mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-29 05:18:51 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
|
|
* (C) Copyright 2012 Renesas Solutions Corp.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <div64.h>
|
|
#include <init.h>
|
|
#include <time.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch-armv7/globaltimer.h>
|
|
#include <asm/arch/rmobile.h>
|
|
#include <linux/delay.h>
|
|
|
|
static struct globaltimer *global_timer = \
|
|
(struct globaltimer *)GLOBAL_TIMER_BASE_ADDR;
|
|
|
|
#define CLK2MHZ(clk) (clk / 1000 / 1000)
|
|
static u64 get_cpu_global_timer(void)
|
|
{
|
|
u32 low, high;
|
|
u64 timer;
|
|
|
|
u32 old = readl(&global_timer->cnt_h);
|
|
while (1) {
|
|
low = readl(&global_timer->cnt_l);
|
|
high = readl(&global_timer->cnt_h);
|
|
if (old == high)
|
|
break;
|
|
else
|
|
old = high;
|
|
}
|
|
|
|
timer = high;
|
|
return (u64)((timer << 32) | low);
|
|
}
|
|
|
|
static u64 get_time_us(void)
|
|
{
|
|
u64 timer = get_cpu_global_timer();
|
|
|
|
timer = ((timer << 2) + (CLK2MHZ(CONFIG_SYS_CPU_CLK) >> 1));
|
|
do_div(timer, CLK2MHZ(CONFIG_SYS_CPU_CLK));
|
|
return timer;
|
|
}
|
|
|
|
static ulong get_time_ms(void)
|
|
{
|
|
u64 us = get_time_us();
|
|
|
|
do_div(us, 1000);
|
|
return us;
|
|
}
|
|
|
|
int timer_init(void)
|
|
{
|
|
writel(0x01, &global_timer->ctl);
|
|
return 0;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
u64 start, current;
|
|
u64 wait;
|
|
|
|
start = get_cpu_global_timer();
|
|
wait = (u64)((usec * CLK2MHZ(CONFIG_SYS_CPU_CLK)) >> 2);
|
|
do {
|
|
current = get_cpu_global_timer();
|
|
} while ((current - start) < wait);
|
|
}
|
|
|
|
ulong get_timer(ulong base)
|
|
{
|
|
return get_time_ms() - base;
|
|
}
|
|
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
return get_cpu_global_timer();
|
|
}
|
|
|
|
ulong get_tbclk(void)
|
|
{
|
|
return (ulong)(CONFIG_SYS_CPU_CLK >> 2);
|
|
}
|