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freebsd-nq/sys/boot/pc98/libpc98/vidconsole.c
John Baldwin 4f88092408 Consolidate duplicate definitions of V86_CY() and V86_ZR() which check for 
the carry and zero flags being set, respectively, in <btxv86.h> and use
them throughout the x86 boot code.
2011-10-25 19:45:12 +00:00

597 lines
12 KiB
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/*-
* 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.
*
* Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <bootstrap.h>
#include <btxv86.h>
#include <machine/cpufunc.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
#define MAXARGS 8
#define DEFAULT_FGCOLOR 7
#define DEFAULT_BGCOLOR 0
void end_term(void);
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 CD(void);
void CM(void);
void HO(void);
static int args[MAXARGS], argc;
static int fg_c, bg_c, curx, cury;
static int esc;
#endif
static unsigned short *crtat, *Crtat;
static int row = 25, col = 80;
#ifdef TERM_EMU
static u_int8_t ibmpc_to_pc98[256] = {
0x01, 0x21, 0x81, 0xa1, 0x41, 0x61, 0xc1, 0xe1,
0x09, 0x29, 0x89, 0xa9, 0x49, 0x69, 0xc9, 0xe9,
0x25, 0x25, 0x25, 0x25, 0x25, 0x25, 0x25, 0x25,
0x25, 0x25, 0x25, 0x25, 0x25, 0x25, 0x25, 0x25,
0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85,
0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85,
0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
0x45, 0x45, 0x45, 0x45, 0x45, 0x45, 0x45, 0x45,
0x45, 0x45, 0x45, 0x45, 0x45, 0x45, 0x45, 0x45,
0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65,
0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65,
0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5,
0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5,
0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5,
0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5,
0x03, 0x23, 0x83, 0xa3, 0x43, 0x63, 0xc3, 0xe3,
0x0b, 0x2b, 0x8b, 0xab, 0x4b, 0x6b, 0xcb, 0xeb,
0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f,
0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f,
0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f,
0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f,
0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f,
0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f,
0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f, 0x6f,
0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf,
0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf,
0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef,
0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef, 0xef,
};
#define at2pc98(fg_at, bg_at) ibmpc_to_pc98[((bg_at) << 4) | (fg_at)]
#endif /* TERM_EMU */
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, hw_cursor;
if (vidc_started && arg == 0)
return (0);
vidc_started = 1;
Crtat = (unsigned short *)PTOV(0xA0000);
while ((inb(0x60) & 0x04) == 0)
;
outb(0x62, 0xe0);
while ((inb(0x60) & 0x01) == 0)
;
hw_cursor = inb(0x62);
hw_cursor |= (inb(0x62) << 8);
inb(0x62);
inb(0x62);
inb(0x62);
crtat = Crtat + hw_cursor;
#ifdef TERM_EMU
/* Init terminal emulator */
end_term();
get_pos();
curs_move(curx, cury);
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
#endif
for (i = 0; i < 10 && vidc_ischar(); i++)
(void)vidc_getchar();
return (0); /* XXX reinit? */
}
static void
beep(void)
{
outb(0x37, 6);
delay(40000);
outb(0x37, 7);
}
#if 0
static void
vidc_biosputchar(int c)
{
unsigned short *cp;
int i, pos;
#ifdef TERM_EMU
*crtat = (c == 0x5c ? 0xfc : c);
*(crtat + 0x1000) = at2pc98(fg, bg);
#else
switch(c) {
case '\b':
crtat--;
break;
case '\r':
crtat -= (crtat - Crtat) % col;
break;
case '\n':
crtat += col;
break;
default:
*crtat = (c == 0x5c ? 0xfc : c);
*(crtat++ + 0x1000) = 0xe1;
break;
}
if (crtat >= Crtat + col * row) {
cp = Crtat;
for (i = 1; i < row; i++) {
bcopy((void *)(cp + col), (void *)cp, col * 2);
cp += col;
}
for (i = 0; i < col; i++) {
*cp++ = ' ';
}
crtat -= col;
}
pos = crtat - Crtat;
while ((inb(0x60) & 0x04) == 0) {}
outb(0x62, 0x49);
outb(0x60, pos & 0xff);
outb(0x60, pos >> 8);
#endif
}
#endif
static void
vidc_rawputchar(int c)
{
int i;
if (c == '\t')
/* lame tab expansion */
for (i = 0; i < 8; i++)
vidc_rawputchar(' ');
else {
/* Emulate AH=0eh (teletype output) */
switch(c) {
case '\a':
beep();
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);
}
}
#ifdef TERM_EMU
/* Get cursor position on the screen. Result is in edx. Sets
* curx and cury appropriately.
*/
void
get_pos(void)
{
int pos = crtat - Crtat;
curx = pos % col;
cury = pos / col;
}
/* Move cursor to x rows and y cols (0-based). */
void
curs_move(int x, int y)
{
int pos;
pos = x + y * col;
crtat = Crtat + pos;
pos = crtat - Crtat;
while((inb(0x60) & 0x04) == 0) {}
outb(0x62, 0x49);
outb(0x60, pos & 0xff);
outb(0x60, pos >> 8);
curx = x;
cury = y;
#define isvisible(c) (((c) >= 32) && ((c) < 255))
if (!isvisible(*crtat & 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 fgcol, int bgcol)
{
unsigned short *cp;
int i;
if (rows == 0)
rows = 25;
cp = Crtat;
for (i = rows; i < row; i++) {
bcopy((void *)(cp + col), (void *)cp, col * 2);
cp += col;
}
for (i = 0; i < col; i++) {
*(cp + 0x1000) = at2pc98(fgcol, bgcol);
*cp++ = ' ';
}
}
/* Write character and attribute at cursor position. */
void
write_char(int c, int fgcol, int bgcol)
{
*crtat = (c == 0x5c ? 0xfc : (c & 0xff));
*(crtat + 0x1000) = at2pc98(fgcol, bgcol);
}
/**************************************************************/
/*
* Screen manipulation functions. They use accumulated data in
* args[] and argc variables.
*
*/
/* Clear display from current position to end of screen */
void
CD(void)
{
int pos;
get_pos();
for (pos = 0; crtat + pos <= Crtat + col * row; pos++) {
*(crtat + pos) = ' ';
*(crtat + pos + 0x1000) = at2pc98(fg_c, bg_c);
}
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();
}
/* Clear internal state of the terminal emulation code */
void
end_term(void)
{
esc = 0;
argc = -1;
}
/* Gracefully exit ESC-sequence processing in case of misunderstanding */
void
bail_out(int c)
{
char buf[16], *ch;
int i;
if (esc) {
vidc_rawputchar('\033');
if (esc != '\033')
vidc_rawputchar(esc);
for (i = 0; i <= argc; ++i) {
sprintf(buf, "%d", args[i]);
ch = buf;
while (*ch)
vidc_rawputchar(*ch++);
}
}
vidc_rawputchar(c);
end_term();
}
static void
get_arg(int c)
{
if (argc < 0)
argc = 0;
args[argc] *= 10;
args[argc] += c - '0';
}
/* Emulate basic capabilities of cons25 terminal */
void
vidc_term_emu(int c)
{
static int ansi_col[] = {
0, 4, 2, 6, 1, 5, 3, 7,
};
int t;
int i;
switch (esc) {
case 0:
switch (c) {
case '\033':
esc = c;
break;
default:
vidc_rawputchar(c);
break;
}
break;
case '\033':
switch (c) {
case '[':
esc = c;
args[0] = 0;
argc = -1;
break;
default:
bail_out(c);
break;
}
break;
case '[':
switch (c) {
case ';':
if (argc < 0) /* XXX */
argc = 0;
else if (argc + 1 >= MAXARGS)
bail_out(c);
else
args[++argc] = 0;
break;
case 'H':
if (argc < 0)
HO();
else if (argc == 1)
CM();
else
bail_out(c);
break;
case 'J':
if (argc < 0)
CD();
else
bail_out(c);
break;
case 'm':
if (argc < 0) {
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
}
for (i = 0; i <= argc; ++i) {
switch (args[i]) {
case 0: /* back to normal */
fg_c = DEFAULT_FGCOLOR;
bg_c = DEFAULT_BGCOLOR;
break;
case 1: /* bold */
fg_c |= 0x8;
break;
case 4: /* underline */
case 5: /* blink */
bg_c |= 0x8;
break;
case 7: /* reverse */
t = fg_c;
fg_c = bg_c;
bg_c = t;
break;
case 30: case 31: case 32: case 33:
case 34: case 35: case 36: case 37:
fg_c = ansi_col[args[i] - 30];
break;
case 39: /* normal */
fg_c = DEFAULT_FGCOLOR;
break;
case 40: case 41: case 42: case 43:
case 44: case 45: case 46: case 47:
bg_c = ansi_col[args[i] - 40];
break;
case 49: /* normal */
bg_c = DEFAULT_BGCOLOR;
break;
}
}
end_term();
break;
default:
if (isdigit(c))
get_arg(c);
else
bail_out(c);
break;
}
break;
default:
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 = 0x18;
v86.eax = 0x0;
v86int();
return (v86.eax & 0xff);
} else {
return (-1);
}
}
static int
vidc_ischar(void)
{
v86.ctl = 0;
v86.addr = 0x18;
v86.eax = 0x100;
v86int();
return ((v86.ebx >> 8) & 0x1);
}
#if KEYBOARD_PROBE
static int
probe_keyboard(void)
{
return (*(u_char *)PTOV(0xA1481) & 0x48);
}
#endif /* KEYBOARD_PROBE */
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