Subject: re: Porting to IBM Risc 6000
To: David Edelsohn <firstname.lastname@example.org>
From: matthew green <email@example.com>
Date: 08/09/2002 03:46:19
Matt> That's definitely a prep machine. the 7043-260 is a CHRP machine.
Matt> Since it uses OFW, I'll start off making it a ofppc variant (probably
Matt> called CHRP or rs6000). I'm going to start on a 32bit port first and
Matt> once that's stable long with a stable 64bit PPC toolchain, I'll move to
Matt> 64bit. When that happens, we have lots of fun things to decide...
64-bit PowerPC systems cannot boot a pure 32-bit PowerPC kernel.
Most of the kernel can remain the same and run in 32-bit mode, but the
memory management and MSR registers need to be manipulated as 64-bit
is that really logically any different that 32-bit on sparc64
hardware, where many supervisor parts are 64-bits? ie, it only
requires special assembler code, not a real 64 bit kernel?