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15809248 WD |
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 <SA-1100.h> | |
31 | ||
15809248 WD |
32 | int interrupt_init (void) |
33 | { | |
34 | /* nothing happens here - we don't setup any IRQs */ | |
35 | return (0); | |
36 | } | |
37 | ||
38 | void reset_timer (void) | |
39 | { | |
40 | reset_timer_masked (); | |
41 | } | |
42 | ||
43 | ulong get_timer (ulong base) | |
44 | { | |
45 | return get_timer_masked (); | |
46 | } | |
47 | ||
48 | void set_timer (ulong t) | |
49 | { | |
50 | /* nop */ | |
51 | } | |
52 | ||
53 | void udelay (unsigned long usec) | |
54 | { | |
55 | udelay_masked (usec); | |
56 | } | |
57 | ||
58 | ||
59 | void reset_timer_masked (void) | |
60 | { | |
61 | OSCR = 0; | |
62 | } | |
63 | ||
64 | ulong get_timer_masked (void) | |
65 | { | |
66 | return OSCR; | |
67 | } | |
68 | ||
69 | void udelay_masked (unsigned long usec) | |
70 | { | |
71 | ulong tmo; | |
101e8dfa WD |
72 | ulong endtime; |
73 | signed long diff; | |
74 | ||
75 | if (usec >= 1000) { | |
76 | tmo = usec / 1000; | |
6d0f6bcf | 77 | tmo *= CONFIG_SYS_HZ; |
101e8dfa WD |
78 | tmo /= 1000; |
79 | } else { | |
6d0f6bcf | 80 | tmo = usec * CONFIG_SYS_HZ; |
101e8dfa WD |
81 | tmo /= (1000*1000); |
82 | } | |
83 | ||
84 | endtime = get_timer_masked () + tmo; | |
85 | ||
86 | do { | |
87 | ulong now = get_timer_masked (); | |
88 | diff = endtime - now; | |
89 | } while (diff >= 0); | |
15809248 | 90 | } |
aaf224ab WD |
91 | |
92 | /* | |
93 | * This function is derived from PowerPC code (read timebase as long long). | |
94 | * On ARM it just returns the timer value. | |
95 | */ | |
96 | unsigned long long get_ticks(void) | |
97 | { | |
98 | return get_timer(0); | |
99 | } | |
100 | ||
101 | /* | |
102 | * This function is derived from PowerPC code (timebase clock frequency). | |
103 | * On ARM it returns the number of timer ticks per second. | |
104 | */ | |
105 | ulong get_tbclk (void) | |
106 | { | |
107 | ulong tbclk; | |
108 | ||
6d0f6bcf | 109 | tbclk = CONFIG_SYS_HZ; |
aaf224ab WD |
110 | return tbclk; |
111 | } |