lib_m68k/time.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de>
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>

 #include <asm/mcftimer.h>
 #include <asm/timer.h>
 #include <asm/immap.h>

 #ifdef	CONFIG_M5271
 #include <asm/m5271.h>
 #include <asm/immap_5271.h>
 #endif

 #ifdef	CONFIG_M5272
 #include <asm/m5272.h>
 #include <asm/immap_5272.h>
 #endif

 #ifdef	CONFIG_M5282
 #include <asm/m5282.h>
 #endif

 #ifdef	CONFIG_M5249
 #include <asm/m5249.h>
 #include <asm/immap_5249.h>
 #endif

 static ulong timestamp;
 #if defined(CONFIG_M5282) || defined(CONFIG_M5271)
 static unsigned short lastinc;
 #endif

 #if defined(CONFIG_M5272)
 /*
  * We use timer 3 which is running with a period of 1 us
  */
 void udelay(unsigned long usec)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE3);
 	uint start, now, tmp;

 	while (usec > 0) {
 		if (usec > 65000)
 			tmp = 65000;
 		else
 			tmp = usec;
 		usec = usec - tmp;

 		/* Set up TIMER 3 as timebase clock */
 		timerp->timer_tmr = MCFTIMER_TMR_DISABLE;
 		timerp->timer_tcn = 0;
 		/* set period to 1 us */
 		timerp->timer_tmr =
 		    (((CFG_CLK / 1000000) -
 		      1) << 8) | MCFTIMER_TMR_CLK1 | MCFTIMER_TMR_FREERUN |
 		    MCFTIMER_TMR_ENABLE;

 		start = now = timerp->timer_tcn;
 		while (now < start + tmp)
 			now = timerp->timer_tcn;
 	}
 }

 void mcf_timer_interrupt(void *not_used)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE4);
 	volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);

 	/* check for timer 4 interrupts */
 	if ((intp->int_isr & 0x01000000) != 0) {
 		return;
 	}

 	/* reset timer */
 	timerp->timer_ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF;
 	timestamp++;
 }

 void timer_init(void)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE4);
 	volatile intctrl_t *intp = (intctrl_t *) (CFG_MBAR + MCFSIM_ICR1);

 	timestamp = 0;

 	/* Set up TIMER 4 as clock */
 	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;

 	/* initialize and enable timer 4 interrupt */
 	irq_install_handler(72, mcf_timer_interrupt, 0);
 	intp->int_icr1 |= 0x0000000d;

 	timerp->timer_tcn = 0;
 	timerp->timer_trr = 1000;	/* Interrupt every ms */
 	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
 	timerp->timer_tmr =
 	    (((CFG_CLK / 1000000) -
 	      1) << 8) | MCFTIMER_TMR_CLK1 | MCFTIMER_TMR_RESTART |
 	    MCFTIMER_TMR_ENORI | MCFTIMER_TMR_ENABLE;
 }

 void reset_timer(void)
 {
 	timestamp = 0;
 }

 ulong get_timer(ulong base)
 {
 	return (timestamp - base);
 }

 void set_timer(ulong t)
 {
 	timestamp = t;
 }
 #endif

 #if defined(CONFIG_M5282) || defined(CONFIG_M5271)

 void udelay(unsigned long usec)
 {
 	volatile unsigned short *timerp;
 	uint tmp;

 	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE3);

 	while (usec > 0) {
 		if (usec > 65000)
 			tmp = 65000;
 		else
 			tmp = usec;
 		usec = usec - tmp;

 		/* Set up TIMER 3 as timebase clock */
 		timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
 		timerp[MCFTIMER_PMR] = 0;
 		/* set period to 1 us */
 		timerp[MCFTIMER_PCSR] =
 #ifdef CONFIG_M5271
 		    (6 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
 #else				/* !CONFIG_M5271 */
 		    (5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
 #endif				/* CONFIG_M5271 */

 		timerp[MCFTIMER_PMR] = tmp;
 		while (timerp[MCFTIMER_PCNTR] > 0) ;
 	}
 }

 void timer_init(void)
 {
 	volatile unsigned short *timerp;

 	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
 	timestamp = 0;

 	/* Set up TIMER 4 as poll clock */
 	timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
 	timerp[MCFTIMER_PMR] = lastinc = 0;
 	timerp[MCFTIMER_PCSR] =
 #ifdef CONFIG_M5271
 	    (6 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
 #else				/* !CONFIG_M5271 */
 	    (5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
 #endif				/* CONFIG_M5271 */
 }

 void set_timer(ulong t)
 {
 	volatile unsigned short *timerp;

 	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
 	timestamp = 0;
 	timerp[MCFTIMER_PMR] = lastinc = 0;
 }

 ulong get_timer(ulong base)
 {
 	unsigned short now, diff;
 	volatile unsigned short *timerp;

 	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
 	now = timerp[MCFTIMER_PCNTR];
 	diff = -(now - lastinc);

 	timestamp += diff;
 	lastinc = now;
 	return timestamp - base;
 }

 void wait_ticks(unsigned long ticks)
 {
 	set_timer(0);
 	while (get_timer(0) < ticks) ;
 }
 #endif

 #if defined(CONFIG_M5249)
 /*
  * We use timer 1 which is running with a period of 1 us
  */
 void udelay(unsigned long usec)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE1);
 	uint start, now, tmp;

 	while (usec > 0) {
 		if (usec > 65000)
 			tmp = 65000;
 		else
 			tmp = usec;
 		usec = usec - tmp;

 		/* Set up TIMER 1 as timebase clock */
 		timerp->timer_tmr = MCFTIMER_TMR_DISABLE;
 		timerp->timer_tcn = 0;
 		/* set period to 1 us */
 		/* on m5249 the system clock is (cpu_clk / 2) -> divide by 2000000 */
 		timerp->timer_tmr =
 		    (((CFG_CLK / 2000000) -
 		      1) << 8) | MCFTIMER_TMR_CLK1 | MCFTIMER_TMR_FREERUN |
 		    MCFTIMER_TMR_ENABLE;

 		start = now = timerp->timer_tcn;
 		while (now < start + tmp)
 			now = timerp->timer_tcn;
 	}
 }

 void mcf_timer_interrupt(void *not_used)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE2);

 	/* check for timer 2 interrupts */
 	if ((mbar_readLong(MCFSIM_IPR) & 0x00000400) == 0) {
 		return;
 	}

 	/* reset timer */
 	timerp->timer_ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF;
 	timestamp++;
 }

 void timer_init(void)
 {
 	volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE2);

 	timestamp = 0;

 	/* Set up TIMER 2 as clock */
 	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;

 	/* initialize and enable timer 2 interrupt */
 	irq_install_handler(31, mcf_timer_interrupt, 0);
 	mbar_writeLong(MCFSIM_IMR, mbar_readLong(MCFSIM_IMR) & ~0x00000400);
 	mbar_writeByte(MCFSIM_TIMER2ICR,
 		       MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL7 |
 		       MCFSIM_ICR_PRI3);

 	timerp->timer_tcn = 0;
 	timerp->timer_trr = 1000;	/* Interrupt every ms */
 	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
 	/* on m5249 the system clock is (cpu_clk / 2) -> divide by 2000000 */
 	timerp->timer_tmr =
 	    (((CFG_CLK / 2000000) -
 	      1) << 8) | MCFTIMER_TMR_CLK1 | MCFTIMER_TMR_RESTART |
 	    MCFTIMER_TMR_ENORI | MCFTIMER_TMR_ENABLE;
 }

 void reset_timer(void)
 {
 	timestamp = 0;
 }

 ulong get_timer(ulong base)
 {
 	return (timestamp - base);
 }

 void set_timer(ulong t)
 {
 	timestamp = t;
 }
 #endif

 #if defined(CONFIG_MCFTMR)
 #ifndef CFG_UDELAY_BASE
 #	error	"uDelay base not defined!"
 #endif

 #if !defined(CFG_TMR_BASE) || !defined(CFG_INTR_BASE) || !defined(CFG_TMRINTR_NO) || !defined(CFG_TMRINTR_MASK)
 #	error	"TMR_BASE, INTR_BASE, TMRINTR_NO or TMRINTR_MASk not defined!"
 #endif
 extern void dtimer_intr_setup(void);

 void udelay(unsigned long usec)
 {
 	volatile dtmr_t *timerp = (dtmr_t *) (CFG_UDELAY_BASE);
 	uint start, now, tmp;

 	while (usec > 0) {
 		if (usec > 65000)
 			tmp = 65000;
 		else
 			tmp = usec;
 		usec = usec - tmp;

 		/* Set up TIMER 3 as timebase clock */
 		timerp->tmr = DTIM_DTMR_RST_RST;
 		timerp->tcn = 0;
 		/* set period to 1 us */
 		timerp->tmr =
 		    CFG_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 | DTIM_DTMR_FRR |
 		    DTIM_DTMR_RST_EN;

 		start = now = timerp->tcn;
 		while (now < start + tmp)
 			now = timerp->tcn;
 	}
 }

 void dtimer_interrupt(void *not_used)
 {
 	volatile dtmr_t *timerp = (dtmr_t *) (CFG_TMR_BASE);
 	volatile int0_t *intp = (int0_t *) (CFG_INTR_BASE);

 	/* check for timer interrupt asserted */
 	if ((intp->iprh0 & CFG_TMRINTR_MASK) == CFG_TMRINTR_MASK) {
 		timerp->ter = (DTIM_DTER_CAP | DTIM_DTER_REF);
 		timestamp++;
 		return;
 	}
 }

 void timer_init(void)
 {
 	volatile dtmr_t *timerp = (dtmr_t *) (CFG_TMR_BASE);

 	timestamp = 0;

 	timerp->tcn = 0;
 	timerp->trr = 0;

 	/* Set up TIMER 4 as clock */
 	timerp->tmr = DTIM_DTMR_RST_RST;

 	/* initialize and enable timer interrupt */
 	irq_install_handler(CFG_TMRINTR_NO, dtimer_interrupt, 0);

 	timerp->tcn = 0;
 	timerp->trr = 1000;	/* Interrupt every ms */

 	dtimer_intr_setup();

 	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
 	timerp->tmr = CFG_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 |
 	    DTIM_DTMR_FRR | DTIM_DTMR_ORRI | DTIM_DTMR_RST_EN;
 }

 void reset_timer(void)
 {
 	timestamp = 0;
 }

 ulong get_timer(ulong base)
 {
 	return (timestamp - base);
 }

 void set_timer(ulong t)
 {
 	timestamp = t;
 }
 #endif				/* CONFIG_MCFTMR */

 #if defined(CONFIG_MCFPIT)
 #if !defined(CFG_PIT_BASE)
 #	error	"CFG_PIT_BASE not defined!"
 #endif

 static unsigned short lastinc;

 void udelay(unsigned long usec)
 {
 	volatile pit_t *timerp = (pit_t *) (CFG_UDELAY_BASE);
 	uint tmp;

 	while (usec > 0) {
 		if (usec > 65000)
 			tmp = 65000;
 		else
 			tmp = usec;
 		usec = usec - tmp;

 		/* Set up TIMER 3 as timebase clock */
 		timerp->pcsr = PIT_PCSR_OVW;
 		timerp->pmr = 0;
 		/* set period to 1 us */
 		timerp->pcsr |= PIT_PCSR_PRE(CFG_PIT_PRESCALE) | PIT_PCSR_EN;

 		timerp->pmr = tmp;
 		while (timerp->pcntr > 0) ;
 	}
 }

 void timer_init(void)
 {
 	volatile pit_t *timerp = (pit_t *) (CFG_PIT_BASE);
 	timestamp = 0;

 	/* Set up TIMER 4 as poll clock */
 	timerp->pcsr = PIT_PCSR_OVW;
 	timerp->pmr = lastinc = 0;
 	timerp->pcsr |= PIT_PCSR_PRE(CFG_PIT_PRESCALE) | PIT_PCSR_EN;
 }

 void set_timer(ulong t)
 {
 	volatile pit_t *timerp = (pit_t *) (CFG_PIT_BASE);

 	timestamp = 0;
 	timerp->pmr = lastinc = 0;
 }

 ulong get_timer(ulong base)
 {
 	unsigned short now, diff;
 	volatile pit_t *timerp = (pit_t *) (CFG_PIT_BASE);

 	now = timerp->pcntr;
 	diff = -(now - lastinc);

 	timestamp += diff;
 	lastinc = now;
 	return timestamp - base;
 }

 void wait_ticks(unsigned long ticks)
 {
 	set_timer(0);
 	while (get_timer(0) < ticks) ;
 }
 #endif				/* CONFIG_MCFPIT */

 /*
  * This function is derived from PowerPC code (read timebase as long long).
  * On M68K it just returns the timer value.
  */
 unsigned long long get_ticks(void)
 {
 	return get_timer(0);
 }

 /*
  * This function is derived from PowerPC code (timebase clock frequency).
  * On M68K it returns the number of timer ticks per second.
  */
 ulong get_tbclk(void)
 {
 	ulong tbclk;
 	tbclk = CFG_HZ;
 	return tbclk;
 }
	/*
	* (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de>
	*
	* (C) Copyright 2000
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>

	#include <asm/mcftimer.h>
	#include <asm/timer.h>
	#include <asm/immap.h>

	#ifdef CONFIG_M5271
	#include <asm/m5271.h>
	#include <asm/immap_5271.h>
	#endif

	#ifdef CONFIG_M5272
	#include <asm/m5272.h>
	#include <asm/immap_5272.h>
	#endif

	#ifdef CONFIG_M5282
	#include <asm/m5282.h>
	#endif

	#ifdef CONFIG_M5249
	#include <asm/m5249.h>
	#include <asm/immap_5249.h>
	#endif

	static ulong timestamp;
	#if defined(CONFIG_M5282) \|\| defined(CONFIG_M5271)
	static unsigned short lastinc;
	#endif

	#if defined(CONFIG_M5272)
	/*
	* We use timer 3 which is running with a period of 1 us
	*/
	void udelay(unsigned long usec)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE3);
	uint start, now, tmp;

	while (usec > 0) {
	if (usec > 65000)
	tmp = 65000;
	else
	tmp = usec;
	usec = usec - tmp;

	/* Set up TIMER 3 as timebase clock */
	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;
	timerp->timer_tcn = 0;
	/* set period to 1 us */
	timerp->timer_tmr =
	(((CFG_CLK / 1000000) -
	1) << 8) \| MCFTIMER_TMR_CLK1 \| MCFTIMER_TMR_FREERUN \|
	MCFTIMER_TMR_ENABLE;

	start = now = timerp->timer_tcn;
	while (now < start + tmp)
	now = timerp->timer_tcn;
	}
	}

	void mcf_timer_interrupt(void *not_used)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE4);
	volatile intctrl_t intp = (intctrl_t ) (CFG_MBAR + MCFSIM_ICR1);

	/* check for timer 4 interrupts */
	if ((intp->int_isr & 0x01000000) != 0) {
	return;
	}

	/* reset timer */
	timerp->timer_ter = MCFTIMER_TER_CAP \| MCFTIMER_TER_REF;
	timestamp++;
	}

	void timer_init(void)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE4);
	volatile intctrl_t intp = (intctrl_t ) (CFG_MBAR + MCFSIM_ICR1);

	timestamp = 0;

	/* Set up TIMER 4 as clock */
	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;

	/* initialize and enable timer 4 interrupt */
	irq_install_handler(72, mcf_timer_interrupt, 0);
	intp->int_icr1 \|= 0x0000000d;

	timerp->timer_tcn = 0;
	timerp->timer_trr = 1000; /* Interrupt every ms */
	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
	timerp->timer_tmr =
	(((CFG_CLK / 1000000) -
	1) << 8) \| MCFTIMER_TMR_CLK1 \| MCFTIMER_TMR_RESTART \|
	MCFTIMER_TMR_ENORI \| MCFTIMER_TMR_ENABLE;
	}

	void reset_timer(void)
	{
	timestamp = 0;
	}

	ulong get_timer(ulong base)
	{
	return (timestamp - base);
	}

	void set_timer(ulong t)
	{
	timestamp = t;
	}
	#endif

	#if defined(CONFIG_M5282) \|\| defined(CONFIG_M5271)

	void udelay(unsigned long usec)
	{
	volatile unsigned short *timerp;
	uint tmp;

	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE3);

	while (usec > 0) {
	if (usec > 65000)
	tmp = 65000;
	else
	tmp = usec;
	usec = usec - tmp;

	/* Set up TIMER 3 as timebase clock */
	timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
	timerp[MCFTIMER_PMR] = 0;
	/* set period to 1 us */
	timerp[MCFTIMER_PCSR] =
	#ifdef CONFIG_M5271
	(6 << 8) \| MCFTIMER_PCSR_EN \| MCFTIMER_PCSR_OVW;
	#else /* !CONFIG_M5271 */
	(5 << 8) \| MCFTIMER_PCSR_EN \| MCFTIMER_PCSR_OVW;
	#endif /* CONFIG_M5271 */

	timerp[MCFTIMER_PMR] = tmp;
	while (timerp[MCFTIMER_PCNTR] > 0) ;
	}
	}

	void timer_init(void)
	{
	volatile unsigned short *timerp;

	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
	timestamp = 0;

	/* Set up TIMER 4 as poll clock */
	timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
	timerp[MCFTIMER_PMR] = lastinc = 0;
	timerp[MCFTIMER_PCSR] =
	#ifdef CONFIG_M5271
	(6 << 8) \| MCFTIMER_PCSR_EN \| MCFTIMER_PCSR_OVW;
	#else /* !CONFIG_M5271 */
	(5 << 8) \| MCFTIMER_PCSR_EN \| MCFTIMER_PCSR_OVW;
	#endif /* CONFIG_M5271 */
	}

	void set_timer(ulong t)
	{
	volatile unsigned short *timerp;

	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
	timestamp = 0;
	timerp[MCFTIMER_PMR] = lastinc = 0;
	}

	ulong get_timer(ulong base)
	{
	unsigned short now, diff;
	volatile unsigned short *timerp;

	timerp = (volatile unsigned short *)(CFG_MBAR + MCFTIMER_BASE4);
	now = timerp[MCFTIMER_PCNTR];
	diff = -(now - lastinc);

	timestamp += diff;
	lastinc = now;
	return timestamp - base;
	}

	void wait_ticks(unsigned long ticks)
	{
	set_timer(0);
	while (get_timer(0) < ticks) ;
	}
	#endif

	#if defined(CONFIG_M5249)
	/*
	* We use timer 1 which is running with a period of 1 us
	*/
	void udelay(unsigned long usec)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE1);
	uint start, now, tmp;

	while (usec > 0) {
	if (usec > 65000)
	tmp = 65000;
	else
	tmp = usec;
	usec = usec - tmp;

	/* Set up TIMER 1 as timebase clock */
	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;
	timerp->timer_tcn = 0;
	/* set period to 1 us */
	/* on m5249 the system clock is (cpu_clk / 2) -> divide by 2000000 */
	timerp->timer_tmr =
	(((CFG_CLK / 2000000) -
	1) << 8) \| MCFTIMER_TMR_CLK1 \| MCFTIMER_TMR_FREERUN \|
	MCFTIMER_TMR_ENABLE;

	start = now = timerp->timer_tcn;
	while (now < start + tmp)
	now = timerp->timer_tcn;
	}
	}

	void mcf_timer_interrupt(void *not_used)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE2);

	/* check for timer 2 interrupts */
	if ((mbar_readLong(MCFSIM_IPR) & 0x00000400) == 0) {
	return;
	}

	/* reset timer */
	timerp->timer_ter = MCFTIMER_TER_CAP \| MCFTIMER_TER_REF;
	timestamp++;
	}

	void timer_init(void)
	{
	volatile timer_t timerp = (timer_t ) (CFG_MBAR + MCFTIMER_BASE2);

	timestamp = 0;

	/* Set up TIMER 2 as clock */
	timerp->timer_tmr = MCFTIMER_TMR_DISABLE;

	/* initialize and enable timer 2 interrupt */
	irq_install_handler(31, mcf_timer_interrupt, 0);
	mbar_writeLong(MCFSIM_IMR, mbar_readLong(MCFSIM_IMR) & ~0x00000400);
	mbar_writeByte(MCFSIM_TIMER2ICR,
	MCFSIM_ICR_AUTOVEC \| MCFSIM_ICR_LEVEL7 \|
	MCFSIM_ICR_PRI3);

	timerp->timer_tcn = 0;
	timerp->timer_trr = 1000; /* Interrupt every ms */
	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
	/* on m5249 the system clock is (cpu_clk / 2) -> divide by 2000000 */
	timerp->timer_tmr =
	(((CFG_CLK / 2000000) -
	1) << 8) \| MCFTIMER_TMR_CLK1 \| MCFTIMER_TMR_RESTART \|
	MCFTIMER_TMR_ENORI \| MCFTIMER_TMR_ENABLE;
	}

	void reset_timer(void)
	{
	timestamp = 0;
	}

	ulong get_timer(ulong base)
	{
	return (timestamp - base);
	}

	void set_timer(ulong t)
	{
	timestamp = t;
	}
	#endif

	#if defined(CONFIG_MCFTMR)
	#ifndef CFG_UDELAY_BASE
	# error "uDelay base not defined!"
	#endif

	#if !defined(CFG_TMR_BASE) \|\| !defined(CFG_INTR_BASE) \|\| !defined(CFG_TMRINTR_NO) \|\| !defined(CFG_TMRINTR_MASK)
	# error "TMR_BASE, INTR_BASE, TMRINTR_NO or TMRINTR_MASk not defined!"
	#endif
	extern void dtimer_intr_setup(void);

	void udelay(unsigned long usec)
	{
	volatile dtmr_t timerp = (dtmr_t ) (CFG_UDELAY_BASE);
	uint start, now, tmp;

	while (usec > 0) {
	if (usec > 65000)
	tmp = 65000;
	else
	tmp = usec;
	usec = usec - tmp;

	/* Set up TIMER 3 as timebase clock */
	timerp->tmr = DTIM_DTMR_RST_RST;
	timerp->tcn = 0;
	/* set period to 1 us */
	timerp->tmr =
	CFG_TIMER_PRESCALER \| DTIM_DTMR_CLK_DIV1 \| DTIM_DTMR_FRR \|
	DTIM_DTMR_RST_EN;

	start = now = timerp->tcn;
	while (now < start + tmp)
	now = timerp->tcn;
	}
	}

	void dtimer_interrupt(void *not_used)
	{
	volatile dtmr_t timerp = (dtmr_t ) (CFG_TMR_BASE);
	volatile int0_t intp = (int0_t ) (CFG_INTR_BASE);

	/* check for timer interrupt asserted */
	if ((intp->iprh0 & CFG_TMRINTR_MASK) == CFG_TMRINTR_MASK) {
	timerp->ter = (DTIM_DTER_CAP \| DTIM_DTER_REF);
	timestamp++;
	return;
	}
	}

	void timer_init(void)
	{
	volatile dtmr_t timerp = (dtmr_t ) (CFG_TMR_BASE);

	timestamp = 0;

	timerp->tcn = 0;
	timerp->trr = 0;

	/* Set up TIMER 4 as clock */
	timerp->tmr = DTIM_DTMR_RST_RST;

	/* initialize and enable timer interrupt */
	irq_install_handler(CFG_TMRINTR_NO, dtimer_interrupt, 0);

	timerp->tcn = 0;
	timerp->trr = 1000; /* Interrupt every ms */

	dtimer_intr_setup();

	/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
	timerp->tmr = CFG_TIMER_PRESCALER \| DTIM_DTMR_CLK_DIV1 \|
	DTIM_DTMR_FRR \| DTIM_DTMR_ORRI \| DTIM_DTMR_RST_EN;
	}

	void reset_timer(void)
	{
	timestamp = 0;
	}

	ulong get_timer(ulong base)
	{
	return (timestamp - base);
	}

	void set_timer(ulong t)
	{
	timestamp = t;
	}
	#endif /* CONFIG_MCFTMR */

	#if defined(CONFIG_MCFPIT)
	#if !defined(CFG_PIT_BASE)
	# error "CFG_PIT_BASE not defined!"
	#endif

	static unsigned short lastinc;

	void udelay(unsigned long usec)
	{
	volatile pit_t timerp = (pit_t ) (CFG_UDELAY_BASE);
	uint tmp;

	while (usec > 0) {
	if (usec > 65000)
	tmp = 65000;
	else
	tmp = usec;
	usec = usec - tmp;

	/* Set up TIMER 3 as timebase clock */
	timerp->pcsr = PIT_PCSR_OVW;
	timerp->pmr = 0;
	/* set period to 1 us */
	timerp->pcsr \|= PIT_PCSR_PRE(CFG_PIT_PRESCALE) \| PIT_PCSR_EN;

	timerp->pmr = tmp;
	while (timerp->pcntr > 0) ;
	}
	}

	void timer_init(void)
	{
	volatile pit_t timerp = (pit_t ) (CFG_PIT_BASE);
	timestamp = 0;

	/* Set up TIMER 4 as poll clock */
	timerp->pcsr = PIT_PCSR_OVW;
	timerp->pmr = lastinc = 0;
	timerp->pcsr \|= PIT_PCSR_PRE(CFG_PIT_PRESCALE) \| PIT_PCSR_EN;
	}

	void set_timer(ulong t)
	{
	volatile pit_t timerp = (pit_t ) (CFG_PIT_BASE);

	timestamp = 0;
	timerp->pmr = lastinc = 0;
	}

	ulong get_timer(ulong base)
	{
	unsigned short now, diff;
	volatile pit_t timerp = (pit_t ) (CFG_PIT_BASE);

	now = timerp->pcntr;
	diff = -(now - lastinc);

	timestamp += diff;
	lastinc = now;
	return timestamp - base;
	}

	void wait_ticks(unsigned long ticks)
	{
	set_timer(0);
	while (get_timer(0) < ticks) ;
	}
	#endif /* CONFIG_MCFPIT */

	/*
	* This function is derived from PowerPC code (read timebase as long long).
	* On M68K it just returns the timer value.
	*/
	unsigned long long get_ticks(void)
	{
	return get_timer(0);
	}

	/*
	* This function is derived from PowerPC code (timebase clock frequency).
	* On M68K it returns the number of timer ticks per second.
	*/
	ulong get_tbclk(void)
	{
	ulong tbclk;
	tbclk = CFG_HZ;
	return tbclk;
	}