Relocating bootwrapper causes kernel panic

[Shawn Jin]

> I'm trying to relocate the bootwrapper from the default address
> (0x400000) to a higher address (e.g. 0x800000) in order to support a
> larger than 4MB initramfs. However the kernel panic when trying to
> access the device tree blob which was relocated accordingly to a
> higher address. The kernel message from __log_buf is shown below.
>
> The flat tree located at 0xbe4300 as the kerne message showed. Why
> cannot the kernel access this area? No TLB set for this area?
>
> <1>Unable to handle kernel paging request for data at address 0xc0be4308
> <1>Faulting instruction address: 0xc01fdabc
> <4>Oops: Kernel access of bad area, sig: 11 [#1]

Before the flat tree was accessed, I checked the DTLB and didn't find
any entry related to 0xc0be4300. After the exception, I found the
following DTLBs.

30 : 02  c0be4000   4KB ------ -> 00000000
31 : 00  fa000000   8MB VI-S-M -> fa000000

The DTLB#30 doesn't seem right. Why would it map to 0x0? I think this
should be something like 00be4000?

Thanks,
-Shawn.