2 * linux/arch/arm/include/asm/pmu.h
4 * Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
16 ARM_PMU_DEVICE_CPU = 0,
20 #ifdef CONFIG_CPU_HAS_PMU
28 * reserve_pmu() - reserve the hardware performance counters
30 * Reserve the hardware performance counters in the system for exclusive use.
31 * The 'struct pmu_irqs' for the system is returned on success, ERR_PTR()
32 * encoded error on failure.
34 extern const struct pmu_irqs *
38 * release_pmu() - Relinquish control of the performance counters
40 * Release the performance counters and allow someone else to use them.
41 * Callers must have disabled the counters and released IRQs before calling
42 * this. The 'struct pmu_irqs' returned from reserve_pmu() must be passed as
46 release_pmu(const struct pmu_irqs *irqs);
49 * init_pmu() - Initialise the PMU.
51 * Initialise the system ready for PMU enabling. This should typically set the
52 * IRQ affinity and nothing else. The users (oprofile/perf events etc) will do
53 * the actual hardware initialisation.
58 #else /* CONFIG_CPU_HAS_PMU */
60 static inline const struct pmu_irqs *
63 return ERR_PTR(-ENODEV);
67 release_pmu(const struct pmu_irqs *irqs)
78 #endif /* CONFIG_CPU_HAS_PMU */
80 #endif /* __ARM_PMU_H__ */