frederick00
Posts: 55
Joined: Mon Jul 13, 2020 8:38 pm

Rasperry pi 4 DRAM address mapping

Mon Jul 27, 2020 2:15 pm

HI Everyone,

I need help about DRAM address mapping on Rasperry pi 4 especially my question is : given two physical memory addresses how can i know if they are in the same DIMM, Rank and Bank ?
is there any bit to check for it ?

Thank you.

W. H. Heydt
Posts: 13613
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Rasperry pi 4 DRAM address mapping

Tue Jul 28, 2020 12:22 am

Pis don't use DIMMs, so your question doesn't apply to them.

frederick00
Posts: 55
Joined: Mon Jul 13, 2020 8:38 pm

Re: Rasperry pi 4 DRAM address mapping

Wed Jul 29, 2020 10:12 am

where can i get information about Rp4 memory geometry ? thank you.

6by9
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 9891
Joined: Wed Dec 04, 2013 11:27 am
Location: ZZ9 Plural Z Alpha, aka just outside Cambridge.

Re: Rasperry pi 4 DRAM address mapping

Wed Jul 29, 2020 11:04 am

Locking this thread as you've now asked that question in viewtopic.php?f=63&t=281380
Software Engineer at Raspberry Pi Trading. Views expressed are still personal views.
I'm not interested in doing contracts for bespoke functionality - please don't ask.

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