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rng.cc
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1/*
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3 * of Sciences
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38
39#include "dev/virtio/rng.hh"
40
41#include "debug/VIORng.hh"
42#include "params/VirtIORng.hh"
43#include "sim/system.hh"
44
45namespace gem5
46{
47
49 : VirtIODeviceBase(params, ID_RNG, 0, 0),
50 qReq(params.system->physProxy, byteOrder, params.qSize, *this)
51{
53}
54
58
59VirtIORng::RngQueue::RngQueue(PortProxy &proxy, ByteOrder bo, uint16_t size,
60 VirtIORng &_parent)
61 : VirtQueue(proxy, bo, size), parent(_parent)
62{
63}
64
65void
67{
68 // There are no configuration for RNG device
69 pkt->makeResponse();
70}
71
72void
74{
75 DPRINTF(VIORng, "try send\n");
76
78 while ((d = consumeDescriptor())) {
79 DPRINTF(VIORng, "Got descriptor (len: %i)\n", d->size());
80 size_t len = 0;
81 while (len < d->size()) {
82 uint8_t byte = rng->random<uint8_t>();
83 d->chainWrite(len, &byte, sizeof(uint8_t));
84 ++len;
85 }
86
87 // Tell the guest that we are done with this descriptor.
88 produceDescriptor(d, len);
89 parent.kick();
90 }
91}
92
93} // namespace gem5
#define DPRINTF(x,...)
Definition trace.hh:209
A Packet is used to encapsulate a transfer between two objects in the memory system (e....
Definition packet.hh:295
void makeResponse()
Take a request packet and modify it in place to be suitable for returning as a response to that reque...
Definition packet.hh:1062
This object is a proxy for a port or other object which implements the functional response protocol,...
Definition port_proxy.hh:87
VirtIO descriptor (chain) wrapper.
Definition base.hh:118
Base class for all VirtIO-based devices.
Definition base.hh:588
void registerQueue(VirtQueue &queue)
Register a new VirtQueue with the device model.
Definition base.cc:491
RngQueue(PortProxy &proxy, ByteOrder bo, uint16_t size, VirtIORng &_parent)
Definition rng.cc:59
void trySend()
Try to send data pending data from the terminal.
Definition rng.cc:73
VirtIO Rng.
Definition rng.hh:58
virtual ~VirtIORng()
Definition rng.cc:55
VirtIORngParams Params
Definition rng.hh:60
RngQueue qReq
Receive queue for port 0.
Definition rng.hh:94
VirtIORng(const Params &params)
Definition rng.cc:48
void readConfig(PacketPtr pkt, Addr cfgOffset)
Read from the configuration space of a device.
Definition rng.cc:66
Base wrapper around a virtqueue.
Definition base.hh:303
ByteOrder byteOrder(const ThreadContext *tc)
Definition utility.hh:359
Bitfield< 18, 16 > len
Bitfield< 9 > d
Definition misc_types.hh:64
Bitfield< 25, 21 > bo
Definition types.hh:82
Bitfield< 15 > system
Definition misc.hh:1032
Copyright (c) 2024 Arm Limited All rights reserved.
Definition binary32.hh:36
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition types.hh:147

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