kern/57068: a9tmr kernel panic on zynq-zturn Myir Board

[oirammm%gmail.com@localhost]

>Number:         57068
>Category:       kern
>Synopsis:       a9tmr kernel panic on zynq-zturn Myir Board
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Oct 22 10:00:00 +0000 2022
>Originator:     Mario O.
>Release:        9.3 4 Aug. 2022
>Organization:
>Environment:
Cannot give uname -a, the system panics.
>Description:
Hi all,
I suspect there is a problem at least on the evbarm-earmv7hf binary release of install images. After booting from an sd card with the GENERIC.ub kernel, using U-Boot and giving the right dtb zynq-zturn.dtb, the system panics after initializing the ehci0 usb controller, complaining about the a9tmr0.

Using a prebuilt image from    https://nycdn.netbsd.org/pub/arm/ ( 32bit Generic Build: 202210211110Z ) the problem becomes clear, here is the output of the kernel panic:

[   1.0000000] panic: kernel diagnostic assertion "freq != 0" failed: file "/usr/src/sys/arch/arm/cortex/a9tmr.c", line 299
[   1.0000000] cpu0: Begin traceback...
[   1.0000000] 0x80c8da2c: netbsd:db_panic+0x14
[   1.0000000] 0x80c8da4c: netbsd:vpanic+0x114
[   1.0000000] 0x80c8da64: netbsd:kern_assert+0x40
[   1.0000000] 0x80c8daa4: netbsd:a9tmr_delay+0x14c
[   1.0000000] 0x80c8dae4: netbsd:zynqusb_attach_common+0x284
[   1.0000000] 0x80c8dbac: netbsd:zynqusb_attach+0xd0
[   1.0000000] 0x80c8dbe4: netbsd:config_attach_internal+0x1d8
[   1.0000000] 0x80c8dc2c: netbsd:config_found+0xe4
[   1.0000000] 0x80c8dd9c: netbsd:fdt_scan+0x2ac
[   1.0000000] 0x80c8ddbc: netbsd:fdt_rescan+0x58
[   1.0000000] 0x80c8ddf4: netbsd:config_attach_internal+0x1d8
[   1.0000000] 0x80c8de3c: netbsd:config_found+0xe4
[   1.0000000] 0x80c8de7c: netbsd:arm_fdt_attach+0xa4
[   1.0000000] 0x80c8deb4: netbsd:config_attach_internal+0x1d8
[   1.0000000] 0x80c8def4: netbsd:config_rootfound+0x74
[   1.0000000] 0x80c8df14: netbsd:cpu_configure+0x68
[   1.0000000] 0x80c8df9c: netbsd:main+0x32c
[   1.0000000] 0x80c8dfac: netbsd:kernel_text+0x54
[   1.0000000] cpu0: End traceback...
Stopped in pid 0.0 (system) at  netbsd:cpu_Debugger+0x4:        bx      r14

It is a systematic problem, every time you try booting the board it panics. It could be a problem on my specific board, it is part of a project and I work only on the OS part of the system, not on the fpga side.

The board uses a MYS-7Z020-C(766)PCBA as main CPU ( Zynq family 7020 ) and works without any problem with a custom built poky linux distribution.

I hope this can help.
M.

>How-To-Repeat:

>Fix: