genfb
—
generic framebuffer console driver
genfb* at pci?
genfb* at sbus?
genfb* at intvid?
(mac68k)
genfb* at macvid?
(mac68k)
wsdisplay* at genfb?
The genfb
driver provides support for generic
framebuffers that have no native driver. All it needs are some parameters to
describe the framebuffer and an address.
When attaching to a pci(4) bus the
driver is configured via device properties:
width
(uint32
)
- Width in pixels.
height
(uint32
)
- Height in pixels.
stride
(uint32
)
- Line size in bytes.
depth
(uint32
)
- Bits per pixel.
is_console
(bool
)
- If true,
genfb
will try to become the system
console.
address
(uint32
)
- Bus address of the framebuffer.
When attaching to sbus(4) all those
parameters are retrieved from the firmware.
All those parameters are configured with Mac OS, and retrieved from the boot
loader.
There is no way to change the color map even when the firmware supports it. The
pci(4) bus frontend has only been
tested on macppc, i386, and amd64 and requires machine dependent code to pass
the properties mentioned above. So far only macppc, i386, and amd64 provides
them.