* Hardcoded Hash_base?
@ 2003-03-13 17:22 Kent Borg
0 siblings, 0 replies; 3+ messages in thread
From: Kent Borg @ 2003-03-13 17:22 UTC (permalink / raw)
To: linuxppc-embedded
In arch/ppc/mm/hashtable.S Hash_base is hardcoded at 0xc0180000, with
a comment suggesting that that value is "just an example". It seems
to be colliding with my initrd, so I am thinking I want to move it.
What restrictions are there for where it goes? Why doesn't it get
defined from the link? How is it that other things are supposed to be
kept clear of it? (Because it is in an mm-directory, does that mean
that the memory manager knows not to allocate that RAM?)
Thanks for any help,
-kb
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^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: Hardcoded Hash_base?
@ 2003-03-13 17:44 Jean-Denis Boyer
2003-03-13 22:06 ` Kent Borg
0 siblings, 1 reply; 3+ messages in thread
From: Jean-Denis Boyer @ 2003-03-13 17:44 UTC (permalink / raw)
To: Kent Borg; +Cc: linuxppc-embedded
> In arch/ppc/mm/hashtable.S Hash_base is hardcoded at 0xc0180000, with
> a comment suggesting that that value is "just an example". It seems
> to be colliding with my initrd, so I am thinking I want to move it.
As the comment says, this code is patched at runtime.
It is done by MMU_init_hw, in arch/ppc/mm/ppc_mmu.c.
The value of Hash_base could be anything, it doesn't matter.
Regards,
--------------------------------------------
Jean-Denis Boyer, B.Eng., Technical Leader
Mediatrix Telecom Inc.
4229 Garlock Street
Sherbrooke (Québec)
J1L 2C8 CANADA
(819)829-8749 x241
--------------------------------------------
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Hardcoded Hash_base?
2003-03-13 17:44 Hardcoded Hash_base? Jean-Denis Boyer
@ 2003-03-13 22:06 ` Kent Borg
0 siblings, 0 replies; 3+ messages in thread
From: Kent Borg @ 2003-03-13 22:06 UTC (permalink / raw)
To: Jean-Denis Boyer; +Cc: linuxppc-embedded
On Thu, Mar 13, 2003 at 12:44:50PM -0500, Jean-Denis Boyer wrote:
>
> > In arch/ppc/mm/hashtable.S Hash_base is hardcoded at 0xc0180000, with
> > a comment suggesting that that value is "just an example". It seems
> > to be colliding with my initrd, so I am thinking I want to move it.
>
> As the comment says, this code is patched at runtime.
> It is done by MMU_init_hw, in arch/ppc/mm/ppc_mmu.c.
> The value of Hash_base could be anything, it doesn't matter.
I guess it does say that. I my eyes glazed over the several times I
tried to understand the comment right before that.
Thanks,
-kb
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
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