On 6/14/19 11:09 AM, Andreas Färber wrote:
Am 14.06.19 um 18:41 schrieb Stephen Warren:
On 6/14/19 11:09 AM, Mian Yousaf Kaukab wrote:
Hi, I am seeing a hang with dhcp boot on Jetson TX2. Its running firmware from L4T 32.1 with U-Boot from master branch (c2ea87883e) with [1] applied.
I use following command sequence at u-boot prompt to boot:
Tegra186 (P2771-0000-500) # setenv ftdfile tegra186-p2771-0000.dtb Tegra186 (P2771-0000-500) # setenv boot_targets dhcp Tegra186 (P2771-0000-500) # boot
Last thing I see is the following error from TF-A and the board hangs:
What is TF-A?
The artist formerly known as Arm Trusted Firmware.
Ah OK. I had only ever heard that called ATF before.
U-Boot 2019.07-rc4-00137-g6fefd9c475 (Jun 14 2019 - 16:27:34 +0200)
...
TFTP from server xx.xx.xx.xx; our IP address is xx.xx.xx.xx Filename 'aarch64/grub.efi'. Load address: 0x80280000
...
MMC: no card present Scanning disk sdhci@3400000.blk... Disk sdhci@3400000.blk not ready Scanning disk sdhci@3460000.blk... Found 32 disks copying carveout for /host1x@13e00000/display-hub@15200000/display@15200000... copying carveout for /host1x@13e00000/display-hub@15200000/display@15210000... copying carveout for /host1x@13e00000/display-hub@15200000/display@15220000... ERROR: ARI request timed out: req 89 on CPU 4 ASSERT: plat/nvidia/tegra/soc/t186/drivers/mce/ari.c <127> : retries != 0U
That file doesn't exist in U-Boot; I guess it's part of grub.efi?
Looks rather like a TF-A path to me, CC'ing Varun.
Ah yes, I do see that path in our ATF code.
As Yousaf says above, it's the TF-A you guys ship with latest R32.1.0.
Maybe the tftpboot operation is overwriting memory used by your TF-A, or
That's pretty unlikely since ATF code/data is in a protected memory region that non-secure software can't access.
differing memory usage is uncovering a missing U-Boot EFI reservation?
Perhaps. I know almost nothing about U-Boot EFI though.
(I recently wondered whether TX1 may be missing some, as I needed multiple tries to boot the kernel successfully there - TF-A 2.1 didn't work there, so some more investigations TBD. R28.3.0 still wasn't booting U-Boot ~2019.04, I needed R24.2.2 still as you once suggested.)
Hmm. Are you building your own copy of ATF (you mentioned 2.1; I can't recall what version we ship)?
FWIW, my usptream U-Boot test system uses L4T r28.1 to test Jetson TX1 and TX2. It does test DHCP/TFTP, but not EFI or booting a kernel.
Can you provide complete instructions on how to reproduce this issue (e.g. which components in L4T you replaced, how to build those replacements, how to get/build/use EFI, any config/script/... files you used from U-Boot/EFI to trigger the issue above)?
Your best bet is likely to post all this information to the NVIDIA Jetson forum so our support people can track the process. I don't expect to have much time personally to look at EFI stuff on TX2 right now. Sorry.