Dear u-boot mailing list,
As no one has provided any feedback regarding my question I am trying my luck again.
As described below depending on the DT's I overlay using an AGL build for RPi4 I get a "Synchronous Abort" handler error. Any hints on what this error means and why u-boot cannot load the overlays would be much appreciated.
I provided the log files of the boot process with CONFIG_LOG enabled. I can send them again if required.
Best Regards, Carles
Mit freundlichen Grüßen / Best regards
Carles Sole Mendi
Engineering Customer Platform Ford Diesel, Customer Projects Ford Diesel EU (PS-EC/ECU2) Robert Bosch GmbH | Postfach 30 02 40 | 70442 Stuttgart | GERMANY | www.bosch.com Tel. +49 711 811-20593 | Fax +49 711 811 | Carles.SoleMendi@de.bosch.com
Registered Office: Stuttgart, Registration Court: Amtsgericht Stuttgart, HRB 14000; Chairman of the Supervisory Board: Prof. Dr. Stefan Asenkerschbaumer; Managing Directors: Dr. Stefan Hartung, Dr. Christian Fischer, Filiz Albrecht, Dr. Markus Forschner, Dr. Markus Heyn, Rolf Najork
-----Original Message----- From: U-Boot u-boot-bounces@lists.denx.de On Behalf Of Sole Mendi Carles (PS-EC/ECC7) Sent: Montag, 25. Juli 2022 11:31 To: u-boot@lists.denx.de Cc: andrei@gherzan.com Subject: "Synchronous Abort" handler, esr 0x96000004 with AGL (Yocto Based)
Dear U-boot mailing list,
My name is Carles and I have been trying for a while to use a Yocto based distribution (AGL) image for RPi4 to control automotive HW using pwm signals. Unfortunately I have been struggling with this when the boot procedure is configured to use u-boot.
I am basically building the minimal image doing following change in the configuration to enable pwm.dtbo:
RPI_KERNEL_DEVICETREE_OVERLAYS: Add following dtbo‘s:
overlays/pwm.dtbo
overlays/pwm-2chan.dtbo
With this changes the image builds and boots without issues. However once I add dtoverlay=pwm in config.txt the boot process does not work anymore and shows following error:
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr
262 bytes read in 5 ms (50.8 KiB/s)
## Executing script at 02400000
"Synchronous Abort" handler, esr 0x96000004
elr: 00000000000a2afc lr : 00000000000a2b34 (reloc)
elr: 000000002ef6fafc lr : 000000002ef6fb34
x0 : 000000002eb5a780 x1 : 1218121712161215
x2 : 000000002eb48e50 x3 : 0000000000000015
x4 : 1224122312221221 x5 : 0000000000000015
x6 : 000000002efc3b88 x7 : 000000002efc3b88
x8 : 0000000000000001 x9 : 0000000000000008
x10: 0000000000000006 x11: 000000002eb529d0
x12: 0000000000002022 x13: 0000000000000001
x14: 0000000000080000 x15: 000000002eb3cfb0
x16: 000000002ef77858 x17: 0000000000000000
x18: 000000002eb48d90 x19: 0000000000000000
x20: 0000000000000006 x21: 0000000000000006
x22: 0000000000000000 x23: 000000002eb3ac68
x24: 000000002efac8a8 x25: 000000002eb615c0
x26: 0000000000bff800 x27: 000000002ebe3d40
x28: 0000000000001800 x29: 000000002eb3abe0
Code: 54000061 d2800000 d65f03c0 f9400401 (b9400821)
Resetting CPU ...
If I disable U-boot using RPI_USE_U_BOOT = „0“ then all works good and I can use the pwm driver and generate pwm signals, but I would really like to be able to use u-boot.
I am not sure how I need to update the u-boot addresses with the added dtbo’s so that u-boot is able to recognize these and boot successfully. Any hints from your side would be much appreciated.
I have enabled logging in u-boot and stored the boot process without dtoverlay=pwm vs.with dtoverlay=pwm. I attach both files for reference. I hope this is helpful.
Mit freundlichen Grüßen / Best regards
Carles Sole Mendi
Engineering Customer Platform Ford Diesel, Customer Projects Ford Diesel EU (PS-EC/ECU2) Robert Bosch GmbH | Postfach 30 02 40 | 70442 Stuttgart | GERMANY | www.bosch.com Tel. +49 711 811-20593 | Fax +49 711 811 | Carles.SoleMendi@de.bosch.commailto:Carles.SoleMendi@de.bosch.com
Registered Office: Stuttgart, Registration Court: Amtsgericht Stuttgart, HRB 14000; Chairman of the Supervisory Board: Prof. Dr. Stefan Asenkerschbaumer; Managing Directors: Dr. Stefan Hartung, Dr. Christian Fischer, Filiz Albrecht, Dr. Markus Forschner, Dr. Markus Heyn, Rolf Najork