Dear Macpaul Lin,
In message AANLkTik5jU9nS=8Bx4Lf8hUZp5wyCKppuCLKGJvHJrq9@mail.gmail.com you wrote:
I have a problem about malloc() fail after the cpu has been reset. This problem I have not encountered when porting with older version of u-boot. Unfortunately I've forget which version (commit) is still work with my port (NDS32)
The problem is that, after the command "reset" under u-boot console. The cpu will do flush I/D cache , disable interrupt , redo mem_malloc_init(). Then redo the init process.
I'm not sure I understand what you mean. This shouds as if the "reset" command in U-Boot woul perform just apartial re-initialization of the software, but not a real hardware reset of the board?
Note that "reset" means a hard reset of the whole board, includine the CPU and all peripherals (similar to pressing a reset button, if there is one).
Best regards,
Wolfgang Denk