Esempio n. 1
0
static inline __attribute__((unused)) int do_normal_boot(void)
{
	unsigned char byte;

	if (cmos_error() || !cmos_chksum_valid()) {
		/* Invalid CMOS checksum detected!
		 * Force fallback boot...
		 */
		byte = cmos_read(RTC_BOOT_BYTE);
		byte &= boot_set_fallback(byte) & 0x0f;
		byte |= 0xf << 4;
		cmos_write(byte, RTC_BOOT_BYTE);
	}

	/* The RTC_BOOT_BYTE is now o.k. see where to go. */
	byte = cmos_read(RTC_BOOT_BYTE);

	/* Are we attempting to boot normally? */
	if (boot_use_normal(byte)) {
		/* Are we already at the max count? */
		if (boot_count(byte) < CONFIG_MAX_REBOOT_CNT)
			byte = increment_boot_count(byte);
		else
			byte = boot_set_fallback(byte);
	}

	/* Save the boot byte */
	cmos_write(byte, RTC_BOOT_BYTE);

	/* Return selected code path for this boot attempt */
	return boot_use_normal(byte);
}
Esempio n. 2
0
static inline void check_cmos( void ) {

	char *cmos_default = NULL;
	int i;
#if DUMP_CMOS_RAM
	u8 c = 0;
#endif
	if (cmos_error() || !cmos_chksum_valid()) {
		cmos_default = cbfs_find_file("cmos.default", 0xaa);
		if (cmos_default) {
#if DUMP_CMOS_RAM
			__DEBUG__("Write cmos default ...\n");
#endif
			outb(0x0a,0x72);
			i = inb(0x73);
			i &= ~(1 << 4);
			outb(i,0x73);

			for (i = 14; i < 128; i++) {
#if DUMP_CMOS_RAM
				if( c%16 == 0 ) __DEBUG__("%02x:", i);
				__DEBUG__(" %02x", (u8)cmos_default[i]);
				if( c%16 == 15 ) __DEBUG__("\n");
				c++;
#endif
				outb(i,0x72);
				outb(cmos_default[i],0x73);
			}

#if DUMP_CMOS_RAM
			__DEBUG__("\n");
#endif
			if( !cmos_chksum_valid() )
				__DEBUG__("CMOS CHECKSUM ERROR\n");
			/* Now reboot to run with default cmos. */
			outb(0x06, 0xcf9);
			for (;;) asm("hlt"); /* Wait for reset! */
		}
	}

	// update altcentury
	outb(0x32, 0x72);
	i = inb(0x73);
	if ( i != 0x20 ) {
		outb(0x20,0x73);
		set_chksum(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC);
	}

}