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/*-
* Copyright (c) 2009 TAKAHASHI Yoshihiro <nyan@FreeBSD.org>
* 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/pc98/libpc98/pc98_sys.c 201339 2009-12-31 12:05:48Z nyan $");
#include <btxv86.h>
#include <machine/cpufunc.h>
#define _KERNEL
#include <pc98/pc98/pc98_machdep.h>
/*
* Set machine type to PC98_SYSTEM_PARAMETER.
*/
void
set_machine_type(void)
{
int i;
u_long ret, data;
/* PC98_SYSTEM_PARAMETER (0x501) */
ret = ((*(u_char *)PTOV(0xA1501)) & 0x08) >> 3;
/* Wait V-SYNC */
while (inb(0x60) & 0x20) {}
while (!(inb(0x60) & 0x20)) {}
/* ANK 'A' font */
outb(0xa1, 0x00);
outb(0xa3, 0x41);
/* M_NORMAL, use CG window (all NEC OK) */
for (i = data = 0; i < 4; i++)
data += *((u_long *)PTOV(0xA4000) + i); /* 0xa4000 */
if (data == 0x6efc58fc) /* DA data */
ret |= M_NEC_PC98;
else
ret |= M_EPSON_PC98;
ret |= (inb(0x42) & 0x20) ? M_8M : 0;
/* PC98_SYSTEM_PARAMETER(0x400) */
if ((*(u_char *)PTOV(0xA1400)) & 0x80)
ret |= M_NOTE;
if (ret & M_NEC_PC98) {
/* PC98_SYSTEM_PARAMETER(0x458) */
if ((*(u_char *)PTOV(0xA1458)) & 0x80)
ret |= M_H98;
else
ret |= M_NOT_H98;
} else
ret |= M_NOT_H98;
(*(u_long *)PTOV(0xA1620)) = ret;
}