Re: [ECOS] eCos on MPC850SAR board..

[tim at cygnetinc dot com (Tim Michals)]

I had the same problem and just disabled cache and TLB.

----- Original Message -----
From: Kenneth Porter <kenneth_porter@kensingtonlabs.com>
To: <ecos-discuss@sourceware.cygnus.com>
Sent: Wednesday, March 08, 2000 11:18 AM
Subject: Re: [ECOS] eCos on MPC850SAR board..


> On Wed, 8 Mar 2000 17:32:05 +0500 (GMT+0500), Prince John wrote:
>
> > we are trying to port eCos(along with "Hello eCos World" application) on
> > MPC850SAR FADS board. But it gives " Instruction TLB miss " Exception
> > after hal_MMU_init(). Can someone advice us how to solve this?
>
> I've got a similar problem with the MPC823FADS. I haven't yet
> completely resolved it, but I've gotten further.
>
> First, you should use the latest CVS sources, not the 1.2.1 release, as
> there's been some work in the MMU area.
>
> Second, you'll need to define the MPC8xx and MPC850 CPU types (look at
> the powerpc/arch sources) to select the right MMU default tables. (Not
> doing this results in empty tables, making a TLB miss unavoidable.)
> Check the mailing list archives since March 1 (subject line "Where to
> define CYG_HAL_POWERPC_MPC823?") for more info.
>
> I'll be interested to hear how you make out.
>
> Kenneth Porter
> Kensington Laboratories, Inc.
> mailto:kenneth_porter@kensingtonlabs.com
> http://www.kensingtonlabs.com
>
>
>