2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
16 #ifndef CONFIG_WD_PERIOD
17 # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */
20 DECLARE_GLOBAL_DATA_PTR;
22 #ifdef CONFIG_SYS_TIMER_RATE
23 /* Returns tick rate in ticks per second */
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);
44 ulong notrace get_tbclk(void)
47 #ifdef CONFIG_TIMER_EARLY
48 return timer_early_get_rate();
52 ret = dm_timer_init();
58 return timer_get_rate(gd->timer);
61 uint64_t notrace get_ticks(void)
67 #ifdef CONFIG_TIMER_EARLY
68 return timer_early_get_count();
72 ret = dm_timer_init();
78 ret = timer_get_count(gd->timer, &count);
85 #else /* !CONFIG_TIMER */
87 uint64_t __weak notrace get_ticks(void)
89 unsigned long now = timer_read_counter();
91 /* increment tbu if tbl has rolled over */
92 if (now < gd->timebase_l)
95 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
98 #endif /* CONFIG_TIMER */
100 /* Returns time in milliseconds */
101 static uint64_t notrace tick_to_time(uint64_t tick)
103 ulong div = get_tbclk();
105 tick *= CONFIG_SYS_HZ;
110 int __weak timer_init(void)
115 /* Returns time in milliseconds */
116 ulong __weak get_timer(ulong base)
118 return tick_to_time(get_ticks()) - base;
121 unsigned long __weak notrace timer_get_us(void)
123 return tick_to_time(get_ticks() * 1000);
126 static uint64_t usec_to_tick(unsigned long usec)
128 uint64_t tick = usec;
130 do_div(tick, 1000000);
134 void __weak __udelay(unsigned long usec)
138 tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
140 while (get_ticks() < tmp+1) /* loop till event */
144 /* ------------------------------------------------------------------------- */
146 void udelay(unsigned long usec)
152 kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;