RE: [microblaze-uclinux] uClinux boot problem solved

[Raj Nagarajan <raj.nagarajan@xxxxxxxxxx>]

Hi Fabrice,

xmdstub uses BIP bit to have complete "ownership" of the Processor.. The
bit is set when xmdstub is in control and cleared when the user program
is run.. If you have initialized the bitstream with xmdstub, then this
bit would be set at system startup. But if you use xmdstub to connect,
download and run your uclinux image.. This bit will be cleared when you
run the image.. You should not be having any problem..

A common mistake users make is when they migrate to MDM for Microblaze
debug and leave the bitstream initialized to xmdstub. In this case
xmdstub will set the bip flag at startup, but since you use MDM to
connect, download and run your program, this bit would still be set !!
It is ideal in these cases to initialize your bitstream with a
"bootloop"..

- Raj

> -----Original Message-----
> From: owner-microblaze-uclinux@itee.uq.edu.au 
> [mailto:owner-microblaze-uclinux@itee.uq.edu.au] On Behalf Of 
> SERRANO Fabrice
> Sent: Wednesday, June 16, 2004 2:08 AM
> To: 'microblaze-uclinux@itee.uq.edu.au'
> Subject: [microblaze-uclinux] uClinux boot problem solved
> 
> 
> 	Hi,
> 
> I've finally made uClinux boot on my board. :-)
> 
> I used Xmd to load the image.bin on my board but the msr 
> register was initialized with the value 0x00000008, so the 
> interruption were disabled by the BIP bit of msr. Forcing the 
> msr register to 0x00000002 has solved this problem but I 
> don't understand why msr is initialized with this value. Does 
> anybody have had this problem ?
> 
> Regards,
> 
> Fabrice Serrano
> 
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