[U-Boot] [PATCH 0/20] tegra: Expand Nyan-big support

[Matthew Gorski]

On May 1, 2017 11:45 AM, "Simon Glass" <sjg at chromium.org> wrote:

Hi Matthew,

On 1 May 2017 at 09:37, Matthew Gorski <matt.gorski at gmail.com> wrote:
> Thanks for the reply Simon.
>
> I have been trying to find the System.map for depthcharge to see the
kernel
> load address but I am unable to find anything.  I have tried multiple
> CONFIG_SYS_TEXT_BASE settings with no luck.

How did you choose what to use? Also note that Tegra uses SPL to
start, so you may need to adjust CONFIG_SPL_TEXT_BASE instead.

>
> I am creating my sdcard with a standard linux (Linux for Tegra) rootfs:

Did these instructions come from a web site somewhere?

>
> Partition an SD card
>
> sudo cgpt create <MMC BLOCK DEVICE>
> sudo cgpt add -b 34 -s 32768 -P 1 -S 1 -t kernel <MMC BLOCK DEVICE> # 16
MB
> kernel image partition
> sudo cgpt add -b 32802 -s <ROOT PARTITION SIZE in 512B sectors> -t rootfs
> <MMC BLOCK DEVICE>
>
> cgpt doesn't seem to create a protective MBR. If one is not already in
> place, it can be created with:
>
> sudo gdisk <MMC BLOCK DEVICE> # and enter command w
>
> Copy data to the SD card
>
> sudo dd if=./kernelpart.bin of=<MMC BLOCK DEVICE>p1
> sudo mkfs.ext4 <MMC BLOCK DEVICE>p2
> sudo mount <MMC BLOCK DEVICE>p2 /mnt/
>

How are you actually making it boot? Is this in dev mode with USB boot
enabled and pressing Ctrl-U?

Also, as this is a mailing list, please avoid top-posting.

- Simon

I am using chained boot to test uboot as a FIT image so I I don't have to
flash to spl flash.  Does CONFIG_SPL_TEXT_BASE need to be adjusted for
chained boot?

I am using instructions to boot Linux for Tegra from sdcard/USB in
developer mode.  I can boot L4T fine with kernel v3.10.

What mainline branch should I try?


>
> On Mon, May 1, 2017 at 11:14 AM, Simon Glass <sjg at chromium.org> wrote:
>>
>> Hi Matthew,
>>
>> On 1 May 2017 at 08:43, Matthew Gorski <matt.gorski at gmail.com> wrote:
>> > I am porting u-boot to nyan_big and need some input.  I have been
>> > searching
>> > high and low and found this thread here: [U-Boot] [PATCH 0/20] tegra:
>> > Expand
>> > Nyan-big support
>> >
>> >  https://lists.denx.de/pipermail/u-boot/2015-March/209530.html
>> >
>> > I have tried to build u-boot with the branch here:
>> >
>> > https://git.collabora.com/cgit/user/tomeu/u-boot.git/commit/?h=nyan-big
>> >
>> > and also the official chromium next branch
>>
>> Have you tried mainline U-Boot? It already supports nyan-big. I'm not
>> sure about the situation with the downstream trees.
>>
>> >
>> > I followed building instructions here:
>> >
>> > https://www.chromium.org/chromium-os/firmware-porting-
guide/using-nv-u-boot-on-the-samsung-arm-chromebook
>> >
>> > I build with these commands:
>> >
>> > mkimage -e 0x81000100 -a 0x81000100 -f kernel-big.its kernel-u-boot
>> >
>> > (with and without the load address setting)
>> >
>> > vbutil_kernel --arch arm --pack kernel.bin --keyblock
>> > /usr/share/vboot/devkeys/kernel.keyblock --signprivate
>> > /usr/share/vboot/devkeys/kernel_data_key.vbprivk --version 1 --config
>> > dummy.txt --vmlinuz kernel-u-boot --bootloader dummy.txt
>> >
>> > I have had numerous failed attempts to boot uboot from sdcard mmcblk1p1
>> >
>> > Any help is appreciated I have only gotten a blank screen after weeks
of
>> > flashing.  I can boot custom v3.10 kernels so I assume I am using the
>> > correct building procedure.  Thanks in advance for help from the u-boot
>> > community.
>>
>> It is possible that it needs a particular address due to limitations
>> in the FIT support on Nyan. I'm not sure what it is but might be able
>> to take a look at some point.
>>
>> How are you building your SD card? Are you following some instructions
>> from somewhere?
>>
>> Regards,
>> Simon
>
>