source: mainline/kernel/genarch/src/drivers/bcm2835/timer.c

Last change on this file was 67bcd81, checked in by Jiri Svoboda <jiri@…>, 6 years ago

Move bcm2835 mbox code from headers to C files (ccheck)

New ccheck rev. found that variable shortcut_inums is defined (non-static)
in a header. The real problem here is that the code of
irc and timer modules is contained in headers instead of C files,
so just move them to the C files.

  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 * Copyright (c) 2019 Jiri Svoboda
3 * Copyright (c) 2013 Beniamino Galvani
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * - The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29/** @addtogroup kernel_genarch
30 * @{
31 */
32/**
33 * @file
34 * @brief Broadcom BCM2835 system timer driver.
35 */
36
37#include <assert.h>
38#include <genarch/drivers/bcm2835/timer.h>
39#include <time/clock.h>
40
41void bcm2835_timer_start(bcm2835_timer_t *timer)
42{
43 assert(timer);
44 /* Clear pending interrupt on channel 1 */
45 timer->cs |= BCM2835_TIMER_CS_M1;
46 /* Initialize compare value for match channel 1 */
47 timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ);
48}
49
50void bcm2835_timer_irq_ack(bcm2835_timer_t *timer)
51{
52 assert(timer);
53 /* Clear pending interrupt on channel 1 */
54 timer->cs |= BCM2835_TIMER_CS_M1;
55 /* Reprogram compare value for match channel 1 */
56 timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ);
57}
58
59/**
60 * @}
61 */
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