RFI doesn't branch off?

Hi all,

I have a strange issue with a custom board running a 750GX on a Marvell 64360 bridge. I transferred control to the uImage via u-boot (which I had to modify for my board-specific UART and SDRAM inits, also disabling PCI).

Using the UART that's initialized by u-boot, I put some putchar()s in head.S to figure out where the kernel was freezing. It seems 'rfi' in mmu_off doesn't jump off to '__after_mmu_off' as expected. I also put some pattern into SDRAM before an after mmu_off. I just see the pattern (via a PCI interface) put before mmu_off.

The contents of SRR0 correctly point to __after_mmu_off just before the 'rfi'. However, the 'rfi' documentation says the value of SRR0 is concatenated with '0x0b00'. I don't think this should be done. Anyways, since this code is supposed to work, I'm not sure why it isn't working.

Can any u-boot initializations be causing this? I guess not, I've not touched any CPU-specific settings in u-boot.

Can anyone give me some pointers?

Thanks,
Amit.
--
Amit Shah
http://amitshah.nav.to/

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

If I keep the DR enabled in MSR, the RFI goes back properly... disabling DR causes some randomness.

--
Amit Shah
http://amitshah.nav.to/

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/