rpi2-hyp-boot icon indicating copy to clipboard operation
rpi2-hyp-boot copied to clipboard
verified publisher icon slp

I am not sure if it is an issue.

Open QHQ48 opened this issue 8 years ago • 1 comments

hi, Thanks for sharing. I can build and run well on my pi2. But, I have a problem when I want to add some code in rpi2-hyp-boot.S, after build, my board can't boot up, and nothing print out from the terminal. Even if I just add several 'nop'. Is there any limitation when I modify rpi2-hyp-boot.S ? I just add 10 'nop' before branch to 0x8000, at the line 123 : bx r4 Any help? thanks a lot

QHQ48 avatar Nov 22 '17 01:11 QHQ48

I know the reason now. Because the memory area from 0x100 to about 0x300 are changed during this coding is running. And some constant data are stored after the code area, which located just at that range, when I added 10 nop, if I add more nop to skip 0x100~0x300, the code after 0x300 can run OK.

However I still don't know who changed it, maybe GPU?

QHQ48 avatar Nov 23 '17 07:11 QHQ48