[U-Boot] DNS323 (Orion5x) must double ORION5X_SZ_BOOTROM to access full flash
Rogan Dawes
rogan at dawes.za.net
Tue Aug 24 09:47:00 CEST 2010
On 2010/08/24 8:07 AM, Albert ARIBAUD wrote:
> Le 24/08/2010 07:21, Chris Moore a écrit :
>> Hi Rogan,
>>
>> Le 23/08/2010 18:06, Rogan Dawes a écrit :
>>> Doubling the value for ORION5X_SZ_BOOTROM allowed me to access the
>>> additional sectors, but that makes me wonder what the reason for it is.
>>>
>>> I know that the flash chip is wired up strangely, but would that also
>>> affect the window mappings? If that is the case, I just need to document
>>> WHY the parameter is doubled, but if not, it would be good to understand
>>> the real reason for the change.
>>>
>>
>> I am (very rashly) stabbing in the dark here because I don't know much
>> about U-Boot and I haven't followed your previous posts (hence this
>> off-list reply).
>>
>> However if your device size is half the bus size (like an 8-bit device
>> on a 16-bit bus) it would seem logical to have to double the window size.
>>
>> Cheers,
>> Chris
>
> Hi Chris, BTW. :)
>
> Rogan,
>
> Seeing as ORION5X_SZ_BOOTROM is only used as a byte address limit for
> window mapping, and device vs bus size govern the maximum amout in a
> single bus access but do not govern its addressing, I don't think device
> width is involved here.
>
> I'd rather ask whether this could be a window alignment issue, i.e is
> the flash base address 8 MB aligned? Seems like it, because IIRC its
> base is FF800000, which is 8MB-aligned.
>
> Can you still try the original u-boot? Does it allow reading the full 8
> MB? If so, can you do a 'md.l 0xF1020000 40' in it, and then in your own
> u-boot with ORION5X_SZ_BOOTROM set to 8MB then 16MB? These are the
> window mapping registers, and it will allow us to know what the CPU
> really thinks boot ROM looks like. Also dump F101046C, that's the boot
> device bus configuration, again in both U-boots.
>
> Amicalement,
Hi Albert,
Yes, I still have the vendor u-boot flashed, so I can still see its
configuration. And, yes, it does allow reading the full 8MB of flash.
Vendor u-boot:
> md.l f1020000 40
f1020000: 07ff5941 90000000 40000000 00000000 AY......... at ....
f1020010: 07ff5931 98000000 40000000 00000000 1Y......... at ....
f1020020: 000f5141 f0000000 00000000 00000000 AQ..............
f1020030: 000f5131 f0100000 00000000 00000000 1Q..............
f1020040: 007f0f11 ff800000 00000000 00000000 ................
f1020050: 001f1e11 fa000000 00000000 00000000 ................
f1020060: 01ff1d11 f8000000 00000000 00000000 ................
f1020070: 000f1b11 fa800000 00000000 00000000 ................
f1020080: f1000000 00000000 00000000 00000000 ................
f1020090: 00000000 00000000 00000000 00000000 ................
f10200a0: 00000000 00000000 00000000 00000000 ................
f10200b0: 00000000 00000000 00000000 00000000 ................
f10200c0: 00000000 00000000 00000000 00000000 ................
f10200d0: 00000000 00000000 00000000 00000000 ................
f10200e0: 00000000 00000000 00000000 00000000 ................
f10200f0: 00000000 00000000 00000000 00000000 ................
Mainline (8MB window):
> md.l f1020000 40
f1020000: 03ff5941 90000000 90000000 00000000 AY..............
f1020010: 00005141 f0000000 90000000 00000000 AQ..............
f1020020: 03ff5931 98000000 00000000 00000000 1Y..............
f1020030: 00005131 f0100000 00000000 00000000 1Q..............
f1020040: 000f1e11 fa000000 00000000 00000000 ................
f1020050: 00ff1d11 f8000000 00000000 00000000 ................
f1020060: 00071b11 fa800000 00000000 00000000 ................
f1020070: 003f0f11 ff800000 00000000 00000000 ..?.............
f1020080: f1000000 00000000 00000000 00000000 ................
f1020090: 00000000 00000000 00000000 00000000 ................
f10200a0: 00000000 00000000 00000000 00000000 ................
f10200b0: 00000000 00000000 00000000 00000000 ................
f10200c0: 00000000 00000000 00000000 00000000 ................
f10200d0: 00000000 00000000 00000000 00000000 ................
f10200e0: 00000000 00000000 00000000 00000000 ................
f10200f0: 00000000 00000000 00000000 00000000 ................
Mainline (16MB window):
> md.l f1020000 40
f1020000: 03ff5941 90000000 90000000 00000000 AY..............
f1020010: 00005141 f0000000 90000000 00000000 AQ..............
f1020020: 03ff5931 98000000 00000000 00000000 1Y..............
f1020030: 00005131 f0100000 00000000 00000000 1Q..............
f1020040: 000f1e11 fa000000 00000000 00000000 ................
f1020050: 00ff1d11 f8000000 00000000 00000000 ................
f1020060: 00071b11 fa800000 00000000 00000000 ................
f1020070: 007f0f11 ff800000 00000000 00000000 ................
f1020080: f1000000 00000000 00000000 00000000 ................
f1020090: 00000000 00000000 00000000 00000000 ................
f10200a0: 00000000 00000000 00000000 00000000 ................
f10200b0: 00000000 00000000 00000000 00000000 ................
f10200c0: 00000000 00000000 00000000 00000000 ................
f10200d0: 00000000 00000000 00000000 00000000 ................
f10200e0: 00000000 00000000 00000000 00000000 ................
f10200f0: 00000000 00000000 00000000 00000000 ................
>
$ diff vendor mainline_8MB
< Vendor u-boot:
> Mainline (8MB window):
---
< f1020000: 07ff5941 90000000 40000000 00000000 AY......... at ....
> f1020000: 03ff5941 90000000 90000000 00000000 AY..............
---
< f1020010: 07ff5931 98000000 40000000 00000000 1Y......... at ....
> f1020010: 00005141 f0000000 90000000 00000000 AQ..............
---
< f1020020: 000f5141 f0000000 00000000 00000000 AQ..............
> f1020020: 03ff5931 98000000 00000000 00000000 1Y..............
---
< f1020030: 000f5131 f0100000 00000000 00000000 1Q..............
> f1020030: 00005131 f0100000 00000000 00000000 1Q..............
---
< f1020040: 007f0f11 ff800000 00000000 00000000 ................
> f1020040: 000f1e11 fa000000 00000000 00000000 ................
---
< f1020050: 001f1e11 fa000000 00000000 00000000 ................
> f1020050: 00ff1d11 f8000000 00000000 00000000 ................
---
< f1020060: 01ff1d11 f8000000 00000000 00000000 ................
> f1020060: 00071b11 fa800000 00000000 00000000 ................
---
< f1020070: 000f1b11 fa800000 00000000 00000000 ................
> f1020070: 003f0f11 ff800000 00000000 00000000 ..?.............
$ diff vendor mainline_16MB
< Vendor u-boot:
> Mainline (16MB window):
---
< f1020000: 07ff5941 90000000 40000000 00000000 AY......... at ....
> f1020000: 03ff5941 90000000 90000000 00000000 AY..............
---
< f1020010: 07ff5931 98000000 40000000 00000000 1Y......... at ....
> f1020010: 00005141 f0000000 90000000 00000000 AQ..............
---
< f1020020: 000f5141 f0000000 00000000 00000000 AQ..............
> f1020020: 03ff5931 98000000 00000000 00000000 1Y..............
---
< f1020030: 000f5131 f0100000 00000000 00000000 1Q..............
> f1020030: 00005131 f0100000 00000000 00000000 1Q..............
---
< f1020040: 007f0f11 ff800000 00000000 00000000 ................
> f1020040: 000f1e11 fa000000 00000000 00000000 ................
---
< f1020050: 001f1e11 fa000000 00000000 00000000 ................
> f1020050: 00ff1d11 f8000000 00000000 00000000 ................
---
< f1020060: 01ff1d11 f8000000 00000000 00000000 ................
> f1020060: 00071b11 fa800000 00000000 00000000 ................
---
< f1020070: 000f1b11 fa800000 00000000 00000000 ................
> f1020070: 007f0f11 ff800000 00000000 00000000 ................
$ diff mainline_8MB mainline_16MB
< Mainline (8MB window):
> Mainline (16MB window):
---
< f1020070: 003f0f11 ff800000 00000000 00000000 ..?.............
> f1020070: 007f0f11 ff800000 00000000 00000000 ................
Here is the dump of the other region you requested, too. It is the same
on all versions of u-boot:
> md.l f101046c 40
f101046c: 8fcfffff 00000000 00000000 00000000 ................
f101047c: 00000000 00000000 00000000 00000000 ................
f101048c: 00000000 00000000 00000000 00000000 ................
f101049c: 00000000 00000000 00000000 00000000 ................
f10104ac: 00000000 00000000 00000000 00000000 ................
f10104bc: 00000000 0004ffff 00000000 00000000 ................
f10104cc: 00000000 00000000 00000000 00000000 ................
f10104dc: 0000001f 0000781f 00000000 f007d8c0 .....x..........
f10104ec: 00000000 00000042 00000000 00000000 ....B...........
f10104fc: 00000000 00000000 00000000 00000000 ................
f101050c: 00000000 00000000 00000000 00000000 ................
f101051c: 00000000 00000000 00000000 00000000 ................
f101052c: 00000000 00000000 00000000 00000000 ................
f101053c: 00000000 00000000 00000000 00000000 ................
f101054c: 00000000 00000000 00000000 00000000 ................
f101055c: 00000000 00000000 00000000 00000000 ................
Hope this makes sense!
Rogan
More information about the U-Boot
mailing list