We have a board with a P1022 and 256MB of NOR Flash.
I can program U-Boot with CodeWarrior, and step through
a lot of the initialization.
It gets through a lot of start.S and into cpu_init_early_f.
Near the end of cpu_init_early_f it calls
init_tlbs(); /* NEVER GETS HERE */
During the disable_tlb() there is an InstructionTLB trap, indicating that
the TLB for the code has been removed.
I check the TLB1 entries, just before and after. There are two entries
covering the boot area before, (LMMU2_CAM2 and LMMU2_CAM15)
and only 1 (LMMU2_CAM15) after
Interestingly, the only difference is the TS (Address Space?) value.
Any idea how I can solve this problem?
Also, I have some general questions about booting from NOR:
1) Do I need CONFIG_SPL to boot from NOR?
2) There don't seem to be any TLB entries after reset. How does
the cpu access the code without these?
3) Does Code Warrior, through a USB tap, go through the MMU when
it accesses memory, or is this bypassed.
Thanks in Advance