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NeXTSTEP 3.2 (Developer)
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machparam.h
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1993-10-19
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/*
* Copyright (c) 1987 NeXT, Inc.
*
* HISTORY
*
* 20 April 1992 David E. Bohman at NeXT
* Created from 68k version.
* 21-Nov-88 Avadis Tevanian (avie) at NeXT
* Moved assertion definitions to machine independent <kern/assert.h>.
*
* 09-Nov-86 John Seamons (jks) at NeXT
* Ported to NeXT.
*/
#ifndef _I386_MACHPARAM_
#define _I386_MACHPARAM_
#import <mach/vm_param.h>
/*
* Machine dependent 'constants'.
*/
#define NBPG PAGE_SIZE /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT PAGE_SHIFT /* LOG2(NBPG) */
#define CLSIZE 1
#define CLSIZELOG2 0
/*
* Some macros for units conversion
*/
/* Core clicks (NeXT_page_size bytes) to segments and vice versa */
#define ctos(x) (x)
#define stoc(x) (x)
/* clicks to bytes */
#define ctob(x) ((x) << PGSHIFT)
/* bytes to clicks */
#define btoc(x) ((((unsigned)(x)+PGOFSET) >> PGSHIFT))
/*
* Macros to decode processor status word.
*/
#define STATUS_WORD(rpl, ipl) (((ipl) << 8) | (rpl))
#define USERMODE(x) (((x) & 3) == 3)
#define BASEPRI(x) (((x) & (255 << 8)) == 0)
#if defined(KERNEL) || defined(STANDALONE)
#define DELAY(n) us_spin(n)
#else defined(KERNEL) || defined(STANDALONE)
#define DELAY(n) { register int N = (n); while (--N > 0); }
#endif defined(KERNEL) || defined(STANDALONE)
#endif _I386_MACHPARAM_