From: Timur Tabi <timur@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Turning on instruction address translation on an 8349 causes processor reset
Date: Tue, 18 Jul 2006 13:54:54 -0500 [thread overview]
Message-ID: <44BD2E7E.2090506@freescale.com> (raw)
I'm working on adding support for a new 8349 board to U-Boot, and the processor resets if I turn on the IR bit in the MSR. This happens in function enable_addr_trans() in start.S.
enable_addr_trans:
/* enable address translation */
mfmsr r5
ori r5, r5, (MSR_IR | MSR_DR)
mtmsr r5
isync
blr
with this code, when the "mtmsr" instruction is executed, the processor resets (or hangs - I can't tell). If I change the 4th line to:
ori r5, r5, MSR_DR
It works and U-Boot boots to a command prompt.
Since the BATs are configured the same for data and instruction, I presume the mapping is correct, but there's something wrong with turning on instruction address translation. Anyone have any ideas?
--
Timur Tabi
Linux Kernel Developer @ Freescale
next reply other threads:[~2006-07-18 18:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-18 18:54 Timur Tabi [this message]
2006-07-19 2:46 ` [U-Boot-Users] Turning on instruction address translation on an 8349 causes processor reset Liu Dave-r63238
2006-07-26 22:04 ` Timur Tabi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=44BD2E7E.2090506@freescale.com \
--to=timur@freescale.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox