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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
#include <mach_assert.h>
/*
* For now we will always go to single user mode, since there is
* no way pass this request through the boot.
*/
int boothowto = 0;
/*
* Should be rewritten in asm anyway.
*/
/*
* ovbcopy - like bcopy, but recognizes overlapping ranges and handles
* them correctly.
*/
ovbcopy(from, to, bytes)
char *from, *to;
int bytes; /* num bytes to copy */
{
/* Assume that bcopy copies left-to-right (low addr first). */
if (from + bytes <= to || to + bytes <= from || to == from)
bcopy(from, to, bytes); /* non-overlapping or no-op*/
else if (from > to)
bcopy(from, to, bytes); /* overlapping but OK */
else {
/* to > from: overlapping, and must copy right-to-left. */
from += bytes - 1;
to += bytes - 1;
while (bytes-- > 0)
*to-- = *from--;
}
}
/* Someone with time should write code to set cpuspeed automagically */
int cpuspeed = 4;
#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); }
delay(n)
{
DELAY(n);
}
#if MACH_ASSERT
/*
* Machine-dependent routine to fill in an array with up to callstack_max
* levels of return pc information.
*/
void machine_callstack(
unsigned long *buf,
int callstack_max)
{
}
#endif /* MACH_ASSERT */
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