Date: Sat, 15 Oct 2022 13:19:07 -0700 From: Mark Millard <marklmi@yahoo.com> To: bob prohaska <fbsd@www.zefox.net> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: How to armv7 boot both RPi2B v1.1 (bcm2709 --real armv7) and RPi3B (bcm2710 aarch64), but not RPI4B (bcm2711 aarch64) Message-ID: <2E0CD516-FDB2-4379-B2B4-71091FEF35AE@yahoo.com> In-Reply-To: <9635B188-3F76-484A-8DFA-3C508E85B9D2@yahoo.com> References: <6B46F46A-2CAF-42C9-9A04-63567D7DB9B2@yahoo.com> <D9B791B7-106A-402E-AD8C-F811EB315560@yahoo.com> <CANCZdfoJ=E=ef86PRaYsvgXWLAu=AdbN%2B_kiv0vPhKVksqPY%2Bg@mail.gmail.com> <FC871551-7C49-4751-8763-2E8F82C1480A@yahoo.com> <CANCZdfoU2Ln2vqymT66Yu6ZdxSrZLAx1%2BA_hstLYSrzBmduHBw@mail.gmail.com> <28D78C89-E195-4EF1-BB7B-E7F75060BDC7@yahoo.com> <20221011153942.GA12477@www.zefox.net> <639AB34E-DEC9-4FA8-8AAC-44604672AEBC@yahoo.com> <20221011171548.GA12624@www.zefox.net> <09A32530-3701-49F1-9369-549FF1162520@yahoo.com> <20221011233327.GA13708@www.zefox.net> <9635B188-3F76-484A-8DFA-3C508E85B9D2@yahoo.com>
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On 2022-Oct-12, at 16:15, Mark Millard <marklmi@yahoo.com> wrote: > On 2022-Oct-11, at 16:33, bob prohaska <fbsd@www.zefox.net> wrote: >=20 >> On Tue, Oct 11, 2022 at 11:37:25AM -0700, Mark Millard wrote: >> [snip]=20 >>> Actually the below is confusing. /boot/msdos >>> is supposed to be a mount point (empty directory) >>> at which the msdosfs can be mounted to make those >>> files show up there, despite being from a different >>> file system.=20 >>=20 >> Apologies for the ambiguity! >>=20 >> /dev/da0s1 on /boot/msdos (msdosfs, local, noatime) >> is the normal dos filesystem on the root USB device. >> Normally it is mounted, IME. >>=20 >> /dev/mmcsd0s1 on /mnt (msdosfs, local) >> was where I mounted the microSD DOS partition >> so the contents could be listed. This is a Pi2=20 >> so a DOS microSD card is required to boot from USB. >> Normally /dev/mmcsd0s1 is not mounted when root >> is booted from USB. >>=20 >> Mostly I wondered if files placed in an "unused" DOS >> subdirectory could be hidden from the boot software. >> It was a poor way to pose the question. >>=20 >> At the moment the armv7 PATA disk is updating. If it boots >> the Pi2 successfully I'll try it on Pi3 and Pi4. If >> that works I'll set up a SATA armv7 disk and test the >> troublesome disk enclosures.=20 >>=20 >=20 > Here is how I got armv7 going for booting both a > RPi2B v1.1 (so: Cortex-A7) and a RPi3B (so: > Cortex-A53). This will not get a RPi4B going. > Because of the EFI/BOOT/bootarm.efi issues with > main [so: 14], I used a 13.1-STABLE snapshot as > the basis for this. >=20 > FYI: the msdosfs snapshot content in: >=20 > = FreeBSD-13.1-STABLE-arm-armv7-GENERICSD-20221007-d497b97e902-252653.img >=20 > looks like: >=20 > # mount -onoatime -tmsdosfs /dev/da0s1 /mnt > # ls -Tld /mnt/* > drwxr-xr-x 1 root wheel 4096 Oct 7 05:22:48 2022 /mnt/EFI > -rwxr-xr-x 1 root wheel 103876 Oct 7 03:29:26 2022 /mnt/MLO > -rwxr-xr-x 1 root wheel 26745 Mar 3 13:29:56 2021 = /mnt/bcm2709-rpi-2-b.dtb > -rwxr-xr-x 1 root wheel 52456 Mar 3 13:29:56 2021 = /mnt/bootcode.bin > -rwxr-xr-x 1 root wheel 89 Oct 7 03:37:56 2022 = /mnt/config.txt > drwxr-xr-x 1 root wheel 8192 Oct 7 05:22:48 2022 /mnt/dtb > -rwxr-xr-x 1 root wheel 7314 Mar 3 13:29:56 2021 /mnt/fixup.dat > -rwxr-xr-x 1 root wheel 3187 Mar 3 13:29:56 2021 = /mnt/fixup_cd.dat > -rwxr-xr-x 1 root wheel 10298 Mar 3 13:29:56 2021 = /mnt/fixup_db.dat > -rwxr-xr-x 1 root wheel 10298 Mar 3 13:29:56 2021 = /mnt/fixup_x.dat > drwxr-xr-x 1 root wheel 4096 Oct 7 05:22:54 2022 /mnt/overlays > -rwxr-xr-x 1 root wheel 2952960 Mar 3 13:29:56 2021 /mnt/start.elf > -rwxr-xr-x 1 root wheel 793116 Mar 3 13:29:56 2021 = /mnt/start_cd.elf > -rwxr-xr-x 1 root wheel 4794472 Mar 3 13:29:56 2021 = /mnt/start_db.elf > -rwxr-xr-x 1 root wheel 3704808 Mar 3 13:29:56 2021 = /mnt/start_x.elf > -rwxr-xr-x 1 root wheel 504892 Oct 7 03:37:20 2022 = /mnt/u-boot.bin > -rwxr-xr-x 1 root wheel 1163404 Oct 7 03:29:26 2022 = /mnt/u-boot.img > -r-xr-xr-x 1 root wheel 462032 Oct 7 05:20:00 2022 /mnt/ubldr.bin >=20 > It does not have the timeout file that allows more time > for USB devices in particular contexts. But timeout > is only directly useful on microsd cards, in order to > allow binding to a wider range of USB boot devices. >=20 > It also does not have any of: >=20 > bcm2710-rpi-2-b.dtb > bcm2710-rpi-3-b-plus.dtb > bcm2710-rpi-3-b.dtb > bcm2710-rpi-cm3.dtb >=20 > Such would be needed for armv7 style booting of any of: >=20 > RPi2 v1.2 > RPi3B+ > RPi3B > Compute Module 3 >=20 > (Again, the armv7 u-boot.bin does not handle the bcm2711*.dtb > related USB hardware, last I checked a RPi4B example anyway. > So I ignore that context here.) >=20 > It also has only: >=20 > # ls -Tld /mnt/overlays/* > -rwxr-xr-x 1 root wheel 1221 Mar 3 13:29:56 2021 = /mnt/overlays/mmc.dtbo >=20 > so it does not have: >=20 > disable-bt.dtbo > miniuart-bt.dtbo >=20 > for controlling which UART handles the serial console > on the likes of a RPi3B. >=20 > The u-boot.bin does not have an adjusted usb_pgood_delay . > (For some of the USB media that I have access to the > adjustment is important to booting. So my adjsutment will > be involved here.) >=20 > The following is being shown after booting an RPi2 v1.1 > (so: a cortex-A7 form of armv7) based on what I adjusted > and used: >=20 > . . . > FreeBSD 13.1-STABLE #0 stable/13-n252653-d497b97e902: Fri Oct 7 = 05:01:41 UTC 2022 > root@releng3.nyi.freebsd.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC = arm > FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git = llvmorg-14.0.5-0-gc12386ae247c) > VT: init without driver. > No PSCI/SMCCC call function found > CPU: ARM Cortex-A7 r0p5 (ECO: 0x00000000) > . . . > # uname -apKU > FreeBSD generic 13.1-STABLE FreeBSD 13.1-STABLE #0 = stable/13-n252653-d497b97e902: Fri Oct 7 05:01:41 UTC 2022 = root@releng3.nyi.freebsd.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm = armv7 1301507 1301507 >=20 > # gpart show -p > =3D> 63 62333889 mmcsd0 MBR (30G) > 63 2016 - free - (1.0M) > 2079 102312 mmcsd0s1 fat32lba [active] (50M) > 104391 62229561 - free - (30G) >=20 > =3D> 63 468862065 da0 MBR (224G) > 63 1985 - free - (993K) > 2048 102400 da0s1 fat32lba [active] (50M) > 104448 468757680 da0s2 freebsd (224G) >=20 > =3D> 0 468757680 da0s2 BSD (224G) > 0 128 - free - (64K) > 128 468757552 da0s2a freebsd-ufs (224G) >=20 > # more /etc/fstab > # Custom /etc/fstab for FreeBSD embedded images > /dev/ufs/rootfs / ufs rw 1 = 1 > /dev/msdosfs/MSDOSBOOT /boot/msdos msdosfs rw,noatime 0 = 0 > tmpfs /tmp tmpfs rw,mode=3D1777 0 = 0 >=20 > NOTE: /dev/msdosfs/MSDOSBOOT is in mmcsd0s1 in my context. > (So the USB msdosfs does not have the MSDOSBOOT label. Avoid > duplicate labels. Which you want mounts as /boot/msdos or > /boot/efi is up to you. Do not take the choices from this > example as important for such.) >=20 > # find /boot/msdos/ -print > /boot/msdos/ > /boot/msdos/bootcode.bin > /boot/msdos/timeout >=20 > Note that I do include timeout in the microsd card's > msdosfs. I've USB media that will not boot otherwise > (necessary, but not sufficient by itself overall). >=20 > As for the USB media . . . >=20 > # mount -onoatime -tmsdosfs /dev/da0s1 /mnt > # ls -Tld /mnt/* > drwxr-xr-x 1 root wheel 4096 Oct 7 05:22:48 2022 /mnt/EFI > -rwxr-xr-x 1 root wheel 103876 Oct 7 03:29:26 2022 /mnt/MLO > -rwxr-xr-x 1 root wheel 26745 Mar 3 13:29:56 2021 = /mnt/bcm2709-rpi-2-b.dtb > -rwxr-xr-x 1 root wheel 26894 Mar 3 13:29:56 2021 = /mnt/bcm2710-rpi-2-b.dtb > -rwxr-xr-x 1 root wheel 29011 Mar 3 13:29:56 2021 = /mnt/bcm2710-rpi-3-b-plus.dtb > -rwxr-xr-x 1 root wheel 28392 Mar 3 13:29:56 2021 = /mnt/bcm2710-rpi-3-b.dtb > -rwxr-xr-x 1 root wheel 26890 Mar 3 13:29:56 2021 = /mnt/bcm2710-rpi-cm3.dtb > -rwxr-xr-x 1 root wheel 52456 Mar 3 13:29:56 2021 = /mnt/bootcode.bin > -rwxr-xr-x 1 root wheel 207 Oct 10 06:05:20 2022 = /mnt/config.txt > -rwxr-xr-x 1 root wheel 89 Oct 7 03:37:56 2022 = /mnt/config.txt.orig > drwxr-xr-x 1 root wheel 8192 Oct 7 05:22:48 2022 /mnt/dtb > -rwxr-xr-x 1 root wheel 7314 Mar 3 13:29:56 2021 /mnt/fixup.dat > -rwxr-xr-x 1 root wheel 3187 Mar 3 13:29:56 2021 = /mnt/fixup_cd.dat > -rwxr-xr-x 1 root wheel 10298 Mar 3 13:29:56 2021 = /mnt/fixup_db.dat > -rwxr-xr-x 1 root wheel 10298 Mar 3 13:29:56 2021 = /mnt/fixup_x.dat > drwxr-xr-x 1 root wheel 4096 Oct 7 05:22:54 2022 /mnt/overlays > -rwxr-xr-x 1 root wheel 2952960 Mar 3 13:29:56 2021 /mnt/start.elf > -rwxr-xr-x 1 root wheel 793116 Mar 3 13:29:56 2021 = /mnt/start_cd.elf > -rwxr-xr-x 1 root wheel 4794472 Mar 3 13:29:56 2021 = /mnt/start_db.elf > -rwxr-xr-x 1 root wheel 3704808 Mar 3 13:29:56 2021 = /mnt/start_x.elf > -rwxr-xr-x 1 root wheel 0 Apr 24 10:58:58 2022 /mnt/timeout > -rwxr-xr-x 1 root wheel 504932 Oct 10 05:17:40 2022 = /mnt/u-boot.bin > -rwxr-xr-x 1 root wheel 504892 Oct 7 03:37:20 2022 = /mnt/u-boot.bin.orig > -rwxr-xr-x 1 root wheel 1163404 Oct 7 03:29:26 2022 = /mnt/u-boot.img > -r-xr-xr-x 1 root wheel 462032 Oct 7 05:20:00 2022 /mnt/ubldr.bin >=20 > So I had added: >=20 > bcm2710-rpi-2-b.dtb > bcm2710-rpi-3-b-plus.dtb > bcm2710-rpi-3-b.dtb > bcm2710-rpi-cm3.dtb >=20 > and (not important on USB media but added anyway): >=20 > timeout >=20 > I used an updated config.txt: >=20 > # diff -u /mnt/config.txt.orig /mnt/config.txt > --- /mnt/config.txt.orig 2022-10-07 03:37:56.000000000 +0000 > +++ /mnt/config.txt 2022-10-10 06:05:20.000000000 +0000 > @@ -1,5 +1,13 @@ > -init_uart_clock=3D3000000 > +#init_uart_clock=3D3000000 > enable_uart=3D1 > kernel=3Du-boot.bin > kernel7=3Du-boot.bin > dtoverlay=3Dmmc > +# > +# Local additions: > +dtoverlay=3Ddisable-bt > +initial_turbo=3D60 > +#uart_2ndstage=3D1 > +#dtdebug=3D1 > +gpu_mem_1024=3D32 > +force_turbo=3D1 >=20 > (Having config.txt on the microsd card's msdosfs will prevent > booting from USB media.) >=20 > I used a u-boot.bin that has my patch, including the > usb_pgood_delay adjustment. >=20 > I also added the 2 *-bt.dtbo files: >=20 > # ls -Tld /mnt/overlays/* > -rwxr-xr-x 1 root wheel 1073 Mar 3 13:29:56 2021 = /mnt/overlays/disable-bt.dtbo > -rwxr-xr-x 1 root wheel 1819 Mar 3 13:29:56 2021 = /mnt/overlays/miniuart-bt.dtbo > -rwxr-xr-x 1 root wheel 1221 Mar 3 13:29:56 2021 = /mnt/overlays/mmc.dtbo >=20 > I will note that, in this configuration, u-boot.bin > output is the first output to show up on the serial > console. This can take a bit to get that far so it > looks initially like nothing is happening but it is. > Be willing to wait a bit. Later below I've added notes about getting initial RPi* firmware debug output. > Moving the microsd card and USB media to the RPi3B and > attempting to boot worked just fine (but required > some of my changes reported above). >=20 > . . . > FreeBSD 13.1-STABLE #0 stable/13-n252653-d497b97e902: Fri Oct 7 = 05:01:41 UTC 2022 > root@releng3.nyi.freebsd.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC = arm > FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git = llvmorg-14.0.5-0-gc12386ae247c) > VT: init without driver. > No PSCI/SMCCC call function found > CPU: ARM Cortex-A53 r0p4 (ECO: 0x00000080) > . . . > # uname -apKU > FreeBSD generic 13.1-STABLE FreeBSD 13.1-STABLE #0 = stable/13-n252653-d497b97e902: Fri Oct 7 05:01:41 UTC 2022 = root@releng3.nyi.freebsd.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm = armv7 1301507 1301507 Showing the differences needed for bootcode.bin to cause basic serial console output from the RPi* firmware (different mounting context than original message): # strings /boot/efi/bootcode.bin.orig | grep BOOT_UART=3D BOOT_UART=3D0 # strings /boot/efi/bootcode.bin | grep BOOT_UART=3D BOOT_UART=3D1 # cmp -x /boot/efi/bootcode.bin.orig /boot/efi/bootcode.bin 00009872 30 31 An in-place (no backup) update can be done with the likes of: # sed -i '' -e 's@BOOT_UART=3D0@BOOT_UART=3D1@' /boot/efi/bootcode.bin (linux typically has different -i notation requirements.) This change makes it more obvious if there is any initial progress or not, instead of waiting for U-Boot output to show up. With this much in place, the uart_2ndstage=3D1 and dtdebug=3D1 lines work when not commented out in config.txt : # more /boot/efi/config.txt=20 #init_uart_clock=3D3000000 enable_uart=3D1 kernel=3Du-boot.bin kernel7=3Du-boot.bin dtoverlay=3Dmmc # # Local additions: dtoverlay=3Ddisable-bt initial_turbo=3D60 uart_2ndstage=3D1 dtdebug=3D1 gpu_mem_1024=3D32 force_turbo=3D1 =3D=3D=3D Mark Millard marklmi at yahoo.com
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