gem5  v21.1.0.2
dma_virt_device.cc
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33 
34 #include "dev/dma_virt_device.hh"
35 
36 namespace gem5
37 {
38 
40  : DmaDevice(p), pageBytes(p.system->getPageBytes())
41 {
42 }
43 
44 void
45 DmaVirtDevice::dmaReadVirt(Addr host_addr, unsigned size,
46  DmaCallback *cb, void *data, Tick delay)
47 {
48  dmaVirt(&DmaDevice::dmaRead, host_addr, size, cb, data, delay);
49 }
50 
51 void
52 DmaVirtDevice::dmaWriteVirt(Addr host_addr, unsigned size,
53  DmaCallback *cb, void *data, Tick delay)
54 {
55  dmaVirt(&DmaDevice::dmaWrite, host_addr, size, cb, data, delay);
56 }
57 
58 void
59 DmaVirtDevice::dmaVirt(DmaFnPtr dmaFn, Addr addr, unsigned size,
60  DmaCallback *cb, void *data, Tick delay)
61 {
62  if (size == 0) {
63  if (cb)
64  schedule(cb->getChunkEvent(), curTick() + delay);
65  return;
66  }
67 
68  // move the buffer data pointer with the chunks
69  uint8_t *loc_data = (uint8_t*)data;
70 
71  for (ChunkGenerator gen(addr, size, pageBytes); !gen.done(); gen.next()) {
72  Addr phys;
73 
74  // translate pages into their corresponding frames
75  translateOrDie(gen.addr(), phys);
76 
77  Event *event = cb ? cb->getChunkEvent() : nullptr;
78 
79  (this->*dmaFn)(phys, gen.size(), event, loc_data, delay);
80 
81  loc_data += gen.size();
82  }
83 }
84 
85 } // namespace gem5
gem5::curTick
Tick curTick()
The universal simulation clock.
Definition: cur_tick.hh:46
data
const char data[]
Definition: circlebuf.test.cc:48
gem5::DmaVirtDevice::dmaReadVirt
void dmaReadVirt(Addr host_addr, unsigned size, DmaCallback *cb, void *data, Tick delay=0)
Initiate a DMA read from virtual address host_addr.
Definition: dma_virt_device.cc:45
gem5::DmaVirtDevice::dmaVirt
void dmaVirt(DmaFnPtr dmaFn, Addr host_addr, unsigned size, DmaCallback *cb, void *data, Tick delay=0)
Initiate a call to DmaDevice using DmaFnPtr do a DMA starting from virtual address host_addr for size...
Definition: dma_virt_device.cc:59
gem5::MipsISA::event
Bitfield< 10, 5 > event
Definition: pra_constants.hh:300
gem5::DmaVirtDevice::translateOrDie
virtual void translateOrDie(Addr vaddr, Addr &paddr)=0
Function used to translate from virtual to physical addresses.
gem5::X86ISA::system
Bitfield< 15 > system
Definition: misc.hh:1003
gem5::DmaDevice::dmaRead
void dmaRead(Addr addr, int size, Event *event, uint8_t *data, uint32_t sid, uint32_t ssid, Tick delay=0)
Definition: dma_device.hh:228
gem5::EventManager::schedule
void schedule(Event &event, Tick when)
Definition: eventq.hh:1019
gem5::DmaVirtDevice::pageBytes
Addr pageBytes
Definition: dma_virt_device.hh:45
gem5::DmaCallback::getChunkEvent
Event * getChunkEvent()
Request a chunk event.
Definition: dma_device.hh:313
gem5::ChunkGenerator
This class takes an arbitrary memory region (address/length pair) and generates a series of appropria...
Definition: chunk_generator.hh:59
gem5::ChunkGenerator::done
bool done() const
Are we done? That is, did the last call to next() advance past the end of the region?
Definition: chunk_generator.hh:141
gem5::Event
Definition: eventq.hh:251
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
gem5::Tick
uint64_t Tick
Tick count type.
Definition: types.hh:58
gem5::DmaDevice
Definition: dma_device.hh:203
gem5::DmaDevice::Params
DmaDeviceParams Params
Definition: dma_device.hh:209
gem5::DmaDevice::dmaWrite
void dmaWrite(Addr addr, int size, Event *event, uint8_t *data, uint32_t sid, uint32_t ssid, Tick delay=0)
Definition: dma_device.hh:214
gem5::DmaVirtDevice::dmaWriteVirt
void dmaWriteVirt(Addr host_addr, unsigned size, DmaCallback *b, void *data, Tick delay=0)
Initiate a DMA write from virtual address host_addr.
Definition: dma_virt_device.cc:52
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
gem5::DmaVirtDevice::DmaVirtDevice
DmaVirtDevice(const Params &p)
Definition: dma_virt_device.cc:39
gem5::DmaCallback
DMA callback class.
Definition: dma_device.hh:260
dma_virt_device.hh
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::X86ISA::addr
Bitfield< 3 > addr
Definition: types.hh:84

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