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author | John W. Linville <linville@tuxdriver.com> | 2010-04-08 19:34:54 +0200 |
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committer | John W. Linville <linville@tuxdriver.com> | 2010-04-08 19:34:54 +0200 |
commit | 0f2df9eac70423838a1f8d410fd3899ddd88317b (patch) | |
tree | 0617f723320d83eca5cef9c964c001014e74213f /arch/arm/include/asm/pmu.h | |
parent | mac80211: fix paged RX crypto (diff) | |
parent | ath9k: fix double calls to ath_radio_enable (diff) | |
download | linux-0f2df9eac70423838a1f8d410fd3899ddd88317b.tar.xz linux-0f2df9eac70423838a1f8d410fd3899ddd88317b.zip |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into merge
Conflicts:
Documentation/feature-removal-schedule.txt
drivers/net/wireless/ath/ath5k/phy.c
drivers/net/wireless/iwlwifi/iwl-4965.c
drivers/net/wireless/iwlwifi/iwl-agn.c
drivers/net/wireless/iwlwifi/iwl-core.c
drivers/net/wireless/iwlwifi/iwl-core.h
drivers/net/wireless/iwlwifi/iwl-tx.c
Diffstat (limited to 'arch/arm/include/asm/pmu.h')
-rw-r--r-- | arch/arm/include/asm/pmu.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h new file mode 100644 index 000000000000..2829b9f981a1 --- /dev/null +++ b/arch/arm/include/asm/pmu.h @@ -0,0 +1,75 @@ +/* + * linux/arch/arm/include/asm/pmu.h + * + * Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles + * + * 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. + * + */ + +#ifndef __ARM_PMU_H__ +#define __ARM_PMU_H__ + +#ifdef CONFIG_CPU_HAS_PMU + +struct pmu_irqs { + const int *irqs; + int num_irqs; +}; + +/** + * reserve_pmu() - reserve the hardware performance counters + * + * Reserve the hardware performance counters in the system for exclusive use. + * The 'struct pmu_irqs' for the system is returned on success, ERR_PTR() + * encoded error on failure. + */ +extern const struct pmu_irqs * +reserve_pmu(void); + +/** + * release_pmu() - Relinquish control of the performance counters + * + * Release the performance counters and allow someone else to use them. + * Callers must have disabled the counters and released IRQs before calling + * this. The 'struct pmu_irqs' returned from reserve_pmu() must be passed as + * a cookie. + */ +extern int +release_pmu(const struct pmu_irqs *irqs); + +/** + * init_pmu() - Initialise the PMU. + * + * Initialise the system ready for PMU enabling. This should typically set the + * IRQ affinity and nothing else. The users (oprofile/perf events etc) will do + * the actual hardware initialisation. + */ +extern int +init_pmu(void); + +#else /* CONFIG_CPU_HAS_PMU */ + +static inline const struct pmu_irqs * +reserve_pmu(void) +{ + return ERR_PTR(-ENODEV); +} + +static inline int +release_pmu(const struct pmu_irqs *irqs) +{ + return -ENODEV; +} + +static inline int +init_pmu(void) +{ + return -ENODEV; +} + +#endif /* CONFIG_CPU_HAS_PMU */ + +#endif /* __ARM_PMU_H__ */ |