Hello!
I am working on early_malloc() for U-Boot Driver Model (this malloc is going to serve for internal DM structures during early init and it has it's minimalistic heap in global data).
My question is how to correctly switch from early allocator to full-scale malloc and when to enable caches.
The current state (on ARM) is: 1) gd = id; 3) enable_caches(); 3) mem_malloc_init();
Proposed sequence for mallocator (in order no to loose any data from old and not-relocated part of GD):
1) gd_old = gd; 2) gd = id; 3) mem_malloc_init(); 4) relocation of DM structures 5) early_malloc_disab() 6) enable_caches();
Does it make sense? It actually boils down to one fundamental question: When I have not-rellocated data locked in cache-lines, do I loose them once enable_caches() is called?
Thanks, Tomas