linux/arch/arm/include/asm/arch_timer.h

#ifndef __ASMARM_ARCH_TIMER_H
#define __ASMARM_ARCH_TIMER_H

#include <asm/errno.h>

#ifdef CONFIG_ARM_ARCH_TIMER
#define ARCH_HAS_READ_CURRENT_TIMER
int arch_timer_of_register(void);
int arch_timer_sched_clock_init(void);
#else
static inline int arch_timer_of_register(void)
{
	return -ENXIO;
}

static inline int arch_timer_sched_clock_init(void)
{
	return -ENXIO;
}
#endif

#endif
ARM: local timers: Add A15 architected timer support Add support for the A15 generic timer and clocksource. As the timer generates interrupts on a different PPI depending on the execution mode (normal or secure), it is possible to register two different PPIs. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-11 17:25:17 +00:00			`#ifndef __ASMARM_ARCH_TIMER_H`
			`#define __ASMARM_ARCH_TIMER_H`

ARM: 7451/1: arch timer: implement read_current_timer and get_cycles This patch implements read_current_timer using the architected timers when they are selected via CONFIG_ARM_ARCH_TIMER. If they are detected not to be usable at runtime, we return -ENXIO to the caller. Furthermore, if read_current_timer is exported then we can implement get_cycles in terms of it for use as both an entropy source and for implementing __udelay and friends. Tested-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2012-07-06 14:46:45 +00:00			`#include <asm/errno.h>`

ARM: local timers: Add A15 architected timer support Add support for the A15 generic timer and clocksource. As the timer generates interrupts on a different PPI depending on the execution mode (normal or secure), it is possible to register two different PPIs. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-11 17:25:17 +00:00			`#ifdef CONFIG_ARM_ARCH_TIMER`
ARM: 7451/1: arch timer: implement read_current_timer and get_cycles This patch implements read_current_timer using the architected timers when they are selected via CONFIG_ARM_ARCH_TIMER. If they are detected not to be usable at runtime, we return -ENXIO to the caller. Furthermore, if read_current_timer is exported then we can implement get_cycles in terms of it for use as both an entropy source and for implementing __udelay and friends. Tested-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2012-07-06 14:46:45 +00:00			`#define ARCH_HAS_READ_CURRENT_TIMER`
ARM: architected timers: add DT support Add runtime DT support and documentation for the Cortex A7/A15 architected timers. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-19 13:53:50 +00:00			`int arch_timer_of_register(void);`
ARM: architected timers: remove support for non DT platforms All mainline platforms using the ARM architected timers are DT only. As such, remove the ad-hoc support that is not longer needed anymore. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-04-27 12:18:42 +00:00			`int arch_timer_sched_clock_init(void);`
ARM: local timers: Add A15 architected timer support Add support for the A15 generic timer and clocksource. As the timer generates interrupts on a different PPI depending on the execution mode (normal or secure), it is possible to register two different PPIs. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-11 17:25:17 +00:00			`#else`
ARM: architected timers: add DT support Add runtime DT support and documentation for the Cortex A7/A15 architected timers. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-19 13:53:50 +00:00			`static inline int arch_timer_of_register(void)`
			`{`
			`return -ENXIO;`
			`}`

ARM: architected timers: Add A15 specific sched_clock implementation Provide an A15 sched_clock implementation using the virtual counter, which is thought to be more useful than the physical one in a virtualised environment, as it can offset the time spent in another VM or the hypervisor. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2011-01-14 15:32:36 +00:00			`static inline int arch_timer_sched_clock_init(void)`
			`{`
			`return -ENXIO;`
			`}`
ARM: local timers: Add A15 architected timer support Add support for the A15 generic timer and clocksource. As the timer generates interrupts on a different PPI depending on the execution mode (normal or secure), it is possible to register two different PPIs. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> 2012-01-11 17:25:17 +00:00			`#endif`

			`#endif`