cf83985263
- Add setting machine type support to the loader. - Don't use 15M-16M area on pc98. It's reserved for some devices.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*-
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* Copyright (c) 2009 TAKAHASHI Yoshihiro <nyan@FreeBSD.org>
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* All rights reserved.
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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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <btxv86.h>
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#include <machine/cpufunc.h>
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#define _KERNEL
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#include <pc98/pc98/pc98_machdep.h>
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/*
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* Set machine type to PC98_SYSTEM_PARAMETER.
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*/
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void
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set_machine_type(void)
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{
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int i;
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u_long ret, data;
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/* PC98_SYSTEM_PARAMETER (0x501) */
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ret = ((*(u_char *)PTOV(0xA1501)) & 0x08) >> 3;
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/* Wait V-SYNC */
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while (inb(0x60) & 0x20) {}
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while (!(inb(0x60) & 0x20)) {}
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/* ANK 'A' font */
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outb(0xa1, 0x00);
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outb(0xa3, 0x41);
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/* M_NORMAL, use CG window (all NEC OK) */
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for (i = data = 0; i < 4; i++)
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data += *((u_long *)PTOV(0xA4000) + i); /* 0xa4000 */
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if (data == 0x6efc58fc) /* DA data */
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ret |= M_NEC_PC98;
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else
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ret |= M_EPSON_PC98;
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ret |= (inb(0x42) & 0x20) ? M_8M : 0;
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/* PC98_SYSTEM_PARAMETER(0x400) */
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if ((*(u_char *)PTOV(0xA1400)) & 0x80)
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ret |= M_NOTE;
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if (ret & M_NEC_PC98) {
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/* PC98_SYSTEM_PARAMETER(0x458) */
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if ((*(u_char *)PTOV(0xA1458)) & 0x80)
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ret |= M_H98;
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else
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ret |= M_NOT_H98;
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} else
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ret |= M_NOT_H98;
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(*(u_long *)PTOV(0xA1620)) = ret;
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}
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