Broadcom XLP support

[ANDY KENNEDY]

> -----Original Message-----
> From: Paul_Koning@Dell.com [mailto:Paul_Koning@Dell.com]
> Sent: Wednesday, August 03, 2016 7:26 AM
> To: ANDY KENNEDY
> Cc: binutils@sourceware.org
> Subject: Re: Broadcom XLP support
> 
> 
> > On Aug 2, 2016, at 5:37 PM, ANDY KENNEDY <ANDY.KENNEDY@adtran.com> wrote:
> >
> > ...
> > The addition of XLP to the new binutils came with the following comment:
> >   /* XLP is mostly like XLR, with the prominent exception it is being
> >      MIPS64R2.  */
> > which may not be correct.  The kernel source includes Broadcom/Netlogic
> > specific instructions that are not defined as a part of the XLR.  IIRC,
> > the XLP is a superset of the XLR.
> 
> XLP is MIPS64r2, plus XLP-specific instructions.  Instruction-wise it is a superset of XLR, though
> the SOC machinery (the on-chip I/O devices) are quite different.  For one thing, the endianness
> rules of the SOC devices are different, as is the way you talk to the high speed devices like
> Ethernet.

Right, so the statement above is not exactly correct.  A toolchain built
as the XLR won't work for the XLP, due to the missing instructions.

Andy

> 
> 	paul