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

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 <linux/sched/debug.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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
aba20a82 SR	2	/*
aba20a82 SR	3	* sun4m irq support
1da177e4 LT	4	*
	5	* djhr: Hacked out of irq.c into a CPU dependent version.
	6	*
	7	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	8	* Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
	9	* Copyright (C) 1995 Pete A. Zaitcev (zaitcev@yahoo.com)
	10	* Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
	11	*/
	12
a755180b	13	#include <linux/slab.h>
b17b0153	14	#include <linux/sched/debug.h>
a755180b	15
1da177e4	16	#include <asm/timer.h>
1da177e4 LT	17	#include <asm/traps.h>
	18	#include <asm/pgalloc.h>
	19	#include <asm/pgtable.h>
1da177e4 LT	20	#include <asm/irq.h>
1da177e4 LT	21	#include <asm/io.h>
1da177e4 LT	22	#include <asm/cacheflush.h>
1da177e4 LT	23
32231a66	24	#include "irq.h"
aba20a82 SR	25	#include "kernel.h"
	26
	27	/* Sample sun4m IRQ layout:
	28	*
	29	* 0x22 - Power
	30	* 0x24 - ESP SCSI
	31	* 0x26 - Lance ethernet
	32	* 0x2b - Floppy
	33	* 0x2c - Zilog uart
	34	* 0x32 - SBUS level 0
	35	* 0x33 - Parallel port, SBUS level 1
	36	* 0x35 - SBUS level 2
	37	* 0x37 - SBUS level 3
	38	* 0x39 - Audio, Graphics card, SBUS level 4
	39	* 0x3b - SBUS level 5
	40	* 0x3d - SBUS level 6
	41	*
	42	* Each interrupt source has a mask bit in the interrupt registers.
	43	* When the mask bit is set, this blocks interrupt deliver. So you
	44	* clear the bit to enable the interrupt.
	45	*
	46	* Interrupts numbered less than 0x10 are software triggered interrupts
	47	* and unused by Linux.
	48	*
	49	* Interrupt level assignment on sun4m:
	50	*
	51	* level source
	52	* ------------------------------------------------------------
	53	* 1 softint-1
	54	* 2 softint-2, VME/SBUS level 1
	55	* 3 softint-3, VME/SBUS level 2
	56	* 4 softint-4, onboard SCSI
	57	* 5 softint-5, VME/SBUS level 3
	58	* 6 softint-6, onboard ETHERNET
	59	* 7 softint-7, VME/SBUS level 4
	60	* 8 softint-8, onboard VIDEO
	61	* 9 softint-9, VME/SBUS level 5, Module Interrupt
	62	* 10 softint-10, system counter/timer
	63	* 11 softint-11, VME/SBUS level 6, Floppy
	64	* 12 softint-12, Keyboard/Mouse, Serial
	65	* 13 softint-13, VME/SBUS level 7, ISDN Audio
	66	* 14 softint-14, per-processor counter/timer
	67	* 15 softint-15, Asynchronous Errors (broadcast)
	68	*
	69	* Each interrupt source is masked distinctly in the sun4m interrupt
	70	* registers. The PIL level alone is therefore ambiguous, since multiple
	71	* interrupt sources map to a single PIL.
	72	*
	73	* This ambiguity is resolved in the 'intr' property for device nodes
	74	* in the OF device tree. Each 'intr' property entry is composed of
	75	* two 32-bit words. The first word is the IRQ priority value, which
	76	* is what we're intersted in. The second word is the IRQ vector, which
	77	* is unused.
	78	*
	79	* The low 4 bits of the IRQ priority indicate the PIL, and the upper
	80	* 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
	81	* means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
	82	*
	83	* For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
	84	* whereas a value of 0x33 is SBUS level 2. Here are some sample
	85	* 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
	86	* Tadpole S3 GX systems.
	87	*
	88	* esp: 0x24 onboard ESP SCSI
89	* le: 0x26 onboard Lance ETHERNET
90	* p9100: 0x32 SBUS level 1 P9100 video
91	* bpp: 0x33 SBUS level 2 BPP parallel port device
92	* DBRI: 0x39 SBUS level 5 DBRI ISDN audio
93	* SUNW,leo: 0x39 SBUS level 5 LEO video
94	* pcmcia: 0x3b SBUS level 6 PCMCIA controller
95	* uctrl: 0x3b SBUS level 6 UCTRL device
96	* modem: 0x3d SBUS level 7 MODEM
97	* zs: 0x2c onboard keyboard/mouse/serial
98	* floppy: 0x2b onboard Floppy
99	* power: 0x22 onboard power device (XXX unknown mask bit XXX)
100	*/
101
32231a66	102
69c010b2 DM	103	/* Code in entry.S needs to get at these register mappings. */
	104	struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
	105	struct sun4m_irq_global __iomem *sun4m_irq_global;
1da177e4	106
6baa9b20 SR	107	struct sun4m_handler_data {
	108	bool percpu;
	109	long mask;
	110	};
	111
32231a66 AV	112	/* Dave Redman (djhr@tadpole.co.uk)
	113	* The sun4m interrupt registers.
	114	*/
aba20a82 SR	115	#define SUN4M_INT_ENABLE 0x80000000
	116	#define SUN4M_INT_E14 0x00000080
	117	#define SUN4M_INT_E10 0x00080000
32231a66	118
32231a66 AV	119	#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
32231a66 AV	120	#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
6cf4a924 RR	121	#define SUN4M_INT_M2S_WRITE_ERR 0x20000000 /* write buffer error */
	122	#define SUN4M_INT_ECC_ERR 0x10000000 /* ecc memory error */
	123	#define SUN4M_INT_VME_ERR 0x08000000 /* vme async error */
32231a66 AV	124	#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
	125	#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
	126	#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
	127	#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
	128	#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
	129	#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
	130	#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
	131	#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
	132	#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
	133	#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
6cf4a924 RR	134	#define SUN4M_INT_VMEBITS 0x0000007F /* vme int bits */
	135
	136	#define SUN4M_INT_ERROR (SUN4M_INT_MODULE_ERR \| \
	137	SUN4M_INT_M2S_WRITE_ERR \| \
	138	SUN4M_INT_ECC_ERR \| \
	139	SUN4M_INT_VME_ERR)
32231a66 AV	140
	141	#define SUN4M_INT_SBUS(x) (1 << (x+7))
	142	#define SUN4M_INT_VME(x) (1 << (x))
	143
6cf4a924 RR	144	/* Interrupt levels used by OBP */
	145	#define OBP_INT_LEVEL_SOFT 0x10
	146	#define OBP_INT_LEVEL_ONBOARD 0x20
	147	#define OBP_INT_LEVEL_SBUS 0x30
	148	#define OBP_INT_LEVEL_VME 0x40
	149
0399bb5b	150	#define SUN4M_TIMER_IRQ (OBP_INT_LEVEL_ONBOARD \| 10)
6baa9b20	151	#define SUN4M_PROFILE_IRQ (OBP_INT_LEVEL_ONBOARD \| 14)
0399bb5b	152
6baa9b20	153	static unsigned long sun4m_imask[0x50] = {
0399bb5b	154	/* 0x00 - SMP */
6cf4a924 RR	155	0, SUN4M_SOFT_INT(1),
	156	SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
	157	SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
	158	SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
	159	SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
	160	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	161	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	162	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
0399bb5b	163	/* 0x10 - soft */
6cf4a924 RR	164	0, SUN4M_SOFT_INT(1),
	165	SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
	166	SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
	167	SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
	168	SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
	169	SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
	170	SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
	171	SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
0399bb5b	172	/* 0x20 - onboard */
6cf4a924 RR	173	0, 0, 0, 0,
	174	SUN4M_INT_SCSI, 0, SUN4M_INT_ETHERNET, 0,
	175	SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
	176	SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
	177	(SUN4M_INT_SERIAL \| SUN4M_INT_KBDMS),
6baa9b20	178	SUN4M_INT_AUDIO, SUN4M_INT_E14, SUN4M_INT_MODULE_ERR,
0399bb5b	179	/* 0x30 - sbus */
6cf4a924 RR	180	0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
	181	0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
	182	0, SUN4M_INT_SBUS(4), 0, SUN4M_INT_SBUS(5),
	183	0, SUN4M_INT_SBUS(6), 0, 0,
0399bb5b	184	/* 0x40 - vme */
6cf4a924 RR	185	0, 0, SUN4M_INT_VME(0), SUN4M_INT_VME(1),
	186	0, SUN4M_INT_VME(2), 0, SUN4M_INT_VME(3),
	187	0, SUN4M_INT_VME(4), 0, SUN4M_INT_VME(5),
	188	0, SUN4M_INT_VME(6), 0, 0
1da177e4 LT	189	};
1da177e4 LT	190
6baa9b20	191	static void sun4m_mask_irq(struct irq_data *data)
1da177e4	192	{
6a4a5b34	193	struct sun4m_handler_data *handler_data;
6baa9b20	194	int cpu = smp_processor_id();
6cf4a924	195
6a4a5b34	196	handler_data = irq_data_get_irq_handler_data(data);
6baa9b20 SR	197	if (handler_data->mask) {
6baa9b20 SR	198	unsigned long flags;
6cf4a924	199
6baa9b20 SR	200	local_irq_save(flags);
	201	if (handler_data->percpu) {
	202	sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->set);
	203	} else {
	204	sbus_writel(handler_data->mask, &sun4m_irq_global->mask_set);
	205	}
	206	local_irq_restore(flags);
	207	}
1da177e4 LT	208	}
1da177e4 LT	209
6baa9b20	210	static void sun4m_unmask_irq(struct irq_data *data)
1da177e4	211	{
6a4a5b34	212	struct sun4m_handler_data *handler_data;
1da177e4 LT	213	int cpu = smp_processor_id();
1da177e4 LT	214
6a4a5b34	215	handler_data = irq_data_get_irq_handler_data(data);
6baa9b20 SR	216	if (handler_data->mask) {
6baa9b20 SR	217	unsigned long flags;
1da177e4	218
1da177e4	219	local_irq_save(flags);
6baa9b20 SR	220	if (handler_data->percpu) {
	221	sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->clear);
	222	} else {
	223	sbus_writel(handler_data->mask, &sun4m_irq_global->mask_clear);
	224	}
1da177e4 LT	225	local_irq_restore(flags);
	226	}
	227	}
	228
6baa9b20 SR	229	static unsigned int sun4m_startup_irq(struct irq_data *data)
	230	{
	231	irq_link(data->irq);
	232	sun4m_unmask_irq(data);
	233	return 0;
	234	}
1da177e4	235
6baa9b20	236	static void sun4m_shutdown_irq(struct irq_data *data)
1da177e4	237	{
6baa9b20 SR	238	sun4m_mask_irq(data);
6baa9b20 SR	239	irq_unlink(data->irq);
1da177e4 LT	240	}
1da177e4 LT	241
6baa9b20 SR	242	static struct irq_chip sun4m_irq = {
	243	.name = "sun4m",
	244	.irq_startup = sun4m_startup_irq,
	245	.irq_shutdown = sun4m_shutdown_irq,
	246	.irq_mask = sun4m_mask_irq,
	247	.irq_unmask = sun4m_unmask_irq,
	248	};
	249
	250
	251	static unsigned int sun4m_build_device_irq(struct platform_device *op,
	252	unsigned int real_irq)
1da177e4	253	{
6baa9b20 SR	254	struct sun4m_handler_data *handler_data;
	255	unsigned int irq;
	256	unsigned int pil;
	257
	258	if (real_irq >= OBP_INT_LEVEL_VME) {
	259	prom_printf("Bogus sun4m IRQ %u\n", real_irq);
	260	prom_halt();
	261	}
	262	pil = (real_irq & 0xf);
	263	irq = irq_alloc(real_irq, pil);
	264
	265	if (irq == 0)
	266	goto out;
	267
	268	handler_data = irq_get_handler_data(irq);
	269	if (unlikely(handler_data))
	270	goto out;
	271
	272	handler_data = kzalloc(sizeof(struct sun4m_handler_data), GFP_ATOMIC);
	273	if (unlikely(!handler_data)) {
	274	prom_printf("IRQ: kzalloc(sun4m_handler_data) failed.\n");
	275	prom_halt();
	276	}
	277
	278	handler_data->mask = sun4m_imask[real_irq];
	279	handler_data->percpu = real_irq < OBP_INT_LEVEL_ONBOARD;
	280	irq_set_chip_and_handler_name(irq, &sun4m_irq,
	281	handle_level_irq, "level");
	282	irq_set_handler_data(irq, handler_data);
	283
	284	out:
	285	return irq;
1da177e4 LT	286	}
1da177e4 LT	287
9b2e43ae DM	288	struct sun4m_timer_percpu {
	289	u32 l14_limit;
	290	u32 l14_count;
	291	u32 l14_limit_noclear;
	292	u32 user_timer_start_stop;
	293	};
	294
	295	static struct sun4m_timer_percpu __iomem *timers_percpu[SUN4M_NCPUS];
	296
	297	struct sun4m_timer_global {
	298	u32 l10_limit;
	299	u32 l10_count;
	300	u32 l10_limit_noclear;
	301	u32 reserved;
	302	u32 timer_config;
	303	};
	304
	305	static struct sun4m_timer_global __iomem *timers_global;
	306
1da177e4 LT	307	static void sun4m_clear_clock_irq(void)
1da177e4 LT	308	{
9b2e43ae	309	sbus_readl(&timers_global->l10_limit);
1da177e4 LT	310	}
1da177e4 LT	311
6cf4a924 RR	312	void sun4m_nmi(struct pt_regs *regs)
	313	{
	314	unsigned long afsr, afar, si;
	315
	316	printk(KERN_ERR "Aieee: sun4m NMI received!\n");
	317	/* XXX HyperSparc hack XXX */
	318	__asm__ __volatile__("mov 0x500, %%g1\n\t"
	319	"lda [%%g1] 0x4, %0\n\t"
	320	"mov 0x600, %%g1\n\t"
	321	"lda [%%g1] 0x4, %1\n\t" :
	322	"=r" (afsr), "=r" (afar));
	323	printk(KERN_ERR "afsr=%08lx afar=%08lx\n", afsr, afar);
	324	si = sbus_readl(&sun4m_irq_global->pending);
	325	printk(KERN_ERR "si=%08lx\n", si);
	326	if (si & SUN4M_INT_MODULE_ERR)
	327	printk(KERN_ERR "Module async error\n");
	328	if (si & SUN4M_INT_M2S_WRITE_ERR)
	329	printk(KERN_ERR "MBus/SBus async error\n");
	330	if (si & SUN4M_INT_ECC_ERR)
	331	printk(KERN_ERR "ECC memory error\n");
	332	if (si & SUN4M_INT_VME_ERR)
	333	printk(KERN_ERR "VME async error\n");
	334	printk(KERN_ERR "you lose buddy boy...\n");
	335	show_regs(regs);
	336	prom_halt();
	337	}
	338
6baa9b20 SR	339	void sun4m_unmask_profile_irq(void)
	340	{
	341	unsigned long flags;
	342
	343	local_irq_save(flags);
	344	sbus_writel(sun4m_imask[SUN4M_PROFILE_IRQ], &sun4m_irq_global->mask_clear);
	345	local_irq_restore(flags);
	346	}
	347
1de937a5	348	void sun4m_clear_profile_irq(int cpu)
1da177e4	349	{
9b2e43ae	350	sbus_readl(&timers_percpu[cpu]->l14_limit);
1da177e4 LT	351	}
	352
	353	static void sun4m_load_profile_irq(int cpu, unsigned int limit)
	354	{
62f08283 TK	355	unsigned int value = limit ? timer_value(limit) : 0;
62f08283 TK	356	sbus_writel(value, &timers_percpu[cpu]->l14_limit);
1da177e4 LT	357	}
1da177e4 LT	358
62f08283	359	static void __init sun4m_init_timers(void)
1da177e4	360	{
9b2e43ae DM	361	struct device_node *dp = of_find_node_by_name(NULL, "counter");
9b2e43ae DM	362	int i, err, len, num_cpu_timers;
6baa9b20	363	unsigned int irq;
9b2e43ae DM	364	const u32 *addr;
	365
	366	if (!dp) {
	367	printk(KERN_ERR "sun4m_init_timers: No 'counter' node.\n");
	368	return;
1da177e4	369	}
9b2e43ae DM	370
9b2e43ae DM	371	addr = of_get_property(dp, "address", &len);
c2e27c35	372	of_node_put(dp);
9b2e43ae DM	373	if (!addr) {
	374	printk(KERN_ERR "sun4m_init_timers: No 'address' prop.\n");
	375	return;
1da177e4 LT	376	}
1da177e4 LT	377
9b2e43ae DM	378	num_cpu_timers = (len / sizeof(u32)) - 1;
	379	for (i = 0; i < num_cpu_timers; i++) {
	380	timers_percpu[i] = (void __iomem *)
	381	(unsigned long) addr[i];
1da177e4	382	}
9b2e43ae DM	383	timers_global = (void __iomem *)
	384	(unsigned long) addr[num_cpu_timers];
	385
e51e07e0 TK	386	/* Every per-cpu timer works in timer mode */
	387	sbus_writel(0x00000000, &timers_global->timer_config);
	388
62f08283 TK	389	#ifdef CONFIG_SMP
	390	sparc_config.cs_period = SBUS_CLOCK_RATE * 2; /* 2 seconds */
	391	sparc_config.features \|= FEAT_L14_ONESHOT;
	392	#else
	393	sparc_config.cs_period = SBUS_CLOCK_RATE / HZ; /* 1/HZ sec */
	394	sparc_config.features \|= FEAT_L10_CLOCKEVENT;
	395	#endif
	396	sparc_config.features \|= FEAT_L10_CLOCKSOURCE;
	397	sbus_writel(timer_value(sparc_config.cs_period),
	398	&timers_global->l10_limit);
9b2e43ae DM	399
9b2e43ae DM	400	master_l10_counter = &timers_global->l10_count;
9b2e43ae	401
6baa9b20 SR	402	irq = sun4m_build_device_irq(NULL, SUN4M_TIMER_IRQ);
6baa9b20 SR	403
62f08283	404	err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL);
9b2e43ae DM	405	if (err) {
	406	printk(KERN_ERR "sun4m_init_timers: Register IRQ error %d.\n",
	407	err);
	408	return;
1da177e4	409	}
9b2e43ae DM	410
	411	for (i = 0; i < num_cpu_timers; i++)
	412	sbus_writel(0, &timers_percpu[i]->l14_limit);
	413	if (num_cpu_timers == 4)
69c010b2	414	sbus_writel(SUN4M_INT_E14, &sun4m_irq_global->mask_set);
9b2e43ae	415
1da177e4 LT	416	#ifdef CONFIG_SMP
	417	{
	418	unsigned long flags;
1da177e4 LT	419	struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
	420
	421	/* For SMP we use the level 14 ticker, however the bootup code
d1a78c32	422	* has copied the firmware's level 14 vector into the boot cpu's
1da177e4 LT	423	* trap table, we must fix this now or we get squashed.
	424	*/
	425	local_irq_save(flags);
	426	trap_table->inst_one = lvl14_save[0];
	427	trap_table->inst_two = lvl14_save[1];
	428	trap_table->inst_three = lvl14_save[2];
	429	trap_table->inst_four = lvl14_save[3];
5d83d666	430	local_ops->cache_all();
1da177e4 LT	431	local_irq_restore(flags);
	432	}
	433	#endif
	434	}
	435
	436	void __init sun4m_init_IRQ(void)
	437	{
69c010b2 DM	438	struct device_node *dp = of_find_node_by_name(NULL, "interrupt");
	439	int len, i, mid, num_cpu_iregs;
	440	const u32 *addr;
	441
	442	if (!dp) {
	443	printk(KERN_ERR "sun4m_init_IRQ: No 'interrupt' node.\n");
	444	return;
1da177e4	445	}
69c010b2 DM	446
69c010b2 DM	447	addr = of_get_property(dp, "address", &len);
c2e27c35	448	of_node_put(dp);
69c010b2 DM	449	if (!addr) {
	450	printk(KERN_ERR "sun4m_init_IRQ: No 'address' prop.\n");
	451	return;
1da177e4 LT	452	}
1da177e4 LT	453
69c010b2 DM	454	num_cpu_iregs = (len / sizeof(u32)) - 1;
	455	for (i = 0; i < num_cpu_iregs; i++) {
	456	sun4m_irq_percpu[i] = (void __iomem *)
	457	(unsigned long) addr[i];
	458	}
	459	sun4m_irq_global = (void __iomem *)
	460	(unsigned long) addr[num_cpu_iregs];
1da177e4	461
69c010b2	462	local_irq_disable();
1da177e4	463
69c010b2	464	sbus_writel(~SUN4M_INT_MASKALL, &sun4m_irq_global->mask_set);
1da177e4	465	for (i = 0; !cpu_find_by_instance(i, NULL, &mid); i++)
69c010b2 DM	466	sbus_writel(~0x17fff, &sun4m_irq_percpu[mid]->clear);
69c010b2 DM	467
e7913de9	468	if (num_cpu_iregs == 4)
69c010b2	469	sbus_writel(0, &sun4m_irq_global->interrupt_target);
e7913de9	470
08c9388f	471	sparc_config.init_timers = sun4m_init_timers;
472bc4f2	472	sparc_config.build_device_irq = sun4m_build_device_irq;
62f08283	473	sparc_config.clock_rate = SBUS_CLOCK_RATE;
08c9388f SR	474	sparc_config.clear_clock_irq = sun4m_clear_clock_irq;
	475	sparc_config.load_profile_irq = sun4m_load_profile_irq;
	476
bbdc2661	477
1da177e4 LT	478	/* Cannot enable interrupts until OBP ticker is disabled. */
1da177e4 LT	479	}