LCOM1920-T02G10

/*        $NetBSD: param.h,v 1.77 2012/04/20 22:23:24 rmind Exp $        */

/*-

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * William Jolitz.

 *

 * 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        5.8 (Berkeley) 6/28/91

 */

#ifndef _I386_PARAM_H_

#define _I386_PARAM_H_

/*

 * Machine dependent constants for Intel 386.

 */

/*

 * MAXCPUS must be defined before cpu.h inclusion.  Note: i386 might

 * support more CPUs, but due to the limited KVA space available on

 * i386, such support would be inefficient.  Use amd64 instead.

 */

#define        MAXCPUS                32

#ifdef _KERNEL

#include <machine/cpu.h>

#endif

#define        _MACHINE        i386

#define        MACHINE                "i386"

#define        _MACHINE_ARCH        i386

#define        MACHINE_ARCH        "i386"

#define        MID_MACHINE        MID_I386

#define ALIGNED_POINTER(p,t)        1

#define        PGSHIFT                12                /* LOG2(NBPG) */

#define        NBPG                (1 << PGSHIFT)        /* bytes/page */

#define        PGOFSET                (NBPG-1)        /* byte offset into page */

#define        NPTEPG                (NBPG/(sizeof (pt_entry_t)))

#if defined(_KERNEL_OPT)

#include "opt_kernbase.h"

#endif /* defined(_KERNEL_OPT) */

#ifdef KERNBASE_LOCORE

#error "You should only re-define KERNBASE"

#endif

#ifndef        KERNBASE

#define        KERNBASE        0xc0000000UL        /* start of kernel virtual space */

#endif

#define        KERNTEXTOFF        (KERNBASE + 0x100000) /* start of kernel text */

#define        BTOPKERNBASE        (KERNBASE >> PGSHIFT)

#define        DEV_BSHIFT        9                /* log2(DEV_BSIZE) */

#define        DEV_BSIZE        (1 << DEV_BSHIFT)

#define        BLKDEV_IOSIZE        2048

#ifndef        MAXPHYS

#define        MAXPHYS                (64 * 1024)        /* max raw I/O transfer size */

#endif

#define        SSIZE                1                /* initial stack size/NBPG */

#define        SINCR                1                /* increment of stack/NBPG */

#ifndef UPAGES

# ifdef DIAGNOSTIC

#  define        UPAGES                3        /* 2 + 1 page for redzone */

# else

#  define        UPAGES                2        /* normal pages of u-area */

# endif /* DIAGNOSTIC */

#endif /* !defined(UPAGES) */

#define        USPACE                (UPAGES * NBPG)        /* total size of u-area */

#define        INTRSTACKSIZE        8192

#ifndef MSGBUFSIZE

#define MSGBUFSIZE        8*NBPG                /* default message buffer size */

#endif

/*

 * Constants related to network buffer management.

 * MCLBYTES must be no larger than NBPG (the software page size), and,

 * on machines that exchange pages of input or output buffers with mbuf

 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple

 * of the hardware page size.

 */

#define        MSIZE                256                /* size of an mbuf */

#ifndef MCLSHIFT

#define        MCLSHIFT        11                /* convert bytes to m_buf clusters */

                                        /* 2K cluster can hold Ether frame */

#endif        /* MCLSHIFT */

#define        MCLBYTES        (1 << MCLSHIFT)        /* size of a m_buf cluster */

#ifndef NMBCLUSTERS_MAX

#define        NMBCLUSTERS_MAX        (0x2000000 / MCLBYTES)        /* Limit to 64MB for clusters */

#endif

#ifndef NFS_RSIZE

#define NFS_RSIZE        32768

#endif

#ifndef NFS_WSIZE

#define NFS_WSIZE        32768

#endif

/*

 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized

 * logical pages.

 */

#define        NKMEMPAGES_MIN_DEFAULT        ((16 * 1024 * 1024) >> PAGE_SHIFT)

#define        NKMEMPAGES_MAX_DEFAULT        ((360 * 1024 * 1024) >> PAGE_SHIFT)

/*

 * Mach derived conversion macros

 */

#define        x86_round_pdr(x) \

        ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))

#define        x86_trunc_pdr(x)        ((unsigned long)(x) & ~(NBPD_L2 - 1))

#define        x86_btod(x)                ((unsigned long)(x) >> L2_SHIFT)

#define        x86_dtob(x)                ((unsigned long)(x) << L2_SHIFT)

#define        x86_round_page(x)        ((((paddr_t)(x)) + PGOFSET) & ~PGOFSET)

#define        x86_trunc_page(x)        ((paddr_t)(x) & ~PGOFSET)

#define        x86_btop(x)                ((paddr_t)(x) >> PGSHIFT)

#define        x86_ptob(x)                ((paddr_t)(x) << PGSHIFT)

#endif /* _I386_PARAM_H_ */