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/*-
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 * Copyright (c) 1982, 1986, 1989, 1993
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 *        The Regents of the University of California.  All rights reserved.
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 * (c) UNIX System Laboratories, Inc.
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 * All or some portions of this file are derived from material licensed
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 * to the University of California by American Telephone and Telegraph
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 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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 * the permission of UNIX System Laboratories, Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *        @(#)param.h        8.3 (Berkeley) 4/4/95
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 */
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#ifndef _SYS_PARAM_H_
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#define _SYS_PARAM_H_
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#include <conf/config.h>
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#ifndef LOCORE
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#include <sys/types.h>
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#endif
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/*
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 * Machine-independent constants (some used in following include files).
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 * Redefined constants are from POSIX 1003.1 limits file.
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 */
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#include <sys/syslimits.h>
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#define        NCARGS                ARG_MAX                /* max bytes for an exec function */
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#define        NGROUPS                NGROUPS_MAX        /* max number groups */
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#define        NOFILE                OPEN_MAX        /* max open files per process */
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#define        NOGROUP                65535                /* marker for empty group set member */
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#define MAXHOSTNAMELEN        32                /* max hostname size */
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#define        MAXTASKS        256                /* max number of tasks in system */
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#define        MAXTHREADS        128                /* max number of threads per task */
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#define        MAXOBJECTS        32                /* max number of objects per task */
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#define        MAXSYNCS        512                /* max number of synch objects per task */
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#define MAXMEM                (4*1024*1024)        /* max core per task - first # is Mb */
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/* The following name length include a null-terminate character */
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#define MAXTASKNAME        12                /* max task name */
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#define MAXDEVNAME        12                /* max device name */
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#define MAXOBJNAME        16                /* max object name */
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#define MAXEVTNAME        12                /* max event name */
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#define HZ                CONFIG_HZ        /* ticks per second */
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#define MAXIRQS                32                /* max number of irq line */
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#define        PASSWORD_LEN        4                /* fixed length, not counting NULL */
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/*
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 * Priorities.
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 * Probably should not be altered too much.
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 */
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#define PRI_TIMER        15        /* priority for timer thread */
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#define PRI_IST                 16        /* top priority for interrupt threads */
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#define PRI_DPC                 33        /* priority for Deferred Procedure Call */
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#define PRI_IDLE        255        /* priority for idle thread */
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#define PRI_REALTIME        127        /* default priority for real-time thread */
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#define PRI_DEFAULT        200        /* default user priority */
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#define MAXPRI                0
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#define MINPRI                255
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#define NPRI                (MINPRI + 1)        /* number of thread priority */
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/* Server priorities */
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#define PRI_PROC        124        /* process server */
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#define PRI_EXEC        125        /* exec server */
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#define PRI_FS                126        /* file system server */
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#define PRI_POW                100        /* power server */
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#ifndef        NULL
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#if !defined(__cplusplus)
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#define        NULL        ((void *)0)
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#else
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#define        NULL        0
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#endif
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#endif
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/* More types and definitions used throughout the kernel. */
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#ifdef KERNEL
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#include <sys/cdefs.h>
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#endif
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#ifndef KERNEL
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/* Signals. */
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#include <sys/signal.h>
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#endif
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#include <machine/limits.h>
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#include <machine/memory.h>
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#define KSTACKSZ        768                /* kernel stack size */
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#define USRSTACK        (0 + PAGE_SIZE)        /* base address of user stack */
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#define DFLSTKSZ        4096                /* default size of user stack */
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#ifdef CONFIG_MMU
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#define user_area(a)        ((vaddr_t)(a) <  (vaddr_t)USERLIMIT)
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#else
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#define user_area(a)        1
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#endif
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/* Address translation between physical address and kernel viritul address */
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#define ptokv(pa)        (void *)((paddr_t)(pa) + KERNBASE)
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#define kvtop(va)        ((paddr_t)(va) - KERNBASE)
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/*
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 * Round p (pointer or byte index) up to a correctly-aligned value for all
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 * data types (int, long, ...).   The result is u_long and must be cast to
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 * any desired pointer type.
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 */
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#define        _ALIGNBYTES        (sizeof(int) - 1)
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#define        ALIGN(p)        (((unsigned)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)
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/*
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 * Memory page
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 */
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#define PAGE_MASK        (PAGE_SIZE-1)
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#define trunc_page(x)        ((x) & ~PAGE_MASK)
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#define round_page(x)        (((x) + PAGE_MASK) & ~PAGE_MASK)
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/*
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 * MAXPATHLEN defines the longest permissable path length after expanding
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 * symbolic links. It is used to allocate a temporary buffer from the buffer
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 * pool in which to do the name expansion, hence should be a power of two,
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 * and must be less than or equal to MAXBSIZE.  MAXSYMLINKS defines the
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 * maximum number of symbolic links that may be expanded in a path name.
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 * It should be set high enough to allow all legitimate uses, but halt
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 * infinite loops reasonably quickly.
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 */
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#define        MAXPATHLEN        PATH_MAX
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#define MAXSYMLINKS        8
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/* Bit map related macros. */
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#define        setbit(a,i)        ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
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#define        clrbit(a,i)        ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
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#define        isset(a,i)        ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
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#define        isclr(a,i)        (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
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/* Macros for counting and rounding. */
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#ifndef howmany
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#define        howmany(x, y)        (((x)+((y)-1))/(y))
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#endif
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#define        roundup(x, y)        ((((x)+((y)-1))/(y))*(y))
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#define rounddown(x,y)  (((x)/(y))*(y))
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#define powerof2(x)        ((((x)-1)&(x))==0)
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/* Macros for min/max. */
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#define        MIN(a,b) (((a)<(b))?(a):(b))
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#define        MAX(a,b) (((a)>(b))?(a):(b))
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#define        BSIZE        512                /* size of secondary block (bytes) */
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/*
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 * Macro to convert milliseconds and tick.
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 */
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#define mstohz(ms)        (((ms) + 0UL) * HZ / 1000)
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#define hztoms(tick)        ((tick) >= 0x20000 ? \
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                         (((tick) + 0u) / HZ) * 1000u : \
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                         (((tick) + 0u) * 1000u) / HZ)
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#endif /* !_SYS_PARAM_H_ */