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is ioremap() failing or is vmalloc failing ?<br>
<br>
ioremap should just assign a virtual address to a physical address
- does it actually allocate anything ?<br>
I beleive I am ioremap()ing a greater than 64MB Flash ROM and I do
not think it is failing.<br>
<br>
Alex Zeffertt wrote:
<blockquote cite="mid44EAC56D.5020508@cambridgebroadband.com"
type="cite">
<pre wrap="">Phil Nitschke wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi all,
I have 2 GB memory on a 7448 processor, and want to reserve a huge chunk
of it at boot-time, then ioremap() it into the kernel space inside a
device driver. So far I've succeeded with 64 MB, but can't go any
higher, as mm/vmalloc.c tells me: "allocation failed: out of vmalloc
space - use vmalloc=<size> to increase size."
</pre>
</blockquote>
<pre wrap=""><!---->
I remember reading in Linux Device Drivers that you can use the bigphysarea
patch to allocate large memory, as long as you do it at boot time. It seems
it's been ported to 2.6 too:
<a class="moz-txt-link-freetext" href="http://lwn.net/Articles/111132/">http://lwn.net/Articles/111132/</a>
Alex
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Dave Lynch DLA Systems
Software Development: Embedded Linux
717.627.3770 <a class="moz-txt-link-abbreviated" href="mailto:dhlii@dlasys.net">dhlii@dlasys.net</a> <a class="moz-txt-link-freetext" href="http://www.dlasys.net">http://www.dlasys.net</a>
fax: 1.253.369.9244 Cell: 1.717.587.7774
Over 25 years' experience in platforms, languages, and technologies too numerous to list.
"Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction."
Albert Einstein
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