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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / cpu / pxa / interrupts.c
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1/*
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 <asm/arch/pxa-regs.h>
31
32fe2871 32#ifdef CONFIG_USE_IRQ
32fe2871 33#error: interrupts not implemented yet
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34#endif
35
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36int interrupt_init (void)
37{
38 /* nothing happens here - we don't setup any IRQs */
39 return (0);
40}
41
42void reset_timer (void)
43{
44 reset_timer_masked ();
45}
46
47ulong get_timer (ulong base)
48{
f39748ae 49 return get_timer_masked () - base;
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50}
51
52void set_timer (ulong t)
53{
54 /* nop */
55}
56
57void udelay (unsigned long usec)
58{
59 udelay_masked (usec);
60}
61
62
63void reset_timer_masked (void)
64{
65 OSCR = 0;
66}
67
68ulong get_timer_masked (void)
69{
70 return OSCR;
71}
72
73void udelay_masked (unsigned long usec)
74{
75 ulong tmo;
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76 ulong endtime;
77 signed long diff;
32fe2871 78
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79 if (usec >= 1000) {
80 tmo = usec / 1000;
6d0f6bcf 81 tmo *= CONFIG_SYS_HZ;
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82 tmo /= 1000;
83 } else {
6d0f6bcf 84 tmo = usec * CONFIG_SYS_HZ;
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85 tmo /= (1000*1000);
86 }
32fe2871 87
101e8dfa 88 endtime = get_timer_masked () + tmo;
32fe2871 89
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90 do {
91 ulong now = get_timer_masked ();
92 diff = endtime - now;
93 } while (diff >= 0);
32fe2871 94}
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95
96/*
97 * This function is derived from PowerPC code (read timebase as long long).
98 * On ARM it just returns the timer value.
99 */
100unsigned long long get_ticks(void)
101{
102 return get_timer(0);
103}
104
105/*
106 * This function is derived from PowerPC code (timebase clock frequency).
107 * On ARM it returns the number of timer ticks per second.
108 */
109ulong get_tbclk (void)
110{
111 ulong tbclk;
6d0f6bcf 112 tbclk = CONFIG_SYS_HZ;
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113 return tbclk;
114}