/*
* Based on arch/arm/include/asm/pmu.h
*
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
* Copyright (C) 2012 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_PMU_H
#define __ASM_PMU_H

#ifdef CONFIG_HW_PERF_EVENTS

/* The events for a given PMU register set. */
struct pmu_hw_events {
/*
* The events that are active on the PMU for the given index.
*/
struct perf_event **events;

/*
* A 1 bit for an index indicates that the counter is being used for
* an event. A 0 means that the counter can be used.
*/
unsigned long *used_mask;

/*
* Hardware lock to serialize accesses to PMU registers. Needed for the
* read/modify/write sequences.
*/
raw_spinlock_t pmu_lock;
};

struct arm_pmu {
struct pmu pmu;
cpumask_t active_irqs;
const char *name;
irqreturn_t (*handle_irq)(int irq_num, void *dev);
void (*enable)(struct hw_perf_event *evt, int idx);
void (*disable)(struct hw_perf_event *evt, int idx);
int (*get_event_idx)(struct pmu_hw_events *hw_events,
struct hw_perf_event *hwc);
int (*set_event_filter)(struct hw_perf_event *evt,
struct perf_event_attr *attr);
u32 (*read_counter)(int idx);
void (*write_counter)(int idx, u32 val);
void (*start)(void);
void (*stop)(void);
void (*reset)(void *);
int (*map_event)(struct perf_event *event);
int num_events;
atomic_t active_events;
struct mutex reserve_mutex;
u64 max_period;
struct platform_device *plat_device;
struct pmu_hw_events *(*get_hw_events)(void);
};

#define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu))

int __init armpmu_register(struct arm_pmu *armpmu, char *name, int type);

u64 armpmu_event_update(struct perf_event *event,
struct hw_perf_event *hwc,
int idx);

int armpmu_event_set_period(struct perf_event *event,
struct hw_perf_event *hwc,
int idx);

#endif /* CONFIG_HW_PERF_EVENTS */
#endif /* __ASM_PMU_H */