param.h

T－kernel Tcp/ip Protocol Stack Sample

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 * Copyright (C) 2001-2004 MITSUBISHI ELECTRIC CORPORATION and
 * RENESAS SOLUTIONS CORPORATION
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 *	@(#)param.h	8.3 (Berkeley) 4/4/95
 * $Id: param.h,v 1.15.2.2 1996/12/15 09:54:28 davidg Exp $
 */

#ifndef _SYS_PARAM_H_
#define _SYS_PARAM_H_

/*
 * Priorities.  Note that with 32 run queues, differences less than 4 are
 * insignificant.
 */
#define	PSWP	0
#define	PVM	4
#define	PINOD	8
#define	PRIBIO	16
#define	PVFS	20
#define	PZERO	22		/* No longer magic, shouldn't be here.  XXX */
#define	PSOCK	24
#define	PWAIT	32
#define	PLOCK	36
#define	PPAUSE	40
#define	PUSER	50
#define	MAXPRI	127		/* Priorities range from 0 through MAXPRI. */

#define	PRIMASK	0x0ff
#define	PCATCH	0x100		/* OR'd with pri for tsleep to check signals */

/* Macros for counting and rounding. */
#ifndef howmany
#define howmany(x, y)   (((x)+((y)-1))/(y))
#endif
#define rounddown(x, y) (((x)/(y))*(y))
#define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))  /* to any y */
#define roundup2(x, y)  (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
#define powerof2(x)     ((((x)-1)&(x))==0)

/* Macros for min/max. */
#ifndef KERNEL
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif


#endif	/* !_SYS_PARAM_H_ */