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RE: sdram scrubbing and MMU enabling.
- To: "'Mark Salter'" <msalter at redhat dot com>
- Subject: RE: [ECOS] sdram scrubbing and MMU enabling.
- From: "Mynampati, Venkata S." <MynamVS at nsc-msg01 dot network dot com>
- Date: Fri, 3 Aug 2001 12:01:01 -0500
- Cc: ecos-discuss at sources dot redhat dot com
> >>>>> Mynampati, Venkata S writes:
>
> > Hi
> > in hal_platform_setup.h ( iq80310/include), i noticed that we are
> > enabling MMU and then scrubbing sdram starting from
> RAM_BASE i.e A0000000.
> > Now, my doubt is:
> > since we have mapped the first 4K of RAM to flash,
> > [ mmu_table_rambase:
> > // Map 4k page at 0xa0000000 virt -->
> 0x00000000 physical
> > // Read-Write, cacheable, non-bufferable ]
> > does that mean writing a 0x00 to a0000000 is same as
> writing to flash?
> > Am i missing something here?
>
> No, its a problem. It came up this week on the ARM linux
> kernel mailing list.
> I'm working on a fix.
>
> --Mark
>
what i am doing is scrubbing and then enabling mmu.
venkat