Scrolling in framebuffer syscons

[Phileas Fogg]

Hi,

i have a question about how the scrolling in a framebuffer syscons works.
I'm trying to speed up the syscons on the PS3 console  which is a simple 
framebuffer syscons.
It uses the renderer _gfbrndrsw_ (see dev/syscons/scgfbrndr.c) to draw into the 
framebuffer of the PS3 console.
The _gfb_draw_ function implements a simple scrolling that moves data from 
bottom to top with _vidd_copy_.
And that's where i have a problem because _vidd_copy_ calls the function 
_ps3fb_copy_ (see powerpc/ps3/ps3_syscons.c).
But the function _ps3fb_copy_ is NOT implemented yet. So, the question is how 
does the scrolling work then ?
I took a look at other syscons implementation based on a framebuffer, and almost 
all of them do NOT implement _vidd_copy_
function, e.g. XBOX syscons.

Thanks

regards