e423230b0d
Outputting a backspace isn't supposed to be destructive.. It isn't on most terminals, nor on the standard bios output (vs. TERM_EMU mode)
628 lines
12 KiB
C
628 lines
12 KiB
C
/*
|
|
* Copyright (c) 1998 Michael Smith (msmith@freebsd.org)
|
|
* Copyright (c) 1997 Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp)
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* From Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp
|
|
*
|
|
* $Id: vidconsole.c,v 1.10 1998/12/31 13:44:04 abial Exp $
|
|
*/
|
|
|
|
#include <stand.h>
|
|
#include <bootstrap.h>
|
|
#include <btxv86.h>
|
|
#include <machine/psl.h>
|
|
#include "libi386.h"
|
|
|
|
#if KEYBOARD_PROBE
|
|
#include <machine/cpufunc.h>
|
|
|
|
static int probe_keyboard(void);
|
|
#endif
|
|
static void vidc_probe(struct console *cp);
|
|
static int vidc_init(int arg);
|
|
static void vidc_putchar(int c);
|
|
static int vidc_getchar(void);
|
|
static int vidc_ischar(void);
|
|
|
|
static int vidc_started;
|
|
|
|
#ifdef TERM_EMU
|
|
void end_term();
|
|
void bail_out(int c);
|
|
void vidc_term_emu(int c);
|
|
void get_pos(void);
|
|
void curs_move(int x, int y);
|
|
void write_char(int c, int fg, int bg);
|
|
void scroll_up(int rows, int fg, int bg);
|
|
void AB(void);
|
|
void AF(void);
|
|
void CD(void);
|
|
void CM(void);
|
|
void HO(void);
|
|
void ME(void);
|
|
|
|
static int args[2],argc,br;
|
|
static int fg,bg,dig;
|
|
static int fg_c,bg_c,curx,cury;
|
|
static int esc;
|
|
#endif
|
|
|
|
|
|
struct console vidconsole = {
|
|
"vidconsole",
|
|
"internal video/keyboard",
|
|
0,
|
|
vidc_probe,
|
|
vidc_init,
|
|
vidc_putchar,
|
|
vidc_getchar,
|
|
vidc_ischar
|
|
};
|
|
|
|
static void
|
|
vidc_probe(struct console *cp)
|
|
{
|
|
|
|
/* look for a keyboard */
|
|
#if KEYBOARD_PROBE
|
|
if (probe_keyboard())
|
|
#endif
|
|
{
|
|
|
|
cp->c_flags |= C_PRESENTIN;
|
|
}
|
|
|
|
/* XXX for now, always assume we can do BIOS screen output */
|
|
cp->c_flags |= C_PRESENTOUT;
|
|
}
|
|
|
|
static int
|
|
vidc_init(int arg)
|
|
{
|
|
int i;
|
|
|
|
if (vidc_started && arg == 0)
|
|
return;
|
|
vidc_started = 1;
|
|
#ifdef TERM_EMU
|
|
/* Init terminal emulator */
|
|
end_term();
|
|
get_pos();
|
|
curs_move(curx,cury);
|
|
fg_c=7;
|
|
bg_c=0;
|
|
#endif
|
|
for(i = 0; i < 10 && vidc_ischar(); i++)
|
|
(void)vidc_getchar();
|
|
return(0); /* XXX reinit? */
|
|
}
|
|
|
|
static void
|
|
vidc_biosputchar(int c)
|
|
{
|
|
v86.ctl = 0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0xe00 | (c & 0xff);
|
|
v86.ebx = 0x7;
|
|
v86int();
|
|
}
|
|
|
|
static void
|
|
vidc_rawputchar(int c)
|
|
{
|
|
int i;
|
|
|
|
if(c == '\t')
|
|
/* lame tab expansion */
|
|
for (i = 0; i < 8; i++)
|
|
vidc_rawputchar(' ');
|
|
else {
|
|
#ifndef TERM_EMU
|
|
vidc_biosputchar(c);
|
|
#else
|
|
/* Emulate AH=0eh (teletype output) */
|
|
switch(c) {
|
|
case '\a':
|
|
vidc_biosputchar(c);
|
|
return;
|
|
case '\r':
|
|
curx=0;
|
|
curs_move(curx,cury);
|
|
return;
|
|
case '\n':
|
|
cury++;
|
|
if(cury>24) {
|
|
scroll_up(1,fg_c,bg_c);
|
|
cury--;
|
|
} else {
|
|
curs_move(curx,cury);
|
|
}
|
|
return;
|
|
case '\b':
|
|
if(curx>0) {
|
|
curx--;
|
|
curs_move(curx,cury);
|
|
/* write_char(' ',fg_c,bg_c); XXX destructive(!) */
|
|
return;
|
|
}
|
|
return;
|
|
default:
|
|
write_char(c,fg_c,bg_c);
|
|
curx++;
|
|
if(curx>79) {
|
|
curx=0;
|
|
cury++;
|
|
}
|
|
if(cury>24) {
|
|
curx=0;
|
|
scroll_up(1,fg_c,bg_c);
|
|
cury--;
|
|
}
|
|
}
|
|
curs_move(curx,cury);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#ifdef TERM_EMU
|
|
|
|
/* Get cursor position on the screen. Result is in edx. Sets
|
|
* curx and cury appropriately.
|
|
*/
|
|
void
|
|
get_pos(void)
|
|
{
|
|
v86.ctl = 0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0300;
|
|
v86.ebx = 0x0;
|
|
v86int();
|
|
curx=v86.edx & 0x00ff;
|
|
cury=(v86.edx & 0xff00)>>8;
|
|
}
|
|
|
|
/* Move cursor to x rows and y cols (0-based). */
|
|
void
|
|
curs_move(int x, int y)
|
|
{
|
|
v86.ctl = 0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0200;
|
|
v86.ebx = 0x0;
|
|
v86.edx = ((0x00ff & y)<<8)+(0x00ff & x);
|
|
v86int();
|
|
curx=x;
|
|
cury=y;
|
|
/* If there is ctrl char at this position, cursor would be invisible.
|
|
* Make it a space instead.
|
|
*/
|
|
v86.ctl=0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0800;
|
|
v86.ebx= 0x0;
|
|
v86int();
|
|
#define isvisible(c) (((c)>32) && ((c)<255))
|
|
if(!isvisible(v86.eax & 0x00ff)) {
|
|
write_char(' ',fg_c,bg_c);
|
|
}
|
|
}
|
|
|
|
/* Scroll up the whole window by a number of rows. If rows==0,
|
|
* clear the window. fg and bg are attributes for the new lines
|
|
* inserted in the window.
|
|
*/
|
|
void
|
|
scroll_up(int rows, int fg, int bg)
|
|
{
|
|
if(rows==0) rows=25;
|
|
v86.ctl = 0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0600+(0x00ff & rows);
|
|
v86.ebx = (bg<<12)+(fg<<8);
|
|
v86.ecx = 0x0;
|
|
v86.edx = 0x184f;
|
|
v86int();
|
|
}
|
|
|
|
/* Write character and attribute at cursor position. */
|
|
void
|
|
write_char(int c, int fg, int bg)
|
|
{
|
|
v86.ctl=0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0900+(0x00ff & c);
|
|
v86.ebx = (bg<<4)+fg;
|
|
v86.ecx = 0x1;
|
|
v86int();
|
|
}
|
|
|
|
/* Calculate power of 10 */
|
|
int
|
|
pow10(int i)
|
|
{
|
|
int res=1;
|
|
|
|
while(i-->0) {
|
|
res*=10;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**************************************************************/
|
|
/*
|
|
* Screen manipulation functions. They use accumulated data in
|
|
* args[] and argc variables.
|
|
*
|
|
*/
|
|
|
|
/* Set background color */
|
|
void
|
|
AB(void){
|
|
bg_c=args[0];
|
|
end_term();
|
|
}
|
|
|
|
/* Set foreground color */
|
|
void
|
|
AF(void)
|
|
{
|
|
fg_c=args[0];
|
|
end_term();
|
|
}
|
|
|
|
/* Clear display from current position to end of screen */
|
|
void
|
|
CD(void)
|
|
{
|
|
get_pos();
|
|
v86.ctl = 0;
|
|
v86.addr = 0x10;
|
|
v86.eax = 0x0600;
|
|
v86.ebx = (bg_c<<4)+fg_c;
|
|
v86.ecx = v86.edx;
|
|
v86.edx = 0x184f;
|
|
v86int();
|
|
curx=0;
|
|
curs_move(curx,cury);
|
|
end_term();
|
|
}
|
|
|
|
/* Absolute cursor move to args[0] rows and args[1] columns
|
|
* (the coordinates are 1-based).
|
|
*/
|
|
void
|
|
CM(void)
|
|
{
|
|
if(args[0]>0) args[0]--;
|
|
if(args[1]>0) args[1]--;
|
|
curs_move(args[1],args[0]);
|
|
end_term();
|
|
}
|
|
|
|
/* Home cursor (left top corner) */
|
|
void
|
|
HO(void)
|
|
{
|
|
argc=1;
|
|
args[0]=args[1]=1;
|
|
CM();
|
|
}
|
|
|
|
/* Exit attribute mode (reset fore/back-ground colors to defaults) */
|
|
void
|
|
ME(void)
|
|
{
|
|
fg_c=7;
|
|
bg_c=0;
|
|
end_term();
|
|
}
|
|
|
|
/* Clear internal state of the terminal emulation code */
|
|
void
|
|
end_term(void)
|
|
{
|
|
esc=0;
|
|
argc=-1;
|
|
fg=bg=br=0;
|
|
args[0]=args[1]=0;
|
|
dig=0;
|
|
}
|
|
|
|
/* Gracefully exit ESC-sequence processing in case of misunderstanding */
|
|
void
|
|
bail_out(int c)
|
|
{
|
|
char buf[6],*ch;
|
|
|
|
if(esc) vidc_rawputchar('\033');
|
|
if(br) vidc_rawputchar('[');
|
|
if(argc>-1) {
|
|
sprintf(buf,"%d",args[0]);
|
|
ch=buf;
|
|
while(*ch) vidc_rawputchar(*ch++);
|
|
|
|
if(argc>0) {
|
|
vidc_rawputchar(';');
|
|
sprintf(buf,"%d",args[1]);
|
|
ch=buf;
|
|
while(*ch) vidc_rawputchar(*ch++);
|
|
}
|
|
}
|
|
vidc_rawputchar(c);
|
|
end_term();
|
|
}
|
|
|
|
/* Emulate basic capabilities of cons25 terminal */
|
|
void
|
|
vidc_term_emu(int c)
|
|
{
|
|
|
|
if(!esc) {
|
|
if(c=='\033') {
|
|
esc=1;
|
|
} else {
|
|
vidc_rawputchar(c);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Do ESC sequences processing */
|
|
switch(c) {
|
|
case '\033':
|
|
/* ESC in ESC sequence - error */
|
|
bail_out(c);
|
|
break;
|
|
case '[':
|
|
/* Check if it's first char after ESC */
|
|
if(argc<0) {
|
|
br=1;
|
|
} else {
|
|
bail_out(c);
|
|
}
|
|
break;
|
|
case 'H':
|
|
/* Emulate \E[H (cursor home) and
|
|
* \E%d;%dH (cursor absolute move) */
|
|
if(br) {
|
|
switch(argc) {
|
|
case -1:
|
|
HO();
|
|
break;
|
|
case 1:
|
|
if(fg) args[0]+=pow10(dig)*3;
|
|
if(bg) args[0]+=pow10(dig)*4;
|
|
CM();
|
|
break;
|
|
default:
|
|
bail_out(c);
|
|
}
|
|
} else bail_out(c);
|
|
break;
|
|
case 'J':
|
|
/* Emulate \EJ (clear to end of screen) */
|
|
if(br && argc<0) {
|
|
CD();
|
|
} else bail_out(c);
|
|
break;
|
|
case ';':
|
|
/* perhaps args separator */
|
|
if(br && (argc>-1)) {
|
|
argc++;
|
|
} else bail_out(c);
|
|
break;
|
|
case 'm':
|
|
/* Change char attributes */
|
|
if(br) {
|
|
switch(argc) {
|
|
case -1:
|
|
ME();
|
|
break;
|
|
case 0:
|
|
if(fg) AF();
|
|
else AB();
|
|
break;
|
|
default:
|
|
bail_out(c);
|
|
}
|
|
} else bail_out(c);
|
|
break;
|
|
default:
|
|
if(isdigit(c)) {
|
|
/* Carefully collect numeric arguments */
|
|
/* XXX this is ugly. */
|
|
if(br) {
|
|
if(argc==-1) {
|
|
argc=0;
|
|
args[argc]=0;
|
|
dig=0;
|
|
/* in case we're in error... */
|
|
if(c=='3') {
|
|
fg=1;
|
|
return;
|
|
}
|
|
if(c=='4') {
|
|
bg=1;
|
|
return;
|
|
}
|
|
args[argc]=(int)(c-'0');
|
|
dig=1;
|
|
args[argc+1]=0;
|
|
} else {
|
|
args[argc]=args[argc]*10+(int)(c-'0');
|
|
if(argc==0) dig++;
|
|
}
|
|
} else bail_out(c);
|
|
} else bail_out(c);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
vidc_putchar(int c)
|
|
{
|
|
#ifdef TERM_EMU
|
|
vidc_term_emu(c);
|
|
#else
|
|
vidc_rawputchar(c);
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
vidc_getchar(void)
|
|
{
|
|
if (vidc_ischar()) {
|
|
v86.ctl = 0;
|
|
v86.addr = 0x16;
|
|
v86.eax = 0x0;
|
|
v86int();
|
|
return(v86.eax & 0xff);
|
|
} else {
|
|
return(-1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
vidc_ischar(void)
|
|
{
|
|
v86.ctl = V86_FLAGS;
|
|
v86.addr = 0x16;
|
|
v86.eax = 0x100;
|
|
v86int();
|
|
return(!(v86.efl & PSL_Z));
|
|
}
|
|
|
|
#if KEYBOARD_PROBE
|
|
|
|
#define PROBE_MAXRETRY 5
|
|
#define PROBE_MAXWAIT 400
|
|
#define IO_DUMMY 0x84
|
|
#define IO_KBD 0x060 /* 8042 Keyboard */
|
|
|
|
/* selected defines from kbdio.h */
|
|
#define KBD_STATUS_PORT 4 /* status port, read */
|
|
#define KBD_DATA_PORT 0 /* data port, read/write
|
|
* also used as keyboard command
|
|
* and mouse command port
|
|
*/
|
|
#define KBDC_ECHO 0x00ee
|
|
#define KBDS_ANY_BUFFER_FULL 0x0001
|
|
#define KBDS_INPUT_BUFFER_FULL 0x0002
|
|
#define KBD_ECHO 0x00ee
|
|
|
|
/* 7 microsec delay necessary for some keyboard controllers */
|
|
static void
|
|
delay7(void)
|
|
{
|
|
/*
|
|
* I know this is broken, but no timer is available yet at this stage...
|
|
* See also comments in `delay1ms()'.
|
|
*/
|
|
inb(IO_DUMMY); inb(IO_DUMMY);
|
|
inb(IO_DUMMY); inb(IO_DUMMY);
|
|
inb(IO_DUMMY); inb(IO_DUMMY);
|
|
}
|
|
|
|
/*
|
|
* This routine uses an inb to an unused port, the time to execute that
|
|
* inb is approximately 1.25uS. This value is pretty constant across
|
|
* all CPU's and all buses, with the exception of some PCI implentations
|
|
* that do not forward this I/O adress to the ISA bus as they know it
|
|
* is not a valid ISA bus address, those machines execute this inb in
|
|
* 60 nS :-(.
|
|
*
|
|
*/
|
|
static void
|
|
delay1ms(void)
|
|
{
|
|
int i = 800;
|
|
while (--i >= 0)
|
|
(void)inb(0x84);
|
|
}
|
|
|
|
/*
|
|
* We use the presence/absence of a keyboard to determine whether the internal
|
|
* console can be used for input.
|
|
*
|
|
* Perform a simple test on the keyboard; issue the ECHO command and see
|
|
* if the right answer is returned. We don't do anything as drastic as
|
|
* full keyboard reset; it will be too troublesome and take too much time.
|
|
*/
|
|
static int
|
|
probe_keyboard(void)
|
|
{
|
|
int retry = PROBE_MAXRETRY;
|
|
int wait;
|
|
int i;
|
|
|
|
while (--retry >= 0) {
|
|
/* flush any noise */
|
|
while (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL) {
|
|
delay7();
|
|
inb(IO_KBD + KBD_DATA_PORT);
|
|
delay1ms();
|
|
}
|
|
|
|
/* wait until the controller can accept a command */
|
|
for (wait = PROBE_MAXWAIT; wait > 0; --wait) {
|
|
if (((i = inb(IO_KBD + KBD_STATUS_PORT))
|
|
& (KBDS_INPUT_BUFFER_FULL | KBDS_ANY_BUFFER_FULL)) == 0)
|
|
break;
|
|
if (i & KBDS_ANY_BUFFER_FULL) {
|
|
delay7();
|
|
inb(IO_KBD + KBD_DATA_PORT);
|
|
}
|
|
delay1ms();
|
|
}
|
|
if (wait <= 0)
|
|
continue;
|
|
|
|
/* send the ECHO command */
|
|
outb(IO_KBD + KBD_DATA_PORT, KBDC_ECHO);
|
|
|
|
/* wait for a response */
|
|
for (wait = PROBE_MAXWAIT; wait > 0; --wait) {
|
|
if (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL)
|
|
break;
|
|
delay1ms();
|
|
}
|
|
if (wait <= 0)
|
|
continue;
|
|
|
|
delay7();
|
|
i = inb(IO_KBD + KBD_DATA_PORT);
|
|
#ifdef PROBE_KBD_BEBUG
|
|
printf("probe_keyboard: got 0x%x.\n", i);
|
|
#endif
|
|
if (i == KBD_ECHO) {
|
|
/* got the right answer */
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
#endif /* KEYBOARD_PROBE */
|