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.

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

https://github.com/chromeos-nvidia-androidtv/gnu-linux-on-acer-chromebook-13#copy-data-to-the-sd-cardCopy 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/

On Mon, May 1, 2017 at 11:14 AM, Simon Glass sjg@chromium.org wrote:

Hi Matthew,

On 1 May 2017 at 08:43, Matthew Gorski matt.gorski@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

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

Hi Matthew,

On 1 May 2017 at 09:37, Matthew Gorski matt.gorski@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@chromium.org wrote:

...

Hi Matthew,

On 1 May 2017 at 08:43, Matthew Gorski matt.gorski@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