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: Wed, 26 Jul 2006 17:04:00 -0500 [thread overview]
Message-ID: <44C7E6D0.20008@freescale.com> (raw)
In-Reply-To: <995B09A8299C2C44B59866F6391D2635018C72@zch01exm21.fsl.freescale.net>
Liu Dave-r63238 wrote:
> The MPC8349EMDS code in wolfgang's git is working well now. No hang.
> Please check your code carefully.
I've tried and I can't figure out what's wrong. Right now, I have this code in mpc83xx/start.S:
/* For some reason, address translation does not work on the 8349E-mITX */
#ifndef CONFIG_MPC8349ITX
/* enable address translation */
bl enable_addr_trans
sync
#endif
Everything else works fine (I'll be providing a patch for the 8349E-mITX in a week or so). But if I turn on either address translation (instruction or data, it doesn't matter), then the system crashes.
enable_addr_trans:
/* enable address translation */
mfmsr r5
ori r5, r5, (MSR_IR | MSR_DR)
mtmsr r5
isync
blr
The crash occurs right after the 'mtmsr' instruction.
The only thing I can think of is that I'm using the wrong values for CFG_IBATxx, but I have no idea what they should be. I copied them from MPC8349EMDS.h.
--
Timur Tabi
Linux Kernel Developer @ Freescale
prev parent reply other threads:[~2006-07-26 22:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-18 18:54 [U-Boot-Users] Turning on instruction address translation on an 8349 causes processor reset Timur Tabi
2006-07-19 2:46 ` Liu Dave-r63238
2006-07-26 22:04 ` Timur Tabi [this message]
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