On Fri, Jun 11, 2004 at 02:40:05PM -0400, Travis Sawyer wrote: > > Greetings: > > I'm attempting to bring up a new board (our custom hw) and am blowing an > Instruction TLB error in head_440.S where the original TLB for SDRAM
head_440.S indicates you are using a really old kernel. > (u-boot and initial kernel space) is invalidated after we've switched to > 0xc000_0000. What do you mean? Your u-boot port has invalidated caches? are you running out of 0xc0000000 before you get here? Which TLB entry are you executing from? > the instructions: > 3:/* iccci r0,r0 rcblach 12/19/02 clear all caches again on 1/17/03 > I took out these changes > dccci r0,r0 again clear all caches */ > cmpwi r23,62 > beq 4f > li r6,0 > tlbwe r6,r23,PPC440_TLB_PAGEID > sync By the comments, it's an IBM supplied kernel. This isn't anything in the kernel.org or linuxppc kernel trees. > The exception hits when the sync is executed. Maybe you are executing from TLB entry 62, that's one of the undocumented limitations...you can entry head_44x.S running in entry 62. > Any ideas? Can you try a current kernel tree? kernel.org 2.4 or 2.6. The IBM kernel trees are old and buggy (_buggier_). -Matt ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
