1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2009
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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 ulong timer_get_boot_us(void)
42 ulong count = timer_read_counter();
44 #if CONFIG_SYS_TIMER_RATE == 1000000
46 #elif CONFIG_SYS_TIMER_RATE > 1000000
47 return lldiv(count, CONFIG_SYS_TIMER_RATE / 1000000);
48 #elif defined(CONFIG_SYS_TIMER_RATE)
49 return (unsigned long long)count * 1000000 / CONFIG_SYS_TIMER_RATE;
51 /* Assume the counter is in microseconds */
57 extern unsigned long __weak timer_read_counter(void);
60 #if CONFIG_IS_ENABLED(TIMER)
61 ulong notrace get_tbclk(void)
64 #ifdef CONFIG_TIMER_EARLY
65 return timer_early_get_rate();
69 ret = dm_timer_init();
75 return timer_get_rate(gd->timer);
78 uint64_t notrace get_ticks(void)
84 #ifdef CONFIG_TIMER_EARLY
85 return timer_early_get_count();
89 ret = dm_timer_init();
95 ret = timer_get_count(gd->timer, &count);
102 #else /* !CONFIG_TIMER */
104 uint64_t __weak notrace get_ticks(void)
106 unsigned long now = timer_read_counter();
108 /* increment tbu if tbl has rolled over */
109 if (now < gd->timebase_l)
111 gd->timebase_l = now;
112 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
115 #endif /* CONFIG_TIMER */
117 /* Returns time in milliseconds */
118 static uint64_t notrace tick_to_time(uint64_t tick)
120 ulong div = get_tbclk();
122 tick *= CONFIG_SYS_HZ;
127 int __weak timer_init(void)
132 /* Returns time in milliseconds */
133 ulong __weak get_timer(ulong base)
135 return tick_to_time(get_ticks()) - base;
138 static uint64_t notrace tick_to_time_us(uint64_t tick)
140 ulong div = get_tbclk() / 1000;
142 tick *= CONFIG_SYS_HZ;
147 uint64_t __weak get_timer_us(uint64_t base)
149 return tick_to_time_us(get_ticks()) - base;
152 unsigned long __weak notrace timer_get_us(void)
154 return tick_to_time(get_ticks() * 1000);
157 uint64_t usec_to_tick(unsigned long usec)
159 uint64_t tick = usec;
161 do_div(tick, 1000000);
165 void __weak __udelay(unsigned long usec)
169 tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
171 while (get_ticks() < tmp+1) /* loop till event */
175 /* ------------------------------------------------------------------------- */
177 void udelay(unsigned long usec)
183 kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;