Re: FYI: FreeBSD-14.0-CURRENT-arm-armv7-GENERICSD-20220930-42dc8696df5-258315.img is broken for RPi2 v1.1 (so: armv7)

In reply to: Mark Millard : "Re: FYI: FreeBSD-14.0-CURRENT-arm-armv7-GENERICSD-20220930-42dc8696df5-258315.img is broken for RPi2 v1.1 (so: armv7)"
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From: Mark Millard <marklmi_at_yahoo.com>
Date: Thu, 13 Oct 2022 06:44:45 UTC
On 2022-Oct-12, at 22:28, Mark Millard <marklmi@yahoo.com> wrote:

> On 2022-Oct-11, at 19:55, Mark Millard <marklmi@yahoo.com> wrote:
> 
>> On 2022-Oct-11, at 12:10, Warner Losh <imp@bsdimp.com> wrote:
>> 
>>> On Tue, Oct 11, 2022 at 1:03 PM Warner Losh <imp@bsdimp.com> wrote:
>>>> 
>>>> 
>>>> On Tue, Oct 11, 2022 at 12:50 PM Mark Millard <marklmi@yahoo.com> wrote:
>>>> . . .
>>>> 
>>>> For:
>>>> 
>>>> boot-2022-09-16-15-45-b44869cba1b3-good
>>>> boot-2022-09-16-18-02-dd2b9c296776-bad
>>>> 
>>>> there are no armv7 artifacts available between.
>>>> 
>>>> The range is:
>>>> 
>>>>       A) • git: b44869cba1b3 - main - sound: add patch for Lenovo Legion 5 Intel Nuno Teixeira 
>>>>       B) • git: a705c72f2142 - main - stand: use archsw.arch_copyin instead of i386_copyin Warner Losh 
>>>>       C) • git: 4c670b53a000 - main - stand: use archsw.arch_copyin instead of direct call Warner Losh 
>>>>       D) • git: 8b19d28d68a3 - main - stand: Create MOD_ALIGN macro and use it everywhere Warner Losh 
>>>>       E) • git: bca9c87b6104 - main - stand: Create common/modinfo.h Warner Losh 
>>>>       F) • git: 5d1531d9d4e7 - main - stand: Move md_copymodules into modinfo.c and reduce copies Warner Losh 
>>>>       G) • git: 2e6ed47a4609 - main - stand: Move MOD_xxx macros from modinfo.h to .c Warner Losh 
>>>>       H) • git: fc352701ff3a - main - stand: collapse all copies of *copyenv into md_copyenv Warner Losh 
>>>>       • git: e895ab3fbdc1 - main - stand: Remove dead store to bi_kernelname Warner Losh 
>>>>       • git: d43bcf62a218 - main - stand: Stop support booting 4.x and earlier kernels Warner Losh 
>>>>       • git: 59b1d074280d - main - i386: Mark the obsolete fields in bootinfo with _was_ Warner Losh 
>>>>       • git: 4134f677eb39 - main - i386: Make boot loader smaller by reducing size of bootinfo Warner Losh 
>>>>       • git: 9758dd3de1cd - main - stand: Allocate bootinfo rather than have it be static Warner Losh 
>>>>       • git: c0ecae78abbe - main - stand/elf: Only support swapping headers on powerpc. Warner Losh 
>>>>       • git: dd2b9c296776 - main - stand: fix mismerge Warner Losh
>>>> 
>>> Yea, I did a bunch of refactoring. I'm surprised that this produced a change at all. Would be nice to
>>> know which one of these caused the problems.
>> 
>> 5d1531d9d4e7 has the stand/common/metadata.c "align"
>> removal that the later dd2b9c296776 fixes as the
>> "mismerge". So it appears that most of the stages
>> would not build without adjustment for that.
>> 
>> So presume I've made the adjustment for any such
>> such cases below.
>> 
>> H) fc352701ff3a Bad
>> D) 8b19d28d68a3 Good
>> F) 5d1531d9d4e7 Bad
>> E) bca9c87b6104 Good
>> 
>> So the good -> bad back-to-back sequence pair is:
>> 
>> git: bca9c87b6104 - main - stand: Create common/modinfo.h Warner Los
>> git: 5d1531d9d4e7 - main - stand: Move md_copymodules into modinfo.c and reduce copies Warner Losh
>> 
>> 
>> Note: I cross build armv7 via aarch64 normally.
>> There is no "buildstand" analogous to buildworld
>> or buildkernel that takes TARGET and TARGET_ARCH
>> for cross builds. Thus I ended up with a full
>> buildworld to establish a context for the cross
>> builds.
>> 
> 
> I got another oddity to add to the evidence,
> although it might just be a separate issue.
> 
> First off some context: With the additions to
> the microsd card:
> 
> /boot/efi/bcm2710-rpi-2-b.dtb
> /boot/efi/bcm2710-rpi-3-b-plus.dtb
> /boot/efi/bcm2710-rpi-3-b.dtb
> /boot/efi/bcm2710-rpi-cm3.dtb
> 
> I can have armv7 13.1-STABLE FreeBSD boot:
> 
> RPi2B v1.1 (The official support targets this.)
> RPi2B v1.2 (not tested but I could)
> RPi3B+     (no access to such)
> RPi3B      (tested)
> Computer Module 3 (no access to such)
> 
> (I recently sent out notes out that are for mostly USB
> booting to match more closely Bob P.'s context. This
> has some more involved to span the range and some
> specifics of dealing with oddities of the media I have
> access to show up in order for me to demonstrate
> operation.)
> 
> Part of the point of 13.1-STABLE here is avoiding all
> the recent EFI loader changes, not just one block of
> them.
> 
> But for main [so: 14] and the same bca9c87b6104 based EFI
> loader that I reported as working on the RPi2B v1.1, I get
> differing behavior between:
> 
> RPi2B v1.1 (boots with serial console & HDMI output throughout)
> vs.
> RPi3B      (serial output stops and, when HDMO is connected,
>            HDMI output keeps going)
> 
> For the RPi3B, the last serial console line output is:
> 
> Kernel args: (null)
> 
> By contrast, for RPi2B v1.1 with both the serial console and
> the HDMI connected, both get console output, reaching the
> login prompt. (I've not certified every line is present
> on both. There could be differences for all I know.)
> 
> So, in this context, the RPi3B seems to hit the console
> handling type of issue that you were originally expecting.
> 
> I originally looked into this in case the results meant
> that you could use a bcm2710 based RPi* instead of a
> bcm2709 based one for investigating the armv7-style-boot
> with 5d1531d9d4e7 and later EFI loader problem(s), giving
> you more options.
> 

Adding 2 more files (only 1 necessary) and adjusting config.txt
I get both the serial console and the HDMI console not stopping
for the armv7 bca9c87b6104 EFI loader --on both the RPi3B and
the RPi2B v1.1 .

I added:

# ls -Tld /boot/efi/overlays/*-bt.dtbo
-rwxr-xr-x  1 root  wheel  1073 Mar  3 13:29:56 2021 /boot/efi/overlays/disable-bt.dtbo
-rwxr-xr-x  1 root  wheel  1819 Mar  3 13:29:56 2021 /boot/efi/overlays/miniuart-bt.dtbo

but am just using disable-bt.dtbo --via the updated config.txt :

# diff -u /boot/efi/config.txt.orig /boot/efi/config.txt
--- /boot/efi/config.txt.orig   2022-10-07 05:38:00.000000000 +0000
+++ /boot/efi/config.txt        2022-10-13 05:39:26.000000000 +0000
@@ -3,3 +3,6 @@
 kernel=u-boot.bin
 kernel7=u-boot.bin
 dtoverlay=mmc
+#
+# Local addition(s):
+dtoverlay=disable-bt

This changes which UART is used for the serial console.
(As does the alternative *-bt.dtbo .)

So, in summary, to allow armv7 boots via the likes of a RPi3B
as well as a RPi2B v1.1 with the serial console and HDMI console
both operational (if connected) . . .

Based on microsd card media that are from the likes of:

FreeBSD-14.0-CURRENT-arm-armv7-GENERICSD-20221007-b05b1ecbef0-258483.img

The changes are as follows.

For /boot/efi/EFI/BOOT/bootarm.efi , use the bca9c87b6104 EFI
loader from main [so: 14], not later.
(Other earlier ones/13.1-STABLE ones/etc. also would work.)

Add the files:

/boot/efi/bcm2710-rpi-2-b.dtb
/boot/efi/bcm2710-rpi-3-b-plus.dtb
/boot/efi/bcm2710-rpi-3-b.dtb
/boot/efi/bcm2710-rpi-cm3.dtb

Add at least one of:

/boot/efi/overlays/disable-bt.dtbo
/boot/efi/overlays/miniuart-bt.dtbo

Put one of those 2 to use via config.txt , such as via:

# diff -u /boot/efi/config.txt.orig /boot/efi/config.txt
--- /boot/efi/config.txt.orig   2022-10-07 05:38:00.000000000 +0000
+++ /boot/efi/config.txt        2022-10-13 05:39:26.000000000 +0000
@@ -3,3 +3,6 @@
 kernel=u-boot.bin
 kernel7=u-boot.bin
 dtoverlay=mmc
+#
+# Local addition(s):
+dtoverlay=disable-bt

With this both the serial console and HDMI console should
work, each allowing a login.

This may suggest armv7 snapshot content changes in addition
to the EFI loader fixes for what is after bca9c87b6104 .

===
Mark Millard
marklmi at yahoo.com