diff options
author | Ali Saidi <saidi@eecs.umich.edu> | 2006-01-31 14:20:39 -0500 |
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committer | Ali Saidi <saidi@eecs.umich.edu> | 2006-01-31 14:20:39 -0500 |
commit | 4875b3346709d72e0be99fb6ccede65550b91f94 (patch) | |
tree | bd71ec62c7a5a74e40ca226a2ac5b4f26c71f81d /dev/io_device.cc | |
parent | a1033448ead67ea2819d67609c0390aefc865b0f (diff) | |
download | gem5-4875b3346709d72e0be99fb6ccede65550b91f94.tar.xz |
changed sendresult -> bool,tick,void as appropriate
first crack at io devices code
made CpuRequest that derives from Request
dev/io_device.cc:
dev/io_device.hh:
first crack at the classes for Pio and Dma devices
dev/platform.hh:
We are going to a system pointer to get info about the memory system
mem/bus.hh:
changed sendresult -> bool,tick,void as appropriate
mem/port.hh:
changed sendresult -> bool,tick,void as appropriate;
removed the sendTiming(pkt,t) call since it is not really
implementable in a generic fashion
mem/request.hh:
pulled items from Request into CpuRequest
--HG--
extra : convert_revision : 6213cf2b66417fa023b80884d9e623e78f5aa891
Diffstat (limited to 'dev/io_device.cc')
-rw-r--r-- | dev/io_device.cc | 110 |
1 files changed, 101 insertions, 9 deletions
diff --git a/dev/io_device.cc b/dev/io_device.cc index 6ab876ab8..1ed2a060a 100644 --- a/dev/io_device.cc +++ b/dev/io_device.cc @@ -27,25 +27,118 @@ */ #include "dev/io_device.hh" -#include "mem/bus/base_interface.hh" -#include "mem/bus/dma_interface.hh" #include "sim/builder.hh" +void +PioPort::SendEvent::process() +{ + if (port->sendTiming(packet) == Success) + return; + + port->transmitList.push_back(&packet); +} + PioDevice::PioDevice(const std::string &name, Platform *p) - : FunctionalMemory(name), platform(p), pioInterface(NULL), pioLatency(0) -{} + : SimObject(name), platform(p) +{ + pioPort = new PioPort(this); +} + + +bool +PioDevice::recvTiming(Packet &pkt) +{ + device->recvAtomic(pkt); + sendTiming(pkt, pkt.responseTime-pkt.requestTime); + return Success; +} PioDevice::~PioDevice() { - if (pioInterface) + if (pioPort) delete pioInterface; } -DEFINE_SIM_OBJECT_CLASS_NAME("PioDevice", PioDevice) +void +DmaPort::sendDma(Packet &pkt) +{ + device->platform->system->memoryMode() + { + case MemAtomic: + } +} DmaDevice::DmaDevice(const std::string &name, Platform *p) - : PioDevice(name, p), dmaInterface(NULL) -{} + : PioDevice(name, p) +{ + dmaPort = new dmaPort(this); +} + +void +DmaPort::dmaAction(Memory::Command cmd, DmaPort port, Addr addr, int size, + Event *event, uint8_t *data = NULL) +{ + + assert(event); + + int prevSize = 0; + Packet basePkt; + Request baseReq; + + basePkt.flags = 0; + basePkt.coherence = NULL; + basePkt.senderState = NULL; + basePkt.src = 0; + basePkt.dest = 0; + basePkt.cmd = cmd; + basePkt.result = Unknown; + basePkt.request = NULL; + baseReq.nicReq = true; + baseReq.time = curTick; + + completionEvent = event; + + for (ChunkGenerator gen(addr, size, sendBlockSizeQuery()); !gen.done(); gen.next()) { + Packet *pkt = new Packet(basePkt); + Request *req = new Request(baseReq); + pkt->addr = gen.addr(); + pkt->size = gen.size(); + pkt->req = req; + pkt->req->paddr = pkt->addr; + pkt->req->size = pkt->size; + // Increment the data pointer on a write + pkt->data = data ? data + prevSize : NULL ; + prevSize = pkt->size; + + sendDma(*pkt); + } +} + + +void +DmaPort::sendDma(Packet &pkt) +{ + // some kind of selction between access methods + // more work is going to have to be done to make + // switching actually work + MemState state = device->platform->system->memState; + + if (state == Timing) { + if (sendTiming(pkt) == Failure) + transmitList.push_back(&packet); + } else if (state == Atomic) { + sendAtomic(pkt); + completionEvent->schedule(pkt.responseTime - pkt.requestTime); + completionEvent == NULL; + } else if (state == Functional) { + sendFunctional(pkt); + // Is this correct??? + completionEvent->schedule(pkt.responseTime - pkt.requestTime); + completionEvent == NULL; + } else + panic("Unknown memory command state."); + +} DmaDevice::~DmaDevice() { @@ -53,5 +146,4 @@ DmaDevice::~DmaDevice() delete dmaInterface; } -DEFINE_SIM_OBJECT_CLASS_NAME("DmaDevice", DmaDevice) |