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Diffstat (limited to 'sys/arch/i386/netboot/kbd.c')
-rw-r--r--sys/arch/i386/netboot/kbd.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/sys/arch/i386/netboot/kbd.c b/sys/arch/i386/netboot/kbd.c
new file mode 100644
index 00000000000..6b6f33e1662
--- /dev/null
+++ b/sys/arch/i386/netboot/kbd.c
@@ -0,0 +1,363 @@
+/* $NetBSD: kbd.c,v 1.3 1994/10/27 04:21:15 cgd Exp $ */
+
+/* netboot
+ *
+ * source in this file came from
+ * the original 386BSD boot blocks.
+ *
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ * @(#)kbd.c 7.4 (Berkeley) 5/4/91
+ */
+
+#include "proto.h"
+
+#define KBSTATP 0x64 /* kbd status port */
+#define KBS_INP_BUF_FUL 0x02 /* kbd char ready */
+#define KBDATAP 0x60 /* kbd data port */
+
+#define K_RDWR 0x60 /* keyboard data & cmds (read/write) */
+#define K_STATUS 0x64 /* keyboard status */
+#define K_CMD 0x64 /* keybd ctlr command (write-only) */
+
+#define K_OBUF_FUL 0x01 /* output buffer full */
+#define K_IBUF_FUL 0x02 /* input buffer full */
+
+#define KC_CMD_WIN 0xd0 /* read output port */
+#define KC_CMD_WOUT 0xd1 /* write output port */
+#define KB_A20 0x9f /* enable A20,
+ enable output buffer full interrupt
+ enable data line
+ disable clock line */
+
+#define L 0x01 /* locking function */
+#define SHF 0x02 /* keyboard shift */
+#define ALT 0x04 /* alternate shift -- alternate chars */
+#define NUM 0x08 /* numeric shift cursors vs. numeric */
+#define CTL 0x10 /* control shift -- allows ctl function */
+#define CPS 0x20 /* caps shift -- swaps case of letter */
+#define ASCII 0x40 /* ascii code for this key */
+#define STP 0x80 /* stop output */
+
+static u_char action[128] = {
+0, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 0- 7 */
+ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 8-15 */
+ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 16-23 */
+ASCII, ASCII, ASCII, ASCII, ASCII, CTL, ASCII, ASCII, /* scan 24-31 */
+ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 32-39 */
+ASCII, ASCII, SHF , ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 40-47 */
+ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, SHF, ASCII, /* scan 48-55 */
+ ALT, ASCII, CPS|L, 0, 0, ASCII, 0, 0, /* scan 56-63 */
+ 0, 0, 0, 0, 0, NUM|L, STP|L, ASCII, /* scan 64-71 */
+ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 72-79 */
+ASCII, ASCII, ASCII, ASCII, 0, 0, 0, 0, /* scan 80-87 */
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
+
+static u_char unshift[128] = { /* no shift */
+0, 033 , '1' , '2' , '3' , '4' , '5' , '6' , /* scan 0- 7 */
+'7' , '8' , '9' , '0' , '-' , '=' , 0177 ,'\t' , /* scan 8-15 */
+
+'q' , 'w' , 'e' , 'r' , 't' , 'y' , 'u' , 'i' , /* scan 16-23 */
+'o' , 'p' , '[' , ']' , '\r' , CTL , 'a' , 's' , /* scan 24-31 */
+
+'d' , 'f' , 'g' , 'h' , 'j' , 'k' , 'l' , ';' , /* scan 32-39 */
+'\'' , '`' , SHF , '\\' , 'z' , 'x' , 'c' , 'v' , /* scan 40-47 */
+
+'b' , 'n' , 'm' , ',' , '.' , '/' , SHF , '*', /* scan 48-55 */
+ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
+
+ 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */
+ '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */
+
+ '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
+
+static u_char shift[128] = { /* shift shift */
+0, 033 , '!' , '@' , '#' , '$' , '%' , '^' , /* scan 0- 7 */
+'&' , '*' , '(' , ')' , '_' , '+' , 0177 ,'\t' , /* scan 8-15 */
+'Q' , 'W' , 'E' , 'R' , 'T' , 'Y' , 'U' , 'I' , /* scan 16-23 */
+'O' , 'P' , '[' , ']' , '\r' , CTL , 'A' , 'S' , /* scan 24-31 */
+'D' , 'F' , 'G' , 'H' , 'J' , 'K' , 'L' , ':' , /* scan 32-39 */
+'"' , '~' , SHF , '|' , 'Z' , 'X' , 'C' , 'V' , /* scan 40-47 */
+'B' , 'N' , 'M' , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */
+ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
+ 0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */
+ '8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */
+ '2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
+
+static u_char ctl[128] = { /* CTL shift */
+0, 033 , '!' , 000 , '#' , '$' , '%' , 036 , /* scan 0- 7 */
+'&' , '*' , '(' , ')' , 037 , '+' , 034 ,'\177', /* scan 8-15 */
+021 , 027 , 005 , 022 , 024 , 031 , 025 , 011 , /* scan 16-23 */
+017 , 020 , 033 , 035 , '\r' , CTL , 001 , 013 , /* scan 24-31 */
+004 , 006 , 007 , 010 , 012 , 013 , 014 , ';' , /* scan 32-39 */
+'\'' , '`' , SHF , 034 , 032 , 030 , 003 , 026 , /* scan 40-47 */
+002 , 016 , 015 , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */
+ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
+CPS|L, 0, 0, 0, 0, 0, 0, 0, /* scan 64-71 */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* scan 72-79 */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* scan 80-87 */
+ 0, 0, 033, '7' , '4' , '1' , 0, NUM|L, /* scan 88-95 */
+'8' , '5' , '2' , 0, STP|L, '9' , '6' , '3' , /*scan 96-103*/
+'.' , 0, '*' , '-' , '+' , 0, 0, 0, /*scan 104-111*/
+0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
+
+static u_char shfts, ctls, alts, caps, num, stp;
+static u_char chr;
+static int is_chr_queued = 0;
+
+static int
+ProcessKbdEvent(void) {
+ /* Returns 1 if event result is an ascii char, 0 otherwise (or no event).
+ * As a side effect, it digests keyboard events and queues bona fide
+ * characters for subsequent reading.
+ */
+ u_char dt, brk, act;
+ if ((inb(KBSTATP) & 0x01) == 0)
+ return is_chr_queued;
+ dt = inb(KBDATAP);
+ brk = dt & 0x80;
+ dt = dt & 0x7f;
+
+ act = action[dt];
+ if (act & SHF) {
+ if (brk)
+ shfts = 0;
+ else
+ shfts = 1;
+ }
+ if (act & ALT) {
+ if (brk)
+ alts = 0;
+ else
+ alts = 1;
+ }
+ if (act & NUM) {
+ if (act & L) {
+ if (!brk)
+ num ^= 1;
+ } else
+ if(brk)
+ num = 0;
+ else
+ num = 1;
+ }
+ if (act & CTL) {
+ if (brk)
+ ctls = 0;
+ else
+ ctls = 1;
+ }
+ if (act & CPS) {
+ if (act & L) {
+ if (!brk)
+ caps ^= 1;
+ } else
+ if (brk)
+ caps = 0;
+ else
+ caps = 1;
+ }
+ if (act & STP) {
+ if (act & L) {
+ if (!brk)
+ stp ^= 1;
+ } else
+ if (brk)
+ stp = 0;
+ else
+ stp = 1;
+ }
+ if (ctls && alts && dt == 83)
+ exit(1);
+ if ((act & ASCII) && !brk) {
+ if (shfts) {
+ chr = shift[dt];
+ } else {
+ if (ctls) {
+ chr = ctl[dt];
+ } else {
+ chr = unshift[dt];
+ }
+ }
+ if (caps && (chr >= 'a' && chr <= 'z')) {
+ chr -= 'a' - 'A' ;
+ }
+ is_chr_queued = 1;
+ }
+ return is_chr_queued;
+}
+
+int
+IsKbdCharReady(void) {
+#ifdef USE_BIOS
+ int result;
+ asm("
+ push %%ebx
+ call _prot_to_real
+ mov $1, %%ax
+ int $0x16
+ setz %%bl
+ .byte 0x66
+ call _real_to_prot
+ movsbl %%bl, %0
+ pop %%ebx
+ " : "=g" (result));
+ return result;
+#else
+ return ProcessKbdEvent();
+#endif
+}
+
+static int
+scankbd(void) {
+
+#ifdef notdef
+ u_char c;
+ c = inb(KBDATAP);
+ if (c == 83) exit();
+ /*if (c == 0xaa) return (0);
+ if (c == 0xfa) return (0);*/
+
+ if (bdt == 0) { bdt = c&0x7f; return(0); }
+
+ if(odt) return(1);
+
+ c &= 0x7f;
+
+ if (bdt == c) return(0);
+ odt = c;
+#endif
+ return 1;
+}
+
+static void
+kbdreset(void) {
+ u_char c;
+
+ /* Enable interrupts and keyboard controller */
+ while (inb(KBSTATP)&2); outb(KBSTATP,0x60);
+ while (inb(KBSTATP)&2); outb(KBDATAP,0x4D);
+
+ /* Start keyboard stuff RESET */
+ while (inb(KBSTATP)&2); /* wait input ready */
+ outb(KBDATAP,0xFF); /* RESET */
+
+ while((c=inb(KBDATAP))!=0xFA) ;
+
+ /* While we are here, defeat gatea20 */
+ while (inb(KBSTATP)&2); /* wait input ready */
+ outb(KBSTATP,0xd1);
+ while (inb(KBSTATP)&2); /* wait input ready */
+ outb(KBDATAP,0xdf);
+ while (inb(KBSTATP)&2); /* wait input ready */
+ inb(KBDATAP);
+}
+
+/* TBD - what does this do?, used by ResetCpu() */
+void
+KbdWait(int n) {
+ int v;
+
+ v = 0;
+ while(n-- && (v = scankbd()) == 0);
+ if (v) kbdreset();
+}
+
+/*
+ * Gate A20 for high memory
+ */
+u_char x_20 = KB_A20;
+
+void
+gateA20(void) {
+ while (inb(K_STATUS) & K_IBUF_FUL);
+ while (inb(K_STATUS) & K_OBUF_FUL)
+ (void)inb(K_RDWR);
+
+ outb(K_CMD, KC_CMD_WOUT);
+ while (inb(K_STATUS) & K_IBUF_FUL);
+ outb(K_RDWR, x_20);
+ while (inb(K_STATUS) & K_IBUF_FUL);
+}
+
+int
+getc(void) {
+#ifdef USE_BIOS
+ int rslt;
+ asm("
+ push %%ebx
+ call _prot_to_real
+ movb $0x0, %%ah
+ sti
+ int $0x16
+ cli
+ movb %%al, %%bl
+ .byte 0x66
+ call _real_to_prot
+ xor %%eax, %%eax
+ movb %%bl, %0
+ pop %%ebx
+ " : "=g" (rslt));
+ return rslt;
+#else
+ while (!is_chr_queued) {
+ ProcessKbdEvent();
+ }
+ is_chr_queued = 0;
+ return chr;
+#endif
+}
+
+int
+getchar(void) {
+ int c;
+
+ if ((c=getc()) == '\r')
+ c = '\n';
+ if (c == '\b') {
+ putchar('\b');
+ putchar(' ');
+ }
+ putchar(c);
+ return c;
+}
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