2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
13 #ifndef CONFIG_WD_PERIOD
14 # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */
17 DECLARE_GLOBAL_DATA_PTR;
19 #ifdef CONFIG_SYS_TIMER_RATE
20 /* Returns tick rate in ticks per second */
21 ulong notrace get_tbclk(void)
23 return CONFIG_SYS_TIMER_RATE;
27 #ifdef CONFIG_SYS_TIMER_COUNTER
28 unsigned long notrace timer_read_counter(void)
30 #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
31 return ~readl(CONFIG_SYS_TIMER_COUNTER);
33 return readl(CONFIG_SYS_TIMER_COUNTER);
37 extern unsigned long __weak timer_read_counter(void);
40 uint64_t __weak notrace get_ticks(void)
42 unsigned long now = timer_read_counter();
44 /* increment tbu if tbl has rolled over */
45 if (now < gd->timebase_l)
48 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
51 /* Returns time in milliseconds */
52 static uint64_t notrace tick_to_time(uint64_t tick)
54 ulong div = get_tbclk();
56 tick *= CONFIG_SYS_HZ;
61 int __weak timer_init(void)
66 /* Returns time in milliseconds */
67 ulong __weak get_timer(ulong base)
69 return tick_to_time(get_ticks()) - base;
72 unsigned long __weak notrace timer_get_us(void)
74 return tick_to_time(get_ticks() * 1000);
77 static uint64_t usec_to_tick(unsigned long usec)
81 do_div(tick, 1000000);
85 void __weak __udelay(unsigned long usec)
89 tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
91 while (get_ticks() < tmp+1) /* loop till event */
95 /* ------------------------------------------------------------------------- */
97 void udelay(unsigned long usec)
103 kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
109 void mdelay(unsigned long msec)