Re: Troubles booting Pi2 from USB using bootcode.bin method
Date: Thu, 28 Oct 2021 22:21:55 UTC
On 2021-Oct-28, at 12:16, bob prohaska <fbsd@www.zefox.net> wrote: > To make a clean start on this thread I've turned on the UART > for bootcode.bin per Mark's instructions and done a few boot > attempts with the USB2 and USB3 mechanical disks, singly and > in unison. > > The bootlogs are in > http://www.zefox.net/~fbsd/rpi2/bootproblems/ > > An immediate curiosity is that on the first try, booting > with the USB3 device alone worked. I didn't record that > output, unfortunately. Hmm. Too bad. > The second attempt failed, as expected, > and is recorded in bootlog-fail. The third attempt booted both > USB2 and USB3 disks together, recorded in bootlog.success. The two logs do not have the same set of dtdebug messages for loading bcm2709-rpi-2-b.dtb . This is long before u-boot.bin is loaded and so is during the RPi* firmware time frame not u_Boot or FreeBSD;s loader or FreeBSD's kernel or FreeBSD's world. From this I infer that there are two different msdosfs's wtith differing content on the 2 drives and when both drives are in place . You have not reported on the following for either drive's msdosfs : # strings ???/start.elf | grep "VC_BUILD_" Another thing of interest would be something like (both msdosfs mounts): # diff -rq ... ... in order to see what files have distinctions on the two media. A diff of the two config.txt files would be relevant (no -q involvement). > I'm trying to build u-boot-rpi2 and will try to update the USB3 > disk with it once complete. > > The actual boot sequence using bootcode.bin is still a bit hazy: > Is it microSD/dos -> USB/dos ->USB/freebsd ? > Based on the log file for success the ordering is bootcode.bin from the microsd card config.txt (also re-read multiple times later, not listed) start.elf fixup.dat bcm2709-rpi-2-b.dtb overlays/mmc.dtbo cmdline.txt (if it exists) u-boot.bin efi/boot/bootarm.efi efi/freebsd/loader.env /boot/defaults/loader.conf /boot/device.hints /boot/loader.conf /boot/loader.conf.local /boot/boot/kernel /boot/kernel/fi.lemon.ko /boot/kernel/umodem.ko FreeBSD world However the failing one has the following involved (I omit various lines): . . . Loading 'bcm2709-rpi-2-b.dtb' to 0x100 size 0x6879 Unknown dtparam 'pwr_led_gpio' - ignored dterror: no symbols found dtdebug: /__overrides__ node not found Unknown dtparam 'uart0_clkrate' - ignored dtdebug: Opened overlay file 'overlays/mmc.dtbo' brfs: File read: /mfs/sd/overlays/mmc.dtbo dterror: not a valid FDT - err -9 . . . That seqeunce makes no mention of: "using platform 'bcm2835'" and the like. An example is: "found override pwr_led_gpio". Again, all this looks like tehre are two msdosfs involved and the two are not the same by content. === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)