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;
}
static void mdacon_putcs(struct vc_data *c, const unsigned short *s,
int count, int y, int x)
{
u16 *dest = MDA_ADDR(x, y);
for (; count > 0; count--) {
scr_writew(mda_convert_attr(scr_readw(s++)), dest++);
}
}
static void mdacon_clear(struct vc_data *c, int y, int x,
int height, int width)
{
u16 *dest = MDA_ADDR(x, y);
u16 eattr = mda_convert_attr(c->vc_video_erase_char);
if (width <= 0 || height <= 0)
return;
if (x==0 && width==mda_num_columns) {
scr_memsetw(dest, eattr, height*width*2);
} else {
for (; height > 0; height--, dest+=mda_num_columns)
scr_memsetw(dest, eattr, width*2);
}
}
static int mdacon_blank(struct vc_data *c, int blank, int mode_switch)
{
if (mda_type == TYPE_MDA) {
if (blank)
scr_memsetw((void *)mda_vram_base,
mda_convert_attr(c->vc_video_erase_char),
c->vc_screenbuf_size);
/* Tell console.c that it has to restore the screen itself */
return 1;
} else {
if (blank)
outb_p(0x00, mda_mode_port); /* disable video */
else
outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN,
mda_mode_port);
return 0;
}
}
static void mdacon_putc(struct vc_data *c, int ch, int y, int x)
{
scr_writew(mda_convert_attr(ch), MDA_ADDR(x, y));
}