chrp mmu and booting.
benh at kernel.crashing.org
Sat Jan 24 12:06:21 EST 2004
On Sat, 2004-01-24 at 07:49, Peter Bergner wrote:
> In real mode, there is no address mapping done. When the kernel starts
> executing, we are not loaded where we were linked at, so we must be very
> careful about what we touch. You'll see in arch/ppc64/kernel/prom.c,
> that we use the RELOC() macro to access global data. It essentially
> maps the virtual/effective address the kernel expects things to be at
> to the physical address it's actually loaded at. The ppc32 kernel was
> able to remove the RELOC() macro, but for various reasons, the PPC64
> kernel is still stuck using it.
Yup :( Anton, Paulus and I have been scratching our heads to find
a way to kill it, not as simple as ppc32 but we'll eventually do it :)
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