pktfifo.cc revision 10905
1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 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 are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31#include "base/misc.hh" 32#include "dev/pktfifo.hh" 33 34using namespace std; 35 36bool 37PacketFifo::copyout(void *dest, unsigned offset, unsigned len) 38{ 39 char *data = (char *)dest; 40 if (offset + len >= size()) 41 return false; 42 43 iterator i = fifo.begin(); 44 iterator end = fifo.end(); 45 while (len > 0) { 46 EthPacketPtr &pkt = i->packet; 47 while (offset >= pkt->length) { 48 offset -= pkt->length; 49 ++i; 50 } 51 52 if (i == end) 53 panic("invalid fifo"); 54 55 unsigned size = min(pkt->length - offset, len); 56 memcpy(data, pkt->data, size); 57 offset = 0; 58 len -= size; 59 data += size; 60 ++i; 61 } 62 63 return true; 64} 65 66 67void 68PacketFifoEntry::serialize(const string &base, CheckpointOut &cp) const 69{ 70 packet->serialize(base + ".packet", cp); 71 paramOut(cp, base + ".slack", slack); 72 paramOut(cp, base + ".number", number); 73 paramOut(cp, base + ".priv", priv); 74} 75 76void 77PacketFifoEntry::unserialize(const string &base, CheckpointIn &cp) 78{ 79 packet = make_shared<EthPacketData>(16384); 80 packet->unserialize(base + ".packet", cp); 81 paramIn(cp, base + ".slack", slack); 82 paramIn(cp, base + ".number", number); 83 paramIn(cp, base + ".priv", priv); 84} 85 86void 87PacketFifo::serialize(const string &base, CheckpointOut &cp) const 88{ 89 paramOut(cp, base + ".size", _size); 90 paramOut(cp, base + ".maxsize", _maxsize); 91 paramOut(cp, base + ".reserved", _reserved); 92 paramOut(cp, base + ".packets", fifo.size()); 93 94 int i = 0; 95 for (const auto &entry : fifo) 96 entry.serialize(csprintf("%s.entry%d", base, i++), cp); 97} 98 99void 100PacketFifo::unserialize(const string &base, CheckpointIn &cp) 101{ 102 paramIn(cp, base + ".size", _size); 103// paramIn(cp, base + ".maxsize", _maxsize); 104 paramIn(cp, base + ".reserved", _reserved); 105 int fifosize; 106 paramIn(cp, base + ".packets", fifosize); 107 108 fifo.clear(); 109 110 for (int i = 0; i < fifosize; ++i) { 111 PacketFifoEntry entry; 112 entry.unserialize(csprintf("%s.entry%d", base, i), cp); 113 fifo.push_back(entry); 114 } 115} 116