u-boot/arch/sparc/lib/time.c

/*
 * (C) Copyright 2000, 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2007
 * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>

/* Implemented by SPARC CPUs */
extern void cpu_wait_ticks(unsigned long ticks);
extern unsigned long cpu_usec2ticks(unsigned long usec);
extern unsigned long cpu_ticks2usec(unsigned long ticks);

/* ------------------------------------------------------------------------- */

void wait_ticks(unsigned long ticks)
{
	cpu_wait_ticks(ticks);
}

/*
 * This function is intended for SHORT delays only.
 */
unsigned long usec2ticks(unsigned long usec)
{
	return cpu_usec2ticks(usec);
}

/* ------------------------------------------------------------------------- */

/*
 * We implement the delay by converting the delay (the number of
 * microseconds to wait) into a number of time base ticks; then we
 * watch the time base until it has incremented by that amount.
 */
void __udelay(unsigned long usec)
{
	ulong ticks = usec2ticks(usec);

	wait_ticks(ticks);
}

/* ------------------------------------------------------------------------- */

unsigned long ticks2usec(unsigned long ticks)
{
	return cpu_ticks2usec(ticks);
}

/* ------------------------------------------------------------------------- */

int init_timebase(void)
{

	return (0);
}

/* ------------------------------------------------------------------------- */