Julien Thierry 7b77452ec5 arm64: use WFE for long delays ... The current delay implementation uses the yield instruction, which is a hint that it is beneficial to schedule another thread. As this is a hint, it may be implemented as a NOP, causing all delays to be busy loops. This is the case for many existing CPUs. Taking advantage of the generic timer sending periodic events to all cores, we can use WFE during delays to reduce power consumption. This is beneficial only for delays longer than the period of the timer event stream. If timer event stream is not enabled, delays will behave as yield/busy loops. Signed-off-by: Julien Thierry <julien.thierry@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2017-10-13 18:56:15 +01:00
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arm_arch_timer.h	arm64: use WFE for long delays	2017-10-13 18:56:15 +01:00
metag_generic.h	metag: Time keeping	2013-03-02 20:09:22 +00:00
pxa.h	ARM: sa11x0/pxa: acquire timer rate from the clock rate	2016-10-18 09:12:36 +02:00
samsung_pwm.h	pwm: Add new pwm-samsung driver	2013-08-12 21:53:22 +02:00
timer-sp804.h	clocksource/drivers/sp804: Convert init function to return error	2016-06-28 10:19:30 +02:00