
- Bits#(data_t,data_sz));
-
- // state elements
- RegFile#(index_t,data_t) mem <- mkRegFile(lo_index,hi_index);
- Reg#(index_t) readIdx <- mkRegU;
-
- // methods
- method Action readRequest(index_t index);
- readIdx <= index;
- endmethod
-
- method Action writeRequest(index_t index, data_t data);
- mem.upd(index,data);
- endmethod
-
- method data_t readResponse();
- return mem.sub(readIdx);
- endmethod
- endmodule
-