Mercurial > sos > sos

view include/tod.h @ 99:2a0aa3efc228

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
The shell script will now theroretically load the program into memory, will not run it. The shell script loads a program into memory and displays the address but as of now does not jump to it (though it does display the address it would jump to) Added a memset function Added a python script (credit for its writing to Jeff) that sets up a filesystem
author Jonathan Pevarnek <pevarnj@gmail.com>
date Sat, 14 May 2011 19:40:18 -0400
parents 3b73044b740f
children
line wrap: on
line source

#ifndef __TOD_H
#define __TOD_H

/*
 * The Time Of Day (TOD) hardware adds 1 to the 51st bit every microsecond.
 * The TOD value 0 is defined as 00:00:00 on Jan 1, 1900.
 *
 * Here are the TOD values for each of the leap seconds, as well as the
 * beginning of UTC (Jan 1, 1970).
 *
 * Year  Month  Day  Leap Sec.  Clock Setting (Hex)
 * ------------------------------------------------
 * 1900      1    1       N/A   0000 0000 0000 0000
 * 1972      1    1       N/A   8126 D60E 4600 0000
 * 1972      7    1         1   820B A981 1E24 0000
 * 1973      1    1         2   82F3 00AE E248 0000
 * 1974      1    1         3   84BD E971 146C 0000
 * 1975      1    1         4   8688 D233 4690 0000
 * 1976      1    1         5   8853 BAF5 78B4 0000
 * 1977      1    1         6   8A1F E595 20D8 0000
 * 1978      1    1         7   8BEA CE57 52FC 0000
 * 1979      1    1         8   8DB5 B719 8520 0000
 * 1980      1    1         9   8F80 9FDB B744 0000
 * 1981      7    1        10   9230 5C0F CD68 0000
 * 1982      7    1        11   93FB 44D1 FF8C 0000
 * 1983      7    1        12   95C6 2D94 31B0 0000
 * 1985      7    1        13   995D 40F5 17D4 0000
 * 1988      1    1        14   9DDA 69A5 57F8 0000
 * 1990      1    1        15   A171 7D06 3E1C 0000
 * 1991      1    1        16   A33C 65C8 7040 0000
 * 1992      7    1        17   A5EC 21FC 8664 0000
 * 1993      7    1        18   A7B7 0ABE B888 0000
 * 1994      7    1        19   A981 F380 EAAC 0000
 * 1996      1    1        20   AC34 336F ECD0 0000
 * 1997      7    1        21   AEE3 EFA4 02F4 0000
 * 1999      1    1        22   B196 2F93 0518 0000
 * 2006      1    1        23   BE25 1097 973C 0000
 * 2009      1    1        24   C387 0CB9 BB60 0000
 */

#define TOD_MICROSEC		0x0000000000001000UL
#define TOD_SEC			0x0000000f4240000ULL
#define TOD_MIN			0x000003938700000ULL
#define TOD_HOUR		0x0000d693a400000ULL
#define TOD_DAY			0x00141dd76000000ULL
#define TOD_YEAR		0x1cae8c13e000000ULL /* not leap */
#define TOD_FOURYEARS		0x72ce4e26e000000ULL

/*
 * Stores (if possible) the current TOD value.
 *
 * Returns:
 *   0 on success, *tod contains current time & date
 *                 *tod == 0 is midnight, Jan 1, 1900
 *   1 on success, *tod contains uptime
 *                 *tod == 0 is the instant the system powered on
 *   2 or 3 on failure, value of *tod is unpredictable
 */
static inline ErrCode get_tod(u64 *tod)
{
	int cc;
	ErrCode ret = 0;

	asm volatile(
		"stck	%0\n"
		"ipm	%1\n"
		"srl	%1,28\n"
	: /* output */
	  "=m" (*tod),
	  "=d" (cc)
	: /* input */
	: /* clobber */
	  "cc"
	);
	switch(cc) {
		case 0:
			ret = 0;
			break;
		case 1:
			ret = mkError(MODTOD, UPTIME, WARN);
			break;
		case 2:
		case 3:
			ret = mkError(MODTOD, INVALID, ERROR);
			break;
	}

	return ret;
}

#endif