[deliverable/linux.git] / arch / sparc / kernel / sun4m_irq.c

/*
 * sun4m irq support
 *
 *  djhr: Hacked out of irq.c into a CPU dependent version.
 *
 *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 *  Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
 *  Copyright (C) 1995 Pete A. Zaitcev (zaitcev@yahoo.com)
 *  Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
 */

#include <linux/slab.h>

#include <asm/timer.h>
#include <asm/traps.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/cacheflush.h>

#include "irq.h"
#include "kernel.h"

/* Sample sun4m IRQ layout:
 *
 * 0x22 - Power
 * 0x24 - ESP SCSI
 * 0x26 - Lance ethernet
 * 0x2b - Floppy
 * 0x2c - Zilog uart
 * 0x32 - SBUS level 0
 * 0x33 - Parallel port, SBUS level 1
 * 0x35 - SBUS level 2
 * 0x37 - SBUS level 3
 * 0x39 - Audio, Graphics card, SBUS level 4
 * 0x3b - SBUS level 5
 * 0x3d - SBUS level 6
 *
 * Each interrupt source has a mask bit in the interrupt registers.
 * When the mask bit is set, this blocks interrupt deliver.  So you
 * clear the bit to enable the interrupt.
 *
 * Interrupts numbered less than 0x10 are software triggered interrupts
 * and unused by Linux.
 *
 * Interrupt level assignment on sun4m:
 *
 *	level		source
 * ------------------------------------------------------------
 *	  1		softint-1
 *	  2		softint-2, VME/SBUS level 1
 *	  3		softint-3, VME/SBUS level 2
 *	  4		softint-4, onboard SCSI
 *	  5		softint-5, VME/SBUS level 3
 *	  6		softint-6, onboard ETHERNET
 *	  7		softint-7, VME/SBUS level 4
 *	  8		softint-8, onboard VIDEO
 *	  9		softint-9, VME/SBUS level 5, Module Interrupt
 *	 10		softint-10, system counter/timer
 *	 11		softint-11, VME/SBUS level 6, Floppy
 *	 12		softint-12, Keyboard/Mouse, Serial
 *	 13		softint-13, VME/SBUS level 7, ISDN Audio
 *	 14		softint-14, per-processor counter/timer
 *	 15		softint-15, Asynchronous Errors (broadcast)
 *
 * Each interrupt source is masked distinctly in the sun4m interrupt
 * registers.  The PIL level alone is therefore ambiguous, since multiple
 * interrupt sources map to a single PIL.
 *
 * This ambiguity is resolved in the 'intr' property for device nodes
 * in the OF device tree.  Each 'intr' property entry is composed of
 * two 32-bit words.  The first word is the IRQ priority value, which
 * is what we're intersted in.  The second word is the IRQ vector, which
 * is unused.
 *
 * The low 4 bits of the IRQ priority indicate the PIL, and the upper
 * 4 bits indicate onboard vs. SBUS leveled vs. VME leveled.  0x20
 * means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
 *
 * For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
 * whereas a value of 0x33 is SBUS level 2.  Here are some sample
 * 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
 * Tadpole S3 GX systems.
 *
 * esp:		0x24	onboard ESP SCSI
 * le:		0x26	onboard Lance ETHERNET
 * p9100:	0x32	SBUS level 1 P9100 video
 * bpp:		0x33	SBUS level 2 BPP parallel port device
 * DBRI:	0x39	SBUS level 5 DBRI ISDN audio
 * SUNW,leo:	0x39	SBUS level 5 LEO video
 * pcmcia:	0x3b	SBUS level 6 PCMCIA controller
 * uctrl:	0x3b	SBUS level 6 UCTRL device
 * modem:	0x3d	SBUS level 7 MODEM
 * zs:		0x2c	onboard keyboard/mouse/serial
 * floppy:	0x2b	onboard Floppy
 * power:	0x22	onboard power device (XXX unknown mask bit XXX)
 */


/* Code in entry.S needs to get at these register mappings.  */
struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
struct sun4m_irq_global __iomem *sun4m_irq_global;

struct sun4m_handler_data {
	bool    percpu;
	long    mask;
};

/* Dave Redman (djhr@tadpole.co.uk)
 * The sun4m interrupt registers.
 */
#define SUN4M_INT_ENABLE	0x80000000
#define SUN4M_INT_E14		0x00000080
#define SUN4M_INT_E10		0x00080000

#define	SUN4M_INT_MASKALL	0x80000000	  /* mask all interrupts */
#define	SUN4M_INT_MODULE_ERR	0x40000000	  /* module error */
#define	SUN4M_INT_M2S_WRITE_ERR	0x20000000	  /* write buffer error */
#define	SUN4M_INT_ECC_ERR	0x10000000	  /* ecc memory error */
#define	SUN4M_INT_VME_ERR	0x08000000	  /* vme async error */
#define	SUN4M_INT_FLOPPY	0x00400000	  /* floppy disk */
#define	SUN4M_INT_MODULE	0x00200000	  /* module interrupt */
#define	SUN4M_INT_VIDEO		0x00100000	  /* onboard video */
#define	SUN4M_INT_REALTIME	0x00080000	  /* system timer */
#define	SUN4M_INT_SCSI		0x00040000	  /* onboard scsi */
#define	SUN4M_INT_AUDIO		0x00020000	  /* audio/isdn */
#define	SUN4M_INT_ETHERNET	0x00010000	  /* onboard ethernet */
#define	SUN4M_INT_SERIAL	0x00008000	  /* serial ports */
#define	SUN4M_INT_KBDMS		0x00004000	  /* keyboard/mouse */
#define	SUN4M_INT_SBUSBITS	0x00003F80	  /* sbus int bits */
#define	SUN4M_INT_VMEBITS	0x0000007F	  /* vme int bits */

#define	SUN4M_INT_ERROR		(SUN4M_INT_MODULE_ERR |    \
				 SUN4M_INT_M2S_WRITE_ERR | \
				 SUN4M_INT_ECC_ERR |       \
				 SUN4M_INT_VME_ERR)

#define SUN4M_INT_SBUS(x)	(1 << (x+7))
#define SUN4M_INT_VME(x)	(1 << (x))

/* Interrupt levels used by OBP */
#define	OBP_INT_LEVEL_SOFT	0x10
#define	OBP_INT_LEVEL_ONBOARD	0x20
#define	OBP_INT_LEVEL_SBUS	0x30
#define	OBP_INT_LEVEL_VME	0x40

#define SUN4M_TIMER_IRQ         (OBP_INT_LEVEL_ONBOARD | 10)
#define SUN4M_PROFILE_IRQ       (OBP_INT_LEVEL_ONBOARD | 14)

static unsigned long sun4m_imask[0x50] = {
	/* 0x00 - SMP */
	0,  SUN4M_SOFT_INT(1),
	SUN4M_SOFT_INT(2),  SUN4M_SOFT_INT(3),
	SUN4M_SOFT_INT(4),  SUN4M_SOFT_INT(5),
	SUN4M_SOFT_INT(6),  SUN4M_SOFT_INT(7),
	SUN4M_SOFT_INT(8),  SUN4M_SOFT_INT(9),
	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
	/* 0x10 - soft */
	0,  SUN4M_SOFT_INT(1),
	SUN4M_SOFT_INT(2),  SUN4M_SOFT_INT(3),
	SUN4M_SOFT_INT(4),  SUN4M_SOFT_INT(5),
	SUN4M_SOFT_INT(6),  SUN4M_SOFT_INT(7),
	SUN4M_SOFT_INT(8),  SUN4M_SOFT_INT(9),
	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
	/* 0x20 - onboard */
	0, 0, 0, 0,
	SUN4M_INT_SCSI,  0, SUN4M_INT_ETHERNET, 0,
	SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
	SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
	(SUN4M_INT_SERIAL | SUN4M_INT_KBDMS),
	SUN4M_INT_AUDIO, SUN4M_INT_E14, SUN4M_INT_MODULE_ERR,
	/* 0x30 - sbus */
	0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
	0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
	0, SUN4M_INT_SBUS(4), 0, SUN4M_INT_SBUS(5),
	0, SUN4M_INT_SBUS(6), 0, 0,
	/* 0x40 - vme */
	0, 0, SUN4M_INT_VME(0), SUN4M_INT_VME(1),
	0, SUN4M_INT_VME(2), 0, SUN4M_INT_VME(3),
	0, SUN4M_INT_VME(4), 0, SUN4M_INT_VME(5),
	0, SUN4M_INT_VME(6), 0, 0
};

static void sun4m_mask_irq(struct irq_data *data)
{
	struct sun4m_handler_data *handler_data;
	int cpu = smp_processor_id();

	handler_data = irq_data_get_irq_handler_data(data);
	if (handler_data->mask) {
		unsigned long flags;

		local_irq_save(flags);
		if (handler_data->percpu) {
			sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->set);
		} else {
			sbus_writel(handler_data->mask, &sun4m_irq_global->mask_set);
		}
		local_irq_restore(flags);
	}
}

static void sun4m_unmask_irq(struct irq_data *data)
{
	struct sun4m_handler_data *handler_data;
	int cpu = smp_processor_id();

	handler_data = irq_data_get_irq_handler_data(data);
	if (handler_data->mask) {
		unsigned long flags;

		local_irq_save(flags);
		if (handler_data->percpu) {
			sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->clear);
		} else {
			sbus_writel(handler_data->mask, &sun4m_irq_global->mask_clear);
		}
		local_irq_restore(flags);
	}
}

static unsigned int sun4m_startup_irq(struct irq_data *data)
{
	irq_link(data->irq);
	sun4m_unmask_irq(data);
	return 0;
}

static void sun4m_shutdown_irq(struct irq_data *data)
{
	sun4m_mask_irq(data);
	irq_unlink(data->irq);
}

static struct irq_chip sun4m_irq = {
	.name		= "sun4m",
	.irq_startup	= sun4m_startup_irq,
	.irq_shutdown	= sun4m_shutdown_irq,
	.irq_mask	= sun4m_mask_irq,
	.irq_unmask	= sun4m_unmask_irq,
};


static unsigned int sun4m_build_device_irq(struct platform_device *op,
					   unsigned int real_irq)
{
	struct sun4m_handler_data *handler_data;
	unsigned int irq;
	unsigned int pil;

	if (real_irq >= OBP_INT_LEVEL_VME) {
		prom_printf("Bogus sun4m IRQ %u\n", real_irq);
		prom_halt();
	}
	pil = (real_irq & 0xf);
	irq = irq_alloc(real_irq, pil);

	if (irq == 0)
		goto out;

	handler_data = irq_get_handler_data(irq);
	if (unlikely(handler_data))
		goto out;

	handler_data = kzalloc(sizeof(struct sun4m_handler_data), GFP_ATOMIC);
	if (unlikely(!handler_data)) {
		prom_printf("IRQ: kzalloc(sun4m_handler_data) failed.\n");
		prom_halt();
	}

	handler_data->mask = sun4m_imask[real_irq];
	handler_data->percpu = real_irq < OBP_INT_LEVEL_ONBOARD;
	irq_set_chip_and_handler_name(irq, &sun4m_irq,
	                              handle_level_irq, "level");
	irq_set_handler_data(irq, handler_data);

out:
	return irq;
}

struct sun4m_timer_percpu {
	u32		l14_limit;
	u32		l14_count;
	u32		l14_limit_noclear;
	u32		user_timer_start_stop;
};

static struct sun4m_timer_percpu __iomem *timers_percpu[SUN4M_NCPUS];

struct sun4m_timer_global {
	u32		l10_limit;
	u32		l10_count;
	u32		l10_limit_noclear;
	u32		reserved;
	u32		timer_config;
};

static struct sun4m_timer_global __iomem *timers_global;

static void sun4m_clear_clock_irq(void)
{
	sbus_readl(&timers_global->l10_limit);
}

void sun4m_nmi(struct pt_regs *regs)
{
	unsigned long afsr, afar, si;

	printk(KERN_ERR "Aieee: sun4m NMI received!\n");
	/* XXX HyperSparc hack XXX */
	__asm__ __volatile__("mov 0x500, %%g1\n\t"
			     "lda [%%g1] 0x4, %0\n\t"
			     "mov 0x600, %%g1\n\t"
			     "lda [%%g1] 0x4, %1\n\t" :
			     "=r" (afsr), "=r" (afar));
	printk(KERN_ERR "afsr=%08lx afar=%08lx\n", afsr, afar);
	si = sbus_readl(&sun4m_irq_global->pending);
	printk(KERN_ERR "si=%08lx\n", si);
	if (si & SUN4M_INT_MODULE_ERR)
		printk(KERN_ERR "Module async error\n");
	if (si & SUN4M_INT_M2S_WRITE_ERR)
		printk(KERN_ERR "MBus/SBus async error\n");
	if (si & SUN4M_INT_ECC_ERR)
		printk(KERN_ERR "ECC memory error\n");
	if (si & SUN4M_INT_VME_ERR)
		printk(KERN_ERR "VME async error\n");
	printk(KERN_ERR "you lose buddy boy...\n");
	show_regs(regs);
	prom_halt();
}

void sun4m_unmask_profile_irq(void)
{
	unsigned long flags;

	local_irq_save(flags);
	sbus_writel(sun4m_imask[SUN4M_PROFILE_IRQ], &sun4m_irq_global->mask_clear);
	local_irq_restore(flags);
}

void sun4m_clear_profile_irq(int cpu)
{
	sbus_readl(&timers_percpu[cpu]->l14_limit);
}

static void sun4m_load_profile_irq(int cpu, unsigned int limit)
{
	unsigned int value = limit ? timer_value(limit) : 0;
	sbus_writel(value, &timers_percpu[cpu]->l14_limit);
}

static void __init sun4m_init_timers(void)
{
	struct device_node *dp = of_find_node_by_name(NULL, "counter");
	int i, err, len, num_cpu_timers;
	unsigned int irq;
	const u32 *addr;

	if (!dp) {
		printk(KERN_ERR "sun4m_init_timers: No 'counter' node.\n");
		return;
	}

	addr = of_get_property(dp, "address", &len);
	of_node_put(dp);
	if (!addr) {
		printk(KERN_ERR "sun4m_init_timers: No 'address' prop.\n");
		return;
	}

	num_cpu_timers = (len / sizeof(u32)) - 1;
	for (i = 0; i < num_cpu_timers; i++) {
		timers_percpu[i] = (void __iomem *)
			(unsigned long) addr[i];
	}
	timers_global = (void __iomem *)
		(unsigned long) addr[num_cpu_timers];

	/* Every per-cpu timer works in timer mode */
	sbus_writel(0x00000000, &timers_global->timer_config);

#ifdef CONFIG_SMP
	sparc_config.cs_period = SBUS_CLOCK_RATE * 2;  /* 2 seconds */
	sparc_config.features |= FEAT_L14_ONESHOT;
#else
	sparc_config.cs_period = SBUS_CLOCK_RATE / HZ; /* 1/HZ sec  */
	sparc_config.features |= FEAT_L10_CLOCKEVENT;
#endif
	sparc_config.features |= FEAT_L10_CLOCKSOURCE;
	sbus_writel(timer_value(sparc_config.cs_period),
	            &timers_global->l10_limit);

	master_l10_counter = &timers_global->l10_count;

	irq = sun4m_build_device_irq(NULL, SUN4M_TIMER_IRQ);

	err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL);
	if (err) {
		printk(KERN_ERR "sun4m_init_timers: Register IRQ error %d.\n",
			err);
		return;
	}

	for (i = 0; i < num_cpu_timers; i++)
		sbus_writel(0, &timers_percpu[i]->l14_limit);
	if (num_cpu_timers == 4)
		sbus_writel(SUN4M_INT_E14, &sun4m_irq_global->mask_set);

#ifdef CONFIG_SMP
	{
		unsigned long flags;
		struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];

		/* For SMP we use the level 14 ticker, however the bootup code
		 * has copied the firmware's level 14 vector into the boot cpu's
		 * trap table, we must fix this now or we get squashed.
		 */
		local_irq_save(flags);
		trap_table->inst_one = lvl14_save[0];
		trap_table->inst_two = lvl14_save[1];
		trap_table->inst_three = lvl14_save[2];
		trap_table->inst_four = lvl14_save[3];
		local_ops->cache_all();
		local_irq_restore(flags);
	}
#endif
}

void __init sun4m_init_IRQ(void)
{
	struct device_node *dp = of_find_node_by_name(NULL, "interrupt");
	int len, i, mid, num_cpu_iregs;
	const u32 *addr;

	if (!dp) {
		printk(KERN_ERR "sun4m_init_IRQ: No 'interrupt' node.\n");
		return;
	}

	addr = of_get_property(dp, "address", &len);
	of_node_put(dp);
	if (!addr) {
		printk(KERN_ERR "sun4m_init_IRQ: No 'address' prop.\n");
		return;
	}

	num_cpu_iregs = (len / sizeof(u32)) - 1;
	for (i = 0; i < num_cpu_iregs; i++) {
		sun4m_irq_percpu[i] = (void __iomem *)
			(unsigned long) addr[i];
	}
	sun4m_irq_global = (void __iomem *)
		(unsigned long) addr[num_cpu_iregs];

	local_irq_disable();

	sbus_writel(~SUN4M_INT_MASKALL, &sun4m_irq_global->mask_set);
	for (i = 0; !cpu_find_by_instance(i, NULL, &mid); i++)
		sbus_writel(~0x17fff, &sun4m_irq_percpu[mid]->clear);

	if (num_cpu_iregs == 4)
		sbus_writel(0, &sun4m_irq_global->interrupt_target);

	sparc_config.init_timers      = sun4m_init_timers;
	sparc_config.build_device_irq = sun4m_build_device_irq;
	sparc_config.clock_rate       = SBUS_CLOCK_RATE;
	sparc_config.clear_clock_irq  = sun4m_clear_clock_irq;
	sparc_config.load_profile_irq = sun4m_load_profile_irq;


	/* Cannot enable interrupts until OBP ticker is disabled. */
}
Commit	Line	Data
aba20a82 SR	1	/*
aba20a82 SR	2	* sun4m irq support
1da177e4 LT	3	*
	4	* djhr: Hacked out of irq.c into a CPU dependent version.
	5	*
	6	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	7	* Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
	8	* Copyright (C) 1995 Pete A. Zaitcev (zaitcev@yahoo.com)
	9	* Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
	10	*/
	11
a755180b SR	12	#include <linux/slab.h>
a755180b SR	13
1da177e4	14	#include <asm/timer.h>
1da177e4 LT	15	#include <asm/traps.h>
	16	#include <asm/pgalloc.h>
	17	#include <asm/pgtable.h>
1da177e4 LT	18	#include <asm/irq.h>
1da177e4 LT	19	#include <asm/io.h>
1da177e4 LT	20	#include <asm/cacheflush.h>
1da177e4 LT	21
32231a66	22	#include "irq.h"
aba20a82 SR	23	#include "kernel.h"
	24
	25	/* Sample sun4m IRQ layout:
	26	*
	27	* 0x22 - Power
	28	* 0x24 - ESP SCSI
	29	* 0x26 - Lance ethernet
	30	* 0x2b - Floppy
	31	* 0x2c - Zilog uart
	32	* 0x32 - SBUS level 0
	33	* 0x33 - Parallel port, SBUS level 1
	34	* 0x35 - SBUS level 2
	35	* 0x37 - SBUS level 3
	36	* 0x39 - Audio, Graphics card, SBUS level 4
	37	* 0x3b - SBUS level 5
	38	* 0x3d - SBUS level 6
	39	*
	40	* Each interrupt source has a mask bit in the interrupt registers.
	41	* When the mask bit is set, this blocks interrupt deliver. So you
	42	* clear the bit to enable the interrupt.
	43	*
	44	* Interrupts numbered less than 0x10 are software triggered interrupts
	45	* and unused by Linux.
	46	*
	47	* Interrupt level assignment on sun4m:
	48	*
	49	* level source
	50	* ------------------------------------------------------------
	51	* 1 softint-1
	52	* 2 softint-2, VME/SBUS level 1
	53	* 3 softint-3, VME/SBUS level 2
	54	* 4 softint-4, onboard SCSI
	55	* 5 softint-5, VME/SBUS level 3
	56	* 6 softint-6, onboard ETHERNET
	57	* 7 softint-7, VME/SBUS level 4
	58	* 8 softint-8, onboard VIDEO
	59	* 9 softint-9, VME/SBUS level 5, Module Interrupt
	60	* 10 softint-10, system counter/timer
	61	* 11 softint-11, VME/SBUS level 6, Floppy
	62	* 12 softint-12, Keyboard/Mouse, Serial
	63	* 13 softint-13, VME/SBUS level 7, ISDN Audio
	64	* 14 softint-14, per-processor counter/timer
	65	* 15 softint-15, Asynchronous Errors (broadcast)
	66	*
	67	* Each interrupt source is masked distinctly in the sun4m interrupt
	68	* registers. The PIL level alone is therefore ambiguous, since multiple
	69	* interrupt sources map to a single PIL.
	70	*
	71	* This ambiguity is resolved in the 'intr' property for device nodes
	72	* in the OF device tree. Each 'intr' property entry is composed of
	73	* two 32-bit words. The first word is the IRQ priority value, which
	74	* is what we're intersted in. The second word is the IRQ vector, which
	75	* is unused.
	76	*
	77	* The low 4 bits of the IRQ priority indicate the PIL, and the upper
	78	* 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
	79	* means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
	80	*
	81	* For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
	82	* whereas a value of 0x33 is SBUS level 2. Here are some sample
	83	* 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
	84	* Tadpole S3 GX systems.
	85	*
	86	* esp: 0x24 onboard ESP SCSI
87	* le: 0x26 onboard Lance ETHERNET
88	* p9100: 0x32 SBUS level 1 P9100 video
89	* bpp: 0x33 SBUS level 2 BPP parallel port device
90	* DBRI: 0x39 SBUS level 5 DBRI ISDN audio
91	* SUNW,leo: 0x39 SBUS level 5 LEO video
92	* pcmcia: 0x3b SBUS level 6 PCMCIA controller
93	* uctrl: 0x3b SBUS level 6 UCTRL device
94	* modem: 0x3d SBUS level 7 MODEM
95	* zs: 0x2c onboard keyboard/mouse/serial
96	* floppy: 0x2b onboard Floppy
97	* power: 0x22 onboard power device (XXX unknown mask bit XXX)
98	*/
99
32231a66	100
69c010b2 DM	101	/* Code in entry.S needs to get at these register mappings. */
	102	struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
	103	struct sun4m_irq_global __iomem *sun4m_irq_global;
1da177e4	104
6baa9b20 SR	105	struct sun4m_handler_data {
	106	bool percpu;
	107	long mask;
	108	};
	109
32231a66 AV	110	/* Dave Redman (djhr@tadpole.co.uk)
	111	* The sun4m interrupt registers.
	112	*/
aba20a82 SR	113	#define SUN4M_INT_ENABLE 0x80000000
	114	#define SUN4M_INT_E14 0x00000080
	115	#define SUN4M_INT_E10 0x00080000
32231a66	116
32231a66 AV	117	#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
32231a66 AV	118	#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
6cf4a924 RR	119	#define SUN4M_INT_M2S_WRITE_ERR 0x20000000 /* write buffer error */
	120	#define SUN4M_INT_ECC_ERR 0x10000000 /* ecc memory error */
	121	#define SUN4M_INT_VME_ERR 0x08000000 /* vme async error */
32231a66 AV	122	#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
	123	#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
	124	#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
	125	#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
	126	#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
	127	#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
	128	#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
	129	#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
	130	#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
	131	#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
6cf4a924 RR	132	#define SUN4M_INT_VMEBITS 0x0000007F /* vme int bits */
	133
	134	#define SUN4M_INT_ERROR (SUN4M_INT_MODULE_ERR \| \
	135	SUN4M_INT_M2S_WRITE_ERR \| \
	136	SUN4M_INT_ECC_ERR \| \
	137	SUN4M_INT_VME_ERR)
32231a66 AV	138
	139	#define SUN4M_INT_SBUS(x) (1 << (x+7))
	140	#define SUN4M_INT_VME(x) (1 << (x))
	141
6cf4a924 RR	142	/* Interrupt levels used by OBP */
	143	#define OBP_INT_LEVEL_SOFT 0x10
	144	#define OBP_INT_LEVEL_ONBOARD 0x20
	145	#define OBP_INT_LEVEL_SBUS 0x30
	146	#define OBP_INT_LEVEL_VME 0x40
	147
0399bb5b	148	#define SUN4M_TIMER_IRQ (OBP_INT_LEVEL_ONBOARD \| 10)
6baa9b20	149	#define SUN4M_PROFILE_IRQ (OBP_INT_LEVEL_ONBOARD \| 14)
0399bb5b	150
6baa9b20	151	static unsigned long sun4m_imask[0x50] = {
0399bb5b	152	/* 0x00 - SMP */
6cf4a924 RR	153	0, SUN4M_SOFT_INT(1),
	154	SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
	155	SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
	156	SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
	157	SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
	158	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	159	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	160	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
0399bb5b	161	/* 0x10 - soft */
6cf4a924 RR	162	0, SUN4M_SOFT_INT(1),
	163	SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
	164	SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
	165	SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
	166	SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
	167	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	168	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	169	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
0399bb5b	170	/* 0x20 - onboard */
6cf4a924 RR	171	0, 0, 0, 0,
	172	SUN4M_INT_SCSI, 0, SUN4M_INT_ETHERNET, 0,
	173	SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
	174	SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
	175	(SUN4M_INT_SERIAL \| SUN4M_INT_KBDMS),
6baa9b20	176	SUN4M_INT_AUDIO, SUN4M_INT_E14, SUN4M_INT_MODULE_ERR,
0399bb5b	177	/* 0x30 - sbus */
6cf4a924 RR	178	0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
	179	0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
	180	0, SUN4M_INT_SBUS(4), 0, SUN4M_INT_SBUS(5),
	181	0, SUN4M_INT_SBUS(6), 0, 0,
0399bb5b	182	/* 0x40 - vme */
6cf4a924 RR	183	0, 0, SUN4M_INT_VME(0), SUN4M_INT_VME(1),
	184	0, SUN4M_INT_VME(2), 0, SUN4M_INT_VME(3),
	185	0, SUN4M_INT_VME(4), 0, SUN4M_INT_VME(5),
	186	0, SUN4M_INT_VME(6), 0, 0
1da177e4 LT	187	};
1da177e4 LT	188
6baa9b20	189	static void sun4m_mask_irq(struct irq_data *data)
1da177e4	190	{
6a4a5b34	191	struct sun4m_handler_data *handler_data;
6baa9b20	192	int cpu = smp_processor_id();
6cf4a924	193
6a4a5b34	194	handler_data = irq_data_get_irq_handler_data(data);
6baa9b20 SR	195	if (handler_data->mask) {
6baa9b20 SR	196	unsigned long flags;
6cf4a924	197
6baa9b20 SR	198	local_irq_save(flags);
	199	if (handler_data->percpu) {
	200	sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->set);
	201	} else {
	202	sbus_writel(handler_data->mask, &sun4m_irq_global->mask_set);
	203	}
	204	local_irq_restore(flags);
	205	}
1da177e4 LT	206	}
1da177e4 LT	207
6baa9b20	208	static void sun4m_unmask_irq(struct irq_data *data)
1da177e4	209	{
6a4a5b34	210	struct sun4m_handler_data *handler_data;
1da177e4 LT	211	int cpu = smp_processor_id();
1da177e4 LT	212
6a4a5b34	213	handler_data = irq_data_get_irq_handler_data(data);
6baa9b20 SR	214	if (handler_data->mask) {
6baa9b20 SR	215	unsigned long flags;
1da177e4	216
1da177e4	217	local_irq_save(flags);
6baa9b20 SR	218	if (handler_data->percpu) {
	219	sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->clear);
	220	} else {
	221	sbus_writel(handler_data->mask, &sun4m_irq_global->mask_clear);
	222	}
1da177e4 LT	223	local_irq_restore(flags);
	224	}
	225	}
	226
6baa9b20 SR	227	static unsigned int sun4m_startup_irq(struct irq_data *data)
	228	{
	229	irq_link(data->irq);
	230	sun4m_unmask_irq(data);
	231	return 0;
	232	}
1da177e4	233
6baa9b20	234	static void sun4m_shutdown_irq(struct irq_data *data)
1da177e4	235	{
6baa9b20 SR	236	sun4m_mask_irq(data);
6baa9b20 SR	237	irq_unlink(data->irq);
1da177e4 LT	238	}
1da177e4 LT	239
6baa9b20 SR	240	static struct irq_chip sun4m_irq = {
	241	.name = "sun4m",
	242	.irq_startup = sun4m_startup_irq,
	243	.irq_shutdown = sun4m_shutdown_irq,
	244	.irq_mask = sun4m_mask_irq,
	245	.irq_unmask = sun4m_unmask_irq,
	246	};
	247
	248
	249	static unsigned int sun4m_build_device_irq(struct platform_device *op,
	250	unsigned int real_irq)
1da177e4	251	{
6baa9b20 SR	252	struct sun4m_handler_data *handler_data;
	253	unsigned int irq;
	254	unsigned int pil;
	255
	256	if (real_irq >= OBP_INT_LEVEL_VME) {
	257	prom_printf("Bogus sun4m IRQ %u\n", real_irq);
	258	prom_halt();
	259	}
	260	pil = (real_irq & 0xf);
	261	irq = irq_alloc(real_irq, pil);
	262
	263	if (irq == 0)
	264	goto out;
	265
	266	handler_data = irq_get_handler_data(irq);
	267	if (unlikely(handler_data))
	268	goto out;
	269
	270	handler_data = kzalloc(sizeof(struct sun4m_handler_data), GFP_ATOMIC);
	271	if (unlikely(!handler_data)) {
	272	prom_printf("IRQ: kzalloc(sun4m_handler_data) failed.\n");
	273	prom_halt();
	274	}
	275
	276	handler_data->mask = sun4m_imask[real_irq];
	277	handler_data->percpu = real_irq < OBP_INT_LEVEL_ONBOARD;
	278	irq_set_chip_and_handler_name(irq, &sun4m_irq,
	279	handle_level_irq, "level");
	280	irq_set_handler_data(irq, handler_data);
	281
	282	out:
	283	return irq;
1da177e4 LT	284	}
1da177e4 LT	285
9b2e43ae DM	286	struct sun4m_timer_percpu {
	287	u32 l14_limit;
	288	u32 l14_count;
	289	u32 l14_limit_noclear;
	290	u32 user_timer_start_stop;
	291	};
	292
	293	static struct sun4m_timer_percpu __iomem *timers_percpu[SUN4M_NCPUS];
	294
	295	struct sun4m_timer_global {
	296	u32 l10_limit;
	297	u32 l10_count;
	298	u32 l10_limit_noclear;
	299	u32 reserved;
	300	u32 timer_config;
	301	};
	302
	303	static struct sun4m_timer_global __iomem *timers_global;
	304
1da177e4 LT	305	static void sun4m_clear_clock_irq(void)
1da177e4 LT	306	{
9b2e43ae	307	sbus_readl(&timers_global->l10_limit);
1da177e4 LT	308	}
1da177e4 LT	309
6cf4a924 RR	310	void sun4m_nmi(struct pt_regs *regs)
	311	{
	312	unsigned long afsr, afar, si;
	313
	314	printk(KERN_ERR "Aieee: sun4m NMI received!\n");
	315	/* XXX HyperSparc hack XXX */
	316	__asm__ __volatile__("mov 0x500, %%g1\n\t"
	317	"lda [%%g1] 0x4, %0\n\t"
	318	"mov 0x600, %%g1\n\t"
	319	"lda [%%g1] 0x4, %1\n\t" :
	320	"=r" (afsr), "=r" (afar));
	321	printk(KERN_ERR "afsr=%08lx afar=%08lx\n", afsr, afar);
	322	si = sbus_readl(&sun4m_irq_global->pending);
	323	printk(KERN_ERR "si=%08lx\n", si);
	324	if (si & SUN4M_INT_MODULE_ERR)
	325	printk(KERN_ERR "Module async error\n");
	326	if (si & SUN4M_INT_M2S_WRITE_ERR)
	327	printk(KERN_ERR "MBus/SBus async error\n");
	328	if (si & SUN4M_INT_ECC_ERR)
	329	printk(KERN_ERR "ECC memory error\n");
	330	if (si & SUN4M_INT_VME_ERR)
	331	printk(KERN_ERR "VME async error\n");
	332	printk(KERN_ERR "you lose buddy boy...\n");
	333	show_regs(regs);
	334	prom_halt();
	335	}
	336
6baa9b20 SR	337	void sun4m_unmask_profile_irq(void)
	338	{
	339	unsigned long flags;
	340
	341	local_irq_save(flags);
	342	sbus_writel(sun4m_imask[SUN4M_PROFILE_IRQ], &sun4m_irq_global->mask_clear);
	343	local_irq_restore(flags);
	344	}
	345
1de937a5	346	void sun4m_clear_profile_irq(int cpu)
1da177e4	347	{
9b2e43ae	348	sbus_readl(&timers_percpu[cpu]->l14_limit);
1da177e4 LT	349	}
	350
	351	static void sun4m_load_profile_irq(int cpu, unsigned int limit)
	352	{
62f08283 TK	353	unsigned int value = limit ? timer_value(limit) : 0;
62f08283 TK	354	sbus_writel(value, &timers_percpu[cpu]->l14_limit);
1da177e4 LT	355	}
1da177e4 LT	356
62f08283	357	static void __init sun4m_init_timers(void)
1da177e4	358	{
9b2e43ae DM	359	struct device_node *dp = of_find_node_by_name(NULL, "counter");
9b2e43ae DM	360	int i, err, len, num_cpu_timers;
6baa9b20	361	unsigned int irq;
9b2e43ae DM	362	const u32 *addr;
	363
	364	if (!dp) {
	365	printk(KERN_ERR "sun4m_init_timers: No 'counter' node.\n");
	366	return;
1da177e4	367	}
9b2e43ae DM	368
9b2e43ae DM	369	addr = of_get_property(dp, "address", &len);
c2e27c35	370	of_node_put(dp);
9b2e43ae DM	371	if (!addr) {
	372	printk(KERN_ERR "sun4m_init_timers: No 'address' prop.\n");
	373	return;
1da177e4 LT	374	}
1da177e4 LT	375
9b2e43ae DM	376	num_cpu_timers = (len / sizeof(u32)) - 1;
	377	for (i = 0; i < num_cpu_timers; i++) {
	378	timers_percpu[i] = (void __iomem *)
	379	(unsigned long) addr[i];
1da177e4	380	}
9b2e43ae DM	381	timers_global = (void __iomem *)
	382	(unsigned long) addr[num_cpu_timers];
	383
e51e07e0 TK	384	/* Every per-cpu timer works in timer mode */
	385	sbus_writel(0x00000000, &timers_global->timer_config);
	386
62f08283 TK	387	#ifdef CONFIG_SMP
	388	sparc_config.cs_period = SBUS_CLOCK_RATE * 2; /* 2 seconds */
	389	sparc_config.features \|= FEAT_L14_ONESHOT;
	390	#else
	391	sparc_config.cs_period = SBUS_CLOCK_RATE / HZ; /* 1/HZ sec */
	392	sparc_config.features \|= FEAT_L10_CLOCKEVENT;
	393	#endif
	394	sparc_config.features \|= FEAT_L10_CLOCKSOURCE;
	395	sbus_writel(timer_value(sparc_config.cs_period),
	396	&timers_global->l10_limit);
9b2e43ae DM	397
9b2e43ae DM	398	master_l10_counter = &timers_global->l10_count;
9b2e43ae	399
6baa9b20 SR	400	irq = sun4m_build_device_irq(NULL, SUN4M_TIMER_IRQ);
6baa9b20 SR	401
62f08283	402	err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL);
9b2e43ae DM	403	if (err) {
	404	printk(KERN_ERR "sun4m_init_timers: Register IRQ error %d.\n",
	405	err);
	406	return;
1da177e4	407	}
9b2e43ae DM	408
	409	for (i = 0; i < num_cpu_timers; i++)
	410	sbus_writel(0, &timers_percpu[i]->l14_limit);
	411	if (num_cpu_timers == 4)
69c010b2	412	sbus_writel(SUN4M_INT_E14, &sun4m_irq_global->mask_set);
9b2e43ae	413
1da177e4 LT	414	#ifdef CONFIG_SMP
	415	{
	416	unsigned long flags;
1da177e4 LT	417	struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
	418
	419	/* For SMP we use the level 14 ticker, however the bootup code
d1a78c32	420	* has copied the firmware's level 14 vector into the boot cpu's
1da177e4 LT	421	* trap table, we must fix this now or we get squashed.
	422	*/
	423	local_irq_save(flags);
	424	trap_table->inst_one = lvl14_save[0];
	425	trap_table->inst_two = lvl14_save[1];
	426	trap_table->inst_three = lvl14_save[2];
	427	trap_table->inst_four = lvl14_save[3];
5d83d666	428	local_ops->cache_all();
1da177e4 LT	429	local_irq_restore(flags);
	430	}
	431	#endif
	432	}
	433
	434	void __init sun4m_init_IRQ(void)
	435	{
69c010b2 DM	436	struct device_node *dp = of_find_node_by_name(NULL, "interrupt");
	437	int len, i, mid, num_cpu_iregs;
	438	const u32 *addr;
	439
	440	if (!dp) {
	441	printk(KERN_ERR "sun4m_init_IRQ: No 'interrupt' node.\n");
	442	return;
1da177e4	443	}
69c010b2 DM	444
69c010b2 DM	445	addr = of_get_property(dp, "address", &len);
c2e27c35	446	of_node_put(dp);
69c010b2 DM	447	if (!addr) {
	448	printk(KERN_ERR "sun4m_init_IRQ: No 'address' prop.\n");
	449	return;
1da177e4 LT	450	}
1da177e4 LT	451
69c010b2 DM	452	num_cpu_iregs = (len / sizeof(u32)) - 1;
	453	for (i = 0; i < num_cpu_iregs; i++) {
	454	sun4m_irq_percpu[i] = (void __iomem *)
	455	(unsigned long) addr[i];
	456	}
	457	sun4m_irq_global = (void __iomem *)
	458	(unsigned long) addr[num_cpu_iregs];
1da177e4	459
69c010b2	460	local_irq_disable();
1da177e4	461
69c010b2	462	sbus_writel(~SUN4M_INT_MASKALL, &sun4m_irq_global->mask_set);
1da177e4	463	for (i = 0; !cpu_find_by_instance(i, NULL, &mid); i++)
69c010b2 DM	464	sbus_writel(~0x17fff, &sun4m_irq_percpu[mid]->clear);
69c010b2 DM	465
e7913de9	466	if (num_cpu_iregs == 4)
69c010b2	467	sbus_writel(0, &sun4m_irq_global->interrupt_target);
e7913de9	468
08c9388f	469	sparc_config.init_timers = sun4m_init_timers;
472bc4f2	470	sparc_config.build_device_irq = sun4m_build_device_irq;
62f08283	471	sparc_config.clock_rate = SBUS_CLOCK_RATE;
08c9388f SR	472	sparc_config.clear_clock_irq = sun4m_clear_clock_irq;
	473	sparc_config.load_profile_irq = sun4m_load_profile_irq;
	474
bbdc2661	475
1da177e4 LT	476	/* Cannot enable interrupts until OBP ticker is disabled. */
1da177e4 LT	477	}