Test application: mini-peeker.c

Below is the source code for a test application called mini-peeker.c that maps in the minidriver data area and prints the contents:

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/neutrino.h>
#include <sys/syspage.h>
#include <hw/inout.h>
#include <inttypes.h>

struct mini_data
   uint16_t	nstartup;
   uint16_t	nstartupp;
   uint16_t	nstartupf;
   uint16_t	nkernel;
   uint16_t	nprocess;
   uint16_t	data_len;

int main(int argc, char *argv[]) 
   int 		i, count;
   int			dump_data = 0;
   uint8_t 	*dptr;
   struct mini_data	*mdata;
   if (argv[1])
       dump_data = 1;
   ThreadCtl(_NTO_TCTL_IO, 0);

   /* map in minidriver data area */
   if ((dptr = mmap_device_memory(0, 65535, PROT_READ | 
                                  PROT_WRITE | PROT_NOCACHE, 0, 
      	     SYSPAGE_ENTRY(mdriver)->data_paddr)) == NULL)
       	fprintf(stderr, "Unable to get data pointer\n");
       	return (-1);

   mdata = (struct mini_data *) dptr;
   dptr = dptr + sizeof(struct mini_data);

   /* dump mini-driver data */	
   printf("---------------- MDRIVER DATA -------------------\n");
   printf("\tMDRIVER_STARTUP         calls = %d\n", mdata->nstartup);
   printf("\tMDRIVER_STARTUP_PREPARE calls = %d\n", mdata->nstartupp);
   printf("\tMDRIVER_STARTUP_FINI    calls = %d\n", mdata->nstartupf);
   printf("\tMDRIVER_KERNEL          calls = %d\n", mdata->nkernel);
   printf("\tMDRIVER_PROCESS         calls = %d\n", mdata->nprocess);
   printf("\tData Length             calls = %d\n", mdata->data_len);
   count = mdata->data_len;

   if (dump_data)
       printf("State information:\n");
       for (i = 0; i < count; i++)
	    printf("%d\n", dptr[i]);

   return EXIT_SUCCESS;

Compile this code for your target system using regular compile technique. For example:

qcc -Vgcc_ntoppcbe mini-peeker.c -o mini-peeker