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author | Michael Sevakis <jethead71@rockbox.org> | 2008-10-29 10:26:46 +0000 |
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committer | Michael Sevakis <jethead71@rockbox.org> | 2008-10-29 10:26:46 +0000 |
commit | 48544f070b2319a5131f25c78516fbb9a1b2a123 (patch) | |
tree | 6bf210fb01101fad66fa717540c9038b4e19c9cc /firmware/target/coldfire | |
parent | 3bfc51d894536a411c4a0da85c0a428f341d8b80 (diff) | |
download | rockbox-48544f070b2319a5131f25c78516fbb9a1b2a123.tar.gz rockbox-48544f070b2319a5131f25c78516fbb9a1b2a123.zip |
Move kernel tick initialization and handling to the target tree for ones remaining in kernel.c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18919 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/coldfire')
-rw-r--r-- | firmware/target/coldfire/kernel-coldfire.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/firmware/target/coldfire/kernel-coldfire.c b/firmware/target/coldfire/kernel-coldfire.c new file mode 100644 index 0000000000..093736ee91 --- /dev/null +++ b/firmware/target/coldfire/kernel-coldfire.c | |||
@@ -0,0 +1,64 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Björn Stenberg | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | #include "config.h" | ||
22 | #include "system.h" | ||
23 | #include "kernel.h" | ||
24 | #include "panic.h" | ||
25 | |||
26 | void tick_start(unsigned int interval_in_ms) | ||
27 | { | ||
28 | unsigned long count; | ||
29 | int prescale; | ||
30 | |||
31 | count = CPU_FREQ/2 * interval_in_ms / 1000 / 16; | ||
32 | |||
33 | if(count > 0x10000) | ||
34 | { | ||
35 | panicf("Error! The tick interval is too long (%d ms)\n", | ||
36 | interval_in_ms); | ||
37 | return; | ||
38 | } | ||
39 | |||
40 | prescale = cpu_frequency / CPU_FREQ; | ||
41 | /* Note: The prescaler is later adjusted on-the-fly on CPU frequency | ||
42 | changes within timer.c */ | ||
43 | |||
44 | /* We are using timer 0 */ | ||
45 | |||
46 | TRR0 = (unsigned short)(count - 1); /* The reference count */ | ||
47 | TCN0 = 0; /* reset the timer */ | ||
48 | TMR0 = 0x001d | ((unsigned short)(prescale - 1) << 8); | ||
49 | /* restart, CLK/16, enabled, prescaler */ | ||
50 | |||
51 | TER0 = 0xff; /* Clear all events */ | ||
52 | |||
53 | ICR1 = 0x8c; /* Interrupt on level 3.0 */ | ||
54 | IMR &= ~0x200; | ||
55 | } | ||
56 | |||
57 | void TIMER0(void) __attribute__ ((interrupt_handler)); | ||
58 | void TIMER0(void) | ||
59 | { | ||
60 | /* Run through the list of tick tasks */ | ||
61 | call_tick_tasks(); | ||
62 | |||
63 | TER0 = 0xff; /* Clear all events */ | ||
64 | } | ||