Run the simulator in GDB and see what happens.
Ali
On May 25, 2011, at 9:23 PM, Digant wrote:
> 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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> [email protected]
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