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

Matthew Gorski
2017-05-03T00:51:25Z

I have yet to produce a u-boot command prompt. I can get the display to
flash using u-boot mainline with 0x81000100 as the SYS_TEXT_BASE and using:

description = "Chrome OS kernel image with one or more FDT blobs";

but the boot process forces a reboot into recovery.

If I use:

description = "U-Boot + FDT --------- THIS PADDING IS NEEDED SO THE IMAGE
STARTS AT THE RIGHT OFFSET";
Produces a blank screen with the exact u-boot.bin

I hope someone can confirm nyan can chainboot u-boot and possibly post what
the used for their FIT its config. Thanks for all the help and guided
responses.

On Tue, May 2, 2017 at 11:34 AM, Matthew Gorski <matt.gorski@gmail.com>
wrote:

>
>
> On Tue, May 2, 2017 at 9:25 AM, Matthew Gorski <matt.gorski@gmail.com>
> wrote:
>
>>
>>
>> On Tue, May 2, 2017 at 2:54 AM, Sjoerd Simons <
>> sjoerd.simons at collabora.co.uk> wrote:
>>
>>> On Tue, 2017-05-02 at 08:42 +0200, Tomeu Vizoso wrote:
>>> > On 2 May 2017 at 08:40, Tomeu Vizoso <tomeu@tomeuvizoso.net> wrote:
>>> > > On 2 May 2017 at 03:19, Matthew Gorski <matt.gorski@gmail.com>
>>> > > wrote:
>>> > > > Seems if you change the FIT description from anything but
>>> > > >
>>> > > > "description = "Chrome OS kernel image with one or more FDT
>>> > > > blobs";"
>>> > > >
>>> > > > the kernel wont load. So this issue has to be in the kernel-
>>> > > > big.its
>>> > > > <https://git.collabora.com/cgit/user/tomeu/u-boot.git/tree/kernel
>>> > > > -big.its?h=nyan-big&id=35bcb399c0d78ba6a050cc775d467ee75ed06923>
>>> > > >
>>> > > > https://git.collabora.com/cgit/user/tomeu/u-boot.git/tree/kernel-
>>> > > > big.its?h=nyan-big&id=35bcb399c0d78ba6a050cc775d467ee75ed06923
>>> > > >
>>> > > > We may just need a proper working .its for nyan
>>> > >
>>> > > Hi Matthew,
>>> > >
>>> > > it has been quite a while, but I remember that if we only tried
>>> > > chainloading U-Boot was because the goal was to integrate these
>>> > > machines in our LAVA lab, which to date doesn't support Depthcharge
>>> > > (though I hope this will change once I get back some time).
>>> > >
>>> > > I cannot remember how the correct position of the kernel within the
>>> > > FIT image was calculated, but it definitely involved looking at the
>>> > > depthcharge sources.
>>> >
>>> > Actually, I have grepped my IRC logs and turns out that we need for
>>> > the start of U-Boot's code to be aligned to 64kB.
>>>
>>> Yup, U-boot both needs to be properly aligned and know its text base
>>> address.
>>>
>>> So the calculation we did was basically look at depthcharge where in
>>> memory the FIT image gets loaded, determine a suitable load address
>>> after that (e.g fit load + 64k), configure that in u-boot and then add
>>> enough padding in the fit image itself such that the u-boot code starts
>>> at the determined address in memory by putting in just the right amount
>>> of padding ;).
>>>
>>> It is rather ugly, but it does allow running u-boot without the need to
>>> change the firmware in flash.
>>>
>>
>> Thank You Tomeu, Sjoerd and Simon for taking the time to chime in on an
>> old but interesting topic.
>>
>> I believe I have enough info from you all to get this figured out now.
>>
>> Since depthcharch loads the FIT image at 0x81000000
>> https://chromium.googlesource.com/chromiumos/platform/depthc
>> harge/+/master/board/nyan_big/defconfig#11
>>
>> I need to determine a suitable load address e.g fit load + 64k
>>
>> So 81000000 + 64k.
>>
>> One thing I am not certain about is adding the padding to the FIT .its
>> config. How is this done?
>>
>> description = "U-Boot + FDT --------- THIS PADDING IS NEEDED SO THE IMAGE
>> STARTS AT THE RIGHT OFFSET";
>>
>
> Seems if I use the description "description = "U-Boot + FDT --------- THIS
> PADDING IS NEEDED SO THE IMAGE STARTS AT THE RIGHT OFFSET"; "
>
> I get a blank display that shows no signs of loading uboot BUT if I use:
>
> description = "Chrome OS kernel image with one or more FDT blobs";
>
> Nyan tries to load something because the display flashes like a normal
> bootup but immediately reboots into chromeos usb/sdcard recovery.
>
> So the hack in the the collabora uboot kernel-big.its doesnt seem to work
> anymore unless the padding is messing with the load address.
>
> I am using mainline uboot with CONFIG_SYS_TEXT_BASE 0x81000100 should
> this be changed?
>
> Also i am trying to figure out how padding is calculated in a fit image
> and this is confusing. Is the padding the actual description length?
>
>>
>>
>>> > Thus the padding.
>>> >
>>> > Regards,
>>> >
>>> > Tomeu
>>> >
>>> > > But I do think to remember that it was only an issue once U-Boot
>>> > > tried
>>> > > to relocate itself.
>>> > >
>>> > > I don't see any reason why my old branch wouldn't work today on
>>> > > your
>>> > > machine, other than maybe your hw is a different revision with a
>>> > > memory chip that wasn't supported back then? I also don't see why
>>> > > mainline wouldn't work, provided you have that hack in the ITS.
>>> > >
>>> > > I'm adding Sjoerd to CC in case he remembers.
>>> > >
>>> > > Good luck,
>>> > >
>>> > > Tomeu
>>> > >
>>> > > > On Mon, May 1, 2017 at 7:45 PM, Matthew Gorski <matt.gorski@gmail
>>> > > > .com>
>>> > > > wrote:
>>> > > >
>>> > > > >
>>> > > > >
>>> > > > > On Mon, May 1, 2017 at 7:34 PM, Simon Glass <sjg@chromium.org>
>>> > > > > wrote:
>>> > > > >
>>> > > > > > Hi Matthew,
>>> > > > > >
>>> > > > > > On 1 May 2017 at 17:27, Matthew Gorski <matt.gorski@gmail.com
>>> > > > > > > wrote:
>>> > > > > > >
>>> > > > > > >
>>> > > > > > > On Mon, May 1, 2017 at 6:02 PM, Simon Glass <sjg@chromium.o
>>> > > > > > > rg> wrote:
>>> > > > > > > >
>>> > > > > > > > Hi Matthew,
>>> > > > > > > >
>>> > > > > > > > On 1 May 2017 at 14:30, Matthew Gorski <matt.gorski@gmail
>>> > > > > > > > .com> wrote:
>>> > > > > > > > >
>>> > > > > > > > >
>>> > > > > > > > > On Mon, May 1, 2017 at 2:36 PM, Simon Glass <sjg@chromi
>>> > > > > > > > > um.org>
>>> > > > > >
>>> > > > > > wrote:
>>> > > > > > > > > >
>>> > > > > > > > > > Hi Matthew,
>>> > > > > > > > > >
>>> > > > > > > > > > On 1 May 2017 at 11:26, Matthew Gorski <matt.gorski@g
>>> > > > > > > > > > mail.com>
>>> > > > > >
>>> > > > > > wrote:
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > On Mon, May 1, 2017 at 1:03 PM, Simon Glass <sjg@ch
>>> > > > > > > > > > > romium.org>
>>> > > > > >
>>> > > > > > wrote:
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > Hi Matthew,
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > On 1 May 2017 at 10:40, Matthew Gorski <matt.gors
>>> > > > > > > > > > > > ki at gmail.com>
>>> > > > > > > > > > > > wrote:
>>> > > > > > > > > > > > > Let me repost this to the bottom. New to the
>>> > > > > > > > > > > > > mailing list ;)
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > > 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?
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > There's only one mainline, here:
>>> > > > > > > > > > > > http://git.denx.de/?p=u-boot.git;a=summary
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > There are various custodian branches but I don't
>>> > > > > > > > > > > > believe the
>>> > > > > >
>>> > > > > > tegra
>>> > > > > > > > > > > > one
>>> > > > > > > > > > > > has anything different from mainline at present.
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > - Simon
>>> > > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > I will give mainline a try with:
>>> > > > > > > > > > >
>>> > > > > > > > > > > CONFIG_SYS_TEXT_BASE 0x8010E000
>>> > > > > > > > > > > and
>>> > > > > > > > > > >
>>> > > > > > > > > > > CONFIG_SPL_TEXT_BASE 0x80108000
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > I know I will also need:
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > CONFIG_DISPLAY_PORT=y
>>> > > > > > > > > >
>>> > > > > > > > > > Do you mean CONFIG_DISPLAY? If so, it is already
>>> > > > > > > > > > defined.
>>> > > > > > > > > >
>>> > > > > > > > > > > CONFIG_VIDEO_TEGRA124=y
>>> > > > > > > > > >
>>> > > > > > > > > > That is defined in mainline
>>> > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > for the console to display command prompt.
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > The FIT config I am using is from
>>> > > > > > > > > > >
>>> > > > > > > > > > > here:https://git.collabora.com/cgit/user/tomeu/u-bo
>>> > > > > > > > > > > ot.git/
>>> > > > > >
>>> > > > > > commit/?h=nyan-big
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > Do I need to adjust:
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > load = <0>;
>>> > > > > > > > > > > entry = <0>;
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > /dts-v1/;
>>> > > > > > > > > > >
>>> > > > > > > > > > > / {
>>> > > > > > > > > > > description = "U-Boot + FDT --------- THIS
>>> > > > > > > > > > > PADDING IS NEEDED
>>> > > > > >
>>> > > > > > SO
>>> > > > > > > > > > > THE
>>> > > > > > > > > > > IMAGE STARTS AT THE RIGHT OFFSET";
>>> > > > > > > > > >
>>> > > > > > > > > > Perhaps you need to adjust this? How was the length
>>> > > > > > > > > > of it
>>> > > > > >
>>> > > > > > calcualted?
>>> > > > > > > > >
>>> > > > > > > > >
>>> > > > > > > > > I am really not sure how the padding was calculated. I
>>> > > > > > > > > just assumed
>>> > > > > > > > > this
>>> > > > > > > > > kernel-big.its FIT config was correct for nyan_big. I
>>> > > > > > > > > will try
>>> > > > > >
>>> > > > > > using my
>>> > > > > > > > > working linux kernel fit config.
>>> > > > > > > > > >
>>> > > > > > > > > >
>>> > > > > > > > > > > #address-cells = <1>;
>>> > > > > > > > > > > images {
>>> > > > > > > > > > > kernel at 1{
>>> > > > > > > > > > > description = "kernel";
>>> > > > > > > > > > > data = /incbin/("u-boot-dtb.bin");
>>> > > > > > > > > > > type = "kernel_noload";
>>> > > > > > > > > > > arch = "arm";
>>> > > > > > > > > > > os = "linux";
>>> > > > > > > > > > > compression = "none";
>>> > > > > > > > > > > load = <0>;
>>> > > > > > > > > > > entry = <0>;
>>> > > > > > > > > > > };
>>> > > > > > > > > > > fdt at 1{
>>> > > > > > > > > > > description = "tegra124-nyan-big.dtb";
>>> > > > > > > > > > > data = /incbin/("dts/dt.dtb");
>>> > > > > > > > > > > type = "flat_dt";
>>> > > > > > > > > > > arch = "arm";
>>> > > > > > > > > > > compression = "none";
>>> > > > > > > > > > > hash at 1{
>>> > > > > > > > > > > algo = "sha1";
>>> > > > > > > > > > > };
>>> > > > > > > > > > > };
>>> > > > > > > > > > > };
>>> > > > > > > > > > > configurations {
>>> > > > > > > > > > > default = "conf at 1";
>>> > > > > > > > > > > conf at 1{
>>> > > > > > > > > > > kernel = "kernel at 1";
>>> > > > > > > > > > > fdt = "fdt at 1";
>>> > > > > > > > > > > };
>>> > > > > > > > > > > };
>>> > > > > > > > > > > };
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > please let me know if I should also adjust the SPL
>>> > > > > > > > > > > CONFIG even
>>> > > > > >
>>> > > > > > though
>>> > > > > > > > > > > I
>>> > > > > > > > > > > am chainbooting uboot:
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > > https://www.chromium.org/chromium-os/firmware-porti
>>> > > > > > > > > > > ng-guide/
>>> > > > > >
>>> > > > > > using-nv-u-boot-on-the-samsung-arm-chromebook#TOC-Installing
>>> > > > > > -nv-U-Boot-chained-U-Boot-method-
>>> > > > > > > > > >
>>> > > > > > > > > > This is exynos, where we booted directly into U-Boot.
>>> > > > > > > > > > Actually I'm
>>> > > > > > > > > > wondering we should boot directly into U-Boot
>>> > > > > > > > > > (instead of SPL) on
>>> > > > > >
>>> > > > > > nyan
>>> > > > > > > > > > also. Perhaps someone at collabora would know? Did
>>> > > > > > > > > > you search the
>>> > > > > > > > > > mailing list?
>>> > > > > > > > > >
>>> > > > > > > > > > Regards,
>>> > > > > > > > > > Simon
>>> > > > > > > > >
>>> > > > > > > > >
>>> > > > > > > > > I have not searched the mailing list. What should I
>>> > > > > > > > > search for?
>>> > > > > > > > > Booting
>>> > > > > > > > > nyan to u-boot directly bypassing SPL?
>>> > > > > > > >
>>> > > > > > > > Here are two subjects to search for:
>>> > > > > > > >
>>> > > > > > > > Veyron-speedy u-boot
>>> > > > > > > > [PATCH 0/20] tegra: Expand Nyan-big support
>>> > > > > > > >
>>> > > > > > > > Regards,
>>> > > > > > > > Simon
>>> > > > > > >
>>> > > > > > >
>>> > > > > > > Very odd if I do not use "#address-cells = <1>;" the
>>> > > > > > > display flashes and
>>> > > > > > > reboots into recovery but if I do use #address-cells = <1>;
>>> > > > > > > in my FIT
>>> > > > > >
>>> > > > > > config
>>> > > > > > > I get a blank screen
>>> > > > > > > so something is working when not using the padding.
>>> > > > > >
>>> > > > > > If you figure out where u-boot-dtb.bin needs to start by
>>> > > > > > looking at
>>> > > > > > depthcharge or where the kernel starts, then you can figure
>>> > > > > > out how
>>> > > > > > long the padding needs to be at the start of the FIT. Rather
>>> > > > > > than
>>> > > > > > guessing...!
>>> > > > > >
>>> > > > > > - Simon
>>> > > > > >
>>> > > > > > Okay so depthcharge starts at 0x81000000 from here:
>>> > > > >
>>> > > > > https://chromium.googlesource.com/chromiumos/platform/
>>> > > > > depthcharge/+/master/board/nyan_big/defconfig#11
>>> > > > >
>>> > > > > In my System.map for u-boot after building says the start is:
>>> > > > > 81000100 T __image_copy_start
>>> > > > > 81000100 T _start
>>> > > > >
>>> > > > > Hence the define CONFIG_SYS_TEXT_BASE 0x81000100
>>> > > > >
>>> > > > > So you say use 0x81000000 as the CONFIG_SYS_TEXT_BASE and not
>>> > > > > 0x81000100
>>> > > > > correct?
>>> > > > >
>>> > > > > > >
>>> > > > > > > /dts-v1/;
>>> > > > > > >
>>> > > > > > > / {
>>> > > > > > > description = "Chrome OS nyan u-boot chain boot
>>> > > > > > > method";
>>> > > > > > > #address-cells = <1>;
>>> > > > > > > images {
>>> > > > > > > kernel at 1{
>>> > > > > > >
>>> > > > > > > >
>>> > > > > > > > > >
>>> > > > > > > > > >
>>> > > > > > > > > > > >
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > > On May 1, 2017 12:11 PM, "Matthew Gorski" <
>>> > > > > >
>>> > > > > > matt.gorski at gmail.com>
>>> > > > > > > > > > > > > wrote:
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > > On May 1, 2017 11:45 AM, "Simon Glass" <sjg@chr
>>> > > > > > > > > > > > > omium.org>
>>> > > > > >
>>> > > > > > wrote:
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > > Hi Matthew,
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > > On 1 May 2017 at 09:37, Matthew Gorski <matt.go
>>> > > > > > > > > > > > > rski 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/2
>>> > > > > > > > > > > > > > > > 015-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/chrom
>>> > > > > >
>>> > > > > > ium-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
>>> > > > > > > > > > > > > >
>>> > > > > > > > > > > > > >
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > >
>>> > > > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > > > >
>>> > > > > > > > >
>>> > > > > > > > >
>>> > > > > > >
>>> > > > > > >
>>> > > > >
>>> > > > >
>>> > > >
>>> > > > _______________________________________________
>>> > > > U-Boot mailing list
>>> > > > U-Boot at lists.denx.de
>>> > > > https://lists.denx.de/listinfo/u-boot
>>>
>>> --
>>> Sjoerd Simons
>>> Collabora Ltd.
>>>
>>
>>
>