[people/ms/u-boot.git] / cpu / microblaze / interrupts.c

/*
 * (C) Copyright 2007 Michal Simek
 * (C) Copyright 2004 Atmark Techno, Inc.
 *
 * Michal  SIMEK <monstr@monstr.eu>
 * Yasushi SHOJI <yashi@atmark-techno.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 <command.h>
#include <asm/microblaze_intc.h>
#include <asm/asm.h>

#undef DEBUG_INT

extern void microblaze_disable_interrupts (void);
extern void microblaze_enable_interrupts (void);

void enable_interrupts (void)
{
	__asm__ __volatile__ ("msrset r0, 0x2");
}

int disable_interrupts (void)
{
	__asm__ __volatile__ ("msrclr r0, 0x2");
	return 0;
}

#ifdef CFG_INTC_0
#ifdef CFG_TIMER_0
extern void timer_init (void);
#endif
#ifdef CFG_FSL_2
extern void fsl_init2 (void);
#endif


static struct irq_action vecs[CFG_INTC_0_NUM];

/* mapping structure to interrupt controller */
microblaze_intc_t *intc = (microblaze_intc_t *) (CFG_INTC_0_ADDR);

/* default handler */
void def_hdlr (void)
{
	puts ("def_hdlr\n");
}

void enable_one_interrupt (int irq)
{
	int mask;
	int offset = 1;
	offset <<= irq;
	mask = intc->ier;
	intc->ier = (mask | offset);
#ifdef DEBUG_INT
	printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
		intc->ier);
	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
		intc->iar, intc->mer);
#endif
}

void disable_one_interrupt (int irq)
{
	int mask;
	int offset = 1;
	offset <<= irq;
	mask = intc->ier;
	intc->ier = (mask & ~offset);
#ifdef DEBUG_INT
	printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
		intc->ier);
	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
		intc->iar, intc->mer);
#endif
}

/* adding new handler for interrupt */
void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
{
	struct irq_action *act;
	/* irq out of range */
	if ((irq < 0) || (irq > CFG_INTC_0_NUM)) {
		puts ("IRQ out of range\n");
		return;
	}
	act = &vecs[irq];
	if (hdlr) {		/* enable */
		act->handler = hdlr;
		act->arg = arg;
		act->count = 0;
		enable_one_interrupt (irq);
	} else {		/* disable */
		act->handler = (interrupt_handler_t *) def_hdlr;
		act->arg = (void *)irq;
		disable_one_interrupt (irq);
	}
}

/* initialization interrupt controller - hardware */
void intc_init (void)
{
	intc->mer = 0;
	intc->ier = 0;
	intc->iar = 0xFFFFFFFF;
	/* XIntc_Start - hw_interrupt enable and all interrupt enable */
	intc->mer = 0x3;
#ifdef DEBUG_INT
	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
		intc->iar, intc->mer);
#endif
}

int interrupts_init (void)
{
	int i;
	/* initialize irq list */
	for (i = 0; i < CFG_INTC_0_NUM; i++) {
		vecs[i].handler = (interrupt_handler_t *) def_hdlr;
		vecs[i].arg = (void *)i;
		vecs[i].count = 0;
	}
	/* initialize intc controller */
	intc_init ();
#ifdef CFG_TIMER_0
	timer_init ();
#endif
#ifdef CFG_FSL_2
	fsl_init2 ();
#endif
	enable_interrupts ();
	return 0;
}

void interrupt_handler (void)
{
	int irqs = (intc->isr & intc->ier);	/* find active interrupt */
	int i = 1;
#ifdef DEBUG_INT
	int value;
	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
		intc->iar, intc->mer);
	R14(value);
	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
#endif
	struct irq_action *act = vecs;
	while (irqs) {
		if (irqs & 1) {
#ifdef DEBUG_INT
			printf
			    ("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
			     act->handler, act->count, act->arg);
#endif
			act->handler (act->arg);
			act->count++;
			intc->iar = i;
			return;
		}
		irqs >>= 1;
		act++;
		i <<= 1;
	}

#ifdef DEBUG_INT
	printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
		intc->ier, intc->iar, intc->mer);
	R14(value);
	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
#endif
}
#endif

#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
#ifdef CFG_INTC_0
int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	int i;
	struct irq_action *act = vecs;

	puts ("\nInterrupt-Information:\n\n"
	      "Nr  Routine   Arg       Count\n"
	      "-----------------------------\n");

	for (i = 0; i < CFG_INTC_0_NUM; i++) {
		if (act->handler != (interrupt_handler_t*) def_hdlr) {
			printf ("%02d  %08lx  %08lx  %d\n", i,
				(int)act->handler, (int)act->arg, act->count);
		}
		act++;
	}
	puts ("\n");
	return (0);
}
#else
int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	puts ("Undefined interrupt controller\n");
}
#endif
#endif				/* CONFIG_COMMANDS & CFG_CMD_IRQ */
Commit	Line	Data
507bbe3e	1	/*
cfc67116	2	* (C) Copyright 2007 Michal Simek
507bbe3e WD	3	* (C) Copyright 2004 Atmark Techno, Inc.
507bbe3e WD	4	*
cfc67116	5	* Michal SIMEK <monstr@monstr.eu>
507bbe3e WD	6	* Yasushi SHOJI <yashi@atmark-techno.com>
	7	*
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of
	14	* the License, or (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
cfc67116	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
507bbe3e WD	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	* MA 02111-1307 USA
	25	*/
	26
cfc67116 MS	27	#include <common.h>
	28	#include <command.h>
	29	#include <asm/microblaze_intc.h>
42efed61	30	#include <asm/asm.h>
cfc67116 MS	31
	32	#undef DEBUG_INT
	33
	34	extern void microblaze_disable_interrupts (void);
	35	extern void microblaze_enable_interrupts (void);
	36
	37	void enable_interrupts (void)
507bbe3e	38	{
fb7c2dbe	39	__asm__ __volatile__ ("msrset r0, 0x2");
507bbe3e WD	40	}
507bbe3e WD	41
cfc67116	42	int disable_interrupts (void)
507bbe3e	43	{
fb7c2dbe	44	__asm__ __volatile__ ("msrclr r0, 0x2");
507bbe3e WD	45	return 0;
507bbe3e WD	46	}
cfc67116 MS	47
	48	#ifdef CFG_INTC_0
	49	#ifdef CFG_TIMER_0
	50	extern void timer_init (void);
	51	#endif
fb7c2dbe MS	52	#ifdef CFG_FSL_2
	53	extern void fsl_init2 (void);
	54	#endif
	55
cfc67116 MS	56
	57	static struct irq_action vecs[CFG_INTC_0_NUM];
	58
	59	/* mapping structure to interrupt controller */
	60	microblaze_intc_t intc = (microblaze_intc_t ) (CFG_INTC_0_ADDR);
	61
	62	/* default handler */
	63	void def_hdlr (void)
	64	{
	65	puts ("def_hdlr\n");
	66	}
	67
	68	void enable_one_interrupt (int irq)
	69	{
	70	int mask;
	71	int offset = 1;
	72	offset <<= irq;
	73	mask = intc->ier;
	74	intc->ier = (mask \| offset);
	75	#ifdef DEBUG_INT
	76	printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
	77	intc->ier);
	78	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
	79	intc->iar, intc->mer);
	80	#endif
	81	}
	82
	83	void disable_one_interrupt (int irq)
	84	{
	85	int mask;
	86	int offset = 1;
	87	offset <<= irq;
	88	mask = intc->ier;
	89	intc->ier = (mask & ~offset);
	90	#ifdef DEBUG_INT
	91	printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
	92	intc->ier);
	93	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
	94	intc->iar, intc->mer);
	95	#endif
	96	}
	97
	98	/* adding new handler for interrupt */
	99	void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
	100	{
	101	struct irq_action *act;
	102	/* irq out of range */
17980495	103	if ((irq < 0) \|\| (irq > CFG_INTC_0_NUM)) {
cfc67116 MS	104	puts ("IRQ out of range\n");
	105	return;
	106	}
	107	act = &vecs[irq];
	108	if (hdlr) { /* enable */
	109	act->handler = hdlr;
	110	act->arg = arg;
	111	act->count = 0;
	112	enable_one_interrupt (irq);
	113	} else { /* disable */
cfc67116 MS	114	act->handler = (interrupt_handler_t *) def_hdlr;
	115	act->arg = (void *)irq;
	116	disable_one_interrupt (irq);
	117	}
	118	}
	119
	120	/* initialization interrupt controller - hardware */
	121	void intc_init (void)
	122	{
	123	intc->mer = 0;
	124	intc->ier = 0;
	125	intc->iar = 0xFFFFFFFF;
	126	/* XIntc_Start - hw_interrupt enable and all interrupt enable */
	127	intc->mer = 0x3;
	128	#ifdef DEBUG_INT
	129	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
	130	intc->iar, intc->mer);
	131	#endif
	132	}
	133
	134	int interrupts_init (void)
	135	{
	136	int i;
	137	/* initialize irq list */
17980495	138	for (i = 0; i < CFG_INTC_0_NUM; i++) {
cfc67116 MS	139	vecs[i].handler = (interrupt_handler_t *) def_hdlr;
	140	vecs[i].arg = (void *)i;
	141	vecs[i].count = 0;
	142	}
	143	/* initialize intc controller */
	144	intc_init ();
	145	#ifdef CFG_TIMER_0
	146	timer_init ();
fb7c2dbe MS	147	#endif
	148	#ifdef CFG_FSL_2
	149	fsl_init2 ();
cfc67116 MS	150	#endif
	151	enable_interrupts ();
	152	return 0;
	153	}
	154
	155	void interrupt_handler (void)
	156	{
42efed61 MS	157	int irqs = (intc->isr & intc->ier); /* find active interrupt */
42efed61 MS	158	int i = 1;
cfc67116	159	#ifdef DEBUG_INT
42efed61	160	int value;
cfc67116 MS	161	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
cfc67116 MS	162	intc->iar, intc->mer);
42efed61	163	R14(value);
cfc67116 MS	164	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
	165	#endif
	166	struct irq_action *act = vecs;
	167	while (irqs) {
	168	if (irqs & 1) {
	169	#ifdef DEBUG_INT
	170	printf
	171	("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
	172	act->handler, act->count, act->arg);
	173	#endif
	174	act->handler (act->arg);
	175	act->count++;
42efed61 MS	176	intc->iar = i;
42efed61 MS	177	return;
cfc67116 MS	178	}
	179	irqs >>= 1;
	180	act++;
42efed61	181	i <<= 1;
cfc67116	182	}
42efed61 MS	183
42efed61 MS	184	#ifdef DEBUG_INT
cfc67116 MS	185	printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
cfc67116 MS	186	intc->ier, intc->iar, intc->mer);
42efed61 MS	187	R14(value);
42efed61 MS	188	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
cfc67116 MS	189	#endif
	190	}
	191	#endif
	192
	193	#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
	194	#ifdef CFG_INTC_0
	195	int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
	196	{
	197	int i;
	198	struct irq_action *act = vecs;
	199
	200	puts ("\nInterrupt-Information:\n\n"
	201	"Nr Routine Arg Count\n"
	202	"-----------------------------\n");
	203
17980495	204	for (i = 0; i < CFG_INTC_0_NUM; i++) {
cfc67116 MS	205	if (act->handler != (interrupt_handler_t*) def_hdlr) {
	206	printf ("%02d %08lx %08lx %d\n", i,
	207	(int)act->handler, (int)act->arg, act->count);
	208	}
	209	act++;
	210	}
	211	puts ("\n");
	212	return (0);
	213	}
	214	#else
	215	int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
	216	{
	217	puts ("Undefined interrupt controller\n");
	218	}
	219	#endif
	220	#endif /* CONFIG_COMMANDS & CFG_CMD_IRQ */