refactors all the ugly "pendingX" atomic operations into a single "Event" subsystem/interface thing with two operations
moves all existing code to use this instead
also changes the "bkpt" macro to also indicate unreachable code
- backlight power control is reinstated but currently buggy, for some reason the __builtin_trap is tripped on GFX_powerOnBacklights and GFX_powerOffBacklights
- also refactored a bunch of other code pertaining to mcu and other hw init, moved the gpu init to a later point since lcd init now depends on mcu events
- properly performs gpu/backlight reset
- nukes vram so the initrd had to be moved to arm9 memory, and have its size (at least temporarily) limited to 256k
- reset LEDs on boot
- add code to set the notification LED
- add a PXI command to verify the NVRAM is actually online
- notify the ARM9 about the shell state through the HID thing
- circle pad simulates dpad keys (up, right, down, left)
- raw touchscreen data is provided but currently unused
- added a simple shared memory region thing
- fixed the 10ms delay to be _after_ the backlights are turned on, thanks to profi again
as always, other stuff I probably forgot about
- moved brightness control to the ARM11
- moved HID updating to the ARM11
- moved screen init from ARM9 to the ARM11, always performed unconditionally
- removed unnecessary SCREENINIT and SET_BRIGHTNESS pxi commands
and other stuff I probably forgot about
- moved common.h from the ARM9 tree to the common code tree
- does proper deinit now on the ARM11 side
the bug that caused it to fail to launch some FIRMs has been fixed - it can even boot stock FIRMs
