From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [RFC] ARM timing code refactoring
Date: Mon, 24 Jan 2011 14:02:00 +0100 [thread overview]
Message-ID: <20110124130200.3AF71B187@gemini.denx.de> (raw)
In-Reply-To: <4D3D2942.4060600@free.fr>
Dear Albert ARIBAUD,
In message <4D3D2942.4060600@free.fr> you wrote:
>
> That is assuming a 64-bit timebase, isn't it? for CPUs / SoCs that don't >
> have such a timebase but only a 32-bit timer, the bogo_ms/jiffy would >
> not go through the full 32-bit range, which would cause issues with the >
> timing loops on rollover -- and while a timeout of more than 65 sec may >
> not be too likely, a timeout starting near the wraparound value of >
> bogo_ms still could happen.
Sorry, but I don't get it. What exactly is the problem with a 32 bit
counter, and why would it not go through the full 32-bit range?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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ke! - Friedrich Wilhelm Nietzsche _Der Fall Wagner_ (1888)
next prev parent reply other threads:[~2011-01-24 13:02 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-22 10:20 [U-Boot] [RFC] ARM timing code refactoring Albert ARIBAUD
2011-01-22 10:42 ` Reinhard Meyer
2011-01-22 11:32 ` Albert ARIBAUD
2011-01-22 11:00 ` [U-Boot] [RFC] U-boot (was: ARM) " Reinhard Meyer
2011-01-22 12:22 ` [U-Boot] [RFC] U-boot Albert ARIBAUD
2011-01-22 19:19 ` [U-Boot] [RFC] ARM timing code refactoring Wolfgang Denk
2011-01-22 20:17 ` Albert ARIBAUD
2011-01-22 21:26 ` Wolfgang Denk
2011-01-22 21:51 ` Reinhard Meyer
2011-01-23 10:12 ` Wolfgang Denk
2011-01-23 10:26 ` Reinhard Meyer
2011-01-23 16:23 ` Wolfgang Denk
2011-01-23 18:47 ` Reinhard Meyer
2011-01-23 19:35 ` Wolfgang Denk
2011-01-23 20:59 ` Albert ARIBAUD
2011-01-23 21:22 ` Reinhard Meyer
2011-01-23 22:01 ` Reinhard Meyer
2011-01-23 22:57 ` Wolfgang Denk
2011-01-24 1:42 ` J. William Campbell
2011-01-24 7:24 ` Albert ARIBAUD
2011-01-24 7:50 ` Reinhard Meyer
2011-01-24 12:59 ` Wolfgang Denk
2011-01-24 8:25 ` Andreas Bießmann
2011-01-24 11:58 ` Albert ARIBAUD
2011-01-24 12:06 ` Albert ARIBAUD
2011-01-24 12:58 ` Andreas Bießmann
2011-01-24 12:54 ` Wolfgang Denk
2011-01-24 13:02 ` Wolfgang Denk [this message]
2011-01-24 16:23 ` J. William Campbell
2011-01-22 22:13 ` Albert ARIBAUD
2011-01-23 16:15 ` Wolfgang Denk
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