I'm trying to get a U-Boot setup working on the Pi compute module but I don't seem to be able to get device trees to be loaded by start.elf (despite using mkknlimg on my u-boot.bin). I saw that I should be able to to use vcdbg to get some information out from start.elf but I'm getting an error on that:
Do I have to change an offset or something to get this to work on the CM?
Code: Select all
sudo vcdbg log msg debug_sym: AccessVideoCoreMemory: mmap failed: Invalid argument(22) debug_sym: OpenVideoCoreMemoryFileWithOffset: ReadVideoCoreMemory @VC_SYMBOL_BASE_OFFSET (0x00002800) failed Unable to open videocore memory access: -5
Bonus question - I've been using mkknlimg from the raspberry pi tools (https://github.com/raspberrypi/tools/bl ... e/mkknlimg) will this be sufficient or do I need a more up to date version? (getting a more recent version will be my next endeavor anyway...)