src/lib/MemoryMap.bsv

   1 /*
   2 Copyright (c) 2013, IIT Madras
   3 All rights reserved.
   4
   5 Redistribution and use in source and binary forms, with or without
   6 modification, are permitted provided that the following conditions
   7 are met:
   8
   9 *  Redistributions of source code must retain the above copyright notice,
  10    this list of conditions and the following disclaimer.
  11 *  Redistributions in binary form must reproduce the above copyright
  12    notice, this list of conditions and the following disclaimer in the
  13    documentation and/or other materials provided with the distribution.
  14 *  Neither the name of IIT Madras  nor the names of its contributors
  15    may be used to endorse or promote products derived from this software
  16    without specific prior written permission.
  17
  18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  24 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 ---------------------------------------------------------------------
  30 */
  31 package MemoryMap;
  32         /*=== Project imports ==== */
  33         import defined_types::*;
  34         import fast_memory_map::*;
  35         import slow_memory_map::*;
  36         `include "instance_defines.bsv"
  37         `include "core_parameters.bsv"
  38         /*========================= */
  39
  40
  41 function Tuple2 #(Bool, Bit#(TLog#(Num_Fast_Slaves)))
  42                     fn_addr_to_slave_num  (Bit#(`PADDR) addr);
  43
  44     let ft = fn_addr_to_fastslave_num(addr);
  45     Bool isfast = tpl_1(ft);
  46     Bit#(TLog#(Num_Fast_Slaves)) x = tpl_2(ft);
  47
  48     let st = fn_slow_address_mapping(addr);
  49     Bool isslow = tpl_1(st);
  50     Bit#(TLog#(Num_Slow_Slaves)) y = tpl_2(st);
  51     if (isfast)
  52         return tuple2(isfast, x);
  53     else if (isslow)
  54         return tuple2(True,fromInteger(valueOf(SlowPeripheral_slave_num)));
  55     else
  56         return tuple2(False,?);
  57
  58 endfunction
  59
  60 function Bool is_IO_Addr(Bit#(`PADDR) addr); // TODO Shuold be PADDR
  61         if(addr>=`DebugBase && addr<=`DebugEnd)
  62             return (True);
  63         `ifdef SDR0_0_Base
  64             else if(addr>=`SDR0_0_Base && addr<=`SDR0_0_End)
  65             `ifdef FlexBus
  66                 return (True);
  67             `else
  68                 return (False);
  69             `endif
  70         `endif
  71         `ifdef BOOTROM
  72             else if(addr>=`BootRomBase && addr<=`BootRomEnd)
  73                 return (False);
  74         `endif
  75         `ifdef TCMemory
  76             else if(addr>=`TCMBase && addr<=`TCMEnd)
  77                 return (False);
  78         `endif
  79         else
  80             return True;
  81 endfunction
  82
  83 endpackage