RFC: A new MIPS64 ABI

[Ralf Baechle]

On Mon, Feb 21, 2011 at 07:45:41PM +0000, Richard Sandiford wrote:

> David Daney <ddaney@caviumnetworks.com> writes:
> > Background:
> >
> > Current MIPS 32-bit ABIs (both o32 and n32) are restricted to 2GB of
> > user virtual memory space.  This is due the way MIPS32 memory space is
> > segmented.  Only the range from 0..2^31-1 is available.  Pointer
> > values are always sign extended.
> >
> > Because there are not already enough MIPS ABIs, I present the ...
> >
> > Proposal: A new ABI to support 4GB of address space with 32-bit
> > pointers.
> 
> FWIW, I'd be happy to see this go into GCC.

So am I for the kernel primarily because it's not really a new ABI but
an enhancement of the existing N32 ABI.

  Ralf