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freebsd/usr.bin/doscmd/bios.c
Marcel Moolenaar 535b692091 Unbreak doscmd after the sigset_t change: 
doscmd heavily depends on struct sigcontext which luckily is mostly passed
between functions as usion regcontext_t. By redefining union regcontext_t in
terms of mcontext_t almost all bases are covered.

It also seems to me that doscmd was in a transitional state. The redundant
definitions made it difficult to get a clear overview and could easily cause
oversight. To make sure my changes were ok, I went as far as to complete the
transition. It was not exactly necessary, but I expect to have to come back
here some more ("whistle" if I'm wrong :-).
1999-09-29 20:09:19 +00:00

332 lines
9.1 KiB
C
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/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. 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 Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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.
*
* BSDI bios.c,v 2.3 1996/04/08 19:32:19 bostic Exp
*
* $FreeBSD$
*/
#include "doscmd.h"
#include "mouse.h"
#include "com.h"
#define BIOS_copyright 0xfe000
#define BIOS_reset 0xfe05b
#define BIOS_nmi 0xfe2c3
#define BIOS_hdisk_table 0xfe401
#define BIOS_boot 0xfe6f2
#define BIOS_comm_table 0xfe729
#define BIOS_comm_io 0xfe739
#define BIOS_keyboard_io 0xfe82e
#define BIOS_keyboard_isr 0xfe987
#define BIOS_fdisk_io 0xfec59
#define BIOS_fdisk_isr 0xfef57
#define BIOS_disk_parms 0xfefc7
#define BIOS_printer_io 0xfefd2
#define BIOS_video_io 0xff065
#define BIOS_video_parms 0xff0a4
#define BIOS_mem_size 0xff841
#define BIOS_equipment 0xff84d
#define BIOS_cassette_io 0xff859
#define BIOS_video_font 0xffa6e
#define BIOS_time_of_day 0xffe6e
#define BIOS_timer_int 0xffea5
#define BIOS_vector 0xffef3
#define BIOS_dummy_iret 0xfff53
#define BIOS_print_screen 0xfff54
#define BIOS_hard_reset 0xffff0
#define BIOS_date_stamp 0xffff5
#define BIOS_hardware_id 0xffffe
static u_char video_parms[] = {
0x38, 40, 0x2d, 10, 0x1f, 6, 0x19, 0x1c, 2, 7, 6, 7, 0, 0, 0, 0,
0x71, 80, 0x5a, 10, 0x1f, 6, 0x19, 0x1c, 2, 7, 6, 7, 0, 0, 0, 0,
0x38, 40, 0x2d, 10, 0x7f, 6, 0x64, 0x70, 2, 1, 6, 7, 0, 0, 0, 0,
0x61, 80, 0x52, 15, 0x19, 6, 0x19, 0x19, 2, 13, 11, 12, 0, 0, 0, 0,
};
static u_char disk_params[] = {
0xdf, 2, 0x25, 2, 0x0f, 0x1b, 0xff, 0x54, 0xf6, 0x0f, 8,
};
static u_short comm_table[] = {
1047, 768, 384, 192, 96, 48, 24, 12,
};
/* exports */
int nfloppies = 0;
int ndisks = 0;
int nserial = 0;
int nparallel = 0;
unsigned long rom_config;
/*
** BIOS equipment list
*/
static void
int11(regcontext_t *REGS)
{
R_AX =
(nfloppies ? 1:0) | /* do we have any floppydisks? */
(0x2 << 4) | /* 80x25 colour */
((nfloppies-1) << 6) | /* how many floppies? */
(nserial << 9) | /* serial ports? */
(nparallel << 14); /* parallel ports? */
}
/*
** get installed memory
*/
static void
int12(regcontext_t *REGS)
{
R_AX = 640;
}
/*
** assorted oddments
*/
static void
int15(regcontext_t *REGS)
{
int cond;
int count;
R_FLAGS &= ~PSL_C;
switch (R_AH) {
case 0x00: /* Get Cassette Status */
R_AH = 0x86;
R_FLAGS |= PSL_C; /* We don't support a cassette */
break;
case 0x04: /* Set ABIOS table */
R_FLAGS |= PSL_C; /* We don't support it */
break;
case 0x4f:
/*
* XXX - Check scan code in GET8L(sc->sc_eax).
*/
break;
case 0x88:
get_raw_extmemory_info(REGS);
break;
case 0xc0: /* get configuration */
debug (D_TRAPS|0x15, "Get configuration\n", R_DX);
PUTVEC(R_ES, R_BX, rom_config);
R_AH = 0;
break;
case 0xc1: /* get extended BIOS data area */
R_FLAGS |= PSL_C;
break;
case 0xc2: /* Pointing device */
R_FLAGS |= PSL_C;
R_AH = 5; /* No pointer */
break;
default:
unknown_int2(0x15, R_AX, REGS);
break;
}
}
extern void int16(regcontext_t *REGS);
extern void int17(regcontext_t *REGS);
extern void int1a(regcontext_t *REGS);
void
bios_init(void)
{
int i, j, k;
u_char *jtab;
struct timeval tv;
time_t tv_sec;
struct timezone tz;
struct tm tm;
u_long vec;
if (1 || !raw_kbd) {
strcpy((char *)BIOS_copyright,
"Copyright (C) 1993 Krystal Technologies/BSDI");
*(u_short *)BIOS_reset = 0xffcd;
*(u_short *)BIOS_nmi = 0xffcd;
*(u_short *)BIOS_boot = 0xffcd;
*(u_short *)BIOS_comm_io = 0xffcd;
*(u_short *)BIOS_keyboard_io = 0xffcd;
*(u_short *)BIOS_keyboard_isr = 0xffcd;
*(u_short *)BIOS_fdisk_io = 0xffcd;
*(u_short *)BIOS_fdisk_isr = 0xffcd;
*(u_short *)BIOS_printer_io = 0xffcd;
*(u_short *)BIOS_video_io = 0xffcd;
*(u_short *)BIOS_cassette_io = 0xffcd;
*(u_short *)BIOS_time_of_day = 0xffcd;
*(u_short *)BIOS_timer_int = 0xffcd;
*(u_short *)BIOS_dummy_iret = 0xffcd;
*(u_short *)BIOS_print_screen = 0xffcd;
*(u_short *)BIOS_hard_reset = 0xffcd;
*(u_short *)BIOS_mem_size = 0xffcd;
*(u_short *)BIOS_equipment = 0xffcd;
*(u_short *)BIOS_vector = 0xffcd;
*(u_char *)0xffff2 = 0xcf; /* IRET */
/*
*memcpy((u_char *)BIOS_video_parms, video_parms, sizeof(video_parms));
*/
memcpy((u_char *)BIOS_disk_parms, disk_params, sizeof(disk_params));
memcpy((u_char *)BIOS_comm_table, comm_table, sizeof(comm_table));
*(u_short *)BIOS_video_font = 0xffcd;
jtab = (u_char *)BIOS_date_stamp;
*jtab++ = '1';
*jtab++ = '0';
*jtab++ = '/';
*jtab++ = '3';
*jtab++ = '1';
*jtab++ = '/';
*jtab++ = '9';
*jtab++ = '3';
#if 0
*(u_char *)BIOS_hardware_id = 0xfe; /* Identify as a PC/XT */
*(u_char *)BIOS_hardware_id = 0xff; /* Identify as a PC */
#endif
*(u_char *)BIOS_hardware_id = 0xfc; /* Identify as a PC/AT */
}
/*
* Interrupt revectors F000:0000 - F000:03ff
*/
for (i = 0, j = 0, k = 0; i < 0x100; ++i) {
if ((i >= 0x60 && i < 0x68) ||
(i >= 0x78 && i < 0xe2))
continue;
if ((i >= 0x00 && i < 0x2f) ||
(i >= 0x30 && i < 0xfe)) {
ivec[i] = 0xF0300000L | (k * 1);
jtab = (u_char *)VECPTR(ivec[i]);
*jtab++ = 0xf4; /* HLT */
++k;
} else {
ivec[i] = 0xF0000000L | (j * 6);
jtab = (u_char *)VECPTR(ivec[i]);
*jtab++ = 0xcd; /* INT i */
*jtab++ = i;
*jtab++ = 0xca; /* RETF 2 */
*jtab++ = 2;
*jtab++ = 0;
++j;
}
}
/*
* Misc variables from F000:0400 - F000:0fff
*/
rom_config = 0xF0000400;
jtab = (u_char *)VECPTR(rom_config);
*jtab++ = 20; /* length of entry */
*jtab++ = 0;
*jtab++ = *(u_char *)BIOS_hardware_id;
*jtab++ = 0x00; /* Sub model */
*jtab++ = 0x01; /* Bios Rev Enhanced kbd w/3.5" floppy */
*jtab++ = 0x20; /* real time clock present */
*jtab++ = 0; /* Reserved */
*jtab++ = 0;
*jtab++ = 0;
*jtab++ = 0;
strcpy((char *)jtab, "BSDI BIOS");
*jtab += 10;
InDOS = jtab++;
*InDOS = 0;
mouse_area = jtab;
jtab += 0x10;
*(u_short *)&BIOSDATA[0x10] =
(1 << 0) | /* Diskette avail for boot */
(1 << 1) | /* Math co-processor */
(nmice << 2) | /* No pointing device */
(2 << 4) | /* Initial video (80 x 25 C) */
(nfloppies - 1 << 6) | /* Number of floppies - 1 */
(nserial << 9) | /* Number of serial devices */
(nparallel << 14); /* Number of parallel devices */
*(u_short *)&BIOSDATA[0x13] = 640; /* Amount of memory */
BIOSDATA[0x75] = ndisks; /* number of fixed disks */
BIOSDATA[0x8F] = 0;
if (nfloppies >= 1) {
BIOSDATA[0x8F] |= 0x04;
BIOSDATA[0x90] = 0x40;
}
if (nfloppies >= 2) {
BIOSDATA[0x8F] |= 0x40;
BIOSDATA[0x91] = 0x40;
}
gettimeofday(&tv, &tz);
tv_sec = tv.tv_sec;
tm = *localtime(&tv_sec);
*(u_long *)&BIOSDATA[0x6c] =
(((tm.tm_hour * 60 + tm.tm_min) * 60) + tm.tm_sec) * 182 / 10;
vec = insert_softint_trampoline();
ivec[0x11] = vec;
register_callback(vec, int11, "int 11");
vec = insert_softint_trampoline();
ivec[0x12] = vec;
register_callback(vec, int12, "int 12");
vec = insert_softint_trampoline();
ivec[0x14] = vec;
register_callback(vec, int14, "int 14");
vec = insert_softint_trampoline();
ivec[0x15] = vec;
register_callback(vec, int15, "int 15");
vec = insert_softint_trampoline();
ivec[0x16] = vec;
register_callback(vec, int16, "int 16");
vec = insert_softint_trampoline();
ivec[0x17] = vec;
register_callback(vec, int17, "int 17");
vec = insert_softint_trampoline();
ivec[0x1a] = vec;
register_callback(vec, int1a, "int 1a");
}
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