blob: 020750125af3929c6d94547a0a8832eae685db24 [file] [log] [blame]
wdenk15809242002-09-08 20:56:32 +00001/*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2002
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Alex Zuepke <azu@sysgo.de>
9 *
10 * See file CREDITS for list of people who contributed to this
11 * project.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 * MA 02111-1307 USA
27 */
28
29#include <common.h>
30#include <SA-1100.h>
31
Jean-Christophe PLAGNIOL-VILLARDb54384e2009-05-15 23:47:02 +020032int timer_init (void)
wdenk15809242002-09-08 20:56:32 +000033{
Jean-Christophe PLAGNIOL-VILLARDb54384e2009-05-15 23:47:02 +020034 return 0;
wdenk15809242002-09-08 20:56:32 +000035}
36
37void reset_timer (void)
38{
39 reset_timer_masked ();
40}
41
42ulong get_timer (ulong base)
43{
44 return get_timer_masked ();
45}
46
47void set_timer (ulong t)
48{
49 /* nop */
50}
51
Ingo van Lil3eb90ba2009-11-24 14:09:21 +010052void __udelay (unsigned long usec)
wdenk15809242002-09-08 20:56:32 +000053{
54 udelay_masked (usec);
55}
56
57
58void reset_timer_masked (void)
59{
60 OSCR = 0;
61}
62
63ulong get_timer_masked (void)
64{
65 return OSCR;
66}
67
68void udelay_masked (unsigned long usec)
69{
70 ulong tmo;
wdenk101e8df2005-04-04 12:08:28 +000071 ulong endtime;
72 signed long diff;
wdenk15809242002-09-08 20:56:32 +000073
wdenk101e8df2005-04-04 12:08:28 +000074 if (usec >= 1000) {
75 tmo = usec / 1000;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020076 tmo *= CONFIG_SYS_HZ;
wdenk101e8df2005-04-04 12:08:28 +000077 tmo /= 1000;
78 } else {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020079 tmo = usec * CONFIG_SYS_HZ;
wdenk101e8df2005-04-04 12:08:28 +000080 tmo /= (1000*1000);
81 }
wdenk15809242002-09-08 20:56:32 +000082
wdenk101e8df2005-04-04 12:08:28 +000083 endtime = get_timer_masked () + tmo;
wdenk15809242002-09-08 20:56:32 +000084
wdenk101e8df2005-04-04 12:08:28 +000085 do {
86 ulong now = get_timer_masked ();
87 diff = endtime - now;
88 } while (diff >= 0);
wdenk15809242002-09-08 20:56:32 +000089}
wdenkaaf224a2004-03-14 15:20:55 +000090
91/*
92 * This function is derived from PowerPC code (read timebase as long long).
93 * On ARM it just returns the timer value.
94 */
95unsigned long long get_ticks(void)
96{
97 return get_timer(0);
98}
99
100/*
101 * This function is derived from PowerPC code (timebase clock frequency).
102 * On ARM it returns the number of timer ticks per second.
103 */
104ulong get_tbclk (void)
105{
106 ulong tbclk;
107
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200108 tbclk = CONFIG_SYS_HZ;
wdenkaaf224a2004-03-14 15:20:55 +0000109 return tbclk;
110}