RPi4B only allocates 1GB instead of 4GB

[Hrant Dadivanyan]

Hi,

https://wiki.freebsd.org/arm/Raspberry%20Pi is quite useful for RPi4
setup. As for memory, it was:
real memory  = 251428864 (239 MB)
avail memory = 221073408 (210 MB)
until I've replaced existing u-boot with one provided in the wiki -
https://sourceforge.net/projects/rpi4-8gbram-boot-fbsdonly/files/u-boot.bin/download
:
real memory  = 7700508672 (7343 MB)
avail memory = 7487938560 (7141 MB)

Thanks to Robert Crowston and all who work on this, well done.

Thank you,
Hrant

On 2020-08-11 23:47, Gordon Bergling wrote:
> Hi,
> 
> I am currently working on an issue [1] of FreeBSD regarding the memory allocation
> on the RPi4B. I have a 4GB model running a very recent version of -CURRENT,
> but FreeBSD only recognizes 1GB instead of the installed 4GB of memory.
> 
> I spent some time today looking through the general determination of physical 
> memory in FreeBSD in sys/vm/vm_phys.c, but my initial try to simply the issue
> by building a kernel without NUMA support wasn't that successful.
> 
> The next part I was thinking about was the firmware -> kernel interface, lets
> say UEFI vs. 'plain u-boot'. But after the study of information I found on the
> net, that is a far different story, compared to read C-sources.
> 
> Has anyone a RPi4 or RPi4B with memory != 1GB, who could verify that issue?
> 
> I found some information on a chinese website where somebody posted a dmesg
> output of FreeBSD 13-CURRENT on an RPi4B (8 GB version) where the memory
> allocation was correct.
> 
> --Gordon
> 
> [1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247012
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