Problem booting an Raspberry Pi B+ with recent kernels

[Zbigniew Bodek]

Hello,

This may be due to HW watchpoints support.
There are many Debug Arch implementations and the code is supposed to check
and enable or disable it accordingly but there may be a bug there.
I asked people to test this on various platforms but maybe Raspberry Pi
tests were performed on Cortex-A7 Raspberry Pi.
I will check this on the old Rapsberry today.

Best regards
zbb

2016-01-29 18:16 GMT+01:00 Michael Tuexen <tuexen at freebsd.org>:

> Dear all,
>
> tyring to compile/install/boot a recent kernel fails at the boot level.
> Here is the console output:
>
> U-Boot 2013.01-rc1 (Oct 17 2015 - 00:45:25)
>
> DRAM:  480 MiB
> WARNING: Caches not enabled
> MMC:   bcm2835_sdhci: 0
> reading u-boot.env
>
> ** Unable to read "u-boot.env" from mmc0:1 **
> Using default environment
>
> In:    serial
> Out:   lcd
> Err:   lcd
> mbox: Timeout waiting for response
> bcm2835: Could not set USB power state
> Net:   Net Initialization Skipped
> No ethernet found.
> reading uEnv.txt
> ** Unable to read file uEnv.txt **
> Hit any key to stop autoboot:  0
> Booting from: mmc 0 ubldr
> reading ubldr
> 262248 bytes read in 55694 ms (3.9 KiB/s)
> ## Starting application at 0x02000094 ...
> Consoles: U-Boot console
> Compatible U-Boot API signature found @1db682a8
>
> FreeBSD/armv6 U-Boot loader, Revision 1.2
> (root at releng2.nyi.freebsd.org, Sat Oct 17 01:09:56 UTC 2015)
>
> DRAM: 480MB
> Number of U-Boot devices: 1
> U-Boot env: loaderdev='mmc 0'
> Found U-Boot device: disk
>   Checking unit=0 slice=<auto> partition=<auto>... good.
> /boot/kernel/kernel text=0x58fb98 data=0x555a4+0xe5e9c
> syms=[0x4+0xc6da0+0x4+0x94793]
>
> Hit [Enter] to boot immediately, or any other key for command prompt.
> Booting [/boot/kernel/kernel]...
> Using DTB provided by U-Boot at address 0x100.
> Kernel entry at 0x2200180...
> Kernel args: (null)
> panic: Undefined instruction in kernel.
>
> Uptime: 1s
>
> Please note that
> * booting r294694 is fine.
> * I'm only updating the kernel, the userland is still at 1100081.
>
> Any idea?
>
> Best regards
> Michael
>
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