On Oct 18, 2006, at 8:10 PM, Wang Matthew-R59995 wrote: > Hi Kumar, > > Actually I do many trials about it. Vxwerks Bootrom is smaller than > U-Boot. The key difference between Bootrom and U-boot is that some > source code of Bootrom is invisible to the users. > > Actually the rfi instruction which I point out is the first rfi > instruction of Linux PowerPC bringup. > > Before that, it's TLB entry invalidation and temp TLB entry mapping. > > I check MMU setting carefully before coming Linux Kernel. > > I just want to know if other guys met similar scenario like me. I > don't > need the precise answer, just overall suggestion about it because I > understand that not everyone has the same bootloader of mine, that > bootloader is actually a customized bootloader.
I understand that, thus I was asking what exact problem you were seeing to try and help. > Anyway thank you. > > R9 point to LR register, mask the high 20 bit of r9 and send to r7, > and > then add 24, which means stride 6 instructions for rfi instruction > execution. > > Of course, rfi can switch the TLB entry, both the previous TLB > entry and > the temp TLB entry point to the same physical address. > > I've checked it. I know what the code does, I wrote it :) - kumar _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
