On Wed, Oct 23, 2002 at 10:23:38AM -0700, Erik van Roode wrote: > At 09:36 10/22/2002, Branden Robinson wrote: > > >I beseech you to help debug and fix the XFree86 module loader on m68k. > > If I understand correctly the issue with 68040/68060 is cache coherency. > When looking > at the 68040 manual from Motorola, (page 4-10): > > > It is imperative that a CPUSHA instruction be executed before the > execution of the first > self-modified instruction. > > (68060 manual has identical text) > > There has been some discussion about cache flushing strategy (last > January?), and > CPUSHA is expensive, but it should fix the loader?
It would fix the loader, the expensive part is the system call overhead. CPUSH* are privileged instruction so you need a syscall for each flush. Next thing to try is to use the move16 instruction to flush the cache, but iirc there is nothing like that on 68020-30. Richard -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
