vgabios: Simplify scroll logic

Introduce a new function vgafb_scroll() to scroll a window on the
screen and update vgabios.c to use only that function for scrolling.
This makes the low-level vgafb_move_chars() and vgafb_clear_chars()
local to vgafb.c, and it simplifies the callers.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
3 files changed
tree: a14b9f9b3d2675b164ab47c41a5c2f660a11de27
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. docs/
  7. scripts/
  8. src/
  9. vgasrc/