10 Sep
2010
10 Sep
'10
1:18 p.m.
Dear "Ira W. Snyder",
In message 20100909225241.GI3496@ovro.caltech.edu you wrote:
On most (all?) 83xx boards, CONFIG_SYS_BOOTMAPSZ is set to 8MB. The comment says:
...
Does anyone know the true maximum value for CONFIG_SYS_BOOTMAPSZ on Linux (if one even exists)?
The CONFIG_SYS_BOOTMAPSZ thing is as old as U-Boot and PPCBoot exists, i. e. well over a decade. IIRC there was such a limitation on the then current 2.2.13 Linux kernels, at least on MPC8xx and PPC40x systems, which is where all started from.
I am pretty sure that as long as nobody ran into any problems, nobody looked into that code, so it was copied from architecture to architecture without much thinking, if any.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
"I can call spirits from the vasty deep."
"Why so can I, or so can any man; but will they come when you do call
for them?" - Shakespeare, 1 King Henry IV, Act III, Scene I.