From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3B85D758.572A0AD8@mvista.com> Date: Fri, 24 Aug 2001 00:26:00 -0400 From: Dan Malek MIME-Version: 1.0 To: "Marti, Felix" Cc: "'Troy Benjegerdes'" , Ralph Blach , Linix PPC Emmbedded Subject: Re: using the little endian bit 4xx mmu References: <1DF71FB881F4D311A6B700C04FA06A1AC437B4@orca.desanasystems.com> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: "Marti, Felix" wrote: > > I hacked it in a few hours: > in arch/ppc/kernel/head_4xx.S Ugh....we have discussed this in the past. What is the advantage of using this feature? All of the existing drivers and I/O macros are designed to handle mixing of endian modes depending upon the processor and I/O device. All this does is complicate a standard set of programming interfaces that everyone expects to work as they have in the past. The ability to set a feature flag in the PTE and transfer that to the TLB isn't a solution to anything. You are going to have to rewrite all of the standard functions, macros, and device drivers to utilize this feature, and we haven't seen any benefit to doing this. -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/