IBM has been using PCI and PCIe internally for some time. Memory-mapped I/O is a process whereby an address generated by the CPU os translated to an address in an I/O device connected to the CPU, in this case an I/O device on a PCIe bus.
Does anybody use that feature other than Linux on Z and CP support of Linux on Z? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Farley, Peter [[email protected]] Sent: Sunday, April 16, 2023 11:42 AM To: [email protected] Subject: What is "Mapped-I/O-addressing facility" in z16? A question out of pure curiosity: In the z16 version of PoOP (SA22-7832-13) there is mention in the "Summary of Changes in Fourteenth Edition" section of this enhancement: Mapped-I/O-addressing facility [PCI ONLY] I can find no other reference to such a facility anywhere in that document. Does anyone know what that item refers to? Peter This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
