On Thu, Jul 26, 2018 at 1:46 PM, David Rusling <[email protected]> wrote:
> Peter,
>    thanks, that was one explanation that I hadn't thought of (32b = 32
> bits).   Really helpful, onwards and upwards...

FYI they work fine 32 and 64 bits on both the 3B and 3B+ for me, only
currently tested 64 bit with uefi but they work fine for me, plus a
bunch of other 96boards.

Peter

> David
>
> On Thu, 26 Jul 2018 at 13:42 Peter Robinson <[email protected]> wrote:
>>
>> On Thu, Jul 26, 2018 at 1:00 PM, David Rusling <[email protected]>
>> wrote:
>> > All,
>> >   I decided to play with u-boot*, so I bought another Raspberry Pi (3b+
>> > this
>> > time, my house backup and useful things is a 3b).   After a bit of
>> > fiddling,
>> > both are now running 64 bit releases of Buster.  I can supply the bits
>> > if
>> > anyone needs anything.
>> >
>> >   So, u-boot.   I can build the normal configuration (rpi_3_defconfig)
>> > on
>> > both Arm and x86.   Trying to build rpi_3_32b_defconfig gives me the
>> > same
>> > error on both x86 and Arm.  Basically, it's trying to pass -marmv5 to
>> > the
>> > compiler and the compiler is having none of it.   I can hack the Arm
>> > Makefile to remove the armv5, but that generates different errors, so no
>> > easy fix.  I've also trying the 'stabbing in the dark' approach of
>> > configuring it 64 bit only etc, but no joy.
>> >
>> >   Two questions:
>> >
>> > [1] Is rpi_3_defconfig the right config to support booting a RPi 3b?
>> > If it
>> > is, I'll swap my home and development boards
>>
>> rpi_3_defconfig is the 64 bit aarch64 config and it's for all models
>> of the 3B, so the original, the 3B+ and the CM3, the
>> rpi_3_32b_defconfig is for 32bit ARMv7 booting so running a 32bit OS
>> on all variants of the 3.
>>
>> > [2] Anyone managing to build u-boot for the RPi 3b+?
>>
>> Yes, the one you built above will detect both models, the
>> rpi_3_32b_defconfig config is also for both models but is for 32 bit
>> OS (32b)
>
> --
> David A Rusling
> CTO, Linaro
> https://linaro.org
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