Deaers,
I'm using stm32mp151fad and would like to transfter sram data to ddr in M4 side. I refer to the logic analyzer example https://github.com/STMicroelectronics/logicanalyser. The sram data could be copied into ddr immediately.
// mask and transfer first SRAM buff
uint32_t * pSource = (uint32_t *)&mSampBuff[0];
uint32_t * pDest = (uint32_t *)(mArrayDdrBuff[mArrayDdrBuffIndex].physAddr+mRollingCompSampCount);
// we have a buffer of mSramPacketSize/2 bytes, to send by packet of 4 => loop on mSramPacketSize/8
for (int i=0; i<mSramPacketSize/8; i++) {
*(pDest+i) = *(pSource+i) & 0x7F7F7F7F; // 76µs to perform this operation, a memcpy takes 104µs
}
But when I tried it, the program will go to crash. The destination address is 0xf7841000.
Here is my etzpc configuration in tf-a. and I use spmin instead of optee.
DECPROT(STM32MP1_ETZPC_DDRCTRL_ID, DECPROT_NS_R_S_W, DECPROT_LOCK)
DECPROT(STM32MP1_ETZPC_DDRPHYC_ID, DECPROT_NS_R_S_W, DECPROT_LOCK)
Do you have any thoughts about its root cause?
