1 /* vi: set ts=8 sw=8 noet: */
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Marius Groeger <mgroeger@sysgo.de>
8 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
9 * Alex Zuepke <azu@sysgo.de>
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/arch/ixp425.h>
33 void ixp425_udelay(unsigned long usec)
36 * This function has a max usec, but since it is called from udelay
37 * we should not have to worry... be happy
39 unsigned long usecs = CFG_HZ/1000000L & ~IXP425_OST_RELOAD_MASK;
41 *IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
42 usecs |= IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
43 *IXP425_OSRT1 = usecs;
44 while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND));
47 void udelay (unsigned long usec)
49 while (usec--) ixp425_udelay(1);
52 static ulong reload_constant = 0xfffffff0;
54 void reset_timer_masked (void)
56 ulong reload = reload_constant | IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
58 *IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
59 *IXP425_OSRT1 = reload;
62 ulong get_timer_masked (void)
65 * Note that it is possible for this to wrap!
66 * In this case we return max.
68 ulong current = *IXP425_OST1;
69 if (*IXP425_OSST & IXP425_OSST_TIMER_1_PEND)
71 return reload_constant;
73 return (reload_constant - current);