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freebsd-dev/sys/dev/syscons/syscons.h
Bruce Evans 19dcee256f Fix the dumb and sc terminal emulators to compile and work. 
First remove ifdefs of the unsupported option SC_DUMB_TERMINAL which
prevented building using both in the same kernel and broke regression
tests.  This option will be replaced by per-emulator supported options.

The dumb emulator rotted with KSE in r83366, but usually compiled since
it is ifdefed to nothing unless SC_DUMB_TERMINAL is defined.  The type
of an unused function parameter changed.

Both emulators rotted when 2 new methods were added while the emulators
were removed.  Only null methods are needed, but null function pointers
give panics instead.

The wildcard in the default for the unsupported option SC_DFLT_TERM
never really worked.  It tends to prefer the dumb emulator when multiple
emulators are configured.  Change it to prefer scteken for compatibility.
2019-02-21 19:19:30 +00:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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_
#include <sys/kdb.h> /* XXX */
#include <sys/_lock.h>
#include <sys/_mutex.h>
/* 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 7
#endif
#ifndef SC_MOUSE_CHAR
#define SC_MOUSE_CHAR 8
#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) (((sc_ttysoftc *)tty_softc(tp))->st_index)
#define SC_DEV(sc, vty) ((sc)->dev[(vty) - (sc)->first_vty])
#define SC_STAT(tp) (*((scr_stat **)&((sc_ttysoftc *)tty_softc(tp))->st_stat))
/* 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 1920x1200 with an 8x8 font...
*/
#define COL 240
#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 and some mouse cursor attributes */
struct cursor_attr {
u_char flags;
u_char base;
u_char height;
u_char bg[3];
u_char mouse_ba;
u_char mouse_ia;
};
/* softc */
struct keyboard;
struct video_adapter;
struct scr_stat;
struct tty;
struct sc_cnstate {
u_char kbd_locked;
u_char kdb_locked;
u_char mtx_locked;
u_char kbd_opened;
u_char scr_opened;
};
typedef struct sc_softc {
int unit; /* unit # */
int config; /* configuration flags */
#define SC_VESAMODE (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 tty **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 write_in_progress;
char blink_in_progress;
int grab_level;
/* 2 is just enough for kdb to grab for stepping normal grabbing: */
struct sc_cnstate grab_state[2];
int kbd_open_level;
struct mtx video_mtx;
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];
#ifdef SC_PIXEL_MODE
u_char palette2[256 * 3];
#endif
#endif
#ifndef SC_NO_FONT_LOADING
int fonts_loaded;
#define FONT_8 2
#define FONT_14 4
#define FONT_16 8
#define FONT_22 8
u_char *font_8;
u_char *font_14;
u_char *font_16;
u_char *font_22;
#endif
u_char cursor_char;
u_char mouse_char;
#ifdef KDB
int sc_altbrk;
#endif
struct callout ctimeout;
struct callout cblink;
} 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 */
struct cursor_attr dflt_curs_attr;
struct cursor_attr base_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 */
int mouse_level; /* xterm mouse protocol */
struct proc *mouse_proc; /* proc* of controlling proc */
pid_t mouse_pid; /* pid of controlling proc */
int mouse_signal; /* signal # to report with */
const void *mouse_data; /* renderer (pixmap) data */
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;
/* TTY softc. */
typedef struct sc_ttysoftc {
int st_index;
scr_stat *st_stat;
} sc_ttysoftc;
#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 "scteken"
#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, 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 const char *sc_term_fkeystr_t(scr_stat *scp, int c);
typedef void sc_term_sync_t(scr_stat *scp);
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_fkeystr_t *te_fkeystr;
sc_term_sync_t *te_sync;
} 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 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 SC_VIDEO_LOCKINIT(sc) \
mtx_init(&(sc)->video_mtx, "syscons video lock", NULL, \
MTX_SPIN | MTX_RECURSE);
#define SC_VIDEO_LOCK(sc) \
do { \
if (!kdb_active) \
mtx_lock_spin(&(sc)->video_mtx); \
} while(0)
#define SC_VIDEO_UNLOCK(sc) \
do { \
if (!kdb_active) \
mtx_unlock_spin(&(sc)->video_mtx); \
} while(0)
/* syscons.c */
extern int (*sc_user_ioctl)(struct tty *tp, u_long cmd, caddr_t data,
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, int width,
u_char *font, int base, int count);
void sc_save_font(scr_stat *scp, int page, int size, int width,
u_char *font, int base, int count);
void sc_show_font(scr_stat *scp, int page);
void sc_touch_scrn_saver(void);
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, const u_char *p, int count);
void sc_respond(scr_stat *scp, const u_char *p,
int count, int wakeup);
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,
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,
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_support_pixel_mode(void *arg);
int sc_vid_ioctl(struct tty *tp, u_long cmd, caddr_t data,
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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