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Date: Mon, 10 Nov 2008 13:35:51 +0100
From: Wolfgang Grandegger <wg@domain.hid>
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Subject: Re: [Xenomai-help] Mode switch when using RT heap on ARM
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai-help <xenomai@xenomai.org>

Wolfgang Grandegger wrote:
> Gilles Chanteperdrix wrote:
>> Wolfgang Grandegger wrote:
>>> Hello,
>>>
>>> I realized that accessing memory allocated with rt_heap_alloc() causes
>>> mode switches on ARM i.mx31. The attached patch provides a demo program
>>> to demonstrate the problem, which actually does *not* show up on my
>>> PowerPC TQM5200 board.
>> On ARM, we normally map the heaps uncacheable, this should not be
>> necessary on ARMv6, but I am afraid we then get the fault on first access.
> 
> Is each cache-line of the heap not touched automatically when the heap
> gets created? I thought it's necessary for other archs as well.

s/cache-line/page/

Wolfgang.