Hi all,
I am developing a model for Pl081 Dma controller,
As in copyengine ,I am using nested classes for controller & channel.
>From channel's private function I try to use dmaPort->dmaAction(...) but
when ever I call it Gem5 gives segmentation fault.
here is the part of the code,
--------------------------
*from source:*
class channel{
*. *
*.*
*.*
*private: *
*void dmaRead();*
void dmaReadDone();
EventWrapper<pl081_channel, &pl081_channel::dmaReadDone>
dmaReadDoneEvent;
uint8_t *dmaBuffer;
dmaBuffer = new uint8_t[channel_regs.reg_DMAC_Chan_Control.transfersize
* 8];
int dmasize;
.
.
.
}
channel::dmaread(){
.
.
.
//single request for 8 bytes
startAddr = 0x0x7a00000; // frame buffer
dmasize=8;
dmaPort->dmaAction(MemCmd::ReadReq, startAddr,
dmasize, &dmaReadDoneEvent, dmaBuffer, 0,
Request::UNCACHEABLE);
}
*from config.ini*
[system.realview.dmac]
type=Pl081
amba_id=1314945
gic=system.realview.gic
int_num=56
max_backoff_delay=10000000
min_backoff_delay=4000
pio_addr=268632064
pio_latency=10000
pio_size=4095
platform=system.realview
system=system
dma=system.iobus.port[25]
pio=system.iobus.port[8]
--------------------------
I have checked PL111 as reference and tried to do exactly same with dmasize
=8 and same startaddress.
Even after that also it didn't work.
Can anybody tell me what can be wrong ??
I can send you the codes if anybody wants.
Thank you in advance.
Regards,
Digant Desai.
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