/* * (C) Copyright 2000-2009 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <watchdog.h> #include <div64.h> #include <asm/io.h> #ifndef CONFIG_WD_PERIOD # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */ #endif DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_SYS_TIMER_RATE /* Returns tick rate in ticks per second */ ulong notrace get_tbclk(void) { return CONFIG_SYS_TIMER_RATE; } #endif #ifdef CONFIG_SYS_TIMER_COUNTER unsigned long notrace timer_read_counter(void) { #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN return ~readl(CONFIG_SYS_TIMER_COUNTER); #else return readl(CONFIG_SYS_TIMER_COUNTER); #endif } #else extern unsigned long __weak timer_read_counter(void); #endif uint64_t __weak notrace get_ticks(void) { unsigned long now = timer_read_counter(); /* increment tbu if tbl has rolled over */ if (now < gd->timebase_l) gd->timebase_h++; gd->timebase_l = now; return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l; } /* Returns time in milliseconds */ static uint64_t notrace tick_to_time(uint64_t tick) { ulong div = get_tbclk(); tick *= CONFIG_SYS_HZ; do_div(tick, div); return tick; } int __weak timer_init(void) { return 0; } /* Returns time in milliseconds */ ulong __weak get_timer(ulong base) { return tick_to_time(get_ticks()) - base; } unsigned long __weak notrace timer_get_us(void) { return tick_to_time(get_ticks() * 1000); } static uint64_t usec_to_tick(unsigned long usec) { uint64_t tick = usec; tick *= get_tbclk(); do_div(tick, 1000000); return tick; } void __weak __udelay(unsigned long usec) { uint64_t tmp; tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */ while (get_ticks() < tmp+1) /* loop till event */ /*NOP*/; } /* ------------------------------------------------------------------------- */ void udelay(unsigned long usec) { ulong kv; do { WATCHDOG_RESET(); kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec; __udelay (kv); usec -= kv; } while(usec); } void mdelay(unsigned long msec) { while (msec--) udelay(1000); }