Re: Mapping small memory region

Bruce, thanks for reply.

The picture is quite simple. The processor has special function register
memory mapped in the range from FFFEF000 to FFFEFFFF (size: 4k). It is not a
RAM region as I errornously stated in original post.

Regarding your questions...
In Wince300 I needed an page table entry to map the linear address to
phyical address.
Small means, the 4k range is smaller than the 4M range requested in
OEMAddressTable.
I need to access them from inside the OAL i.e. during initialization of
interrupts, but also later in OEMIoControl.
I used region as synonym to range, sorry.

/Helge

"Bruce Eitman (eMVP)" <beitmannospam@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:O4cPlg$SFHA.3652@xxxxxxxxxxxxxxxxxxxxxxx
> Give us the big picture of what you are doing. What do you mean by map?
> What do you mean by "small"? How do you plan to use the memory? What do
> you mean by region?
>
> Putting the region in OEMAddressTable is a possible solution, not the
> problem that you are trying to solve. Assuming that you mean that this is
> a
> fraction of your available RAM, then I would assume that the region is
> already mapped in OEMAddressTable as part of your overall RAM, is that
> correct?
>
> --
> Bruce Eitman (eMVP)
> Senior Engineer
> beitman AT applieddata DOT net
>
> Applied Data Systems
> www.applieddata.net
> An ISO 9001:2000 Registered Company
> Microsoft WEP Gold-level Member


.

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