static void mdacon_bmove(struct vc_data *c, int sy, int sx,
int dy, int dx, int height, int width)
{
u16 *src, *dest;
if (width <= 0 || height <= 0)
return;
if (sx==0 && dx==0 && width==mda_num_columns) {
scr_memmovew(MDA_ADDR(0,dy), MDA_ADDR(0,sy), height*width*2);
} else if (dy < sy || (dy == sy && dx < sx)) {
src = MDA_ADDR(sx, sy);
dest = MDA_ADDR(dx, dy);
for (; height > 0; height--) {
scr_memmovew(dest, src, width*2);
src += mda_num_columns;
dest += mda_num_columns;
}
} else {
src = MDA_ADDR(sx, sy+height-1);
dest = MDA_ADDR(dx, dy+height-1);
for (; height > 0; height--) {
scr_memmovew(dest, src, width*2);
src -= mda_num_columns;
dest -= mda_num_columns;
}
}
}
static int mdacon_scroll(struct vc_data *c, int t, int b, int dir, int lines)
{
u16 eattr = mda_convert_attr(c->vc_scrl_erase_char);
if (!lines)
return 0;
if (lines > c->vc_rows) /* maximum realistic size */
lines = c->vc_rows;
switch (dir) {
case SM_UP:
scr_memmovew(MDA_ADDR(0,t), MDA_ADDR(0,t+lines),
(b-t-lines)*mda_num_columns*2);
scr_memsetw(MDA_ADDR(0,b-lines), eattr,
lines*mda_num_columns*2);
break;
case SM_DOWN:
scr_memmovew(MDA_ADDR(0,t+lines), MDA_ADDR(0,t),
(b-t-lines)*mda_num_columns*2);
scr_memsetw(MDA_ADDR(0,t), eattr, lines*mda_num_columns*2);
break;
}
return 0;
}
static bool mdacon_scroll(struct vc_data *c, unsigned int t, unsigned int b,
enum con_scroll dir, unsigned int lines)
{
u16 eattr = mda_convert_attr(c->vc_video_erase_char);
if (!lines)
return false;
if (lines > c->vc_rows) /* maximum realistic size */
lines = c->vc_rows;
switch (dir) {
case SM_UP:
scr_memmovew(mda_addr(0, t), mda_addr(0, t + lines),
(b-t-lines)*mda_num_columns*2);
scr_memsetw(mda_addr(0, b - lines), eattr,
lines*mda_num_columns*2);
break;
case SM_DOWN:
scr_memmovew(mda_addr(0, t + lines), mda_addr(0, t),
(b-t-lines)*mda_num_columns*2);
scr_memsetw(mda_addr(0, t), eattr, lines*mda_num_columns*2);
break;
}
return false;
}