The polled
I/O interfaces provide the same functionality as the VIS_CONSDISPLAY
, VIS_CONSCOPY
, and VIS_CONSCURSOR
ioctl interfaces. The polled I/O interfaces are called only when the
operating system is quiesced and in standalone mode.
See Implementing Polled I/O in Console Frame Buffer Drivers for more information.
While in standalone mode, the kernel terminal emulator communicates with the console frame buffer driver through the polled I/O interfaces listed in the following table:
Polled I/O Function |
Corresponding Data Structure |
Description |
---|---|---|
(*display)() |
vis_consdisplay |
Displays pixels as a rectangle. |
(*copy)() |
vis_conscopy |
Copies a rectangle of pixels (scroll). |
(*cursor)() |
vis_conscursor |
Displays or hides a text cursor. |