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202872e9e6
freebsd-skq/sys/dev/syscons/syscons.h
rodrigc 202872e9e6 Prevent division by zero errors in sc_mouse_move() 
by explicitly setting sc->font_width, in the same
places where sc->font_size is set, instead of
relying on the default initialized value of 0 for sc->font_width.

PR:		kern/84836
Reported by:	Andrey V. Elsukov <bu7cher at yandex dot ru>
MFC after:	2 days
2005-08-30 18:58:17 +00:00

669 lines
20 KiB
C
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/*-
* Copyright (c) 1995-1998 Søren Schmidt
* All rights reserved.
*
* This code is derived from software contributed to The DragonFly Project
* by Sascha Wildner <saw@online.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _DEV_SYSCONS_SYSCONS_H_
#define _DEV_SYSCONS_SYSCONS_H_
/* machine-dependent part of the header */
#ifdef PC98
#include <pc98/cbus/sc_machdep.h>
#elif defined(__i386__)
/* nothing for the moment */
#elif defined(__alpha__)
/* nothing for the moment */
#endif
/* default values for configuration options */
#ifndef MAXCONS
#define MAXCONS 16
#endif
#ifdef SC_NO_SYSMOUSE
#undef SC_NO_CUTPASTE
#define SC_NO_CUTPASTE 1
#endif
#ifdef SC_NO_MODE_CHANGE
#undef SC_PIXEL_MODE
#endif
/* Always load font data if the pixel (raster text) mode is to be used. */
#ifdef SC_PIXEL_MODE
#undef SC_NO_FONT_LOADING
#endif
/*
* If font data is not available, the `arrow'-shaped mouse cursor cannot
* be drawn. Use the alternative drawing method.
*/
#ifdef SC_NO_FONT_LOADING
#undef SC_ALT_MOUSE_IMAGE
#define SC_ALT_MOUSE_IMAGE 1
#endif
#ifndef SC_CURSOR_CHAR
#define SC_CURSOR_CHAR (0x07)
#endif
#ifndef SC_MOUSE_CHAR
#define SC_MOUSE_CHAR (0xd0)
#endif
#if SC_MOUSE_CHAR <= SC_CURSOR_CHAR && SC_CURSOR_CHAR < (SC_MOUSE_CHAR + 4)
#undef SC_CURSOR_CHAR
#define SC_CURSOR_CHAR (SC_MOUSE_CHAR + 4)
#endif
#ifndef SC_DEBUG_LEVEL
#define SC_DEBUG_LEVEL 0
#endif
#define DPRINTF(l, p) if (SC_DEBUG_LEVEL >= (l)) printf p
#ifndef __sparc64__
#define SC_DRIVER_NAME "sc"
#else
/*
* Use a different driver name on sparc64 so it does not get confused
* with the system controller devices which are also termed 'sc' in OFW.
*/
#define SC_DRIVER_NAME "syscons"
#endif
#define SC_VTY(dev) minor(dev)
#define SC_DEV(sc, vty) ((sc)->dev[(vty) - (sc)->first_vty])
#define SC_STAT(dev) (*((scr_stat **)&(dev)->si_drv1))
/* printable chars */
#ifndef PRINTABLE
#define PRINTABLE(ch) ((ch) > 0x1b || ((ch) > 0x0d && (ch) < 0x1b) \
|| (ch) < 0x07)
#endif
/* macros for "intelligent" screen update */
#define mark_for_update(scp, x) {\
if ((x) < scp->start) scp->start = (x);\
else if ((x) > scp->end) scp->end = (x);\
}
#define mark_all(scp) {\
scp->start = 0;\
scp->end = scp->xsize * scp->ysize - 1;\
}
/* vty status flags (scp->status) */
#define UNKNOWN_MODE 0x00010 /* unknown video mode */
#define SWITCH_WAIT_REL 0x00080 /* waiting for vty release */
#define SWITCH_WAIT_ACQ 0x00100 /* waiting for vty ack */
#define BUFFER_SAVED 0x00200 /* vty buffer is saved */
#define CURSOR_ENABLED 0x00400 /* text cursor is enabled */
#define MOUSE_MOVED 0x01000 /* mouse cursor has moved */
#define MOUSE_CUTTING 0x02000 /* mouse cursor is cutting text */
#define MOUSE_VISIBLE 0x04000 /* mouse cursor is showing */
#define GRAPHICS_MODE 0x08000 /* vty is in a graphics mode */
#define PIXEL_MODE 0x10000 /* vty is in a raster text mode */
#define SAVER_RUNNING 0x20000 /* screen saver is running */
#define VR_CURSOR_BLINK 0x40000 /* blinking text cursor */
#define VR_CURSOR_ON 0x80000 /* text cursor is on */
#define MOUSE_HIDDEN 0x100000 /* mouse cursor is temporarily hidden */
/* misc defines */
#define FALSE 0
#define TRUE 1
/*
The following #defines are hard-coded for a maximum text
resolution corresponding to a maximum framebuffer
resolution of 1600x1200 with an 8x8 font...
*/
#define COL 200
#define ROW 150
#define PCBURST 128
#ifndef BELL_DURATION
#define BELL_DURATION ((5 * hz + 99) / 100)
#define BELL_PITCH 800
#endif
/* virtual terminal buffer */
typedef struct sc_vtb {
int vtb_flags;
#define VTB_VALID (1 << 0)
#define VTB_ALLOCED (1 << 1)
int vtb_type;
#define VTB_INVALID 0
#define VTB_MEMORY 1
#define VTB_FRAMEBUFFER 2
#define VTB_RINGBUFFER 3
int vtb_cols;
int vtb_rows;
int vtb_size;
vm_offset_t vtb_buffer;
int vtb_tail; /* valid for VTB_RINGBUFFER only */
} sc_vtb_t;
/* text cursor attributes */
struct cursor_attr {
int flags;
int base;
int height;
};
/* softc */
struct keyboard;
struct video_adapter;
struct scr_stat;
struct tty;
typedef struct sc_softc {
int unit; /* unit # */
int config; /* configuration flags */
#define SC_VESA800X600 (1 << 7)
#define SC_AUTODETECT_KBD (1 << 8)
#define SC_KERNEL_CONSOLE (1 << 9)
int flags; /* status flags */
#define SC_VISUAL_BELL (1 << 0)
#define SC_QUIET_BELL (1 << 1)
#if 0 /* not used anymore */
#define SC_BLINK_CURSOR (1 << 2)
#define SC_CHAR_CURSOR (1 << 3)
#endif
#define SC_MOUSE_ENABLED (1 << 4)
#define SC_SCRN_IDLE (1 << 5)
#define SC_SCRN_BLANKED (1 << 6)
#define SC_SAVER_FAILED (1 << 7)
#define SC_SCRN_VTYLOCK (1 << 8)
#define SC_INIT_DONE (1 << 16)
#define SC_SPLASH_SCRN (1 << 17)
int keyboard; /* -1 if unavailable */
struct keyboard *kbd;
int adapter;
struct video_adapter *adp;
int initial_mode; /* initial video mode */
int first_vty;
int vtys;
struct cdev **dev;
struct scr_stat *cur_scp;
struct scr_stat *new_scp;
struct scr_stat *old_scp;
int delayed_next_scr;
char font_loading_in_progress;
char switch_in_progress;
char videoio_in_progress;
char write_in_progress;
char blink_in_progress;
long scrn_time_stamp;
struct cursor_attr dflt_curs_attr;
struct cursor_attr curs_attr;
u_char scr_map[256];
u_char scr_rmap[256];
#ifdef _SC_MD_SOFTC_DECLARED_
sc_md_softc_t md; /* machine dependent vars */
#endif
#ifndef SC_NO_PALETTE_LOADING
u_char palette[256*3];
#endif
#ifndef SC_NO_FONT_LOADING
int fonts_loaded;
#define FONT_8 2
#define FONT_14 4
#define FONT_16 8
u_char *font_8;
u_char *font_14;
u_char *font_16;
#endif
u_char cursor_char;
u_char mouse_char;
} sc_softc_t;
/* virtual screen */
typedef struct scr_stat {
int index; /* index of this vty */
struct sc_softc *sc; /* pointer to softc */
struct sc_rndr_sw *rndr; /* renderer */
#ifndef __sparc64__
sc_vtb_t scr;
#endif
sc_vtb_t vtb;
int xpos; /* current X position */
int ypos; /* current Y position */
int xsize; /* X text size */
int ysize; /* Y text size */
int xpixel; /* X graphics size */
int ypixel; /* Y graphics size */
int xoff; /* X offset in pixel mode */
int yoff; /* Y offset in pixel mode */
u_char *font; /* current font */
int font_size; /* fontsize in Y direction */
int font_width; /* fontsize in X direction */
int start; /* modified area start */
int end; /* modified area end */
struct sc_term_sw *tsw;
void *ts;
int status; /* status (bitfield) */
int kbd_mode; /* keyboard I/O mode */
int cursor_pos; /* cursor buffer position */
int cursor_oldpos; /* cursor old buffer position */
u_short cursor_saveunder_char; /* saved char under cursor */
u_short cursor_saveunder_attr; /* saved attr under cursor */
struct cursor_attr dflt_curs_attr;
struct cursor_attr curr_curs_attr;
struct cursor_attr curs_attr;
int mouse_pos; /* mouse buffer position */
int mouse_oldpos; /* mouse old buffer position */
short mouse_xpos; /* mouse x coordinate */
short mouse_ypos; /* mouse y coordinate */
short mouse_oldxpos; /* mouse previous x coordinate */
short mouse_oldypos; /* mouse previous y coordinate */
short mouse_buttons; /* mouse buttons */
int mouse_cut_start; /* mouse cut start pos */
int mouse_cut_end; /* mouse cut end pos */
struct proc *mouse_proc; /* proc* of controlling proc */
pid_t mouse_pid; /* pid of controlling proc */
int mouse_signal; /* signal # to report with */
u_short bell_duration;
u_short bell_pitch;
u_char border; /* border color */
int mode; /* mode */
pid_t pid; /* pid of controlling proc */
struct proc *proc; /* proc* of controlling proc */
struct vt_mode smode; /* switch mode */
sc_vtb_t *history; /* circular history buffer */
int history_pos; /* position shown on screen */
int history_size; /* size of history buffer */
int splash_save_mode; /* saved mode for splash screen */
int splash_save_status; /* saved status for splash screen */
#ifdef _SCR_MD_STAT_DECLARED_
scr_md_stat_t md; /* machine dependent vars */
#endif
} scr_stat;
#ifndef SC_NORM_ATTR
#define SC_NORM_ATTR (FG_LIGHTGREY | BG_BLACK)
#endif
#ifndef SC_NORM_REV_ATTR
#define SC_NORM_REV_ATTR (FG_BLACK | BG_LIGHTGREY)
#endif
#ifndef SC_KERNEL_CONS_ATTR
#define SC_KERNEL_CONS_ATTR (FG_WHITE | BG_BLACK)
#endif
#ifndef SC_KERNEL_CONS_REV_ATTR
#define SC_KERNEL_CONS_REV_ATTR (FG_BLACK | BG_LIGHTGREY)
#endif
/* terminal emulator */
#ifndef SC_DFLT_TERM
#define SC_DFLT_TERM "*" /* any */
#endif
typedef int sc_term_init_t(scr_stat *scp, void **tcp, int code);
#define SC_TE_COLD_INIT 0
#define SC_TE_WARM_INIT 1
typedef int sc_term_term_t(scr_stat *scp, void **tcp);
typedef void sc_term_puts_t(scr_stat *scp, u_char *buf, int len);
typedef int sc_term_ioctl_t(scr_stat *scp, struct tty *tp, u_long cmd,
caddr_t data, int flag, struct thread *td);
typedef int sc_term_reset_t(scr_stat *scp, int code);
#define SC_TE_HARD_RESET 0
#define SC_TE_SOFT_RESET 1
typedef void sc_term_default_attr_t(scr_stat *scp, int norm, int rev);
typedef void sc_term_clear_t(scr_stat *scp);
typedef void sc_term_notify_t(scr_stat *scp, int event);
#define SC_TE_NOTIFY_VTSWITCH_IN 0
#define SC_TE_NOTIFY_VTSWITCH_OUT 1
typedef int sc_term_input_t(scr_stat *scp, int c, struct tty *tp);
typedef struct sc_term_sw {
LIST_ENTRY(sc_term_sw) link;
char *te_name; /* name of the emulator */
char *te_desc; /* description */
char *te_renderer; /* matching renderer */
size_t te_size; /* size of internal buffer */
int te_refcount; /* reference counter */
sc_term_init_t *te_init;
sc_term_term_t *te_term;
sc_term_puts_t *te_puts;
sc_term_ioctl_t *te_ioctl;
sc_term_reset_t *te_reset;
sc_term_default_attr_t *te_default_attr;
sc_term_clear_t *te_clear;
sc_term_notify_t *te_notify;
sc_term_input_t *te_input;
} sc_term_sw_t;
#define SCTERM_MODULE(name, sw) \
DATA_SET(scterm_set, sw); \
static int \
scterm_##name##_event(module_t mod, int type, void *data) \
{ \
switch (type) { \
case MOD_LOAD: \
return sc_term_add(&sw); \
case MOD_UNLOAD: \
if (sw.te_refcount > 0) \
return EBUSY; \
return sc_term_remove(&sw); \
default: \
return EOPNOTSUPP; \
break; \
} \
return 0; \
} \
static moduledata_t scterm_##name##_mod = { \
"scterm-" #name, \
scterm_##name##_event, \
NULL, \
}; \
DECLARE_MODULE(scterm_##name, scterm_##name##_mod, \
SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
/* renderer function table */
typedef void vr_init_t(scr_stat *scp);
typedef void vr_clear_t(scr_stat *scp, int c, int attr);
typedef void vr_draw_border_t(scr_stat *scp, int color);
typedef void vr_draw_t(scr_stat *scp, int from, int count, int flip);
typedef void vr_set_cursor_t(scr_stat *scp, int base, int height, int blink);
typedef void vr_draw_cursor_t(scr_stat *scp, int at, int blink,
int on, int flip);
typedef void vr_blink_cursor_t(scr_stat *scp, int at, int flip);
typedef void vr_set_mouse_t(scr_stat *scp);
typedef void vr_draw_mouse_t(scr_stat *scp, int x, int y, int on);
typedef struct sc_rndr_sw {
vr_init_t *init;
vr_clear_t *clear;
vr_draw_border_t *draw_border;
vr_draw_t *draw;
vr_set_cursor_t *set_cursor;
vr_draw_cursor_t *draw_cursor;
vr_blink_cursor_t *blink_cursor;
vr_set_mouse_t *set_mouse;
vr_draw_mouse_t *draw_mouse;
} sc_rndr_sw_t;
typedef struct sc_renderer {
char *name;
int mode;
sc_rndr_sw_t *rndrsw;
LIST_ENTRY(sc_renderer) link;
} sc_renderer_t;
#define RENDERER(name, mode, sw, set) \
static struct sc_renderer scrndr_##name##_##mode = { \
#name, mode, &sw \
}; \
DATA_SET(scrndr_set, scrndr_##name##_##mode); \
DATA_SET(set, scrndr_##name##_##mode)
#define RENDERER_MODULE(name, set) \
SET_DECLARE(set, sc_renderer_t); \
static int \
scrndr_##name##_event(module_t mod, int type, void *data) \
{ \
sc_renderer_t **list; \
int error = 0; \
switch (type) { \
case MOD_LOAD: \
SET_FOREACH(list, set) { \
error = sc_render_add(*list); \
if (error) \
break; \
} \
break; \
case MOD_UNLOAD: \
SET_FOREACH(list, set) { \
error = sc_render_remove(*list);\
if (error) \
break; \
} \
break; \
default: \
return EOPNOTSUPP; \
break; \
} \
return error; \
} \
static moduledata_t scrndr_##name##_mod = { \
"scrndr-" #name, \
scrndr_##name##_event, \
NULL, \
}; \
DECLARE_MODULE(scrndr_##name, scrndr_##name##_mod, \
SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
typedef struct {
int cursor_start;
int cursor_end;
int shift_state;
int bell_pitch;
} bios_values_t;
/* other macros */
#define ISTEXTSC(scp) (!((scp)->status \
& (UNKNOWN_MODE | GRAPHICS_MODE | PIXEL_MODE)))
#define ISGRAPHSC(scp) (((scp)->status \
& (UNKNOWN_MODE | GRAPHICS_MODE)))
#define ISPIXELSC(scp) (((scp)->status \
& (UNKNOWN_MODE | GRAPHICS_MODE | PIXEL_MODE))\
== PIXEL_MODE)
#define ISUNKNOWNSC(scp) ((scp)->status & UNKNOWN_MODE)
#define ISMOUSEAVAIL(af) ((af) & V_ADP_FONT)
#define ISFONTAVAIL(af) ((af) & V_ADP_FONT)
#define ISPALAVAIL(af) ((af) & V_ADP_PALETTE)
#define ISSIGVALID(sig) ((sig) > 0 && (sig) < NSIG)
#define kbd_read_char(kbd, wait) \
(*kbdsw[(kbd)->kb_index]->read_char)((kbd), (wait))
#define kbd_check_char(kbd) \
(*kbdsw[(kbd)->kb_index]->check_char)((kbd))
#define kbd_enable(kbd) \
(*kbdsw[(kbd)->kb_index]->enable)((kbd))
#define kbd_disable(kbd) \
(*kbdsw[(kbd)->kb_index]->disable)((kbd))
#define kbd_lock(kbd, lockf) \
(*kbdsw[(kbd)->kb_index]->lock)((kbd), (lockf))
#define kbd_ioctl(kbd, cmd, arg) \
(((kbd) == NULL) ? \
ENODEV : (*kbdsw[(kbd)->kb_index]->ioctl)((kbd), (cmd), (arg)))
#define kbd_clear_state(kbd) \
(*kbdsw[(kbd)->kb_index]->clear_state)((kbd))
#define kbd_get_fkeystr(kbd, fkey, len) \
(*kbdsw[(kbd)->kb_index]->get_fkeystr)((kbd), (fkey), (len))
#define kbd_poll(kbd, on) \
(*kbdsw[(kbd)->kb_index]->poll)((kbd), (on))
/* syscons.c */
extern int (*sc_user_ioctl)(struct cdev *dev, u_long cmd, caddr_t data,
int flag, struct thread *td);
int sc_probe_unit(int unit, int flags);
int sc_attach_unit(int unit, int flags);
int set_mode(scr_stat *scp);
void sc_set_border(scr_stat *scp, int color);
void sc_load_font(scr_stat *scp, int page, int size, u_char *font,
int base, int count);
void sc_save_font(scr_stat *scp, int page, int size, u_char *font,
int base, int count);
void sc_show_font(scr_stat *scp, int page);
void sc_touch_scrn_saver(void);
void sc_puts(scr_stat *scp, u_char *buf, int len);
void sc_draw_cursor_image(scr_stat *scp);
void sc_remove_cursor_image(scr_stat *scp);
void sc_set_cursor_image(scr_stat *scp);
void sc_change_cursor_shape(scr_stat *scp, int flags,
int base, int height);
int sc_clean_up(scr_stat *scp);
int sc_switch_scr(sc_softc_t *sc, u_int next_scr);
void sc_alloc_scr_buffer(scr_stat *scp, int wait, int discard);
int sc_init_emulator(scr_stat *scp, char *name);
void sc_paste(scr_stat *scp, u_char *p, int count);
void sc_bell(scr_stat *scp, int pitch, int duration);
/* schistory.c */
#ifndef SC_NO_HISTORY
int sc_alloc_history_buffer(scr_stat *scp, int lines,
int prev_ysize, int wait);
void sc_free_history_buffer(scr_stat *scp, int prev_ysize);
void sc_hist_save(scr_stat *scp);
#define sc_hist_save_one_line(scp, from) \
sc_vtb_append(&(scp)->vtb, (from), (scp)->history, (scp)->xsize)
int sc_hist_restore(scr_stat *scp);
void sc_hist_home(scr_stat *scp);
void sc_hist_end(scr_stat *scp);
int sc_hist_up_line(scr_stat *scp);
int sc_hist_down_line(scr_stat *scp);
int sc_hist_ioctl(struct tty *tp, u_long cmd, caddr_t data,
int flag, struct thread *td);
#endif /* SC_NO_HISTORY */
/* scmouse.c */
#ifndef SC_NO_CUTPASTE
void sc_alloc_cut_buffer(scr_stat *scp, int wait);
void sc_draw_mouse_image(scr_stat *scp);
void sc_remove_mouse_image(scr_stat *scp);
int sc_inside_cutmark(scr_stat *scp, int pos);
void sc_remove_cutmarking(scr_stat *scp);
void sc_remove_all_cutmarkings(sc_softc_t *scp);
void sc_remove_all_mouse(sc_softc_t *scp);
void sc_mouse_paste(scr_stat *scp);
#else
#define sc_draw_mouse_image(scp)
#define sc_remove_mouse_image(scp)
#define sc_inside_cutmark(scp, pos) FALSE
#define sc_remove_cutmarking(scp)
#define sc_remove_all_cutmarkings(scp)
#define sc_remove_all_mouse(scp)
#define sc_mouse_paste(scp)
#endif /* SC_NO_CUTPASTE */
#ifndef SC_NO_SYSMOUSE
void sc_mouse_move(scr_stat *scp, int x, int y);
int sc_mouse_ioctl(struct tty *tp, u_long cmd, caddr_t data,
int flag, struct thread *td);
#endif /* SC_NO_SYSMOUSE */
/* scvidctl.c */
int sc_set_text_mode(scr_stat *scp, struct tty *tp, int mode,
int xsize, int ysize, int fontsize,
int font_width);
int sc_set_graphics_mode(scr_stat *scp, struct tty *tp, int mode);
int sc_set_pixel_mode(scr_stat *scp, struct tty *tp, int xsize,
int ysize, int fontsize, int font_width);
int sc_vid_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag,
struct thread *td);
int sc_render_add(sc_renderer_t *rndr);
int sc_render_remove(sc_renderer_t *rndr);
sc_rndr_sw_t *sc_render_match(scr_stat *scp, char *name, int mode);
/* scvtb.c */
void sc_vtb_init(sc_vtb_t *vtb, int type, int cols, int rows,
void *buffer, int wait);
void sc_vtb_destroy(sc_vtb_t *vtb);
size_t sc_vtb_size(int cols, int rows);
void sc_vtb_clear(sc_vtb_t *vtb, int c, int attr);
int sc_vtb_getc(sc_vtb_t *vtb, int at);
int sc_vtb_geta(sc_vtb_t *vtb, int at);
void sc_vtb_putc(sc_vtb_t *vtb, int at, int c, int a);
vm_offset_t sc_vtb_putchar(sc_vtb_t *vtb, vm_offset_t p, int c, int a);
vm_offset_t sc_vtb_pointer(sc_vtb_t *vtb, int at);
int sc_vtb_pos(sc_vtb_t *vtb, int pos, int offset);
#define sc_vtb_tail(vtb) ((vtb)->vtb_tail)
#define sc_vtb_rows(vtb) ((vtb)->vtb_rows)
#define sc_vtb_cols(vtb) ((vtb)->vtb_cols)
void sc_vtb_copy(sc_vtb_t *vtb1, int from, sc_vtb_t *vtb2, int to,
int count);
void sc_vtb_append(sc_vtb_t *vtb1, int from, sc_vtb_t *vtb2,
int count);
void sc_vtb_seek(sc_vtb_t *vtb, int pos);
void sc_vtb_erase(sc_vtb_t *vtb, int at, int count, int c, int attr);
void sc_vtb_move(sc_vtb_t *vtb, int from, int to, int count);
void sc_vtb_delete(sc_vtb_t *vtb, int at, int count, int c, int attr);
void sc_vtb_ins(sc_vtb_t *vtb, int at, int count, int c, int attr);
/* sysmouse.c */
int sysmouse_event(mouse_info_t *info);
/* scterm.c */
void sc_move_cursor(scr_stat *scp, int x, int y);
void sc_clear_screen(scr_stat *scp);
int sc_term_add(sc_term_sw_t *sw);
int sc_term_remove(sc_term_sw_t *sw);
sc_term_sw_t *sc_term_match(char *name);
sc_term_sw_t *sc_term_match_by_number(int index);
/* machine dependent functions */
int sc_max_unit(void);
sc_softc_t *sc_get_softc(int unit, int flags);
sc_softc_t *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd);
int sc_get_cons_priority(int *unit, int *flags);
void sc_get_bios_values(bios_values_t *values);
int sc_tone(int herz);
#endif /* !_DEV_SYSCONS_SYSCONS_H_ */
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