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Subject: Re: RFC: A new MIPS64 ABI
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From: Matt Thomas <jabbathespud@gmail.com>
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Date: Tue, 15 Feb 2011 02:33:00 -0000
Cc: GCC <gcc@gcc.gnu.org>, binutils <binutils@sourceware.org>, Prasun Kapoor <prasun.kapoor@caviumnetworks.com>
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To: David Daney <ddaney@caviumnetworks.com>
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On Feb 14, 2011, at 6:22 PM, David Daney wrote:

> On 02/14/2011 04:15 PM, Matt Thomas wrote:
>>=20
>> I have to wonder if it's worth the effort.  The primary problem I see
>> is that this new ABI requires a 64bit kernel since faults through the
>> upper 2G will go through the XTLB miss exception vector.
>>=20
>=20
> Yes, that is correct.  It is a 64-bit ABI, and like the existing n32 ABI =
requires a 64-bit kernel.

N32 doesn't require a LP64 kernel, just a 64-bit register aware kernel.
Your N32-big does require a LP64 kernel.