Min RAM and ROM footprints

Christian Helmuth christian.helmuth at ...1...
Wed Jan 29 14:02:17 CET 2014


On Wed, Jan 29, 2014 at 12:35:55PM +0100, Norman Feske wrote:
> Apparently, setting RAM0_SIZE to 0x240000 (ca. 2.3 MiB) is enough to run
> core + init + test-printf on PBX-A9 via base-hw.

I did a quick check for foc_pbxa9 with the attached patch. The
smallest working amount of RAM was 0x135000 (ca. 1.2 MiB), but this is
without the RAM used by the Fiasco kernel in the scenario. From the
Fiasco kernel debugger I got "Used 2445KB out of 16384KB of Kmem" with
the command 'km'.

Additionally, we have to add the amount of RAM used by ROM modules
(currently loaded to RAM by the bootloader), which sums up to ca. 2.3
MiB on foc_pbxa9.

Christian Helmuth
Genode Labs

http://www.genode-labs.com/ · http://genode.org/
https://twitter.com/GenodeLabs · /ˈdʒiː.nəʊd/

Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden
Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
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