[ros-dev] Re: [ros-svn] [navaraf] 16445: Put the page tables and hyperspace at the right place in memory (ie. Windows compatible).

[Alex Ionescu]

Hartmut Birr wrote:

>Filip Navara wrote:
>
>  
>
>>Sorry, I was confused by incorrect graph in the Windows Internals, 4th
>>edition book which shows an 8Mb hyperspace region (in fact the high
>>4Mb are unused).
>>

Yes, that graph is totally wrong and limited...shame for such a good book.

>> Do you think the attached patch corrects the problem?
>>
>>Regards,
>>Filip
>>    
>>
>
>Hi,
>
>your patch does fix the problem. I prefer to use 0xc0800000 - 0xc08fffff
>for the hyperspace region. 
>
But that's not NT-compatible anymore. First of all that's only 0xFFFFF 
bytes, while the Hyperspace region should be 0x400000 bytes. And 
secondly, the region is marked as reserved.  I agree with Filip to use 
0xc0400000-0xc0800000

>It removes the test for pae or nonpae mode.
>
>- Hartmut
>
>  
>
Best regards,
Alex Ionescu