Date: Thu, 23 Jun 2011 04:36:31 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Andriy Gapon <avg@freebsd.org>, Jung-uk Kim <jkim@freebsd.org> Subject: Re: svn commit: r223426 - in head/sys: dev/acpica kern sys x86/x86 Message-ID: <4E02989F.6040703@FreeBSD.org> In-Reply-To: <8B9DCBA3-C3EC-43EE-8BEC-858A280A2096@xcllnt.net> References: <201106221640.p5MGejHY057164@svn.freebsd.org> <4E021C8E.8010904@FreeBSD.org> <201106221455.07540.jkim@FreeBSD.org> <201106221924.50458.jkim@FreeBSD.org> <D269F433-17DB-4976-BA6F-2BB31527E691@xcllnt.net> <4E028921.2040805@FreeBSD.org> <8B9DCBA3-C3EC-43EE-8BEC-858A280A2096@xcllnt.net>
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Marcel Moolenaar wrote: > On Jun 22, 2011, at 5:30 PM, Alexander Motin wrote: >> Marcel Moolenaar wrote: >>> On Jun 22, 2011, at 4:24 PM, Jung-uk Kim wrote: >>>> I just realized kern_clocksource.c was excluded for arm and ia64. >>>> Here is updated patch. Please ignore the previous one. >>> Any reason why we're not adding kern_clocksource.c for them? >> Their event timers code still waits for refactoring. I have neither >> documentation nor hardware for them. Help would be appreciated. > > Can you give me a pointer to a document orpage that describes > what is being refactored, why and how? In short, timer management code was unified and formalized. Instead of direct programming periodic timers from MD code and calling hard-/ stat-/ profclock() from there, timer hardware should be exposed to the MI kernel using sys/timeet.h API to allow kern_clocksource.c manage it. Last require calling its cpu_initclocks_bsp() and cpu_initclocks_ap() callbacks from MD initialization code, and cpu_idleclock() and cpu_activeclock() from MD cpu_idle(). Here is some references: man 4 eventtimers http://wiki.freebsd.org/201010DevSummit?action=AttachFile&do=view&target=timers.pdf http://svnweb.freebsd.org/base?view=revision&revision=209371 http://svnweb.freebsd.org/base?view=revision&revision=212541 All architectures except ia64 and non-Marvell arm are already done, so you may took any of them as reference. Ask me if you have any questions. -- Alexander Motin
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