[OpenBIOS] PowerPC special purpose registers
Lennart Sorensen
lsorense at csclub.uwaterloo.ca
Tue May 3 04:47:17 CEST 2016
On Mon, May 02, 2016 at 06:25:25PM -0500, Segher Boessenkool wrote:
> On Mon, May 02, 2016 at 06:58:43PM -0400, Programmingkid wrote:
> > >> 959 Sampled Data Address * PowerPC 604 only
> > >
> > > 944 = MMCR2
> > > 951 = BAMR
> > > 955 = SIAR
> > > 959 = SDAR (not just 604, fwiw -- where did you read that?)
> >
> > http://www.nxp.com/files/32bit/doc/data_sheet/MPC604.pdf
> > page 19
> >
> > What is says: 604-specific—not defined by the PowerPC architecture
>
> That's not the same as "604 only" :-)
Certainly page 59 of https://fail0verflow.com/media/files/ppc_750cl.pdf
says the 750CL does not implement that register, but will allow writes
to it without exception for compatibility reasons. Certainly makes it
sound like a number of models might implement it. Same for 750GX.
--
Len Sorensen
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