C++ (Cpp) e_sysreg_write Examples

Example #1

File: e_ic_irq_disable.c Project: jwjanneck/epiphany-libs

unsigned e_irq_disable(e_irq_type_t irq)
{
	unsigned previous;

	previous = e_sysreg_read(E_IMASK);
	e_sysreg_write(E_IMASK, previous | (1<<(irq-SIG_RESET)));

	return previous;
}

Example #2

File: e_ic_irq_lower.c Project: indexfactor/epiphany-libs

void e_irq_lower(e_irq_type_t irq)
{
	e_sysreg_write(E_ILATCL, (unsigned)(1<<(irq-SIG_RESET)));
}

Example #3

File: e_main.c Project: AlbertoGP/epiphany-examples

int main(int argc, char *argv[]){
  int      k, i, j;
  unsigned row = 0;
  unsigned col = 0;

  unsigned int offset = 0x4000;
  
  int fail    = 0;
  int verbose = 1;

  unsigned  buffers[LINKS];

  //Addresses outside the chip to write
  //assuming that chip sits at 0x82400000
  buffers[0] = 0x42400000; //north
  buffers[1] = 0x92400000; //south
  buffers[2] = 0x83400000; //east

  const char *test_name = "loopback";

  unsigned int result;

  unsigned PAT0 = 0x55555555;
  unsigned PAT1 = 0xAAAAAAAA;

  volatile unsigned *addr;
  volatile unsigned *local_addr;

  e_test_init(&row, &col);

  //North-Link
  addr=(unsigned *) (0x82400000 + 0x002F0328); //on-chip IO register address
  e_sysreg_write(E_CONFIG, (unsigned) 0x1000); //"direct north routing mode"
  (*(addr)) = 0x00004000;                      //write to north IO transmit reg
  e_sysreg_write(E_CONFIG, (unsigned) 0x0000); //clear out direct routing mode

  //South-Link
  addr = (unsigned *) (0x82400000 + 0x0C2F0328);
  e_sysreg_write(E_CONFIG, (unsigned) 0x1000);
  (*(addr)) = 0x00004000;
  e_sysreg_write(E_CONFIG, (unsigned) 0x0000);

  //East-Link
  addr = (unsigned *) (0x82400000 + 0x083F0328);
  e_sysreg_write(E_CONFIG, (unsigned) 0x5000);
  (*(addr)) = 0x00004000;
  e_sysreg_write(E_CONFIG, (unsigned) 0x0000);

  //West-Link (not used for test platform)
  //addr=(unsigned *) (0x82400000+0x080F0328;
  //e_sysreg_write(E_CONFIG, (unsigned) 0x5000);
  //(*(addr))                   =0x00004000;
  //e_sysreg_write(E_CONFIG, (unsigned) 0x0000);
  
  //Testing link loopback
  for(i=0; i<LINKS; i++){
    for(k=0; k<buffer_size; k=k+sizeof(int)){
      addr = (unsigned *) (buffers[i] + offset + k);   //writing to global address through link
      local_addr = (unsigned *) (offset+k);            //reading from local 0x000xxxxx memory
      (*(addr)) = PAT0;
      for(j=0; j<500; j++){
	__asm__ __volatile__ ("NOP;"); //wait loop to make sure data has returned
      }
      result = (*(local_addr));
      if(result != PAT0){
	fail = 1;
	if(verbose > 0){
	  printf("FAIL-PAT0: core=(%d,%d) addr=(%p) result=0x%x\n",row,col,addr,result); 
	}
      }
      /*PAT1*/
      (*(addr)) = PAT1;
      for(j=0; j<500; j++){
	__asm__ __volatile__ ("NOP;");
      }
      result = (*(local_addr));
      if(result != PAT1){
	fail = 1;
	if(verbose > 0){	    
	  printf("FAIL-PAT1: core=(%d,%d) addr=(%p) result=0x%x\n",row,col,addr,result); 
	}
      }
    }
  }
  //Finish Test
  return e_test_finish(test_name,fail,row,col);
}