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62f082830d
The kernel uses l14 timers as clockevents. l10 timer is used as clocksource if platform master_l10_counter isn't constantly zero. The clocksource is continuous, so it's possible to use high resolution timers. l10 timer is also used as clockevent on UP configurations. This realization is for sun4m, sun4d, sun4c, microsparc-IIep and LEON platforms. The appropriate LEON changes was made by Konrad Eisele. In case of sun4m's oneshot mode, profile irq is zeroed in smp4m_percpu_timer_interrupt(). It is maybe needless (double, triple etc overflow does nothing). sun4d is able to have oneshot mode too, but I haven't any way to test it. So code of its percpu timer handler is made as much equal to the current code as possible. The patch is tested on sun4m box in SMP mode by me, and tested by Konrad on leon in up mode (leon smp is broken atm - due to other reasons). Signed-off-by: Tkhai Kirill <tkhai@yandex.ru> Tested-by: Konrad Eisele <konrad@gaisler.com> [leon up] [sam: revised patch to provide generic support for leon] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
15 lines
313 B
C
15 lines
313 B
C
/*
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* linux/include/asm/timex.h
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*
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* sparc architecture timex specifications
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*/
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#ifndef _ASMsparc_TIMEX_H
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#define _ASMsparc_TIMEX_H
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#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
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/* XXX Maybe do something better at some point... -DaveM */
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typedef unsigned long cycles_t;
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#define get_cycles() (0)
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#endif
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