[CentOS-devel] Help needed to Install CentOS on Zynq ZC706 ARM cortex A9

[Piyush Jadhav]

No worries, I hope to understand the SPL boot properly though. I will go
through some reading and in any case, I will wait when you can look into
it.
For now, *I managed to boot centOS* using the kernel made with
petalinux/yocto, and yes I had problems with rights and properly copying
all the files.

You have been a great help and thank you for that!
Regards,
Piyush D Jadhav



On Tue, May 14, 2019 at 10:28 PM Pablo Sebastián Greco <
pablo at fliagreco.com.ar> wrote:

> Hi, I've been trying to answer your mail all day, but hasn't been easy ;)
> El 13/5/19 a las 19:26, Piyush Jadhav escribió:
>
> Hi Pablo,
>
> Sorry for the late reply and thank you for pushing us for getting the
> serial port repaired, the port was not functioning. Now that we have it
> working, I have started to debug through the serial communication, but I
> want to raise some doubts in the process. In the blog,
> https://wiki.centos.org/SpecialInterestGroup/AltArch/armhfp, the last
> step is to *dd* the *u-boot-with-spl.bin* file as follows,
>
>> dd if=/usr/share/uboot/${boardmodel}/u-boot-sunxi-with-spl.bin of=${sdcard} bs=1024 seek=8 conv=fsync,notrunc
>>
>> Yeah, that applies to sunxi devices
>
> But is missing how to load the *u-boot-spl.bin *and* u-boot.img. *Could
> you please shine some light on this for us? I understand that the order has
> to be ROM code -> SPL -> u-boot -> kernel. Does it means that I have to
> also dd u-boot.img, like here,
>
>> dd if=u-boot-spl.bin of=/dev/sdX bs=1024 seek=8
>> dd if=u-boot.img of=/dev/sdX bs=1024 seek=*X (?)*
>>
>>
> That is a good question, that I don't know the answer to. At the moment I
> have my hands full with the preparation for 8, and my simple google queries
> haven't yielded anything interesting.
>
> On the other hand, I also tried to boot with another method using only the
> centOS Rootfs file (in the root ext4 partition), and the Boot.bin and
> image.ub files (in boot partitions) which I created using petalinux/yocto.
> The kernel boots up but falls into the kernel panic, with errors as *cant
> execute the /sbin/init - (error -8)* -> which refers as permission
> denied. Please let us know what you think of this too!
>
> That is a good test, and you could try mixing things to see if it boots
> (maybe that permission denied is caused by a missing driver)
>
> Thanks a ton in advance!
>
>
>
> Regards,
> Piyush
>
>
>
> On Thu, Apr 11, 2019 at 10:23 PM Pablo Sebastián Greco <
> pablo at fliagreco.com.ar> wrote:
>
>>
>> El 10/4/19 a las 09:27, Piyush Jadhav escribió:
>>
>> Hi Pablo,
>>
>> Thank you very much for the help.
>> Though I performed the same steps from the wiki link, (
>> https://wiki.centos.org/SpecialInterestGroup/AltArch/armhfp) for Zynq
>> ZC706 using the uboot files you provided and the generic userland image
>> (also the old version with kernel 4.14), but the device *does not* boot
>> up. The DONE leds on the device does not light up at all.
>>
>> Debugging these things without a serial console tend to be hard, because
>> you're flying blind.
>>
>>
>> At this point I tried the generic userland image files on also the
>> raspberry pi3b+, even the raspberry *does not* boot up. Although
>> userland image provided for particularly raspberry works as expected and
>> boot into the device.
>>
>> Yeah, the rasbperrypi images are really specific for those rpi, it would
>> be a miracle if those worked on other devices.
>>
>>
>> I also see that the userland generic image creates three partitions on
>> the drive, two of which are for boot, which does some procedure to detect
>> the board automatically. I was wondering, if it is possible for you to
>> guide me how I can create single boot partition, using the files you
>> provided.
>>
>> There should be 4 partitions actually
>> 1 vfat, for rpi boot with generic kernel
>> 2 /boot
>> 3 swap
>> 4 /
>>
>>
>> There is high possibility that I am doing something wrong. Please let me
>> know what you think,
>>
>> As I said before, the first thing would be getting the serial console
>> working, with any distribution, just to be able to see the device booting.
>> Then, I'd try just to make uboot work, even without an OS image, just an
>> SD card without any other data or partitions.
>> Only after all that is working, it should be easier to start testing an
>> OS.
>>
>>
>> Regards,
>> Piyush D Jadhav
>>
>>
>>
>> On Tue, Apr 9, 2019 at 2:49 AM Pablo Sebastián Greco <
>> pablo at fliagreco.com.ar> wrote:
>>
>>>
>>> El 8/4/19 a las 12:28, Piyush Jadhav escribió:
>>>
>>> I am a begineer in using the Zynq 7000 ZC706 SoC. I have already booted
>>> linux made with Yocto project with meta-xilinx and PREEMPT-RT layers.
>>> Everything is working as expected. Though we are not satisfied with the
>>> real time performance on Scheduler and Latency tests, however alternatively
>>> it could be interesting to compare with another OS like CentOS.
>>>
>>> I have followed the procedure on described here to install CentOS using
>>> the rootfs files made with yocto and the files in /boot (boot.bin + UImage
>>> + dtb).https://github.com/umiddelb/aarch64/wik ... ch64-board
>>> <https://github.com/umiddelb/aarch64/wiki/Install-CentOS-7-on-your-favourite-ARMv8-ARM64-AArch64-board>
>>>
>>> But I am not able to successfully create the OS. I am not having a
>>> serial communication with the board, so I cant debug further. I will/can
>>> only have a SSH communication once the OS boots up.
>>>
>>> Does anyone guide me how can I take this ahead?
>>>
>>> I could not find anything aarch64 for that device, all I found was 32
>>> bits.
>>> That said, it seems to have mainline uboot and kernel support
>>> (zynq-zc706.dts), so it could be installed using the steps here
>>> https://wiki.centos.org/SpecialInterestGroup/AltArch/armhfp
>>> Since we usually don't build uboot for that device, I made a version for
>>> you to test, and left it here
>>> https://people.centos.org/pgreco/zynq-zc706/
>>> The normal images provided by CentOS use kernel 4.14, but if you need an
>>> image with a newer version, we have this test image here
>>> https://armv7.dev.centos.org/repos/images/CentOS-Userland-7-armv7hl-generic-Minimal-419-v26-1810-sda.raw.xz
>>> which uses 4.19
>>>
>>> Please let us know how it went.
>>>
>>> Thanks.
>>> Pablo.
>>>
>>
>> HTH.
>> Pablo.
>>
> Pablo.
>
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