948486abe3
- Discard large amounts of BIOS-related code in favour of the more compact BTX vm86 interface. - Build the loader module as ELF, although the resulting object is a.out, make gensetdefs 32/64-bit sensitive and use a single copy of it. - Throw away installboot, as it's no longer required. - Use direct bcopy operations in the i386_copy module, as BTX maps the first 16M of memory. Check operations against the detected size of actual memory.
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* Copyright (c) 1998 Michael Smith (msmith@freebsd.org)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp
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*
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* $Id: comconsole.c,v 1.1.1.1 1998/08/21 03:17:41 msmith Exp $
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*/
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#include <stand.h>
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#include <bootstrap.h>
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#include <btxv86.h>
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#include "libi386.h"
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static void comc_probe(struct console *cp);
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static int comc_init(int arg);
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static void comc_putchar(int c);
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static int comc_getchar(void);
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static int comc_ischar(void);
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struct console comconsole = {
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"comconsole",
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"BIOS serial port",
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0,
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comc_probe,
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comc_init,
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comc_putchar,
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comc_getchar,
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comc_ischar
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};
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#define BIOS_COMPORT 0
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static void
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comc_probe(struct console *cp)
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{
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/* XXX check the BIOS equipment list? */
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cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
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}
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static int
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comc_init(int arg)
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{
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v86.ctl = V86_FLAGS;
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v86.addr = 0x14;
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v86.eax = 0xe3; /* 9600N81 */
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v86.edx = BIOS_COMPORT; /* XXX take as arg, or use env var? */
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v86int();
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return(v86.efl & 1);
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}
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static void
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comc_putchar(int c)
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{
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v86.ctl = 0;
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v86.addr = 0x14;
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v86.eax = 0x100 | c;
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v86int();
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}
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static int
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comc_getchar(void)
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{
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if (comc_ischar()) {
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v86.ctl = 0;
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v86.addr = 0x14;
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v86.eax = 0x300;
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v86int();
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return(v86.eax);
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} else {
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return(-1);
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}
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}
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static int
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comc_ischar(void)
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{
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v86.ctl = 0;
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v86.addr = 0x14;
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v86.eax = 0x200;
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v86int();
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return(v86.eax & 0x1);
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}
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