cpu/ppc4xx/interrupts.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2000-2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2002 (440 port)
  * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
  *
  * (C) Copyright 2003 (440GX port)
  * Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com
  *
  * 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 <watchdog.h>
 #include <command.h>
 #include <asm/processor.h>
 #include <ppc4xx.h>
 #include <ppc_asm.tmpl>
 #include <commproc.h>
 #include <asm/ppc4xx-intvec.h>

 DECLARE_GLOBAL_DATA_PTR;

 /*
  * Define the number of UIC's
  */
 #if defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT)
 #define UIC_MAX		4
 #elif defined(CONFIG_440GX) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_405EX)
 #define UIC_MAX		3
 #elif defined(CONFIG_440GP) || defined(CONFIG_440SP) || \
     defined(CONFIG_440EP) || defined(CONFIG_440GR)
 #define UIC_MAX		2
 #else
 #define UIC_MAX		1
 #endif

 /*
  * CPM interrupt vector functions.
  */
 struct	irq_action {
 	interrupt_handler_t *handler;
 	void *arg;
 	int count;
 };

 static struct irq_action irq_vecs[UIC_MAX * 32];

 u32 get_dcr(u16);
 void set_dcr(u16, u32);

 #if (UIC_MAX > 1) && !defined(CONFIG_440GX)
 static void uic_cascade_interrupt(void *para);
 #endif

 #if defined(CONFIG_440)

 /* SPRN changed in 440 */
 static __inline__ void set_evpr(unsigned long val)
 {
 	asm volatile("mtspr 0x03f,%0" : : "r" (val));
 }

 #else /* !defined(CONFIG_440) */

 static __inline__ void set_pit(unsigned long val)
 {
 	asm volatile("mtpit %0" : : "r" (val));
 }


 static __inline__ void set_tcr(unsigned long val)
 {
 	asm volatile("mttcr %0" : : "r" (val));
 }


 static __inline__ void set_evpr(unsigned long val)
 {
 	asm volatile("mtevpr %0" : : "r" (val));
 }
 #endif /* defined(CONFIG_440 */

 int interrupt_init_cpu (unsigned *decrementer_count)
 {
 	int vec;
 	unsigned long val;

 	/* decrementer is automatically reloaded */
 	*decrementer_count = 0;

 	/*
 	 * Mark all irqs as free
 	 */
 	for (vec = 0; vec < (UIC_MAX * 32); vec++) {
 		irq_vecs[vec].handler = NULL;
 		irq_vecs[vec].arg = NULL;
 		irq_vecs[vec].count = 0;
 	}

 #ifdef CONFIG_4xx
 	/*
 	 * Init PIT
 	 */
 #if defined(CONFIG_440)
 	val = mfspr( tcr );
 	val &= (~0x04400000);		/* clear DIS & ARE */
 	mtspr( tcr, val );
 	mtspr( dec, 0 );		/* Prevent exception after TSR clear*/
 	mtspr( decar, 0 );		/* clear reload */
 	mtspr( tsr, 0x08000000 );	/* clear DEC status */
 	val = gd->bd->bi_intfreq/1000;	/* 1 msec */
 	mtspr( decar, val );		/* Set auto-reload value */
 	mtspr( dec, val );		/* Set inital val */
 #else
 	set_pit(gd->bd->bi_intfreq / 1000);
 #endif
 #endif  /* CONFIG_4xx */

 #ifdef CONFIG_ADCIOP
 	/*
 	 * Init PIT
 	 */
 	set_pit(66000);
 #endif

 	/*
 	 * Enable PIT
 	 */
 	val = mfspr(tcr);
 	val |= 0x04400000;
 	mtspr(tcr, val);

 	/*
 	 * Set EVPR to 0
 	 */
 	set_evpr(0x00000000);

 #if !defined(CONFIG_440GX)
 #if (UIC_MAX > 1)
 	/* Install the UIC1 handlers */
 	irq_install_handler(VECNUM_UIC1NC, uic_cascade_interrupt, 0);
 	irq_install_handler(VECNUM_UIC1C, uic_cascade_interrupt, 0);
 #endif
 #if (UIC_MAX > 2)
 	irq_install_handler(VECNUM_UIC2NC, uic_cascade_interrupt, 0);
 	irq_install_handler(VECNUM_UIC2C, uic_cascade_interrupt, 0);
 #endif
 #if (UIC_MAX > 3)
 	irq_install_handler(VECNUM_UIC3NC, uic_cascade_interrupt, 0);
 	irq_install_handler(VECNUM_UIC3C, uic_cascade_interrupt, 0);
 #endif
 #else /* !defined(CONFIG_440GX) */
 	/* Take the GX out of compatibility mode
 	 * Travis Sawyer, 9 Mar 2004
 	 * NOTE: 440gx user manual inconsistency here
 	 *       Compatibility mode and Ethernet Clock select are not
 	 *       correct in the manual
 	 */
 	mfsdr(sdr_mfr, val);
 	val &= ~0x10000000;
 	mtsdr(sdr_mfr,val);

 	/* Enable UIC interrupts via UIC Base Enable Register */
 	mtdcr(uicb0sr, UICB0_ALL);
 	mtdcr(uicb0er, 0x54000000);
 	/* None are critical */
 	mtdcr(uicb0cr, 0);
 #endif /* !defined(CONFIG_440GX) */

 	return (0);
 }

 /* Handler for UIC interrupt */
 static void uic_interrupt(u32 uic_base, int vec_base)
 {
 	u32 uic_msr;
 	u32 msr_shift;
 	int vec;

 	/*
 	 * Read masked interrupt status register to determine interrupt source
 	 */
 	uic_msr = get_dcr(uic_base + UIC_MSR);
 	msr_shift = uic_msr;
 	vec = vec_base;

 	while (msr_shift != 0) {
 		if (msr_shift & 0x80000000) {
 			/*
 			 * Increment irq counter (for debug purpose only)
 			 */
 			irq_vecs[vec].count++;

 			if (irq_vecs[vec].handler != NULL) {
 				/* call isr */
 				(*irq_vecs[vec].handler)(irq_vecs[vec].arg);
 			} else {
 				set_dcr(uic_base + UIC_ER,
 					get_dcr(uic_base + UIC_ER) &
 					~(0x80000000 >> (vec & 0x1f)));
 				printf("Masking bogus interrupt vector %d"
 				       " (UIC_BASE=0x%x)\n", vec, uic_base);
 			}

 			/*
 			 * After servicing the interrupt, we have to remove the
 			 * status indicator
 			 */
 			set_dcr(uic_base + UIC_SR, (0x80000000 >> (vec & 0x1f)));
 		}

 		/*
 		 * Shift msr to next position and increment vector
 		 */
 		msr_shift <<= 1;
 		vec++;
 	}
 }

 #if (UIC_MAX > 1) && !defined(CONFIG_440GX)
 static void uic_cascade_interrupt(void *para)
 {
 	external_interrupt(para);
 }
 #endif

 #if defined(CONFIG_440)
 #if defined(CONFIG_440GX)
 /* 440GX uses base uic register */
 #define UIC_BMSR	uicb0msr
 #define UIC_BSR		uicb0sr
 #else
 #define UIC_BMSR	uic0msr
 #define UIC_BSR		uic0sr
 #endif
 #else /* CONFIG_440 */
 #define UIC_BMSR	uicmsr
 #define UIC_BSR		uicsr
 #endif /* CONFIG_440 */

 /*
  * Handle external interrupts
  */
 void external_interrupt(struct pt_regs *regs)
 {
 	u32 uic_msr;

 	/*
 	 * Read masked interrupt status register to determine interrupt source
 	 */
 	uic_msr = mfdcr(UIC_BMSR);

 #if (UIC_MAX > 1)
 	if ((UICB0_UIC1CI & uic_msr) || (UICB0_UIC1NCI & uic_msr))
 		uic_interrupt(UIC1_DCR_BASE, 32);
 #endif

 #if (UIC_MAX > 2)
 	if ((UICB0_UIC2CI & uic_msr) || (UICB0_UIC2NCI & uic_msr))
 		uic_interrupt(UIC2_DCR_BASE, 64);
 #endif

 #if (UIC_MAX > 3)
 	if ((UICB0_UIC3CI & uic_msr) || (UICB0_UIC3NCI & uic_msr))
 		uic_interrupt(UIC3_DCR_BASE, 96);
 #endif

 #if defined(CONFIG_440)
 #if !defined(CONFIG_440GX)
 	if (uic_msr & ~(UICB0_ALL))
 		uic_interrupt(UIC0_DCR_BASE, 0);
 #else
 	if ((UICB0_UIC0CI & uic_msr) || (UICB0_UIC0NCI & uic_msr))
 		uic_interrupt(UIC0_DCR_BASE, 0);
 #endif
 #else /* CONFIG_440 */
 	uic_interrupt(UIC0_DCR_BASE, 0);
 #endif /* CONFIG_440 */

 	mtdcr(UIC_BSR, uic_msr);

 	return;
 }

 /*
  * Install and free a interrupt handler.
  */
 void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
 {
 	int i;

 	/*
 	 * Print warning when replacing with a different irq vector
 	 */
 	if ((irq_vecs[vec].handler != NULL) && (irq_vecs[vec].handler != handler)) {
 		printf("Interrupt vector %d: handler 0x%x replacing 0x%x\n",
 		       vec, (uint) handler, (uint) irq_vecs[vec].handler);
 	}
 	irq_vecs[vec].handler = handler;
 	irq_vecs[vec].arg = arg;

 	i = vec & 0x1f;
 	if ((vec >= 0) && (vec < 32))
 		mtdcr(uicer, mfdcr(uicer) | (0x80000000 >> i));
 #if (UIC_MAX > 1)
 	else if ((vec >= 32) && (vec < 64))
 		mtdcr(uic1er, mfdcr(uic1er) | (0x80000000 >> i));
 #endif
 #if (UIC_MAX > 2)
 	else if ((vec >= 64) && (vec < 96))
 		mtdcr(uic2er, mfdcr(uic2er) | (0x80000000 >> i));
 #endif
 #if (UIC_MAX > 3)
 	else if (vec >= 96)
 		mtdcr(uic3er, mfdcr(uic3er) | (0x80000000 >> i));
 #endif

 	debug("Install interrupt for vector %d ==> %p\n", vec, handler);
 }

 void irq_free_handler (int vec)
 {
 	int i;

 	debug("Free interrupt for vector %d ==> %p\n",
 	      vec, irq_vecs[vec].handler);

 	i = vec & 0x1f;
 	if ((vec >= 0) && (vec < 32))
 		mtdcr(uicer, mfdcr(uicer) & ~(0x80000000 >> i));
 #if (UIC_MAX > 1)
 	else if ((vec >= 32) && (vec < 64))
 		mtdcr(uic1er, mfdcr(uic1er) & ~(0x80000000 >> i));
 #endif
 #if (UIC_MAX > 2)
 	else if ((vec >= 64) && (vec < 96))
 		mtdcr(uic2er, mfdcr(uic2er) & ~(0x80000000 >> i));
 #endif
 #if (UIC_MAX > 3)
 	else if (vec >= 96)
 		mtdcr(uic3er, mfdcr(uic3er) & ~(0x80000000 >> i));
 #endif

 	irq_vecs[vec].handler = NULL;
 	irq_vecs[vec].arg = NULL;
 }

 void timer_interrupt_cpu (struct pt_regs *regs)
 {
 	/* nothing to do here */
 	return;
 }

 #if defined(CONFIG_CMD_IRQ)
 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	int vec;

 	printf ("Interrupt-Information:\n");
 	printf ("Nr  Routine   Arg       Count\n");

 	for (vec = 0; vec < (UIC_MAX * 32); vec++) {
 		if (irq_vecs[vec].handler != NULL) {
 			printf ("%02d  %08lx  %08lx  %d\n",
 				vec,
 				(ulong)irq_vecs[vec].handler,
 				(ulong)irq_vecs[vec].arg,
 				irq_vecs[vec].count);
 		}
 	}

 	return 0;
 }
 #endif
	/*
	* (C) Copyright 2000-2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* (C) Copyright 2002 (440 port)
	* Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
	*
	* (C) Copyright 2003 (440GX port)
	* Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com
	*
	* 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 <watchdog.h>
	#include <command.h>
	#include <asm/processor.h>
	#include <ppc4xx.h>
	#include <ppc_asm.tmpl>
	#include <commproc.h>
	#include <asm/ppc4xx-intvec.h>

	DECLARE_GLOBAL_DATA_PTR;

	/*
	* Define the number of UIC's
	*/
	#if defined(CONFIG_440SPE) \|\| \
	defined(CONFIG_460EX) \|\| defined(CONFIG_460GT)
	#define UIC_MAX 4
	#elif defined(CONFIG_440GX) \|\| \
	defined(CONFIG_440EPX) \|\| defined(CONFIG_440GRX) \|\| \
	defined(CONFIG_405EX)
	#define UIC_MAX 3
	#elif defined(CONFIG_440GP) \|\| defined(CONFIG_440SP) \|\| \
	defined(CONFIG_440EP) \|\| defined(CONFIG_440GR)
	#define UIC_MAX 2
	#else
	#define UIC_MAX 1
	#endif

	/*
	* CPM interrupt vector functions.
	*/
	struct irq_action {
	interrupt_handler_t *handler;
	void *arg;
	int count;
	};

	static struct irq_action irq_vecs[UIC_MAX * 32];

	u32 get_dcr(u16);
	void set_dcr(u16, u32);

	#if (UIC_MAX > 1) && !defined(CONFIG_440GX)
	static void uic_cascade_interrupt(void *para);
	#endif

	#if defined(CONFIG_440)

	/* SPRN changed in 440 */
	static __inline__ void set_evpr(unsigned long val)
	{
	asm volatile("mtspr 0x03f,%0" : : "r" (val));
	}

	#else /* !defined(CONFIG_440) */

	static __inline__ void set_pit(unsigned long val)
	{
	asm volatile("mtpit %0" : : "r" (val));
	}


	static __inline__ void set_tcr(unsigned long val)
	{
	asm volatile("mttcr %0" : : "r" (val));
	}


	static __inline__ void set_evpr(unsigned long val)
	{
	asm volatile("mtevpr %0" : : "r" (val));
	}
	#endif /* defined(CONFIG_440 */

	int interrupt_init_cpu (unsigned *decrementer_count)
	{
	int vec;
	unsigned long val;

	/* decrementer is automatically reloaded */
	*decrementer_count = 0;

	/*
	* Mark all irqs as free
	*/
	for (vec = 0; vec < (UIC_MAX * 32); vec++) {
	irq_vecs[vec].handler = NULL;
	irq_vecs[vec].arg = NULL;
	irq_vecs[vec].count = 0;
	}

	#ifdef CONFIG_4xx
	/*
	* Init PIT
	*/
	#if defined(CONFIG_440)
	val = mfspr( tcr );
	val &= (~0x04400000); /* clear DIS & ARE */
	mtspr( tcr, val );
	mtspr( dec, 0 ); /* Prevent exception after TSR clear*/
	mtspr( decar, 0 ); /* clear reload */
	mtspr( tsr, 0x08000000 ); /* clear DEC status */
	val = gd->bd->bi_intfreq/1000; /* 1 msec */
	mtspr( decar, val ); /* Set auto-reload value */
	mtspr( dec, val ); /* Set inital val */
	#else
	set_pit(gd->bd->bi_intfreq / 1000);
	#endif
	#endif /* CONFIG_4xx */

	#ifdef CONFIG_ADCIOP
	/*
	* Init PIT
	*/
	set_pit(66000);
	#endif

	/*
	* Enable PIT
	*/
	val = mfspr(tcr);
	val \|= 0x04400000;
	mtspr(tcr, val);

	/*
	* Set EVPR to 0
	*/
	set_evpr(0x00000000);

	#if !defined(CONFIG_440GX)
	#if (UIC_MAX > 1)
	/* Install the UIC1 handlers */
	irq_install_handler(VECNUM_UIC1NC, uic_cascade_interrupt, 0);
	irq_install_handler(VECNUM_UIC1C, uic_cascade_interrupt, 0);
	#endif
	#if (UIC_MAX > 2)
	irq_install_handler(VECNUM_UIC2NC, uic_cascade_interrupt, 0);
	irq_install_handler(VECNUM_UIC2C, uic_cascade_interrupt, 0);
	#endif
	#if (UIC_MAX > 3)
	irq_install_handler(VECNUM_UIC3NC, uic_cascade_interrupt, 0);
	irq_install_handler(VECNUM_UIC3C, uic_cascade_interrupt, 0);
	#endif
	#else /* !defined(CONFIG_440GX) */
	/* Take the GX out of compatibility mode
	* Travis Sawyer, 9 Mar 2004
	* NOTE: 440gx user manual inconsistency here
	* Compatibility mode and Ethernet Clock select are not
	* correct in the manual
	*/
	mfsdr(sdr_mfr, val);
	val &= ~0x10000000;
	mtsdr(sdr_mfr,val);

	/* Enable UIC interrupts via UIC Base Enable Register */
	mtdcr(uicb0sr, UICB0_ALL);
	mtdcr(uicb0er, 0x54000000);
	/* None are critical */
	mtdcr(uicb0cr, 0);
	#endif /* !defined(CONFIG_440GX) */

	return (0);
	}

	/* Handler for UIC interrupt */
	static void uic_interrupt(u32 uic_base, int vec_base)
	{
	u32 uic_msr;
	u32 msr_shift;
	int vec;

	/*
	* Read masked interrupt status register to determine interrupt source
	*/
	uic_msr = get_dcr(uic_base + UIC_MSR);
	msr_shift = uic_msr;
	vec = vec_base;

	while (msr_shift != 0) {
	if (msr_shift & 0x80000000) {
	/*
	* Increment irq counter (for debug purpose only)
	*/
	irq_vecs[vec].count++;

	if (irq_vecs[vec].handler != NULL) {
	/* call isr */
	(*irq_vecs[vec].handler)(irq_vecs[vec].arg);
	} else {
	set_dcr(uic_base + UIC_ER,
	get_dcr(uic_base + UIC_ER) &
	~(0x80000000 >> (vec & 0x1f)));
	printf("Masking bogus interrupt vector %d"
	" (UIC_BASE=0x%x)\n", vec, uic_base);
	}

	/*
	* After servicing the interrupt, we have to remove the
	* status indicator
	*/
	set_dcr(uic_base + UIC_SR, (0x80000000 >> (vec & 0x1f)));
	}

	/*
	* Shift msr to next position and increment vector
	*/
	msr_shift <<= 1;
	vec++;
	}
	}

	#if (UIC_MAX > 1) && !defined(CONFIG_440GX)
	static void uic_cascade_interrupt(void *para)
	{
	external_interrupt(para);
	}
	#endif

	#if defined(CONFIG_440)
	#if defined(CONFIG_440GX)
	/* 440GX uses base uic register */
	#define UIC_BMSR uicb0msr
	#define UIC_BSR uicb0sr
	#else
	#define UIC_BMSR uic0msr
	#define UIC_BSR uic0sr
	#endif
	#else /* CONFIG_440 */
	#define UIC_BMSR uicmsr
	#define UIC_BSR uicsr
	#endif /* CONFIG_440 */

	/*
	* Handle external interrupts
	*/
	void external_interrupt(struct pt_regs *regs)
	{
	u32 uic_msr;

	/*
	* Read masked interrupt status register to determine interrupt source
	*/
	uic_msr = mfdcr(UIC_BMSR);

	#if (UIC_MAX > 1)
	if ((UICB0_UIC1CI & uic_msr) \|\| (UICB0_UIC1NCI & uic_msr))
	uic_interrupt(UIC1_DCR_BASE, 32);
	#endif

	#if (UIC_MAX > 2)
	if ((UICB0_UIC2CI & uic_msr) \|\| (UICB0_UIC2NCI & uic_msr))
	uic_interrupt(UIC2_DCR_BASE, 64);
	#endif

	#if (UIC_MAX > 3)
	if ((UICB0_UIC3CI & uic_msr) \|\| (UICB0_UIC3NCI & uic_msr))
	uic_interrupt(UIC3_DCR_BASE, 96);
	#endif

	#if defined(CONFIG_440)
	#if !defined(CONFIG_440GX)
	if (uic_msr & ~(UICB0_ALL))
	uic_interrupt(UIC0_DCR_BASE, 0);
	#else
	if ((UICB0_UIC0CI & uic_msr) \|\| (UICB0_UIC0NCI & uic_msr))
	uic_interrupt(UIC0_DCR_BASE, 0);
	#endif
	#else /* CONFIG_440 */
	uic_interrupt(UIC0_DCR_BASE, 0);
	#endif /* CONFIG_440 */

	mtdcr(UIC_BSR, uic_msr);

	return;
	}

	/*
	* Install and free a interrupt handler.
	*/
	void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg)
	{
	int i;

	/*
	* Print warning when replacing with a different irq vector
	*/
	if ((irq_vecs[vec].handler != NULL) && (irq_vecs[vec].handler != handler)) {
	printf("Interrupt vector %d: handler 0x%x replacing 0x%x\n",
	vec, (uint) handler, (uint) irq_vecs[vec].handler);
	}
	irq_vecs[vec].handler = handler;
	irq_vecs[vec].arg = arg;

	i = vec & 0x1f;
	if ((vec >= 0) && (vec < 32))
	mtdcr(uicer, mfdcr(uicer) \| (0x80000000 >> i));
	#if (UIC_MAX > 1)
	else if ((vec >= 32) && (vec < 64))
	mtdcr(uic1er, mfdcr(uic1er) \| (0x80000000 >> i));
	#endif
	#if (UIC_MAX > 2)
	else if ((vec >= 64) && (vec < 96))
	mtdcr(uic2er, mfdcr(uic2er) \| (0x80000000 >> i));
	#endif
	#if (UIC_MAX > 3)
	else if (vec >= 96)
	mtdcr(uic3er, mfdcr(uic3er) \| (0x80000000 >> i));
	#endif

	debug("Install interrupt for vector %d ==> %p\n", vec, handler);
	}

	void irq_free_handler (int vec)
	{
	int i;

	debug("Free interrupt for vector %d ==> %p\n",
	vec, irq_vecs[vec].handler);

	i = vec & 0x1f;
	if ((vec >= 0) && (vec < 32))
	mtdcr(uicer, mfdcr(uicer) & ~(0x80000000 >> i));
	#if (UIC_MAX > 1)
	else if ((vec >= 32) && (vec < 64))
	mtdcr(uic1er, mfdcr(uic1er) & ~(0x80000000 >> i));
	#endif
	#if (UIC_MAX > 2)
	else if ((vec >= 64) && (vec < 96))
	mtdcr(uic2er, mfdcr(uic2er) & ~(0x80000000 >> i));
	#endif
	#if (UIC_MAX > 3)
	else if (vec >= 96)
	mtdcr(uic3er, mfdcr(uic3er) & ~(0x80000000 >> i));
	#endif

	irq_vecs[vec].handler = NULL;
	irq_vecs[vec].arg = NULL;
	}

	void timer_interrupt_cpu (struct pt_regs *regs)
	{
	/* nothing to do here */
	return;
	}

	#if defined(CONFIG_CMD_IRQ)
	int do_irqinfo(cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	{
	int vec;

	printf ("Interrupt-Information:\n");
	printf ("Nr Routine Arg Count\n");

	for (vec = 0; vec < (UIC_MAX * 32); vec++) {
	if (irq_vecs[vec].handler != NULL) {
	printf ("%02d %08lx %08lx %d\n",
	vec,
	(ulong)irq_vecs[vec].handler,
	(ulong)irq_vecs[vec].arg,
	irq_vecs[vec].count);
	}
	}

	return 0;
	}
	#endif