Dealing with RAM not starting at 0x00000000

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* Dealing with RAM not starting at 0x00000000
@ 2005-02-01  9:36 Nori, Soma Sekhar
  2005-02-01  9:36 ` Nori, Soma Sekhar
  2005-02-03 12:29 ` Ralf Baechle
  0 siblings, 2 replies; 3+ messages in thread
From: Nori, Soma Sekhar @ 2005-02-01  9:36 UTC (permalink / raw)
  To: linux-mips

Hi All,

I am working towards porting 2.6.10 kernel on a mips 4kec based board
which has physical memory starting at 0x14000000.
What is the best way to overcome the "hole" from 0x00000000 to
0x14000000 without incuring a huge memory overhead.
(For exception handling there is 4k of RAM kept at 0x00000000 also - but
I guess linux paging need need not be aware of this small RAM)

Any suggestions/pointers are greatly appreciated. 

Thanks,
Sekhar

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Dealing with RAM not starting at 0x00000000
  2005-02-01  9:36 Dealing with RAM not starting at 0x00000000 Nori, Soma Sekhar
@ 2005-02-01  9:36 ` Nori, Soma Sekhar
  2005-02-03 12:29 ` Ralf Baechle
  1 sibling, 0 replies; 3+ messages in thread
From: Nori, Soma Sekhar @ 2005-02-01  9:36 UTC (permalink / raw)
  To: linux-mips

Hi All,

I am working towards porting 2.6.10 kernel on a mips 4kec based board
which has physical memory starting at 0x14000000.
What is the best way to overcome the "hole" from 0x00000000 to
0x14000000 without incuring a huge memory overhead.
(For exception handling there is 4k of RAM kept at 0x00000000 also - but
I guess linux paging need need not be aware of this small RAM)

Any suggestions/pointers are greatly appreciated. 

Thanks,
Sekhar

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: Dealing with RAM not starting at 0x00000000
  2005-02-01  9:36 Dealing with RAM not starting at 0x00000000 Nori, Soma Sekhar
  2005-02-01  9:36 ` Nori, Soma Sekhar
@ 2005-02-03 12:29 ` Ralf Baechle
  1 sibling, 0 replies; 3+ messages in thread
From: Ralf Baechle @ 2005-02-03 12:29 UTC (permalink / raw)
  To: Nori, Soma Sekhar; +Cc: linux-mips

On Tue, Feb 01, 2005 at 03:06:29PM +0530, Nori, Soma Sekhar wrote:

> I am working towards porting 2.6.10 kernel on a mips 4kec based board
> which has physical memory starting at 0x14000000.
> What is the best way to overcome the "hole" from 0x00000000 to
> 0x14000000 without incuring a huge memory overhead.
> (For exception handling there is 4k of RAM kept at 0x00000000 also - but
> I guess linux paging need need not be aware of this small RAM)

You can set PAGE_OFFSET to 0x94000000.  If you do this you're probably
going to run into a few bugs where PAGE_OFFSET is assumed to be KSEG0,
that is 0x80000000.  Nothing dramatic though.

  Ralf

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2005-02-03 12:30 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2005-02-01  9:36 Dealing with RAM not starting at 0x00000000 Nori, Soma Sekhar
2005-02-01  9:36 ` Nori, Soma Sekhar
2005-02-03 12:29 ` Ralf Baechle

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