xref: /titanic_51/usr/src/psm/promif/ieee1275/common/prom_gettime.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright (c) 1991-1994, by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate  * All rights reserved.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*7c478bd9Sstevel@tonic-gate 
29*7c478bd9Sstevel@tonic-gate #include <sys/promif.h>
30*7c478bd9Sstevel@tonic-gate #include <sys/promimpl.h>
31*7c478bd9Sstevel@tonic-gate 
32*7c478bd9Sstevel@tonic-gate /*
33*7c478bd9Sstevel@tonic-gate  * This prom entry point cannot be used once the kernel is up
34*7c478bd9Sstevel@tonic-gate  * and running (after stop_mon_clock is called) since the kernel
35*7c478bd9Sstevel@tonic-gate  * takes over level 14 interrupt handling which the PROM depends
36*7c478bd9Sstevel@tonic-gate  * on to update the time.
37*7c478bd9Sstevel@tonic-gate  */
38*7c478bd9Sstevel@tonic-gate 
39*7c478bd9Sstevel@tonic-gate u_int
40*7c478bd9Sstevel@tonic-gate prom_gettime(void)
41*7c478bd9Sstevel@tonic-gate {
42*7c478bd9Sstevel@tonic-gate 	cell_t ci[4];
43*7c478bd9Sstevel@tonic-gate 
44*7c478bd9Sstevel@tonic-gate 	ci[0] = p1275_ptr2cell("milliseconds");	/* Service name */
45*7c478bd9Sstevel@tonic-gate 	ci[1] = (cell_t)0;			/* #argument cells */
46*7c478bd9Sstevel@tonic-gate 	ci[2] = (cell_t)1;			/* #return cells */
47*7c478bd9Sstevel@tonic-gate 
48*7c478bd9Sstevel@tonic-gate 	promif_preprom();
49*7c478bd9Sstevel@tonic-gate 	(void) p1275_cif_handler(&ci);
50*7c478bd9Sstevel@tonic-gate 	promif_postprom();
51*7c478bd9Sstevel@tonic-gate 
52*7c478bd9Sstevel@tonic-gate 	return (p1275_cell2uint(ci[3]));	/* Res0: time in ms. */
53*7c478bd9Sstevel@tonic-gate }
54