“Mauro DI LIDDO” <email@example.com> wrote in message
I’ve checked my different mappings : there’s no map to address
Is it possible that a QNX library for PowerPC MPC860 provides
this mapping ? ( this mapping is the complete memory address space 1:1
of our board ).
No, but now that you have privledged access, privledged mappings are
available. These mappings are normal, and you should just ignore them.
Is the ThreadCtl() ( MSR PR bit ) call gives access to the
memory without a mapping ? or disables the MMU memory protection ?
Well the MMU is still active, but when you’re a privledged thread, you have
‘special’ access to what a general user privledged thread would not.
I’ve tested my software on a QNX PC : there’s no access available to
this address space.
X86, has a different memory map than PPC - in x86 the kernel and ‘special’
areas are mapped up high, whereas the PPC has them down low.
With a PC, I always felt limited by the software available.
On Unix, I am limited only by my knowledge.
–Peter J. Schoenster <firstname.lastname@example.org>