[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / leon_kernel.c

/*
 * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
 * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>

#include <asm/oplib.h>
#include <asm/timer.h>
#include <asm/prom.h>
#include <asm/leon.h>
#include <asm/leon_amba.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
#include <asm/smp.h>
#include <asm/setup.h>

#include "prom.h"
#include "irq.h"

struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */

int leondebug_irq_disable;
int leon_debug_irqout;
static int dummy_master_l10_counter;
unsigned long amba_system_id;
static DEFINE_SPINLOCK(leon_irq_lock);

unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
int leon3_ticker_irq; /* Timer ticker IRQ */
unsigned int sparc_leon_eirq;
#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
#define LEON_IACK (&leon3_irqctrl_regs->iclear)
#define LEON_DO_ACK_HW 1

/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
 * been (automatically) ACKed when the CPU takes the trap.
 */
static inline unsigned int leon_eirq_get(int cpu)
{
	return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
}

/* Handle one or multiple IRQs from the extended interrupt controller */
static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
{
	unsigned int eirq;
	int cpu = sparc_leon3_cpuid();

	eirq = leon_eirq_get(cpu);
	if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
		generic_handle_irq(irq_map[eirq]->irq);
}

/* The extended IRQ controller has been found, this function registers it */
void leon_eirq_setup(unsigned int eirq)
{
	unsigned long mask, oldmask;
	unsigned int veirq;

	if (eirq < 1 || eirq > 0xf) {
		printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
		return;
	}

	veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);

	/*
	 * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
	 * controller have a mask-bit of their own, so this is safe.
	 */
	irq_link(veirq);
	mask = 1 << eirq;
	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask));
	sparc_leon_eirq = eirq;
}

static inline unsigned long get_irqmask(unsigned int irq)
{
	unsigned long mask;

	if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
	    || ((irq > 0x1f) && sparc_leon_eirq)) {
		printk(KERN_ERR
		       "leon_get_irqmask: false irq number: %d\n", irq);
		mask = 0;
	} else {
		mask = LEON_HARD_INT(irq);
	}
	return mask;
}

#ifdef CONFIG_SMP
static int irq_choose_cpu(const struct cpumask *affinity)
{
	cpumask_t mask;

	cpus_and(mask, cpu_online_map, *affinity);
	if (cpus_equal(mask, cpu_online_map) || cpus_empty(mask))
		return boot_cpu_id;
	else
		return first_cpu(mask);
}
#else
#define irq_choose_cpu(affinity) boot_cpu_id
#endif

static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest,
			     bool force)
{
	unsigned long mask, oldmask, flags;
	int oldcpu, newcpu;

	mask = (unsigned long)data->chip_data;
	oldcpu = irq_choose_cpu(data->affinity);
	newcpu = irq_choose_cpu(dest);

	if (oldcpu == newcpu)
		goto out;

	/* unmask on old CPU first before enabling on the selected CPU */
	spin_lock_irqsave(&leon_irq_lock, flags);
	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask));
	spin_unlock_irqrestore(&leon_irq_lock, flags);
out:
	return IRQ_SET_MASK_OK;
}

static void leon_unmask_irq(struct irq_data *data)
{
	unsigned long mask, oldmask, flags;
	int cpu;

	mask = (unsigned long)data->chip_data;
	cpu = irq_choose_cpu(data->affinity);
	spin_lock_irqsave(&leon_irq_lock, flags);
	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask));
	spin_unlock_irqrestore(&leon_irq_lock, flags);
}

static void leon_mask_irq(struct irq_data *data)
{
	unsigned long mask, oldmask, flags;
	int cpu;

	mask = (unsigned long)data->chip_data;
	cpu = irq_choose_cpu(data->affinity);
	spin_lock_irqsave(&leon_irq_lock, flags);
	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
	spin_unlock_irqrestore(&leon_irq_lock, flags);
}

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

static void leon_shutdown_irq(struct irq_data *data)
{
	leon_mask_irq(data);
	irq_unlink(data->irq);
}

/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
static void leon_eoi_irq(struct irq_data *data)
{
	unsigned long mask = (unsigned long)data->chip_data;

	if (mask & LEON_DO_ACK_HW)
		LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
}

static struct irq_chip leon_irq = {
	.name			= "leon",
	.irq_startup		= leon_startup_irq,
	.irq_shutdown		= leon_shutdown_irq,
	.irq_mask		= leon_mask_irq,
	.irq_unmask		= leon_unmask_irq,
	.irq_eoi		= leon_eoi_irq,
	.irq_set_affinity	= leon_set_affinity,
};

/*
 * Build a LEON IRQ for the edge triggered LEON IRQ controller:
 *  Edge (normal) IRQ           - handle_simple_irq, ack=DONT-CARE, never ack
 *  Level IRQ (PCI|Level-GPIO)  - handle_fasteoi_irq, ack=1, ack after ISR
 *  Per-CPU Edge                - handle_percpu_irq, ack=0
 */
unsigned int leon_build_device_irq(unsigned int real_irq,
				    irq_flow_handler_t flow_handler,
				    const char *name, int do_ack)
{
	unsigned int irq;
	unsigned long mask;

	irq = 0;
	mask = get_irqmask(real_irq);
	if (mask == 0)
		goto out;

	irq = irq_alloc(real_irq, real_irq);
	if (irq == 0)
		goto out;

	if (do_ack)
		mask |= LEON_DO_ACK_HW;

	irq_set_chip_and_handler_name(irq, &leon_irq,
				      flow_handler, name);
	irq_set_chip_data(irq, (void *)mask);

out:
	return irq;
}

static unsigned int _leon_build_device_irq(struct platform_device *op,
					   unsigned int real_irq)
{
	return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
}

void __init leon_init_timers(irq_handler_t counter_fn)
{
	int irq, eirq;
	struct device_node *rootnp, *np, *nnp;
	struct property *pp;
	int len;
	int icsel;
	int ampopts;
	int err;

	leondebug_irq_disable = 0;
	leon_debug_irqout = 0;
	master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
	dummy_master_l10_counter = 0;

	rootnp = of_find_node_by_path("/ambapp0");
	if (!rootnp)
		goto bad;

	/* Find System ID: GRLIB build ID and optional CHIP ID */
	pp = of_find_property(rootnp, "systemid", &len);
	if (pp)
		amba_system_id = *(unsigned long *)pp->value;

	/* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
	np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
	if (!np) {
		np = of_find_node_by_name(rootnp, "01_00d");
		if (!np)
			goto bad;
	}
	pp = of_find_property(np, "reg", &len);
	if (!pp)
		goto bad;
	leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;

	/* Find GPTIMER Timer Registers base address otherwise bail out. */
	nnp = rootnp;
	do {
		np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
		if (!np) {
			np = of_find_node_by_name(nnp, "01_011");
			if (!np)
				goto bad;
		}

		ampopts = 0;
		pp = of_find_property(np, "ampopts", &len);
		if (pp) {
			ampopts = *(int *)pp->value;
			if (ampopts == 0) {
				/* Skip this instance, resource already
				 * allocated by other OS */
				nnp = np;
				continue;
			}
		}

		/* Select Timer-Instance on Timer Core. Default is zero */
		leon3_gptimer_idx = ampopts & 0x7;

		pp = of_find_property(np, "reg", &len);
		if (pp)
			leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
						pp->value;
		pp = of_find_property(np, "interrupts", &len);
		if (pp)
			leon3_gptimer_irq = *(unsigned int *)pp->value;
	} while (0);

	if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
		goto bad;

	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
				(((1000000 / HZ) - 1)));
	LEON3_BYPASS_STORE_PA(
			&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);

#ifdef CONFIG_SMP
	leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;

	if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
	      (1<<LEON3_GPTIMER_SEPIRQ))) {
		printk(KERN_ERR "timer not configured with separate irqs\n");
		BUG();
	}

	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
				0);
	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
				(((1000000/HZ) - 1)));
	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
				0);
#endif

	/*
	 * The IRQ controller may (if implemented) consist of multiple
	 * IRQ controllers, each mapped on a 4Kb boundary.
	 * Each CPU may be routed to different IRQCTRLs, however
	 * we assume that all CPUs (in SMP system) is routed to the
	 * same IRQ Controller, and for non-SMP only one IRQCTRL is
	 * accessed anyway.
	 * In AMP systems, Linux must run on CPU0 for the time being.
	 */
	icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
	icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
	leon3_irqctrl_regs += icsel;

	/* Mask all IRQs on boot-cpu IRQ controller */
	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);

	/* Probe extended IRQ controller */
	eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
		>> 16) & 0xf;
	if (eirq != 0)
		leon_eirq_setup(eirq);

	irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
	if (err) {
		printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
		prom_halt();
	}

	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
			      LEON3_GPTIMER_EN |
			      LEON3_GPTIMER_RL |
			      LEON3_GPTIMER_LD |
			      LEON3_GPTIMER_IRQEN);

#ifdef CONFIG_SMP
	/* Install per-cpu IRQ handler for broadcasted ticker */
	irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
				    "per-cpu", 0);
	err = request_irq(irq, leon_percpu_timer_interrupt,
			  IRQF_PERCPU | IRQF_TIMER, "ticker",
			  NULL);
	if (err) {
		printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
		prom_halt();
	}

	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
			      LEON3_GPTIMER_EN |
			      LEON3_GPTIMER_RL |
			      LEON3_GPTIMER_LD |
			      LEON3_GPTIMER_IRQEN);
#endif
	return;
bad:
	printk(KERN_ERR "No Timer/irqctrl found\n");
	BUG();
	return;
}

void leon_clear_clock_irq(void)
{
}

void leon_load_profile_irq(int cpu, unsigned int limit)
{
	BUG();
}

void __init leon_trans_init(struct device_node *dp)
{
	if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
		struct property *p;
		p = of_find_property(dp, "mid", (void *)0);
		if (p) {
			int mid;
			dp->name = prom_early_alloc(5 + 1);
			memcpy(&mid, p->value, p->length);
			sprintf((char *)dp->name, "cpu%.2d", mid);
		}
	}
}

void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;

void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
{
	if (prom_amba_init &&
	    strcmp(dp->type, "ambapp") == 0 &&
	    strcmp(dp->name, "ambapp0") == 0) {
		prom_amba_init(dp, nextp);
	}
}

#ifdef CONFIG_SMP

void leon_set_cpu_int(int cpu, int level)
{
	unsigned long mask;
	mask = get_irqmask(level);
	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
}

static void leon_clear_ipi(int cpu, int level)
{
	unsigned long mask;
	mask = get_irqmask(level);
	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
}

static void leon_set_udt(int cpu)
{
}

void leon_clear_profile_irq(int cpu)
{
}

void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
{
	unsigned long mask, flags, *addr;
	mask = get_irqmask(irq_nr);
	spin_lock_irqsave(&leon_irq_lock, flags);
	addr = (unsigned long *)LEON_IMASK(cpu);
	LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
	spin_unlock_irqrestore(&leon_irq_lock, flags);
}

#endif

void __init leon_init_IRQ(void)
{
	sparc_irq_config.init_timers      = leon_init_timers;
	sparc_irq_config.build_device_irq = _leon_build_device_irq;

	BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
			BTFIXUPCALL_NORM);
	BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
			BTFIXUPCALL_NOP);

#ifdef CONFIG_SMP
	BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
	BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
	BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
#endif

}

void __init leon_init(void)
{
	of_pdt_build_more = &leon_node_init;
}
Commit	Line	Data
5213a780 KE	1	/*
	2	* Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
	3	* Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
	4	*/
	5
	6	#include <linux/kernel.h>
	7	#include <linux/module.h>
	8	#include <linux/errno.h>
	9	#include <linux/mutex.h>
5213a780 KE	10	#include <linux/of.h>
	11	#include <linux/of_platform.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/of_device.h>
8401707f	14
5213a780 KE	15	#include <asm/oplib.h>
	16	#include <asm/timer.h>
	17	#include <asm/prom.h>
	18	#include <asm/leon.h>
	19	#include <asm/leon_amba.h>
8401707f KE	20	#include <asm/traps.h>
8401707f KE	21	#include <asm/cacheflush.h>
4c6773c3	22	#include <asm/smp.h>
01dae0f0	23	#include <asm/setup.h>
5213a780 KE	24
	25	#include "prom.h"
	26	#include "irq.h"
	27
53aea7ca DH	28	struct leon3_irqctrl_regs_map leon3_irqctrl_regs; / interrupt controller base address */
53aea7ca DH	29	struct leon3_gptimer_regs_map leon3_gptimer_regs; / timer controller base address */
5213a780 KE	30
	31	int leondebug_irq_disable;
	32	int leon_debug_irqout;
	33	static int dummy_master_l10_counter;
7279b82c	34	unsigned long amba_system_id;
d61a38b2	35	static DEFINE_SPINLOCK(leon_irq_lock);
5213a780	36
53aea7ca	37	unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
2791c1a4	38	unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
2cf95304	39	int leon3_ticker_irq; /* Timer ticker IRQ */
5213a780	40	unsigned int sparc_leon_eirq;
a481b5d0	41	#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
4c6773c3 DH	42	#define LEON_IACK (&leon3_irqctrl_regs->iclear)
4c6773c3 DH	43	#define LEON_DO_ACK_HW 1
5213a780	44
4c6773c3 DH	45	/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
	46	* been (automatically) ACKed when the CPU takes the trap.
	47	*/
	48	static inline unsigned int leon_eirq_get(int cpu)
5213a780 KE	49	{
	50	return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
	51	}
	52
4c6773c3 DH	53	/* Handle one or multiple IRQs from the extended interrupt controller */
4c6773c3 DH	54	static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
5213a780	55	{
4c6773c3	56	unsigned int eirq;
01dae0f0	57	int cpu = sparc_leon3_cpuid();
4c6773c3 DH	58
	59	eirq = leon_eirq_get(cpu);
	60	if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
	61	generic_handle_irq(irq_map[eirq]->irq);
5213a780 KE	62	}
	63
	64	/* The extended IRQ controller has been found, this function registers it */
4c6773c3	65	void leon_eirq_setup(unsigned int eirq)
5213a780	66	{
4c6773c3 DH	67	unsigned long mask, oldmask;
4c6773c3 DH	68	unsigned int veirq;
5213a780	69
4c6773c3 DH	70	if (eirq < 1 \|\| eirq > 0xf) {
	71	printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
	72	return;
5213a780 KE	73	}
5213a780 KE	74
4c6773c3 DH	75	veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
	76
	77	/*
	78	* Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
	79	* controller have a mask-bit of their own, so this is safe.
	80	*/
	81	irq_link(veirq);
	82	mask = 1 << eirq;
01dae0f0 DH	83	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
01dae0f0 DH	84	LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask \| mask));
4c6773c3	85	sparc_leon_eirq = eirq;
5213a780 KE	86	}
	87
	88	static inline unsigned long get_irqmask(unsigned int irq)
	89	{
	90	unsigned long mask;
	91
	92	if (!irq \|\| ((irq > 0xf) && !sparc_leon_eirq)
	93	\|\| ((irq > 0x1f) && sparc_leon_eirq)) {
	94	printk(KERN_ERR
	95	"leon_get_irqmask: false irq number: %d\n", irq);
	96	mask = 0;
	97	} else {
	98	mask = LEON_HARD_INT(irq);
	99	}
	100	return mask;
	101	}
	102
5eb1f4fc DH	103	#ifdef CONFIG_SMP
	104	static int irq_choose_cpu(const struct cpumask *affinity)
	105	{
	106	cpumask_t mask;
	107
	108	cpus_and(mask, cpu_online_map, *affinity);
	109	if (cpus_equal(mask, cpu_online_map) \|\| cpus_empty(mask))
01dae0f0	110	return boot_cpu_id;
5eb1f4fc DH	111	else
	112	return first_cpu(mask);
	113	}
	114	#else
01dae0f0	115	#define irq_choose_cpu(affinity) boot_cpu_id
5eb1f4fc DH	116	#endif
	117
	118	static int leon_set_affinity(struct irq_data data, const struct cpumask dest,
	119	bool force)
	120	{
	121	unsigned long mask, oldmask, flags;
	122	int oldcpu, newcpu;
	123
	124	mask = (unsigned long)data->chip_data;
	125	oldcpu = irq_choose_cpu(data->affinity);
	126	newcpu = irq_choose_cpu(dest);
	127
	128	if (oldcpu == newcpu)
	129	goto out;
	130
	131	/* unmask on old CPU first before enabling on the selected CPU */
	132	spin_lock_irqsave(&leon_irq_lock, flags);
	133	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
	134	LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
	135	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
	136	LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask \| mask));
	137	spin_unlock_irqrestore(&leon_irq_lock, flags);
	138	out:
	139	return IRQ_SET_MASK_OK;
	140	}
	141
6baa9b20	142	static void leon_unmask_irq(struct irq_data *data)
5213a780	143	{
a481b5d0	144	unsigned long mask, oldmask, flags;
5eb1f4fc	145	int cpu;
6baa9b20 SR	146
6baa9b20 SR	147	mask = (unsigned long)data->chip_data;
5eb1f4fc	148	cpu = irq_choose_cpu(data->affinity);
d61a38b2	149	spin_lock_irqsave(&leon_irq_lock, flags);
5eb1f4fc DH	150	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
5eb1f4fc DH	151	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask \| mask));
d61a38b2	152	spin_unlock_irqrestore(&leon_irq_lock, flags);
5213a780 KE	153	}
5213a780 KE	154
6baa9b20	155	static void leon_mask_irq(struct irq_data *data)
5213a780	156	{
a481b5d0	157	unsigned long mask, oldmask, flags;
5eb1f4fc	158	int cpu;
6baa9b20 SR	159
6baa9b20 SR	160	mask = (unsigned long)data->chip_data;
5eb1f4fc	161	cpu = irq_choose_cpu(data->affinity);
d61a38b2	162	spin_lock_irqsave(&leon_irq_lock, flags);
5eb1f4fc DH	163	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
5eb1f4fc DH	164	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
d61a38b2	165	spin_unlock_irqrestore(&leon_irq_lock, flags);
5213a780 KE	166	}
5213a780 KE	167
6baa9b20 SR	168	static unsigned int leon_startup_irq(struct irq_data *data)
	169	{
	170	irq_link(data->irq);
	171	leon_unmask_irq(data);
	172	return 0;
	173	}
	174
	175	static void leon_shutdown_irq(struct irq_data *data)
	176	{
	177	leon_mask_irq(data);
	178	irq_unlink(data->irq);
	179	}
	180
4c6773c3 DH	181	/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
	182	static void leon_eoi_irq(struct irq_data *data)
	183	{
	184	unsigned long mask = (unsigned long)data->chip_data;
	185
	186	if (mask & LEON_DO_ACK_HW)
	187	LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
	188	}
	189
6baa9b20	190	static struct irq_chip leon_irq = {
5eb1f4fc DH	191	.name = "leon",
	192	.irq_startup = leon_startup_irq,
	193	.irq_shutdown = leon_shutdown_irq,
	194	.irq_mask = leon_mask_irq,
	195	.irq_unmask = leon_unmask_irq,
	196	.irq_eoi = leon_eoi_irq,
	197	.irq_set_affinity = leon_set_affinity,
6baa9b20 SR	198	};
6baa9b20 SR	199
4c6773c3 DH	200	/*
	201	* Build a LEON IRQ for the edge triggered LEON IRQ controller:
	202	* Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack
	203	* Level IRQ (PCI\|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
	204	* Per-CPU Edge - handle_percpu_irq, ack=0
	205	*/
	206	unsigned int leon_build_device_irq(unsigned int real_irq,
	207	irq_flow_handler_t flow_handler,
	208	const char *name, int do_ack)
6baa9b20 SR	209	{
	210	unsigned int irq;
	211	unsigned long mask;
	212
	213	irq = 0;
	214	mask = get_irqmask(real_irq);
	215	if (mask == 0)
	216	goto out;
	217
	218	irq = irq_alloc(real_irq, real_irq);
	219	if (irq == 0)
	220	goto out;
	221
4c6773c3 DH	222	if (do_ack)
	223	mask \|= LEON_DO_ACK_HW;
	224
6baa9b20	225	irq_set_chip_and_handler_name(irq, &leon_irq,
4c6773c3	226	flow_handler, name);
6baa9b20 SR	227	irq_set_chip_data(irq, (void *)mask);
	228
	229	out:
	230	return irq;
	231	}
	232
4c6773c3 DH	233	static unsigned int _leon_build_device_irq(struct platform_device *op,
	234	unsigned int real_irq)
	235	{
	236	return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
	237	}
	238
5213a780 KE	239	void __init leon_init_timers(irq_handler_t counter_fn)
5213a780 KE	240	{
4c6773c3	241	int irq, eirq;
2791c1a4	242	struct device_node rootnp, np, *nnp;
53aea7ca DH	243	struct property *pp;
53aea7ca DH	244	int len;
01dae0f0	245	int icsel;
2791c1a4	246	int ampopts;
6baa9b20	247	int err;
5213a780 KE	248
	249	leondebug_irq_disable = 0;
	250	leon_debug_irqout = 0;
	251	master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
	252	dummy_master_l10_counter = 0;
	253
53aea7ca DH	254	rootnp = of_find_node_by_path("/ambapp0");
	255	if (!rootnp)
	256	goto bad;
7279b82c DH	257
	258	/* Find System ID: GRLIB build ID and optional CHIP ID */
	259	pp = of_find_property(rootnp, "systemid", &len);
	260	if (pp)
	261	amba_system_id = (unsigned long )pp->value;
	262
	263	/* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
53aea7ca	264	np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
9742e72c DH	265	if (!np) {
	266	np = of_find_node_by_name(rootnp, "01_00d");
	267	if (!np)
	268	goto bad;
	269	}
53aea7ca DH	270	pp = of_find_property(np, "reg", &len);
	271	if (!pp)
	272	goto bad;
	273	leon3_irqctrl_regs = (struct leon3_irqctrl_regs_map *)pp->value;
	274
	275	/* Find GPTIMER Timer Registers base address otherwise bail out. */
2791c1a4 DH	276	nnp = rootnp;
	277	do {
	278	np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
	279	if (!np) {
	280	np = of_find_node_by_name(nnp, "01_011");
	281	if (!np)
	282	goto bad;
	283	}
	284
	285	ampopts = 0;
	286	pp = of_find_property(np, "ampopts", &len);
	287	if (pp) {
	288	ampopts = (int )pp->value;
	289	if (ampopts == 0) {
	290	/* Skip this instance, resource already
	291	* allocated by other OS */
	292	nnp = np;
	293	continue;
	294	}
	295	}
	296
	297	/* Select Timer-Instance on Timer Core. Default is zero */
	298	leon3_gptimer_idx = ampopts & 0x7;
	299
	300	pp = of_find_property(np, "reg", &len);
	301	if (pp)
	302	leon3_gptimer_regs = (struct leon3_gptimer_regs_map *)
	303	pp->value;
	304	pp = of_find_property(np, "interrupts", &len);
	305	if (pp)
	306	leon3_gptimer_irq = (unsigned int )pp->value;
	307	} while (0);
53aea7ca	308
a481b5d0 DH	309	if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
	310	goto bad;
	311
	312	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
	313	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
	314	(((1000000 / HZ) - 1)));
	315	LEON3_BYPASS_STORE_PA(
2791c1a4	316	&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
5213a780	317
8401707f	318	#ifdef CONFIG_SMP
a481b5d0	319	leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
8401707f	320
a481b5d0 DH	321	if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
	322	(1<<LEON3_GPTIMER_SEPIRQ))) {
	323	printk(KERN_ERR "timer not configured with separate irqs\n");
	324	BUG();
5213a780 KE	325	}
5213a780 KE	326
a481b5d0 DH	327	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
	328	0);
	329	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
	330	(((1000000/HZ) - 1)));
	331	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
	332	0);
	333	#endif
	334
	335	/*
	336	* The IRQ controller may (if implemented) consist of multiple
	337	* IRQ controllers, each mapped on a 4Kb boundary.
	338	* Each CPU may be routed to different IRQCTRLs, however
	339	* we assume that all CPUs (in SMP system) is routed to the
	340	* same IRQ Controller, and for non-SMP only one IRQCTRL is
	341	* accessed anyway.
	342	* In AMP systems, Linux must run on CPU0 for the time being.
	343	*/
01dae0f0 DH	344	icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
01dae0f0 DH	345	icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
a481b5d0 DH	346	leon3_irqctrl_regs += icsel;
a481b5d0 DH	347
970def65 DH	348	/* Mask all IRQs on boot-cpu IRQ controller */
	349	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);
	350
a481b5d0 DH	351	/* Probe extended IRQ controller */
	352	eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
	353	>> 16) & 0xf;
	354	if (eirq != 0)
	355	leon_eirq_setup(eirq);
	356
4c6773c3	357	irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
6baa9b20	358	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
6baa9b20	359	if (err) {
a481b5d0	360	printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
5213a780 KE	361	prom_halt();
	362	}
	363
a481b5d0 DH	364	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
	365	LEON3_GPTIMER_EN \|
	366	LEON3_GPTIMER_RL \|
	367	LEON3_GPTIMER_LD \|
	368	LEON3_GPTIMER_IRQEN);
8401707f KE	369
8401707f KE	370	#ifdef CONFIG_SMP
a481b5d0 DH	371	/* Install per-cpu IRQ handler for broadcasted ticker */
	372	irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
	373	"per-cpu", 0);
	374	err = request_irq(irq, leon_percpu_timer_interrupt,
	375	IRQF_PERCPU \| IRQF_TIMER, "ticker",
	376	NULL);
	377	if (err) {
	378	printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
	379	prom_halt();
	380	}
2cf95304	381
a481b5d0 DH	382	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
	383	LEON3_GPTIMER_EN \|
	384	LEON3_GPTIMER_RL \|
	385	LEON3_GPTIMER_LD \|
	386	LEON3_GPTIMER_IRQEN);
8401707f	387	#endif
53aea7ca DH	388	return;
	389	bad:
	390	printk(KERN_ERR "No Timer/irqctrl found\n");
	391	BUG();
	392	return;
5213a780 KE	393	}
	394
	395	void leon_clear_clock_irq(void)
	396	{
	397	}
	398
	399	void leon_load_profile_irq(int cpu, unsigned int limit)
	400	{
	401	BUG();
	402	}
	403
5213a780 KE	404	void __init leon_trans_init(struct device_node *dp)
	405	{
	406	if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
	407	struct property *p;
	408	p = of_find_property(dp, "mid", (void *)0);
	409	if (p) {
	410	int mid;
	411	dp->name = prom_early_alloc(5 + 1);
	412	memcpy(&mid, p->value, p->length);
	413	sprintf((char *)dp->name, "cpu%.2d", mid);
	414	}
	415	}
	416	}
	417
	418	void __initdata (prom_amba_init)(struct device_node dp, struct device_node ***nextp) = 0;
	419
	420	void __init leon_node_init(struct device_node dp, struct device_node **nextp)
	421	{
	422	if (prom_amba_init &&
	423	strcmp(dp->type, "ambapp") == 0 &&
	424	strcmp(dp->name, "ambapp0") == 0) {
	425	prom_amba_init(dp, nextp);
	426	}
	427	}
	428
8401707f KE	429	#ifdef CONFIG_SMP
	430
	431	void leon_set_cpu_int(int cpu, int level)
	432	{
	433	unsigned long mask;
	434	mask = get_irqmask(level);
	435	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
	436	}
	437
	438	static void leon_clear_ipi(int cpu, int level)
	439	{
	440	unsigned long mask;
	441	mask = get_irqmask(level);
	442	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
	443	}
	444
	445	static void leon_set_udt(int cpu)
	446	{
	447	}
	448
	449	void leon_clear_profile_irq(int cpu)
	450	{
	451	}
	452
	453	void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
	454	{
	455	unsigned long mask, flags, *addr;
	456	mask = get_irqmask(irq_nr);
d61a38b2	457	spin_lock_irqsave(&leon_irq_lock, flags);
a481b5d0 DH	458	addr = (unsigned long *)LEON_IMASK(cpu);
a481b5d0 DH	459	LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) \| mask));
d61a38b2	460	spin_unlock_irqrestore(&leon_irq_lock, flags);
8401707f KE	461	}
	462
	463	#endif
	464
5213a780 KE	465	void __init leon_init_IRQ(void)
5213a780 KE	466	{
6baa9b20	467	sparc_irq_config.init_timers = leon_init_timers;
4c6773c3	468	sparc_irq_config.build_device_irq = _leon_build_device_irq;
5213a780 KE	469
	470	BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
	471	BTFIXUPCALL_NORM);
	472	BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
	473	BTFIXUPCALL_NOP);
	474
	475	#ifdef CONFIG_SMP
	476	BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
	477	BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
	478	BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
	479	#endif
	480
	481	}
	482
	483	void __init leon_init(void)
	484	{
ed418502	485	of_pdt_build_more = &leon_node_init;
5213a780	486	}