January 2004
Intermediate to advanced
432 pages
11h 1m
English
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Address Translation
Address translation is the process of translating a virtual address to a physical address. Before we begin the translation process, the virtual address is divided into a virtual page number (VPN) and an offset into that page. The VPN is then translated into a physical page number (PPN), and the offset is used as the offset into that physical page.
In PA-RISC 1.1, all pages are a fixed 4 KB long. This means that the offset portion of a virtual address is the lower 12 bits, and the VPN is the upper 20 bits. With PA-RISC 2.0, we introduced the concept of variable-sized pages. This means that the physical pages can be from 4 KB to 64 MB. However, for the purposes of address translation, we assume a 4-KB page size. Thus, we still ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.