low-boot configuration to MPC8260ADS family boards (Again)

low-boot configuration to MPC8260ADS family boards (Again)

[alebas]

Hi,

My board is back, at last. Indeed, a new one has arrived. :-)
OK, finally I think HRCW for MPC8272ADS board for flash lowboot should
be 0x0E_74_B2_4A. But this is still not working. The board keeps reseting
all the time.

With the jumper JP9 set to config from flash, i have checked the contents of
flash when halted ...


8272>md 0
00000000 : 00000e0e 00000e0e 00007474 00007474  ..........tt..tt
00000010 : 0000b2b2 0000b2b2 00004a4a 00004a4a  ..........JJ..JJ
00000020 : 00000000 00000000 00000000 00000000  ................
00000030 : 00000000 00000000 00000000 00000000  ................
00000040 : 00000000 00000000 00000000 00000000  ................
00000050 : 00000000 00000000 00000000 00000000  ................
00000060 : 00000000 00000000 00000000 00000000  ................

So, this isn't what is supposed to be. Here HRCW will be load as 0x00000000
and the uboot code will also be corrupted with the same problem.

However, when I check flash contents with the jumper JP9 pointing to the
BCSR, flash begining is...

8272>md 0xff800000
ff800000 : 0e0e0e0e 0e0e0e0e 74747474 74747474  ........tttttttt
ff800010 : b2b2b2b2 b2b2b2b2 4a4a4a4a 4a4a4a4a  ........JJJJJJJJ
ff800020 : 00000000 00000000 00000000 00000000  ................
ff800030 : 00000000 00000000 00000000 00000000  ................
ff800040 : 00000000 00000000 00000000 00000000  ................
ff800050 : 00000000 00000000 00000000 00000000  ................


which is OK (and the same flash area than before).

So, why can I view only 16 bits from each 32 bits in flash? Any idea?
Must I change any other jumper?

Thanks,

Alex

RE: low-boot configuration to MPC8260ADS family boards (Again)

[VanBaren, Gerald (AGRE)]

> -----Original Message-----
> From: alebas@televes.com [mailto:alebas@televes.com]=0D
> Sent: Wednesday, November 17, 2004 10:13 AM
> To: linuxppc-embedded@ozlabs.org; Ge@televes.com
> Cc: VanBaren, Gerald (AGRE)
> Subject: low-boot configuration to MPC8260ADS family boards (Again)
>=0D
> Hi,
>=0D
> My board is back, at last. Indeed, a new one has arrived. :-)=0D
> OK, finally I think HRCW for MPC8272ADS board for flash=0D
> lowboot should be 0x0E_74_B2_4A. But this is still not=0D
> working. The board keeps reseting all the time.
>=0D
> With the jumper JP9 set to config from flash, i have checked=0D
> the contents of flash when halted ...
>=0D
>=0D
> 8272>md 0
> 00000000 : 00000e0e 00000e0e 00007474 00007474 =0D
> ..........tt..tt 00000010 : 0000b2b2 0000b2b2 00004a4a=0D
> 00004a4a  ..........JJ..JJ 00000020 : 00000000 00000000=0D
> 00000000 00000000  ................
> 00000030 : 00000000 00000000 00000000 00000000  ................
> 00000040 : 00000000 00000000 00000000 00000000  ................
> 00000050 : 00000000 00000000 00000000 00000000  ................
> 00000060 : 00000000 00000000 00000000 00000000  ................
>=0D
> So, this isn't what is supposed to be. Here HRCW will be load=0D
> as 0x00000000 and the uboot code will also be corrupted with=0D
> the same problem.
>=0D
> However, when I check flash contents with the jumper JP9=0D
> pointing to the BCSR, flash begining is...
>=0D
> 8272>md 0xff800000
> ff800000 : 0e0e0e0e 0e0e0e0e 74747474 74747474 =0D
> ........tttttttt ff800010 : b2b2b2b2 b2b2b2b2 4a4a4a4a=0D
> 4a4a4a4a  ........JJJJJJJJ ff800020 : 00000000 00000000=0D
> 00000000 00000000  ................
> ff800030 : 00000000 00000000 00000000 00000000  ................
> ff800040 : 00000000 00000000 00000000 00000000  ................
> ff800050 : 00000000 00000000 00000000 00000000  ................
>=0D
>=0D
> which is OK (and the same flash area than before).
>=0D
> So, why can I view only 16 bits from each 32 bits in flash? Any idea?
> Must I change any other jumper?
>=0D
> Thanks,
>=0D
> Alex

It looks like you have your HRCW/flash/BR0 (any or all of the
preceeding) memory width misconfigured.  That is why you are seeing
0000xyxy -- you should see xyxyxyxy (four repeated bytes).  The PQ2FADS
flash is 32 bits wide, is the MPC8272ADS?  Your second HRCW byte "74" is
selecting 8 bits port size (BPS field) -- it looks like you are
configured for booting from EEPROM (8 bits wide), not flash.  I suspect
it should be "B4" which is what I'm using on the PQ2FADS.

The PQ2FADS can select either flash (8MByte, 32 bits wide) or EEPROM
(32K, 8 bits wide).  Obviously, you want to select flash, not EEPROM.
U-boot is not going to fit in EEPROM (per its design :-).  Is that the
"other jumper" you refer to?

gvb

******************************************
The following messages are brought to you by the Lawyers' League of
IdioSpeak:

******************************************
The information contained in, or attached to, this e-mail, may contain=
 confidential information and is intended solely for the use of the=
 individual or entity to whom they are addressed and may be subject to=
 legal privilege.  If you have received this e-mail in error you should=
 notify the sender immediately by reply e-mail, delete the message from=
 your system and notify your system manager.  Please do not copy it for any=
 purpose, or disclose its contents to any other person.  The views or=
 opinions presented in this e-mail are solely those of the author and do=
 not necessarily represent those of the company.  The recipient should=
 check this e-mail and any attachments for the presence of viruses.  The=
 company accepts no liability for any damage caused, directly or=
 indirectly, by any virus transmitted in this email.
******************************************