Wasn't this referred to, at some point, as the Prefix Storage Area? And, is it not also used by VM, VSE, and any other multi-CPU SCP?
W/ zArch it became 8K. Nevertheless, absolute 0 is owned by PR/SM, right? Oh this takes me back years to an Architecture class and the definitions that had to be given because of Multiple Domain Facility. Yeah, AMDAHL started this. There is Absolute addressing, real addressing, and virtual addressing. The hypervisor gets it all, while an LPAR thinks it has absolute addressing, but only has real and virtual. What a headache to keep straight in your head. Sent from iPhone - small keyboard fat fingers - expect spellinf errots. > On Feb 24, 2016, at 8:35 PM, Tom Marchant > <0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote: > >> On Thu, 25 Feb 2016 00:58:30 +0200, Binyamin Dissen wrote: >> >> On Wed, 24 Feb 2016 15:59:57 -0600 Tom Marchant >> <0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote: >> >> :>On Wed, 24 Feb 2016 12:29:58 -0800, Charles Mills wrote: >> >> :>>Hmmm. I am looking at the z PoOps and it never seems to use the >> :>>acronym PSA at all. It simply refers to "Prefixing" and the "Prefix Area." >> >> :>Right. PSA is an MVS control block. >> >> Partially. Much of it is hardware. > > The Principles of Operation defines "Assigned storage locations" within the > first 8K. > These locations are fixed by the architecture. The PSA is an MVS control > block that > maps these fields and others that are not fixed by architecture, but are used > by MVS. > > -- > Tom Marchant > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
