Re: RaspberryPi 4 UEFI firmware v1.41 weirdness

[Ramiro Aceves <ea1abz%gmail.com@localhost>]

El 13/3/25 a las 19:10, Martin Husemann escribió:
> On Thu, Mar 13, 2025 at 07:01:37PM +0100, Ramiro Aceves wrote:
> > netbsd-x260# fdisk sd0
> [..]
> > 3: GPT Protective MBR (sysid 238)
> >      start 1, size 32767 (16 MB, Cyls 0/0/2-2/10/8)
> >          PBR is not bootable: Bad magic number (0x0000)
>
> Try
>
> 	gpt show sd0
>
> instead of fdisk. And maybe the difference to your other method is that
> the card used MBR instead of GPT? I don't know anything about RPi firmware...
>
> Martin

Yess, Martin it works with arm64mbr.img! Thanks!


With arm64.img:

netbsd-x260# gpt show sd0
      start       size  index  contents
          0          1         MBR
          1          1         Pri GPT header
          2          4         Pri GPT table
          6      32762         Unused
      32768     163840      1  GPT part - EFI System
     196608    3317760      2  GPT part - NetBSD FFSv1/FFSv2
    3514368       2043         Unused
    3516411          4         Sec GPT table
    3516415          1         Sec GPT header
    3516416  240760832         Unused
netbsd-x260#


With arm64mbr.img:


netbsd-x260# fdisk sd0
Disk: /dev/rsd0
NetBSD disklabel disk geometry:
cylinders: 119276, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 244277248, bytes/sector: 512

BIOS disk geometry:
cylinders: 1024, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 244277248

Partitions aligned to 2048 sector boundaries, offset 63

Partition table:
0: Primary DOS with 32 bit FAT - LBA (sysid 12)
    start 32768, size 163840 (80 MB, Cyls 2/10/9-12/60/48), Active
1: NetBSD (sysid 169)
    start 196608, size 3319808 (1621 MB, Cyls 12/60/49-218/226/8)
        PBR is not bootable: All bytes are identical (0x00)
2: <UNUSED>
3: <UNUSED>
First active partition: 0
Drive serial number: 0 (0x00000000)
netbsd-x260#

It works fine!

Curious that v1.41 firmware  and arm64.img image is supposed to work to 
Jun Ebihara as he told in port-arm list and does not here... I do not 
know... :-) it is a bug of UEFI firmware? Could RPi4 EEPROM version 
affect the result? (I updated it recently). Sorry but my understanding 
of all of this is very limited.

Jun says:

"Update:
- NetBSD-current 10.99.12 evbarm-aarch64 202503110400Z arm64.img from 
nyftp."

and:

"RPI4 status:
- boot via UEFI_VER=v1.41
  https://github.com/pftf/RPi4/releases";

So we are using the same thing, I think.


Many thanks indeed.
Ramiro.