maillists@petrolhead.com writes:
Something has been troubling me for some time which is how the code manages to run before the memory controllers are configured. The assembler I can see has no accesses to memory, but the C code does, is their some magic gcc switch that makes it be entirely register based?
Unfortunately gcc's architecture does not appear to have the necessary support so I wrote romcc to do this.
It's troubled me for a while one the memories up then I'm more than happy but before that I'm a little bemused.
It is also possible to store data in the dcache if you can reliably lock in cache blocks. Your code still needs to run out of NOR flash. The PowerPC supports this. On x86 I have not seen any publicly documented and supported way to do this yet... I have done it and liked the results so much I implemented romcc.
Eric