flash_on for cua

[ronnie-liu]

Somebody asked me about the flash_on utility for the cua motherboard. You can
try the following code.

Ronnie
===============================================================================
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/io.h>

main()
{
     char b;

     /* get io privilege access PCI configuration space */
     if (iopl(3) != 0) {
          perror("Can not set io priviliage");
          exit(1);
     }

     /* BIOS region r/w reg 0x84~0x87 */
     outl(0x80000084, 0xcf8);
     outl(0x3ffffff8, 0x0cfc);

     /* Enable 0xFFF8000~0xFFFF0000 decoding reg 0x7f */
     outl(0x8000387c, 0x0cf8);
     b = inb(0x0cff) | 0x01;
     outb(b, 0xcff);
     /* Flash write enable reg 0x47 */
     outl(0x80003844, 0x0cf8);
     outb(0x7f, 0xcff);
}