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git.ipfire.org Git - people/ms/u-boot.git/blob - lib/time.c
2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
13 #if CONFIG_SYS_HZ != 1000
14 #warning "CONFIG_SYS_HZ must be 1000 and should not be defined by platforms"
17 #ifndef CONFIG_WD_PERIOD
18 # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default*/
21 DECLARE_GLOBAL_DATA_PTR
;
23 #ifdef CONFIG_SYS_TIMER_RATE
24 ulong notrace
get_tbclk(void)
26 return CONFIG_SYS_TIMER_RATE
;
30 #ifdef CONFIG_SYS_TIMER_COUNTER
31 unsigned long notrace
timer_read_counter(void)
33 #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
34 return ~readl(CONFIG_SYS_TIMER_COUNTER
);
36 return readl(CONFIG_SYS_TIMER_COUNTER
);
40 extern unsigned long __weak
timer_read_counter(void);
43 unsigned long long __weak notrace
get_ticks(void)
45 unsigned long now
= timer_read_counter();
47 /* increment tbu if tbl has rolled over */
48 if (now
< gd
->timebase_l
)
51 return ((unsigned long long)gd
->timebase_h
<< 32) | gd
->timebase_l
;
54 static unsigned long long notrace
tick_to_time(uint64_t tick
)
56 unsigned int div
= get_tbclk();
58 tick
*= CONFIG_SYS_HZ
;
63 int __weak
timer_init(void)
68 ulong __weak
get_timer(ulong base
)
70 return tick_to_time(get_ticks()) - base
;
73 unsigned long __weak notrace
timer_get_us(void)
75 return tick_to_time(get_ticks() * 1000);
77 static unsigned long long usec_to_tick(unsigned long usec
)
81 do_div(tick
, 1000000);
85 void __weak
__udelay(unsigned long usec
)
87 unsigned long long tmp
;
90 tmo
= usec_to_tick(usec
);
91 tmp
= get_ticks() + tmo
; /* get current timestamp */
93 while (get_ticks() < tmp
) /* loop till event */
97 /* ------------------------------------------------------------------------- */
99 void udelay(unsigned long usec
)
105 kv
= usec
> CONFIG_WD_PERIOD
? CONFIG_WD_PERIOD
: usec
;
111 void mdelay(unsigned long msec
)