gem5  v21.1.0.2
etherbus.cc
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28 
29 /* @file
30  * Device module for modelling an ethernet hub
31  */
32 #include "dev/net/etherbus.hh"
33 
34 #include <cmath>
35 #include <deque>
36 #include <string>
37 #include <vector>
38 
39 #include "base/logging.hh"
40 #include "base/trace.hh"
41 #include "debug/Ethernet.hh"
42 #include "debug/EthernetData.hh"
43 #include "dev/net/etherdump.hh"
44 #include "dev/net/etherint.hh"
45 #include "dev/net/etherpkt.hh"
46 #include "params/EtherBus.hh"
47 #include "sim/cur_tick.hh"
48 
49 namespace gem5
50 {
51 
53  : SimObject(p), ticksPerByte(p.speed), loopback(p.loopback),
54  event([this]{ txDone(); }, "ethernet bus completion"),
55  sender(0), dump(p.dump)
56 {
57 }
58 
59 void
61 {
62  devlist_t::iterator i = devlist.begin();
63  devlist_t::iterator end = devlist.end();
64 
65  DPRINTF(Ethernet, "ethernet packet received: length=%d\n", packet->length);
66  DDUMP(EthernetData, packet->data, packet->length);
67 
68  while (i != end) {
69  if (loopback || *i != sender)
70  (*i)->sendPacket(packet);
71  ++i;
72  }
73 
74  sender->sendDone();
75 
76  if (dump)
77  dump->dump(packet);
78 
79  sender = 0;
80  packet = 0;
81 }
82 
83 Port &
84 EtherBus::getPort(const std::string &if_name, PortID idx)
85 {
86  panic("Etherbus doesn't work\n");
87 }
88 
89 bool
91 {
92  if (busy()) {
93  DPRINTF(Ethernet, "ethernet packet not sent, bus busy\n", curTick());
94  return false;
95  }
96 
97  DPRINTF(Ethernet, "ethernet packet sent: length=%d\n", pkt->length);
98  DDUMP(EthernetData, pkt->data, pkt->length);
99 
100  packet = pkt;
101  sender = sndr;
102  int delay = (int)ceil(((double)pkt->simLength * ticksPerByte) + 1.0);
103  DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
104  delay, ticksPerByte);
105  schedule(event, curTick() + delay);
106 
107  return true;
108 }
109 
110 } // namespace gem5
gem5::curTick
Tick curTick()
The universal simulation clock.
Definition: cur_tick.hh:46
gem5::PortID
int16_t PortID
Port index/ID type, and a symbolic name for an invalid port id.
Definition: types.hh:252
gem5::EtherBus::getPort
Port & getPort(const std::string &if_name, PortID idx=InvalidPortID) override
Get a port with a given name and index.
Definition: etherbus.cc:84
gem5::EtherBus::txDone
void txDone()
Definition: etherbus.cc:60
gem5::EtherBus::ticksPerByte
double ticksPerByte
Definition: etherbus.hh:51
gem5::EtherBus::loopback
bool loopback
Definition: etherbus.hh:52
gem5::MipsISA::event
Bitfield< 10, 5 > event
Definition: pra_constants.hh:300
cur_tick.hh
etherint.hh
etherdump.hh
gem5::EventManager::schedule
void schedule(Event &event, Tick when)
Definition: eventq.hh:1019
gem5::EtherBus::packet
EthPacketPtr packet
Definition: etherbus.hh:56
gem5::EtherInt
Definition: etherint.hh:50
gem5::ArmISA::i
Bitfield< 7 > i
Definition: misc_types.hh:66
gem5::EtherBus::EtherBus
EtherBus(const Params &p)
Definition: etherbus.cc:52
gem5::EtherDump::dump
void dump(EthPacketPtr &pkt)
Definition: etherdump.hh:60
gem5::EtherBus::devlist
devlist_t devlist
Definition: etherbus.hh:50
gem5::EthPacketPtr
std::shared_ptr< EthPacketData > EthPacketPtr
Definition: etherpkt.hh:90
DPRINTF
#define DPRINTF(x,...)
Definition: trace.hh:186
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
gem5::statistics::dump
void dump()
Dump all statistics data to the registered outputs.
Definition: statistics.cc:295
gem5::EtherBus::event
EventFunctionWrapper event
Definition: etherbus.hh:55
gem5::SimObject
Abstract superclass for simulation objects.
Definition: sim_object.hh:146
DDUMP
#define DDUMP(x, data, count)
DPRINTF is a debugging trace facility that allows one to selectively enable tracing statements.
Definition: trace.hh:180
gem5::EtherBus::send
bool send(EtherInt *sender, EthPacketPtr &packet)
Definition: etherbus.cc:90
gem5::EtherInt::sendDone
virtual void sendDone()=0
gem5::Port
Ports are used to interface objects to each other.
Definition: port.hh:61
gem5::EtherBus::dump
EtherDump * dump
Definition: etherbus.hh:58
gem5::EtherBus::sender
EtherInt * sender
Definition: etherbus.hh:57
gem5::EtherBus::busy
bool busy() const
Definition: etherbus.hh:67
logging.hh
etherpkt.hh
trace.hh
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::EtherBus::Params
EtherBusParams Params
Definition: etherbus.hh:61
etherbus.hh
panic
#define panic(...)
This implements a cprintf based panic() function.
Definition: logging.hh:177

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