Re: Page Physical Address and pte

["Kuas (gmane)" <ku4s@xxxxxxxxxxxxxxxxxxxxx>]

Thanks for the reply.

I think I found the answer. 'pte_t' is a 20 bytes base physical address 
of a page with the Least 12 bytes LSB as flags for the hardware control. 
So to get the address, I just have to mask the 'pte_t' value that I have 
in the kernel with PAGE_MASK (FFFFF000).

> If you want to access the page content of a page, do it with the virtual 
> adress. Th adress will be automaticely translated in a physical adress. 
> This job is done by the MMU.

But I am in a kernel mode. How do I use MMU? And I want to scan the 
whole pages not just accessing a particular address.

> > How do I know the size of the page that's filled though? I can't see 
> > that information from the page struct.
> A page on Linux i386 is always 4ko long.

I don't think they are always filled 4 kb right? Are the rest of the 
page zeroed out before they are filled? So a partial filled page would 
have the rest of the page filled with zero. So I can still look to it 
wihtout any error just 0x00.

Kuas.


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