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From: "Ian Thompson" <ithompso@stargateip.com>
To: <linux-kernel@vger.kernel.org>
Subject: How can I jump to non-linux address space?
Date: Wed, 3 Oct 2001 18:10:31 -0700	[thread overview]
Message-ID: <NFBBIBIEHMPDJNKCIKOBEEGJCAAA.ithompso@stargateip.com> (raw)

Hi all,

I'm sorry if this is off-topic, but I wasn't sure where else to ask...

My kernel is running from RAM, and I want to jump to an address in ROM
(which unfortunately, the kernel doesn't seem to know anything about).  I
don't plan on trying to resume the kernel after doing this.  However, I'm
getting a prefetch abort.  If I try and load the data, I get a similar
error: "Unable to handle kernel paging request at virtual address 00003000"
where 0x3000 is the ROM address I'm trying to jump to / load from.  How can
I pass execution to this address?  Do I have to turn off the MMU?  FYI, I'm
running a 2.2 variant on an XScale, and used inline assembly to generate the
load & the branch.

Thanks for your help,

-ian


             reply	other threads:[~2001-10-04  1:10 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-04  1:10 Ian Thompson [this message]
2001-10-04  9:04 ` How can I jump to non-linux address space? Helge Hafting
2001-10-04 19:40   ` Ian Thompson
2001-10-04 20:32     ` Richard B. Johnson
2001-10-05  0:35       ` Ian Thompson
2001-10-05  7:55         ` Russell King
2001-10-08 12:51         ` Richard B. Johnson
2001-10-04 20:35 ` Russell King
2001-10-06  0:38   ` Ian Thompson
2001-10-06  7:57     ` Russell King
2001-10-08 17:43       ` Ian Thompson
2001-10-08 20:01         ` Russell King

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