On Tue, 2008-09-30 at 09:57 -0700, Tirumala Reddy Marri wrote: > Ben, > Thanks for the response. I am wondering how user space would get > affected by absence of L1 Dcache.
You didn't answer my question :-) Well, as I said, things like lwarx/stwcx not working, dcbz taking alignment exceptions, etc... Ben. > Thanks, > Marri > > -----Original Message----- > From: Benjamin Herrenschmidt [mailto:[EMAIL PROTECTED] > Sent: Tuesday, September 30, 2008 12:16 AM > To: Tirumala Reddy Marri > Cc: Olof Johansson; [email protected] > Subject: RE: Disabling L1 D-cache and side effects > > On Mon, 2008-09-29 at 14:38 -0700, Tirumala Reddy Marri wrote: > > Could you please point me to the which does the Critical error > > (Machine > > Check) recovery. BTW I am successful booting the Linux until rootfs is > > > being mounted. It fails to mount the Linux saying that blocks are > > corrupted in file system. I had to modify lots of initial bring up > > code to disable D-cache and make sure all TLB's are cache inhibited. > > Ando also made sure none of the misc_32.S , entry_32.S and head.S > > makes any references to d-cache. > > Why the heck are you doing that btw ? AFAIK, as Olof says, things like > atomic operations will not work, dcbz neither etc... it's likely that > even if you manage to plaster around all of this in the kernel, whatever > userspace code you'll try to run in userspace will blow up too... > > Cheers, > Ben. _______________________________________________ Linuxppc-dev mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-dev
