mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-16 16:23:14 +00:00
a86ac9540e
Since commit 0e7368c6c4 (kbuild: prepare for moving headers into
mach-*/include/mach), we can replace #include <asm/arch/*.h> with
<mach/*.h> so we do not need to create the symbolic link during the
build.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
39 lines
834 B
C
39 lines
834 B
C
/*
|
|
* Copyright (C) 2012-2014 Panasonic Corporation
|
|
* Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <mach/arm-mpcore.h>
|
|
|
|
#define PERIPHCLK (50 * 1000 * 1000) /* 50 MHz */
|
|
#define PRESCALER ((PERIPHCLK) / (CONFIG_SYS_TIMER_RATE) - 1)
|
|
|
|
static void *get_global_timer_base(void)
|
|
{
|
|
void *val;
|
|
|
|
asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (val) : : "memory");
|
|
|
|
return val + GLOBAL_TIMER_OFFSET;
|
|
}
|
|
|
|
unsigned long timer_read_counter(void)
|
|
{
|
|
/*
|
|
* ARM 64bit Global Timer is too much for our purpose.
|
|
* We use only lower 32 bit of the timer counter.
|
|
*/
|
|
return readl(get_global_timer_base() + GTIMER_CNT_L);
|
|
}
|
|
|
|
int timer_init(void)
|
|
{
|
|
/* enable timer */
|
|
writel(PRESCALER << 8 | 1, get_global_timer_base() + GTIMER_CTRL);
|
|
|
|
return 0;
|
|
}
|