mirror of
https://github.com/brain-hackers/u-boot-brain
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5025897774
There was for long time no activity in the 5xx area. We need to go further and convert to Kconfig, but it turned out, nobody is interested anymore in 5xx, so remove it. Signed-off-by: Heiko Schocher <hs@denx.de>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
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* (C) Copyright 2000, 2001
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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/* ------------------------------------------------------------------------- */
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/*
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* This function is intended for SHORT delays only.
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* It will overflow at around 10 seconds @ 400MHz,
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* or 20 seconds @ 200MHz.
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*/
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unsigned long usec2ticks(unsigned long usec)
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{
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ulong ticks;
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if (usec < 1000) {
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ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
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} else {
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ticks = ((usec / 10) * (get_tbclk() / 100000));
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}
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return (ticks);
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}
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/* ------------------------------------------------------------------------- */
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/*
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* We implement the delay by converting the delay (the number of
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* microseconds to wait) into a number of time base ticks; then we
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* watch the time base until it has incremented by that amount.
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*/
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void __udelay(unsigned long usec)
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{
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ulong ticks = usec2ticks (usec);
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wait_ticks (ticks);
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}
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/* ------------------------------------------------------------------------- */
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#ifndef CONFIG_NAND_SPL
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unsigned long ticks2usec(unsigned long ticks)
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{
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ulong tbclk = get_tbclk();
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/* usec = ticks * 1000000 / tbclk
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* Multiplication would overflow at ~4.2e3 ticks,
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* so we break it up into
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* usec = ( ( ticks * 1000) / tbclk ) * 1000;
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*/
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ticks *= 1000L;
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ticks /= tbclk;
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ticks *= 1000L;
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return ((ulong)ticks);
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}
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#endif
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/* ------------------------------------------------------------------------- */
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int timer_init(void)
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{
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unsigned long temp;
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/* reset */
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asm volatile("li %0,0 ; mttbu %0 ; mttbl %0;"
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: "=&r"(temp) );
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return (0);
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}
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/* ------------------------------------------------------------------------- */
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