[okl4-developer] about entry point

[QUANLONG]

Hello , Okl4 developers. 
 
I have questions about okl4 1.5.2 
 
I have a board with pxa255 and I got image.boot and image.elf using 
 
./tools/build.py machine=gumstix project=iguana wombat=true 
 
I downloaded image.boot to Sdram with a Jtag debugger , and excueded it , but nothing happends. same with image.elf.
 
so I use 
 arm-linux-objcopy -O binary image.elf image.bin 
 
 and download the image.bin to 0xa0000000 and it works , 
 
here is my question 
 
(1) what's difference between image.boot and image.elf , I think image.boot is an elf file , then why i can't just download image.boot and excute it? (of course I am using a boot program to initialize my sdram, serial and flahs etc....)
 
(2) how can i change the entry point of image.elf, or image.boot ?
 I mean, I want to flash image.bin to my flash , then using the boot program to copy it to a certain sdram address such as 0xa1000000. shall I change the mahines.py file? I remember when I using nitica l4 1.2 there is an option elf_entry= 0xa1000000 , but it doesn't work with okl4_1.5.2 , is there another option? 
 
any advice would be appreciated. 
 
Best Regards.
 
전 룡
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