Re: high addresses & cache
Christophe Couturier wrote:[color=blue]
> Hello all,
> I'd like to access PCI memory address space located in memory at addresses
> like 0xF000 0000.
> I have some problem to access this memory area and I supose it comes from
> VxWorks cache management system. Indeed, I've been told by a friend that
> VxWorks uses the MSB of the address to determine if this space if cachable
> or not.
> Is this right?
> If yes, how can I access memory upper than 0x7FFF FFFF?
> Thanks in advance for your answers
You should describe your problem.
Could you also give us more information on the architecture you are
working: PPC, x86, SH, MIPS, ARM...
Anyway, make sure that the PCI area you intend to access is available
and correctly configured in the sysPhysMemDesc table (and/or
sysBatDescTbl is the architecture is PPC) in file sysLib.c of your
BSP. This is needed when you are working with MMU enable.