#include <stdio.h>

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

int main(int argc, void** argv) {

void* base; int fd, reg;

fd = open("/dev/mem", O_RDWR | O_SYNC);

if (fd < 0) { printf("ERR: device open failed.\n"); return -1; } base = mmap(NULL, 0x1000, PROT_READ, MAP_SHARED, fd, 0x20E0000); if (base == 0) { printf("ERR: mmap failed.\n"); close(fd); return -1; }

if (argc > 1) {

reg = strtol(argv[1], NULL, 16); printf(">>> %08X is %08X\n", 0x20E0000 + reg, *((unsigned int*)(base + reg))); } munmap(base, 0x1000); close(fd); return 0;}