git.zerfleddert.de Git - raggedstone/blob - ethernet/userland/register.c

   1 #include <stdio.h>
   2 #include <sys/io.h>
   3 #include <errno.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6
   7 #define BASE 0xe800
   8
   9 #define die(x) \
  10 { \
  11         char buf[BUFSIZ]; \
  12                 snprintf(buf, sizeof(buf), \
  13                                 "%s: %d: %s: %s", \
  14                                 __FILE__, (int) __LINE__, __FUNCTION__,  x); \
  15                 perror(buf); \
  16                 exit(EXIT_FAILURE); \
  17 }
  18
  19 int
  20 main(void)
  21 {
  22         int ret;
  23         unsigned int word;
  24
  25         ret = ioperm(BASE,8,1);
  26         if (ret < 0) {
  27                 die("ioperm");
  28         }
  29         word = inl(BASE);
  30         printf("0x%08x\n", 0x0 | word);
  31
  32 #if 0
  33         outl(0x00, BASE);
  34         outl(0xFFFFFFFF, BASE);
  35
  36         word = inl(BASE);
  37         printf("0x%08x\n", 0x0 | word);
  38 #endif
  39
  40         ret = ioperm(BASE,8,0);
  41         if (ret < 0) {
  42                 die("ioperm");
  43         }
  44
  45         return(EXIT_SUCCESS);
  46 }