Module keyctrl

Driver for the PS/2 keybard/mouse controller

beyound OOStuBS:

The ‘gather’ field should NEVER have imcomplete state: it should either be a valid key, or nothing. TODO what if IO ops fails or timeout? TODO figure out how to abstract the “interrupt control” layer. Keyboard controller should not be arch dependent

Structs

• Defs 🔒
• KeyState 🔒
• KeyboardController
• KeyboardDriver
  we have a global controller, but we can’t use it as the “driver” because drivers should be stateless.
• StatusReg 🔒

Enums

• Cmd 🔒
• Msg 🔒
• Prefix 🔒

Statics

• KBCTL_GLOBAL
  this is the global keybard controller. It can only be used in prologue level, except for the gather field (consume_key is safe), which is atomic that can be safely used. (TODO maybe we can change this L3/L2 shared state abstraction)
• KEY_BUFFER