From: Benjamin Herrenschmidt <benh@kernel•crashing.org>
To: Gerhard Pircher <gerhard_pircher@gmx•net>
Cc: linuxppc-dev@ozlabs•org, debian-powerpc@lists•debian.org
Subject: Re: Unmapping pages from the linear addressing without HIGHMEM support
Date: Sat, 11 Mar 2006 10:13:30 +1100 [thread overview]
Message-ID: <1142032411.4057.31.camel@localhost.localdomain> (raw)
In-Reply-To: <22544.1141981797@www088.gmx.net>
> That would mean I cannot reuse the code in dma-mapping.c, right? Killing the
> BAT mappings or limiting the memory size covered by the BATs seems to be
> fairly easy, but I guess I have to setup my own page table for the reserved
> DMA memory area and implement my own alloc_pages() function!?
No, just limit the size of the BAT mapping and mark some of the top
pages of the address space reserved... That should be enough.
Ben.
next prev parent reply other threads:[~2006-03-10 23:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-09 13:51 Unmapping pages from the linear addressing without HIGHMEM support Gerhard Pircher
2006-03-09 22:11 ` Benjamin Herrenschmidt
2006-03-10 9:09 ` Gerhard Pircher
2006-03-10 12:59 ` Dan Malek
2006-03-10 23:12 ` Benjamin Herrenschmidt
2006-03-10 23:13 ` Benjamin Herrenschmidt [this message]
2006-03-11 13:28 ` Gerhard Pircher
2006-03-12 0:07 ` Benjamin Herrenschmidt
[not found] <31042.1141997321@www088.gmx.net>
2006-03-10 13:31 ` Gerhard Pircher
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