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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces@kernelnewbies.org] <b>On Behalf Of </b>Vaibhav Jain<br><b>Sent:</b> Wednesday, July 13, 2011 1:38 AM<br><b>To:</b> Daniel Baluta<br><b>Cc:</b> kernelnewbies@kernelnewbies.org<br><b>Subject:</b> Re: Need help understanding memory models,cpu modes and address translation<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi,<br><br>Thanks for the link.I really appreciate but I need something more basic and something that <br>explains these concepts from a broader perspective and not in the context of a <br>particular cpu architecture.Please send me more such links if you come across any.<br><br>Thanks<br>Vaibhav Jain<o:p></o:p></p><div><p class=MsoNormal>On Wed, Jul 13, 2011 at 1:14 AM, Daniel Baluta <<a href="mailto:daniel.baluta@gmail.com">daniel.baluta@gmail.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Hi,<br><br>> I am eager to understand the basics of Memory models (flat, segmented etc)<br>> , CPU modes (real,protected)<br>> and address translation (physical to logical etc.) and how all of them work<br>> together. I am very confused<br>> about this and would really appreciate if someone could provide good<br>> references to these topics.<o:p></o:p></p></div></div><p class=MsoNormal>You may find useful information inside i366 Programmers Manual.<br>Anyhow, reading materials is the first step in understanding these<br>concepts. You will have to actually read/write/debug pieces of code<br>related to them.<br><br>thanks,<br>Daniel.<br><br>[1] <a href="http://pdos.csail.mit.edu/6.828/2010/readings/i386.pdf" target="_blank">pdos.csail.mit.edu/6.828/2010/readings/i386.pdf</a><o:p></o:p></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You might want to try “Understanding the Linux Virtual Memory Manager” by Mel Gorman. It’s freely available on the web.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It’s Linux specific, but since Linux needs to run on a multitude of different processors with different memory management hardware, the approach it takes to doing so in inherently broad.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></div><font face="monospace"></font></body></html>