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-rw-r--r--stand/i386/libi386/vidconsole.c632
1 files changed, 632 insertions, 0 deletions
diff --git a/stand/i386/libi386/vidconsole.c b/stand/i386/libi386/vidconsole.c
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+++ b/stand/i386/libi386/vidconsole.c
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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/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
+#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(int *x, int *y);
+void curs_move(int *_x, int *_y, 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
+
+
+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 (0);
+ vidc_started = 1;
+#ifdef TERM_EMU
+ /* Init terminal emulator */
+ end_term();
+ get_pos(&curx, &cury);
+ curs_move(&curx, &cury, 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? */
+}
+
+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, curx, cury);
+ return;
+ case '\n':
+ cury++;
+ if (cury > 24) {
+ scroll_up(1, fg_c, bg_c);
+ cury--;
+ } else {
+ curs_move(&curx, &cury, curx, cury);
+ }
+ return;
+ case '\b':
+ if (curx > 0) {
+ curx--;
+ curs_move(&curx, &cury, 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, curx, cury);
+#endif
+ }
+}
+
+#ifdef TERM_EMU
+
+/* Get cursor position on the screen. Result is in edx. Sets
+ * curx and cury appropriately.
+ */
+void
+get_pos(int *x, int *y)
+{
+
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0300;
+ v86.ebx = 0x0;
+ v86int();
+ *x = v86.edx & 0x00ff;
+ *y = (v86.edx & 0xff00) >> 8;
+}
+
+/* Move cursor to x rows and y cols (0-based). */
+void
+curs_move(int *_x, int *_y, int x, int y)
+{
+
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0200;
+ v86.ebx = 0x0;
+ v86.edx = ((0x00ff & y) << 8) + (0x00ff & x);
+ v86int();
+ *_x = x;
+ *_y = 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 fgcol, int bgcol)
+{
+
+ if (rows == 0)
+ rows = 25;
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0600 + (0x00ff & rows);
+ v86.ebx = (bgcol << 12) + (fgcol << 8);
+ v86.ecx = 0x0;
+ v86.edx = 0x184f;
+ v86int();
+}
+
+/* Write character and attribute at cursor position. */
+void
+write_char(int c, int fgcol, int bgcol)
+{
+
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0900 + (0x00ff & c);
+ v86.ebx = (bgcol << 4) + fgcol;
+ v86.ecx = 0x1;
+ v86int();
+}
+
+/**************************************************************/
+/*
+ * Screen manipulation functions. They use accumulated data in
+ * args[] and argc variables.
+ *
+ */
+
+/* Clear display from current position to end of screen */
+void
+CD(void)
+{
+
+ get_pos(&curx, &cury);
+ if (curx > 0) {
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0600;
+ v86.ebx = (bg_c << 4) + fg_c;
+ v86.ecx = (cury << 8) + curx;
+ v86.edx = (cury << 8) + 79;
+ v86int();
+ if (++cury > 24) {
+ end_term();
+ return;
+ }
+ }
+ v86.ctl = 0;
+ v86.addr = 0x10;
+ v86.eax = 0x0600;
+ v86.ebx = (bg_c << 4) + fg_c;
+ v86.ecx = (cury << 8) + 0;
+ v86.edx = (24 << 8) + 79;
+ v86int();
+ 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(&curx, &cury, 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 = 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_ZR(v86.efl));
+}
+
+#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 address 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 (1);
+ }
+ }
+
+ return (0);
+}
+#endif /* KEYBOARD_PROBE */
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