There are two ways, the PAE flag and the PSE-36 feature introduced in
P3. These extensions are documented in the IA-32 Intel Architecture
Software Developer's Manuals, which you can find here:
http://developer.intel.com/design/Pentium4/manuals/
Look in Volume 3, Chapter 3 for this info.
robert
On Wed, Feb 21, 2001 at 10:44:30AM +0800, michaelc wrote:
> Hi,
> How does linux support more than 4G memory? I 've read the
> documentation of Intel IA-32 Architecture, I knew that OS
> just address up to 4G physical address space, If OS want to
> access additional 4-GByte section of physical memory, it must
> change the pointer in register CR3 or entries in the
> page-directory-pointer table. That means that Linux just has
> up to 4-GByte page mapping at one time , is that right?
>
>
>
> --
> Best regards,
> michael chen mailto:[EMAIL PROTECTED]
>
>
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