[deliverable/linux.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 "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 = hard_smp_processor_id();

	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(0));
	LEON3_BYPASS_STORE_PA(LEON_IMASK(0), (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 0;
	else
		return first_cpu(mask);
}
#else
#define irq_choose_cpu(affinity) 0
#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 cpu, 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.
	 */
	cpu = sparc_leon3_cpuid();
	icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
	icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
	leon3_irqctrl_regs += icsel;

	/* 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>
5213a780 KE	23
	24	#include "prom.h"
	25	#include "irq.h"
	26
53aea7ca DH	27	struct leon3_irqctrl_regs_map leon3_irqctrl_regs; / interrupt controller base address */
53aea7ca DH	28	struct leon3_gptimer_regs_map leon3_gptimer_regs; / timer controller base address */
5213a780 KE	29
	30	int leondebug_irq_disable;
	31	int leon_debug_irqout;
	32	static int dummy_master_l10_counter;
7279b82c	33	unsigned long amba_system_id;
d61a38b2	34	static DEFINE_SPINLOCK(leon_irq_lock);
5213a780	35
53aea7ca	36	unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
2791c1a4	37	unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
2cf95304	38	int leon3_ticker_irq; /* Timer ticker IRQ */
5213a780	39	unsigned int sparc_leon_eirq;
a481b5d0	40	#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
4c6773c3 DH	41	#define LEON_IACK (&leon3_irqctrl_regs->iclear)
4c6773c3 DH	42	#define LEON_DO_ACK_HW 1
5213a780	43
4c6773c3 DH	44	/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
	45	* been (automatically) ACKed when the CPU takes the trap.
	46	*/
	47	static inline unsigned int leon_eirq_get(int cpu)
5213a780 KE	48	{
	49	return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
	50	}
	51
4c6773c3 DH	52	/* Handle one or multiple IRQs from the extended interrupt controller */
4c6773c3 DH	53	static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
5213a780	54	{
4c6773c3 DH	55	unsigned int eirq;
	56	int cpu = hard_smp_processor_id();
	57
	58	eirq = leon_eirq_get(cpu);
	59	if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
	60	generic_handle_irq(irq_map[eirq]->irq);
5213a780 KE	61	}
	62
	63	/* The extended IRQ controller has been found, this function registers it */
4c6773c3	64	void leon_eirq_setup(unsigned int eirq)
5213a780	65	{
4c6773c3 DH	66	unsigned long mask, oldmask;
4c6773c3 DH	67	unsigned int veirq;
5213a780	68
4c6773c3 DH	69	if (eirq < 1 \|\| eirq > 0xf) {
	70	printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
	71	return;
5213a780 KE	72	}
5213a780 KE	73
4c6773c3 DH	74	veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
	75
	76	/*
	77	* Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
	78	* controller have a mask-bit of their own, so this is safe.
	79	*/
	80	irq_link(veirq);
	81	mask = 1 << eirq;
a481b5d0 DH	82	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(0));
a481b5d0 DH	83	LEON3_BYPASS_STORE_PA(LEON_IMASK(0), (oldmask \| mask));
4c6773c3	84	sparc_leon_eirq = eirq;
5213a780 KE	85	}
	86
	87	static inline unsigned long get_irqmask(unsigned int irq)
	88	{
	89	unsigned long mask;
	90
	91	if (!irq \|\| ((irq > 0xf) && !sparc_leon_eirq)
	92	\|\| ((irq > 0x1f) && sparc_leon_eirq)) {
	93	printk(KERN_ERR
	94	"leon_get_irqmask: false irq number: %d\n", irq);
	95	mask = 0;
	96	} else {
	97	mask = LEON_HARD_INT(irq);
	98	}
	99	return mask;
	100	}
	101
5eb1f4fc DH	102	#ifdef CONFIG_SMP
	103	static int irq_choose_cpu(const struct cpumask *affinity)
	104	{
	105	cpumask_t mask;
	106
	107	cpus_and(mask, cpu_online_map, *affinity);
	108	if (cpus_equal(mask, cpu_online_map) \|\| cpus_empty(mask))
	109	return 0;
	110	else
	111	return first_cpu(mask);
	112	}
	113	#else
	114	#define irq_choose_cpu(affinity) 0
	115	#endif
	116
	117	static int leon_set_affinity(struct irq_data data, const struct cpumask dest,
	118	bool force)
	119	{
	120	unsigned long mask, oldmask, flags;
	121	int oldcpu, newcpu;
	122
	123	mask = (unsigned long)data->chip_data;
	124	oldcpu = irq_choose_cpu(data->affinity);
	125	newcpu = irq_choose_cpu(dest);
	126
	127	if (oldcpu == newcpu)
	128	goto out;
	129
	130	/* unmask on old CPU first before enabling on the selected CPU */
	131	spin_lock_irqsave(&leon_irq_lock, flags);
	132	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
	133	LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
	134	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
	135	LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask \| mask));
	136	spin_unlock_irqrestore(&leon_irq_lock, flags);
	137	out:
	138	return IRQ_SET_MASK_OK;
	139	}
	140
6baa9b20	141	static void leon_unmask_irq(struct irq_data *data)
5213a780	142	{
a481b5d0	143	unsigned long mask, oldmask, flags;
5eb1f4fc	144	int cpu;
6baa9b20 SR	145
6baa9b20 SR	146	mask = (unsigned long)data->chip_data;
5eb1f4fc	147	cpu = irq_choose_cpu(data->affinity);
d61a38b2	148	spin_lock_irqsave(&leon_irq_lock, flags);
5eb1f4fc DH	149	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
5eb1f4fc DH	150	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask \| mask));
d61a38b2	151	spin_unlock_irqrestore(&leon_irq_lock, flags);
5213a780 KE	152	}
5213a780 KE	153
6baa9b20	154	static void leon_mask_irq(struct irq_data *data)
5213a780	155	{
a481b5d0	156	unsigned long mask, oldmask, flags;
5eb1f4fc	157	int cpu;
6baa9b20 SR	158
6baa9b20 SR	159	mask = (unsigned long)data->chip_data;
5eb1f4fc	160	cpu = irq_choose_cpu(data->affinity);
d61a38b2	161	spin_lock_irqsave(&leon_irq_lock, flags);
5eb1f4fc DH	162	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
5eb1f4fc DH	163	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
d61a38b2	164	spin_unlock_irqrestore(&leon_irq_lock, flags);
5213a780 KE	165	}
5213a780 KE	166
6baa9b20 SR	167	static unsigned int leon_startup_irq(struct irq_data *data)
	168	{
	169	irq_link(data->irq);
	170	leon_unmask_irq(data);
	171	return 0;
	172	}
	173
	174	static void leon_shutdown_irq(struct irq_data *data)
	175	{
	176	leon_mask_irq(data);
	177	irq_unlink(data->irq);
	178	}
	179
4c6773c3 DH	180	/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
	181	static void leon_eoi_irq(struct irq_data *data)
	182	{
	183	unsigned long mask = (unsigned long)data->chip_data;
	184
	185	if (mask & LEON_DO_ACK_HW)
	186	LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
	187	}
	188
6baa9b20	189	static struct irq_chip leon_irq = {
5eb1f4fc DH	190	.name = "leon",
	191	.irq_startup = leon_startup_irq,
	192	.irq_shutdown = leon_shutdown_irq,
	193	.irq_mask = leon_mask_irq,
	194	.irq_unmask = leon_unmask_irq,
	195	.irq_eoi = leon_eoi_irq,
	196	.irq_set_affinity = leon_set_affinity,
6baa9b20 SR	197	};
6baa9b20 SR	198
4c6773c3 DH	199	/*
	200	* Build a LEON IRQ for the edge triggered LEON IRQ controller:
	201	* Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack
	202	* Level IRQ (PCI\|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
	203	* Per-CPU Edge - handle_percpu_irq, ack=0
	204	*/
	205	unsigned int leon_build_device_irq(unsigned int real_irq,
	206	irq_flow_handler_t flow_handler,
	207	const char *name, int do_ack)
6baa9b20 SR	208	{
	209	unsigned int irq;
	210	unsigned long mask;
	211
	212	irq = 0;
	213	mask = get_irqmask(real_irq);
	214	if (mask == 0)
	215	goto out;
	216
	217	irq = irq_alloc(real_irq, real_irq);
	218	if (irq == 0)
	219	goto out;
	220
4c6773c3 DH	221	if (do_ack)
	222	mask \|= LEON_DO_ACK_HW;
	223
6baa9b20	224	irq_set_chip_and_handler_name(irq, &leon_irq,
4c6773c3	225	flow_handler, name);
6baa9b20 SR	226	irq_set_chip_data(irq, (void *)mask);
	227
	228	out:
	229	return irq;
	230	}
	231
4c6773c3 DH	232	static unsigned int _leon_build_device_irq(struct platform_device *op,
	233	unsigned int real_irq)
	234	{
	235	return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
	236	}
	237
5213a780 KE	238	void __init leon_init_timers(irq_handler_t counter_fn)
5213a780 KE	239	{
4c6773c3	240	int irq, eirq;
2791c1a4	241	struct device_node rootnp, np, *nnp;
53aea7ca DH	242	struct property *pp;
53aea7ca DH	243	int len;
e2305e37	244	int cpu, icsel;
2791c1a4	245	int ampopts;
6baa9b20	246	int err;
5213a780 KE	247
	248	leondebug_irq_disable = 0;
	249	leon_debug_irqout = 0;
	250	master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
	251	dummy_master_l10_counter = 0;
	252
53aea7ca DH	253	rootnp = of_find_node_by_path("/ambapp0");
	254	if (!rootnp)
	255	goto bad;
7279b82c DH	256
	257	/* Find System ID: GRLIB build ID and optional CHIP ID */
	258	pp = of_find_property(rootnp, "systemid", &len);
	259	if (pp)
	260	amba_system_id = (unsigned long )pp->value;
	261
	262	/* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
53aea7ca	263	np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
9742e72c DH	264	if (!np) {
	265	np = of_find_node_by_name(rootnp, "01_00d");
	266	if (!np)
	267	goto bad;
	268	}
53aea7ca DH	269	pp = of_find_property(np, "reg", &len);
	270	if (!pp)
	271	goto bad;
	272	leon3_irqctrl_regs = (struct leon3_irqctrl_regs_map *)pp->value;
	273
	274	/* Find GPTIMER Timer Registers base address otherwise bail out. */
2791c1a4 DH	275	nnp = rootnp;
	276	do {
	277	np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
	278	if (!np) {
	279	np = of_find_node_by_name(nnp, "01_011");
	280	if (!np)
	281	goto bad;
	282	}
	283
	284	ampopts = 0;
	285	pp = of_find_property(np, "ampopts", &len);
	286	if (pp) {
	287	ampopts = (int )pp->value;
	288	if (ampopts == 0) {
	289	/* Skip this instance, resource already
	290	* allocated by other OS */
	291	nnp = np;
	292	continue;
	293	}
	294	}
	295
	296	/* Select Timer-Instance on Timer Core. Default is zero */
	297	leon3_gptimer_idx = ampopts & 0x7;
	298
	299	pp = of_find_property(np, "reg", &len);
	300	if (pp)
	301	leon3_gptimer_regs = (struct leon3_gptimer_regs_map *)
	302	pp->value;
	303	pp = of_find_property(np, "interrupts", &len);
	304	if (pp)
	305	leon3_gptimer_irq = (unsigned int )pp->value;
	306	} while (0);
53aea7ca	307
a481b5d0 DH	308	if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
	309	goto bad;
	310
	311	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
	312	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
	313	(((1000000 / HZ) - 1)));
	314	LEON3_BYPASS_STORE_PA(
2791c1a4	315	&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
5213a780	316
8401707f	317	#ifdef CONFIG_SMP
a481b5d0	318	leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
8401707f	319
a481b5d0 DH	320	if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
	321	(1<<LEON3_GPTIMER_SEPIRQ))) {
	322	printk(KERN_ERR "timer not configured with separate irqs\n");
	323	BUG();
5213a780 KE	324	}
5213a780 KE	325
a481b5d0 DH	326	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
	327	0);
	328	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
	329	(((1000000/HZ) - 1)));
	330	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
	331	0);
	332	#endif
	333
	334	/*
	335	* The IRQ controller may (if implemented) consist of multiple
	336	* IRQ controllers, each mapped on a 4Kb boundary.
	337	* Each CPU may be routed to different IRQCTRLs, however
	338	* we assume that all CPUs (in SMP system) is routed to the
	339	* same IRQ Controller, and for non-SMP only one IRQCTRL is
	340	* accessed anyway.
	341	* In AMP systems, Linux must run on CPU0 for the time being.
	342	*/
	343	cpu = sparc_leon3_cpuid();
	344	icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
	345	icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
	346	leon3_irqctrl_regs += icsel;
	347
	348	/* Probe extended IRQ controller */
	349	eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
	350	>> 16) & 0xf;
	351	if (eirq != 0)
	352	leon_eirq_setup(eirq);
	353
4c6773c3	354	irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
6baa9b20	355	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
6baa9b20	356	if (err) {
a481b5d0	357	printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
5213a780 KE	358	prom_halt();
	359	}
	360
a481b5d0 DH	361	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
	362	LEON3_GPTIMER_EN \|
	363	LEON3_GPTIMER_RL \|
	364	LEON3_GPTIMER_LD \|
	365	LEON3_GPTIMER_IRQEN);
8401707f KE	366
8401707f KE	367	#ifdef CONFIG_SMP
a481b5d0 DH	368	/* Install per-cpu IRQ handler for broadcasted ticker */
	369	irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
	370	"per-cpu", 0);
	371	err = request_irq(irq, leon_percpu_timer_interrupt,
	372	IRQF_PERCPU \| IRQF_TIMER, "ticker",
	373	NULL);
	374	if (err) {
	375	printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
	376	prom_halt();
	377	}
2cf95304	378
a481b5d0 DH	379	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
	380	LEON3_GPTIMER_EN \|
	381	LEON3_GPTIMER_RL \|
	382	LEON3_GPTIMER_LD \|
	383	LEON3_GPTIMER_IRQEN);
8401707f	384	#endif
53aea7ca DH	385	return;
	386	bad:
	387	printk(KERN_ERR "No Timer/irqctrl found\n");
	388	BUG();
	389	return;
5213a780 KE	390	}
	391
	392	void leon_clear_clock_irq(void)
	393	{
	394	}
	395
	396	void leon_load_profile_irq(int cpu, unsigned int limit)
	397	{
	398	BUG();
	399	}
	400
5213a780 KE	401	void __init leon_trans_init(struct device_node *dp)
	402	{
	403	if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
	404	struct property *p;
	405	p = of_find_property(dp, "mid", (void *)0);
	406	if (p) {
	407	int mid;
	408	dp->name = prom_early_alloc(5 + 1);
	409	memcpy(&mid, p->value, p->length);
	410	sprintf((char *)dp->name, "cpu%.2d", mid);
	411	}
	412	}
	413	}
	414
	415	void __initdata (prom_amba_init)(struct device_node dp, struct device_node ***nextp) = 0;
	416
	417	void __init leon_node_init(struct device_node dp, struct device_node **nextp)
	418	{
	419	if (prom_amba_init &&
	420	strcmp(dp->type, "ambapp") == 0 &&
	421	strcmp(dp->name, "ambapp0") == 0) {
	422	prom_amba_init(dp, nextp);
	423	}
	424	}
	425
8401707f KE	426	#ifdef CONFIG_SMP
	427
	428	void leon_set_cpu_int(int cpu, int level)
	429	{
	430	unsigned long mask;
	431	mask = get_irqmask(level);
	432	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
	433	}
	434
	435	static void leon_clear_ipi(int cpu, int level)
	436	{
	437	unsigned long mask;
	438	mask = get_irqmask(level);
	439	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
	440	}
	441
	442	static void leon_set_udt(int cpu)
	443	{
	444	}
	445
	446	void leon_clear_profile_irq(int cpu)
	447	{
	448	}
	449
	450	void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
	451	{
	452	unsigned long mask, flags, *addr;
	453	mask = get_irqmask(irq_nr);
d61a38b2	454	spin_lock_irqsave(&leon_irq_lock, flags);
a481b5d0 DH	455	addr = (unsigned long *)LEON_IMASK(cpu);
a481b5d0 DH	456	LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) \| mask));
d61a38b2	457	spin_unlock_irqrestore(&leon_irq_lock, flags);
8401707f KE	458	}
	459
	460	#endif
	461
5213a780 KE	462	void __init leon_init_IRQ(void)
5213a780 KE	463	{
6baa9b20	464	sparc_irq_config.init_timers = leon_init_timers;
4c6773c3	465	sparc_irq_config.build_device_irq = _leon_build_device_irq;
5213a780 KE	466
	467	BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
	468	BTFIXUPCALL_NORM);
	469	BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
	470	BTFIXUPCALL_NOP);
	471
	472	#ifdef CONFIG_SMP
	473	BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
	474	BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
	475	BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
	476	#endif
	477
	478	}
	479
	480	void __init leon_init(void)
	481	{
ed418502	482	of_pdt_build_more = &leon_node_init;
5213a780	483	}