On Wed, 23 Sep 2020, Baoquan He wrote:
> > > And we don't have mem=X@Y, only mem=nn[KMG].
> > The relocatable kernel of MIPS is still unusable now, so MIPS should
> > use mem=X@Y, and the crash kernel is always different from normal
> > kernel.
>
> Interesting. Seems MIPS does support mem=X@Y, even though the document
> of 'mem=' says it's used to specify amount of memory, but not memory
> region. Anyway, leave this to mips reviewers, thanks for replying.
>
> ~~~~~~~~~~~~~~~~~~~
> mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
> Amount of memory to be used in cases as follows:
Yep, I implemented it for the DECstation back in 2000:
commit 97b7ae4257ef7ba8ed9b7944a4f56a49af3e8abb
Author: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Date: Mon Dec 11 16:41:05 2000 +0000
Memmap fixes from Maciej.
(from the LMO repo) in line with the x86 syntax. I don't know why it
hasn't ever been documented in "Kernel Parameters" (for any port), but I'm
fairly sure it has been somewhere.
FWIW,
Maciej
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