From: Jun Sun <jsun@mvista.com>
To: Nick Zajerko-McKee <nmckee@telogy.com>
Cc: linux-mips@oss.sgi.com
Subject: Re: Question about generic\time.c 2.4.17
Date: Wed, 24 Jul 2002 11:23:57 -0700 [thread overview]
Message-ID: <3D3EF0BD.6080508@mvista.com> (raw)
In-Reply-To: 1027461913.4699.26.camel@gtlinuxserver1.telogy.design.ti.com
Nick Zajerko-McKee wrote:
> Hi,
>
> I'm working on a new 4Kc platform and was looking at the
> arch\mips\mips-boards\generic\time.c sources. Can someone explain to me
> the function of do_fast_gettimeoffset(), especially the do_div64_32()
> assembler routine? One of the requirements I have will be not modify
> the timer resolution for my platform to something in the msec range w/o
> disturbing the underlying jiffie setup found in linux.
>
do_div64_32() emulate 64bit division with 32bit registers/values.
do_fast_gettimeoffset() gives the intra-jiffy time offset, which yields higher
timer resolution.
Take a look of /Documentation/mips/time.README.
Jun
next prev parent reply other threads:[~2002-07-24 18:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-23 22:05 Question about generic\time.c 2.4.17 Nick Zajerko-McKee
2002-07-24 14:38 ` Maciej W. Rozycki
2002-07-24 18:23 ` Jun Sun [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-07-24 15:02 Zajerko-McKee, Nick
2002-07-24 15:19 ` Maciej W. Rozycki
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