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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
Vor allem kein Gedanke! Nichts ist kompromittierender als ein  Gedan-
ke!            - Friedrich Wilhelm Nietzsche _Der Fall Wagner_ (1888)

  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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