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I'm working on adding support for a new 8349 board to U-Boot, and the processor resets if I turn on the IR bit in the MSR. This happens in function enable_addr_trans() in start.S.
enable_addr_trans: /* enable address translation */ mfmsr r5 ori r5, r5, (MSR_IR | MSR_DR) mtmsr r5 isync blr
with this code, when the "mtmsr" instruction is executed, the processor resets (or hangs - I can't tell). If I change the 4th line to:
ori r5, r5, MSR_DR
It works and U-Boot boots to a command prompt.
Since the BATs are configured the same for data and instruction, I presume the mapping is correct, but there's something wrong with turning on instruction address translation. Anyone have any ideas?
The MPC8349EMDS code in wolfgang's git is working well now. No hang. Please check your code carefully.
-Dave