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
- completely moved MCU interrupt handling outside of the critical section
- refactored a bit of the PXI code and command names
- merge the I2C read and write cmds to be one
- remove SET_VMODE cmd, now it's always initialized to BGR565 on boot and to RGB565 on firmlaunch
- atomic-ize more stuff
- 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
- 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
- added initial SCU twiddling
- added very untested and unusable SMP code
- fixed race condition that happened on boot
- added initial MMU code (just super basic identity mapping, no caching set up or anything)
- enabled some of the fancier ARMv6 features
- reorganized ARM11 files into their own folders
- possibly more stuff I'm forgetting about
