Re: Need for SHIFT and MASK

From: Ingo Oeser
Date: Sun Oct 09 2005 - 07:24:06 EST

Hi Vivek,

On Sunday 09 October 2005 14:02, Vivek Kutal wrote:
> While browsing through the code i came across macros like SHIFT , MASK
> , SIZE which are used in conversion from linear address to physical
> address
> but this is the job of the processor (address translation) then why do
> we have these macros
> can anyone please explain.

This is usally table driven and someone has to set up
this "Page Translation Tables". That's a job of the Linux kernel.

Just use sth. like Google to find out how it works
or go to the library and read some books on OS design
and virtual memory management.

Happy Studying!


Ingo Oeser

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