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/*
* Copyright (c) 1995-1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#ifndef _I16_BIOS_H_
#define _I16_BIOS_H_
#include <mach/inline.h>
MACH_INLINE void i16_bios_putchar(int c)
{
asm volatile("int $0x10" : : "a" (0x0e00 | (c & 0xff)), "b" (0x07));
}
MACH_INLINE int i16_bios_getchar()
{
int c;
asm volatile("int $0x16" : "=a" (c) : "a" (0x0000));
c &= 0xff;
return c;
}
MACH_INLINE void i16_bios_warm_boot(void)
{
asm volatile("
cli
movw $0x40,%ax
movw %ax,%ds
movw $0x1234,0x72
ljmp $0xffff,$0x0000
");
}
MACH_INLINE void i16_bios_cold_boot(void)
{
asm volatile("
cli
movw $0x40,%ax
movw %ax,%ds
movw $0x0000,0x72
ljmp $0xffff,$0x0000
");
}
MACH_INLINE unsigned char i16_bios_copy_ext_mem(
unsigned src_la, unsigned dest_la, unsigned short word_count)
{
char buf[48];
unsigned short i, rc;
/* Initialize the descriptor structure. */
for (i = 0; i < sizeof(buf); i++)
buf[i] = 0;
*((unsigned short*)(buf+0x10)) = 0xffff; /* source limit */
*((unsigned long*)(buf+0x12)) = src_la; /* source linear address */
*((unsigned char*)(buf+0x15)) = 0x93; /* source access rights */
*((unsigned short*)(buf+0x18)) = 0xffff; /* dest limit */
*((unsigned long*)(buf+0x1a)) = dest_la; /* dest linear address */
*((unsigned char*)(buf+0x1d)) = 0x93; /* dest access rights */
#if 0
i16_puts("buf:");
for (i = 0; i < sizeof(buf); i++)
i16_writehexb(buf[i]);
i16_puts("");
#endif
/* Make the BIOS call to perform the copy. */
asm volatile("
int $0x15
" : "=a" (rc)
: "a" ((unsigned short)0x8700),
"c" (word_count),
"S" ((unsigned short)(unsigned)buf));
return rc >> 8;
}
#endif _I16_BIOS_H_
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