Re: How to find address of OEMAddressTable?

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: K. S. Huang (ks_huang_at_alphanetworks.com.remove.this)
Date: 05/29/04 

Date: Sat, 29 May 2004 22:13:45 +0800

Sorry, in user-mode, I just find out taht
you may use the LockPages API to query its physical address...

"K. S. Huang" <ks_huang@dlink.com.tw.remove.this> 撰寫於郵件新聞
:#um4QSXREHA.3616@TK2MSFTNGP11.phx.gbl...
> if you are writing a NDIS driver, you may use the
> NdisMStartBufferPhysicalMapping to translate the NDIS Buffer Virtual
Address
> to Physical Address for DMA controller.
>
> But for other drivers or User-Mode APPs, there is no equivlant funtion!!
>
> But if you do need this feature, there might be a way to do that...
> WinCE User-Mode virtual address space is 2GB split into 64 32M sections of
> 512 64K blocks of 16 4K pages.
>
> Virtual address format:
> 3322222 222221111 1111 110000000000
> 1098765 432109876 5432 109876543210
> zSSSSSS BBBBBBBBB PPPP oooooooooooo
>
> And the kernel will keep a SectionTable that maintain all of the info. for
> the VA and Phy.
> So you could walk through the SectionTable to find out the mapping
> relationship of a specific VA.
> In user mode, you can access the SectionTable by accessing the Section
table
> pointer "UserKInfo[KINX_SECTIONS]".
>
> for further infomation, you may refer the source code of ce-shell that
under
> $(_WINCEROOT)\PRIVATE\WINCEOS\COREOS\SHELL\shell.c
>
>
> "msnews.microsoft.com" <preedee.p@eprofessional.co.th> 撰寫於郵件新聞
> :#m9LVUTREHA.1644@TK2MSFTNGP09.phx.gbl...
> > to guru
> >
> > if i wanna convert pointer of my function to physical address , is it
> > possible? how can i do? but i don't have platform builder
> > ex.
> > LPVOID x = GetPhysicalAddress(MyFunction);
> >
> > best regard.
> > if you have way may be you can send detail to me at nick@phiyada.com
> >
> > "Bruce Eitman (eMVP)" <beitmannospam@nospam.neo.rr.com> wrote in message
> > news:uzhLpHSREHA.1448@TK2MSFTNGP11.phx.gbl...
> > > Try looking at the kernel source code. OEMIoControl
> > >
> > > --
> > > Bruce Eitman (eMVP)
> > > Senior Engineer
> > >
> > >
> > >
> >
> >
>
>

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