TDA2: EDMA

Hi Rishabh,
Thanks for reply.
I want to clarify that whether EDMA uses the same pin which QSPI uses or different.
In my SBL source code
void QSPI_ReadSectors_edma(void *dstAddr, uint32_t srcOffsetAddr, uint32_t length, uint32_t edma_ch_num)
this is the function which is used for reading from external SDF. Inside this function following function is called

uint32_t EDMA3EnableTransfer(uint32_t baseAddr, uint32_t chNum,uint32_t trigMode)
{
uint32_t retVal = FALSE;
switch (trigMode)
{
case EDMA3_TRIG_MODE_MANUAL:
if (chNum < SOC_EDMA3_NUM_DMACH)
{
EDMA3SetEvt(baseAddr, chNum);
retVal = (uint32_t) TRUE;
}
break;

case EDMA3_TRIG_MODE_QDMA:
if (chNum < SOC_EDMA3_NUM_QDMACH)
{
EDMA3EnableQdmaEvt(baseAddr, chNum);
retVal = (uint32_t) TRUE;
}
break;

case EDMA3_TRIG_MODE_EVENT:
if (chNum < SOC_EDMA3_NUM_DMACH)
{
/*clear SECR & EMCR to clean any previous NULL request */
EDMA3ClrMissEvt(baseAddr, chNum);

/* Set EESR to enable event */
EDMA3EnableDmaEvt(baseAddr, chNum);
retVal = (uint32_t) TRUE;
}
break;

default:
retVal = (uint32_t) FALSE;
break;
}
return retVal;
}

If you have the edma.c then please explain me how this function works.

Also what is the meaning of shadow region?

Thanks!
Regards,
Sagar