[U-Boot] ppc4xx:DDR SDRAM test

Dear ALL

I ported u-boot-2009-11 to my custom board using ppc440EP processor. I changed amcc/bamboo BSP to run u-boot on my board.

I have some Questions and any suggestion can help me: 1. Is mtest command is sufficient for DDR SDRAM testing? 2. what is data cache status in mtest? 3. for DDR SDRAM full test, I wrote a function to generate random data and address test patterns, using random()function in stdlib.h but there is a compilation error " stdlib.h: No such file or directory" when stdlib.h is included in bamboo.c

Thank for your consideration!