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/*-

 * Copyright (c) 1982, 1986, 1989, 1993

 *        The Regents of the University of California.  All rights reserved.

 * (c) UNIX System Laboratories, Inc.

 * All or some portions of this file are derived from material licensed

 * to the University of California by American Telephone and Telegraph

 * Co. or Unix System Laboratories, Inc. and are reproduced herein with

 * the permission of UNIX System Laboratories, Inc.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)param.h        8.3 (Berkeley) 4/4/95

 */

#ifndef _SYS_PARAM_H_

#define _SYS_PARAM_H_

#include <conf/config.h>

#ifndef LOCORE

#include <sys/types.h>

#endif

/*

 * Machine-independent constants (some used in following include files).

 * Redefined constants are from POSIX 1003.1 limits file.

 */

#include <sys/syslimits.h>

#define        NCARGS                ARG_MAX                /* max bytes for an exec function */

#define        NGROUPS                NGROUPS_MAX        /* max number groups */

#define        NOFILE                OPEN_MAX        /* max open files per process */

#define        NOGROUP                65535                /* marker for empty group set member */

#define MAXHOSTNAMELEN        32                /* max hostname size */

#define        MAXTASKS        256                /* max number of tasks in system */

#define        MAXTHREADS        128                /* max number of threads per task */

#define        MAXOBJECTS        32                /* max number of objects per task */

#define        MAXSYNCS        512                /* max number of synch objects per task */

#define MAXMEM                (4*1024*1024)        /* max core per task - first # is Mb */

/* The following name length include a null-terminate character */

#define MAXTASKNAME        12                /* max task name */

#define MAXDEVNAME        12                /* max device name */

#define MAXOBJNAME        16                /* max object name */

#define MAXEVTNAME        12                /* max event name */

#define HZ                CONFIG_HZ        /* ticks per second */

#define MAXIRQS                32                /* max number of irq line */

#define        PASSWORD_LEN        4                /* fixed length, not counting NULL */

/*

 * Priorities.

 * Probably should not be altered too much.

 */

#define PRI_TIMER        15        /* priority for timer thread */

#define PRI_IST                 16        /* top priority for interrupt threads */

#define PRI_DPC                 33        /* priority for Deferred Procedure Call */

#define PRI_IDLE        255        /* priority for idle thread */

#define PRI_REALTIME        127        /* default priority for real-time thread */

#define PRI_DEFAULT        200        /* default user priority */

#define MAXPRI                0

#define MINPRI                255

#define NPRI                (MINPRI + 1)        /* number of thread priority */

/* Server priorities */

#define PRI_PROC        124        /* process server */

#define PRI_EXEC        125        /* exec server */

#define PRI_FS                126        /* file system server */

#define PRI_POW                100        /* power server */

#ifndef        NULL

#if !defined(__cplusplus)

#define        NULL        ((void *)0)

#else

#define        NULL        0

#endif

#endif

/* More types and definitions used throughout the kernel. */

#ifdef KERNEL

#include <sys/cdefs.h>

#endif

#ifndef KERNEL

/* Signals. */

#include <sys/signal.h>

#endif

#include <machine/limits.h>

#include <machine/memory.h>

#define KSTACKSZ        768                /* kernel stack size */

#define USRSTACK        (0 + PAGE_SIZE)        /* base address of user stack */

#define DFLSTKSZ        4096                /* default size of user stack */

#ifdef CONFIG_MMU

#define user_area(a)        ((vaddr_t)(a) <  (vaddr_t)USERLIMIT)

#else

#define user_area(a)        1

#endif

/* Address translation between physical address and kernel viritul address */

#define ptokv(pa)        (void *)((paddr_t)(pa) + KERNBASE)

#define kvtop(va)        ((paddr_t)(va) - KERNBASE)

/*

 * Round p (pointer or byte index) up to a correctly-aligned value for all

 * data types (int, long, ...).   The result is u_long and must be cast to

 * any desired pointer type.

 */

#define        _ALIGNBYTES        (sizeof(int) - 1)

#define        ALIGN(p)        (((unsigned)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)

/*

 * Memory page

 */

#define PAGE_MASK        (PAGE_SIZE-1)

#define trunc_page(x)        ((x) & ~PAGE_MASK)

#define round_page(x)        (((x) + PAGE_MASK) & ~PAGE_MASK)

/*

 * MAXPATHLEN defines the longest permissable path length after expanding

 * symbolic links. It is used to allocate a temporary buffer from the buffer

 * pool in which to do the name expansion, hence should be a power of two,

 * and must be less than or equal to MAXBSIZE.  MAXSYMLINKS defines the

 * maximum number of symbolic links that may be expanded in a path name.

 * It should be set high enough to allow all legitimate uses, but halt

 * infinite loops reasonably quickly.

 */

#define        MAXPATHLEN        PATH_MAX

#define MAXSYMLINKS        8

/* Bit map related macros. */

#define        setbit(a,i)        ((a)[(i)/NBBY] |= 1<<((i)%NBBY))

#define        clrbit(a,i)        ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))

#define        isset(a,i)        ((a)[(i)/NBBY] & (1<<((i)%NBBY)))

#define        isclr(a,i)        (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)

/* Macros for counting and rounding. */

#ifndef howmany

#define        howmany(x, y)        (((x)+((y)-1))/(y))

#endif

#define        roundup(x, y)        ((((x)+((y)-1))/(y))*(y))

#define rounddown(x,y)  (((x)/(y))*(y))

#define powerof2(x)        ((((x)-1)&(x))==0)

/* Macros for min/max. */

#define        MIN(a,b) (((a)<(b))?(a):(b))

#define        MAX(a,b) (((a)>(b))?(a):(b))

#define        BSIZE        512                /* size of secondary block (bytes) */

/*

 * Macro to convert milliseconds and tick.

 */

#define mstohz(ms)        (((ms) + 0UL) * HZ / 1000)

#define hztoms(tick)        ((tick) >= 0x20000 ? \

                         (((tick) + 0u) / HZ) * 1000u : \

                         (((tick) + 0u) * 1000u) / HZ)

#endif /* !_SYS_PARAM_H_ */