diff options
Diffstat (limited to 'sys/arch/i386/stand/libsa/bioskbd.S')
| -rw-r--r-- | sys/arch/i386/stand/libsa/bioskbd.S | 196 |
1 files changed, 52 insertions, 144 deletions
diff --git a/sys/arch/i386/stand/libsa/bioskbd.S b/sys/arch/i386/stand/libsa/bioskbd.S index 2b70ea39eb9..4a3dda4746b 100644 --- a/sys/arch/i386/stand/libsa/bioskbd.S +++ b/sys/arch/i386/stand/libsa/bioskbd.S @@ -1,58 +1,42 @@ -/* $OpenBSD: bioskbd.S,v 1.4 1997/04/09 08:39:23 mickey Exp $ */ +/* $OpenBSD: bioskbd.S,v 1.5 1997/04/21 19:47:32 mickey Exp $ */ /* - * Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 + * Copyright (c) 1997 Michael Shalayeff + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Michael Shalayeff. + * 4. 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 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. * - * Mach Operating System - * Copyright (c) 1992, 1991 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. */ -/* - Copyright 1988, 1989, 1990, 1991, 1992 - by Intel Corporation, Santa Clara, California. - - All Rights Reserved - -Permission to use, copy, modify, and distribute this software and -its documentation for any purpose and without fee is hereby -granted, provided that the above copyright notice appears in all -copies and that both the copyright notice and this permission notice -appear in supporting documentation, and that the name of Intel -not be used in advertising or publicity pertaining to distribution -of the software without specific, written prior permission. - -INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE -INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, -IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR -CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM -LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, -NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION -WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -*/ - #include <machine/asm.h> #define _LOCORE +#include <dev/isa/isareg.h> +#include <dev/ic/mc146818reg.h> +#include <i386/isa/nvram.h> #include "biosdev.h" #undef _LOCORE @@ -62,85 +46,21 @@ WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ ENTRY(kbd_probe) -#if 0 -#include <machine/console.h> -#include <machine/cpufunc.h> -#include "boot.h" - -int -probe_keyboard(void) -{ - int i, retries = 5; - unsigned char val; - - /* flush any noise in the buffer */ - while (inb(KB_STAT) & KB_BUF_FULL) { - delay1ms(); - (void) inb(KB_DATA); - } - - /* Try to reset keyboard hardware */ - again: - while (--retries) { -#ifdef DEBUG - printf("%d ", retries); -#endif - while ((inb(KB_STAT) & KB_READY) == KB_READY) delay1ms(); - outb(KB_DATA, KB_RESET); - for (i=0; i<1000; i++) { - delay1ms(); - val = inb(KB_DATA); - if (val == KB_ACK || val == KB_ECHO) - goto gotack; - if (val == KB_RESEND) - break; - } - } -gotres: -#ifdef DEBUG - printf("gotres\n"); -#endif - if (!retries) { -#ifdef DEBUG - printf("gave up\n"); -#endif - return(1); - } -gotack: - delay1ms(); - while ((inb(KB_STAT) & KB_BUF_FULL) == 0) delay1ms(); - delay1ms(); -#ifdef DEBUG - printf("ACK "); -#endif - val = inb(KB_DATA); - if (val == KB_ACK) - goto gotack; - if (val == KB_RESEND) - goto again; - if (val != KB_RESET_DONE) { -#ifdef DEBUG - printf("stray val %d\n", val); -#endif - return(0); - } -#ifdef DEBUG - printf("ok\n"); -#endif - return(0); -} - -#endif - movl 1, %eax /* present (: */ + movb $NVRAM_EQUIPMENT, %al + outb %al, $IO_RTC + inb $(IO_RTC+1), %al + xorl %edx, %edx + andb $(NVRAM_EQUIPMENT_KBD|NVRAM_EQUIPMENT_DISPLAY), %al + cmpb $(NVRAM_EQUIPMENT_KBD|NVRAM_EQUIPMENT_DISPLAY), %al + je 1f + incl %edx +1: movl %edx, %eax ret /* -# BIOS call "INT 10H Function 0Eh" to write character to console -# Call with %ah = 0x0e -# %al = character -# %bh = page -# %bl = foreground color -*/ + * void kbd_putc(int c) + * output byte to console + */ ENTRY(kbd_putc) pushl %ebx @@ -149,37 +69,25 @@ ENTRY(kbd_putc) xorl %ebx, %ebx incl %ebx BIOSINT(0x10) # display a byte - popl %ebx ret - /* -# BIOS call "INT 16H Function 00H" to read character from the keyboard -# Call with %ah = 0x00 -# Return: %ah = keyboard scan code -# %al = ASCII character -*/ + * int kbd_getc(void) + * read character from keyboard + */ ENTRY(kbd_getc) - xorl %eax, %eax + movb $0, %ah BIOSINT(0x16) movzbl %al, %eax ret - /* -# BIOS call "INT 16H Function 01H" to check whether a character is pending -# Call with %ah = 0x01 -# Return: -# If key waiting to be input: -# %ah = keyboard scan code -# %al = ASCII character -# ZF = clear -# else -# ZF = set -*/ + * int kbd_ischar(void) + * check if there is character available from keyboard + */ ENTRY(kbd_ischar) - movb $0x01, %ah + movb $1, %ah BIOSINT(0x16) setnz %al movzbl %al, %eax |