ecc_check.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>


#define MEM_START   0xFED10000
#define FILESIZE    32*1024

int main(int argc, char *argv[])
{
    int i;
    int fd = -1;
    unsigned long pagesize;
    unsigned char *map;
    unsigned char *mem;

    fd = open("/dev/mem", O_RDONLY|O_SYNC);
    if (fd == -1) {
        perror("Error opening /dev/mem for reading");
        exit(EXIT_FAILURE);
    }

    map = mmap(0, FILESIZE, PROT_READ, MAP_SHARED, fd, MEM_START);
    if (map == MAP_FAILED) {
        close(fd);
        perror("Error mmapping the file");
        exit(EXIT_FAILURE);
    }

    // Get RAM info
    printf("5004-5007h: ");
    for (i = 0x5004; i < 0x5004+4; i++) {
        printf("%lx ", map[i]);
    }
    printf("\n");

    printf("5008-500Bh: ");
    for (i = 0x5008; i < 0x5008+4; i++) {
        printf("%lx ", map[i]);
    }
    printf("\n");

    // Unmap the file
    if (munmap(map, FILESIZE) == -1) {
        perror("Error un-mmapping the file");
    }

    close(fd);
    return 0;
}