gem5  v22.1.0.0
rng.cc
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38 
39 #include "dev/virtio/rng.hh"
40 
41 #include "base/random.hh"
42 #include "debug/VIORng.hh"
43 #include "params/VirtIORng.hh"
44 #include "sim/system.hh"
45 
46 namespace gem5
47 {
48 
49 VirtIORng::VirtIORng(const Params &params)
50  : VirtIODeviceBase(params, ID_RNG, 0, 0),
51  qReq(params.system->physProxy, byteOrder, params.qSize, *this)
52 {
53  registerQueue(qReq);
54 }
55 
56 VirtIORng::~VirtIORng()
57 {
58 }
59 
60 VirtIORng::RngQueue::RngQueue(PortProxy &proxy, ByteOrder bo, uint16_t size,
61  VirtIORng &_parent)
62  : VirtQueue(proxy, bo, size), parent(_parent)
63 {
64 }
65 
66 void
67 VirtIORng::readConfig(PacketPtr pkt, Addr cfgOffset)
68 {
69  // There are no configuration for RNG device
70  pkt->makeResponse();
71 }
72 
73 void
74 VirtIORng::RngQueue::trySend()
75 {
76  DPRINTF(VIORng, "try send\n");
77 
78  VirtDescriptor *d;
79  while ((d = consumeDescriptor())) {
80  DPRINTF(VIORng, "Got descriptor (len: %i)\n", d->size());
81  size_t len = 0;
82  while (len < d->size()) {
83  uint8_t byte = gem5::random_mt.random<uint8_t>();
84  d->chainWrite(len, &byte, sizeof(uint8_t));
85  ++len;
86  }
87 
88  // Tell the guest that we are done with this descriptor.
89  produceDescriptor(d, len);
90  parent.kick();
91  }
92 }
93 
94 } // namespace gem5
#define DPRINTF(x,...)
Definition: trace.hh:186
VirtIORng(const Params &params)
Definition: rng 2.cc:49
Random random_mt
Definition: random.cc:99
std::enable_if_t< std::is_integral_v< T >, T > random()
Use the SFINAE idiom to choose an implementation based on whether the type is integral or floating po...
Definition: random.hh:90
uint16_t len
Definition: helpers.cc:62
ByteOrder byteOrder(const ThreadContext *tc)
Definition: utility.hh:357
Bitfield< 9 > d
Definition: misc_types.hh:64
Bitfield< 25, 21 > bo
Definition: types.hh:82
Bitfield< 15 > system
Definition: misc.hh:1004
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Packet * PacketPtr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147

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