kernel/amd64: Add initial ext scancode support

Most keyboards nowadays support extended scancodes which are multi-byte
packets prefixed with a 0xE0 byte to represent non-standard special
keys. This commit introduces the initial groundwork for supporting such
scancodes.

- i8042_drain() now takes a (nullable) pointer to a i8042 data buffer
  which will hold bytes drained

- Made some timing adjustments between i8042 register reads in the
  i8042_drain() function

- Removed nonessential and contentious locks which choked up input
  performance

Signed-off-by: Ian Moffett <ian@osmora.org>

0 files changed, 0 insertions, 0 deletions