src/mem/port_proxy.cc

   1 /*
   2  * Copyright (c) 2012, 2018 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include "mem/port_proxy.hh"
  39
  40 #include "base/chunk_generator.hh"
  41
  42 void
  43 PortProxy::readBlobPhys(Addr addr, Request::Flags flags,
  44                         void *p, int size) const
  45 {
  46     for (ChunkGenerator gen(addr, size, _cacheLineSize); !gen.done();
  47          gen.next()) {
  48
  49         auto req = std::make_shared<Request>(
  50             gen.addr(), gen.size(), flags, Request::funcRequestorId);
  51
  52         Packet pkt(req, MemCmd::ReadReq);
  53         pkt.dataStatic(static_cast<uint8_t *>(p));
  54         sendFunctional(&pkt);
  55         p = static_cast<uint8_t *>(p) + gen.size();
  56     }
  57 }
  58
  59 void
  60 PortProxy::writeBlobPhys(Addr addr, Request::Flags flags,
  61                          const void *p, int size) const
  62 {
  63     for (ChunkGenerator gen(addr, size, _cacheLineSize); !gen.done();
  64          gen.next()) {
  65
  66         auto req = std::make_shared<Request>(
  67             gen.addr(), gen.size(), flags, Request::funcRequestorId);
  68
  69         Packet pkt(req, MemCmd::WriteReq);
  70         pkt.dataStaticConst(static_cast<const uint8_t *>(p));
  71         sendFunctional(&pkt);
  72         p = static_cast<const uint8_t *>(p) + gen.size();
  73     }
  74 }
  75
  76 void
  77 PortProxy::memsetBlobPhys(Addr addr, Request::Flags flags,
  78                           uint8_t v, int size) const
  79 {
  80     // quick and dirty...
  81     uint8_t *buf = new uint8_t[size];
  82
  83     std::memset(buf, v, size);
  84     PortProxy::writeBlobPhys(addr, flags, buf, size);
  85
  86     delete [] buf;
  87 }
  88
  89 bool
  90 PortProxy::tryWriteString(Addr addr, const char *str) const
  91 {
  92     do {
  93         if (!tryWriteBlob(addr++, str, 1))
  94             return false;
  95     } while (*str++);
  96     return true;
  97 }
  98
  99 bool
 100 PortProxy::tryReadString(std::string &str, Addr addr) const
 101 {
 102     while (true) {
 103         uint8_t c;
 104         if (!tryReadBlob(addr++, &c, 1))
 105             return false;
 106         if (!c)
 107             return true;
 108         str += c;
 109     }
 110 }
 111
 112 bool
 113 PortProxy::tryReadString(char *str, Addr addr, size_t maxlen) const
 114 {
 115     assert(maxlen);
 116     while (maxlen--) {
 117         if (!tryReadBlob(addr++, str, 1))
 118             return false;
 119         if (!*str++)
 120             return true;
 121     }
 122     // We ran out of room, so back up and add a terminator.
 123     *--str = '\0';
 124     return true;
 125 }