On 11/7/05, zhuzhenhua zzh.hust@gmail.com wrote:

does the mips_cache_lock in cpu/mips/start.S is necessary? i got some problem to run it, if it 's not necessary, i want to remove it

You don't mention what model of MIPS you are running. I know several older parts that don't support cache line locking, so I'm not surprised that you would have trouble with that bit.

The code is locking those lines in cache to make some RAM available so that it can start to run C code (board_init_f). This allows doing a lot more of the board initialization in C rather than assembly. If you can get some ram available at this point for the stack and GOT you should be able to remove the call.