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Annotation of sys/arch/mips64/include/param.h, Revision 1.1

1.1     ! nbrk        1: /*      $OpenBSD: param.h,v 1.17 2007/05/28 21:02:49 thib Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1988 University of Utah.
        !             5:  * Copyright (c) 1992, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * the Systems Programming Group of the University of Utah Computer
        !            10:  * Science Department and Ralph Campbell.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. Neither the name of the University nor the names of its contributors
        !            21:  *    may be used to endorse or promote products derived from this software
        !            22:  *    without specific prior written permission.
        !            23:  *
        !            24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            34:  * SUCH DAMAGE.
        !            35:  *
        !            36:  *     from: Utah Hdr: machparam.h 1.11 89/08/14
        !            37:  *     from: @(#)param.h       8.1 (Berkeley) 6/10/93
        !            38:  */
        !            39:
        !            40: #ifndef _MIPS_PARAM_H_
        !            41: #define _MIPS_PARAM_H_
        !            42:
        !            43: #ifdef _KERNEL
        !            44: #ifdef _LOCORE
        !            45: #include <machine/psl.h>
        !            46: #else
        !            47: #include <machine/cpu.h>
        !            48: #endif
        !            49: #endif
        !            50:
        !            51: /*
        !            52:  * Round p (pointer or byte index) up to a correctly-aligned value for all
        !            53:  * data types (int, long, ...).   The result is u_int and must be cast to
        !            54:  * any desired pointer type.
        !            55:  */
        !            56: #define        ALIGNBYTES      7
        !            57: #define        ALIGN(p)        (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
        !            58: #define ALIGNED_POINTER(p, t)  ((((u_long)(p)) & (sizeof (t) - 1)) == 0)
        !            59:
        !            60: #define        NBPG            4096            /* bytes/page */
        !            61: #define        PGOFSET         (NBPG-1)        /* byte offset into page */
        !            62: #define        PGSHIFT         12              /* LOG2(NBPG) */
        !            63:
        !            64: #define PAGE_SHIFT     12
        !            65: #define PAGE_SIZE      (1 << PAGE_SHIFT)
        !            66: #define PAGE_MASK      (PAGE_SIZE - 1)
        !            67:
        !            68: #define        NPTEPG          (NBPG/4)
        !            69:
        !            70: #define NBSEG          0x400000        /* bytes/segment */
        !            71: #define        SEGOFSET        (NBSEG-1)       /* byte offset into segment */
        !            72: #define        SEGSHIFT        22              /* LOG2(NBSEG) */
        !            73:
        !            74: #ifdef __LP64__
        !            75: #define        KERNBASE        0xffffffff80000000L     /* start of kernel virtual */
        !            76: #else
        !            77: #define        KERNBASE        0x80000000      /* start of kernel virtual */
        !            78: #endif
        !            79:
        !            80: #define        DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
        !            81: #define        DEV_BSIZE       (1 << DEV_BSHIFT)
        !            82: #define BLKDEV_IOSIZE  2048
        !            83: #define        MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
        !            84:
        !            85: #ifdef __LP64__
        !            86: #define        UPAGES          4               /* pages of u-area */
        !            87: #else
        !            88: #define        UPAGES          2               /* pages of u-area */
        !            89: #endif
        !            90:
        !            91: #define USPACE         (UPAGES*NBPG)   /* size of u-area in bytes */
        !            92: #define        USPACE_ALIGN    (2*NBPG)        /* u-area alignment 0-none */
        !            93:
        !            94: /*
        !            95:  * Constants related to network buffer management.
        !            96:  */
        !            97: #define        NMBCLUSTERS     4096            /* map size, max cluster allocation */
        !            98:
        !            99: #define        MSGBUFSIZE      8192
        !           100:
        !           101: /* Default malloc arena size */
        !           102: #define        NKMEMPAGES_MIN_DEFAULT  ((8 * 1024 * 1024) >> PAGE_SHIFT)
        !           103: #define        NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
        !           104:
        !           105: /* pages ("clicks") (4096 bytes) to disk blocks */
        !           106: #define        ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
        !           107: #define        dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
        !           108:
        !           109: /* pages to bytes */
        !           110: #define        ctob(x) ((x) << PGSHIFT)
        !           111: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
        !           112:
        !           113: /* bytes to disk blocks */
        !           114: #define        btodb(x)        ((x) >> DEV_BSHIFT)
        !           115: #define dbtob(x)       ((x) << DEV_BSHIFT)
        !           116:
        !           117: #ifdef _KERNEL
        !           118: #ifndef _LOCORE
        !           119:
        !           120: #define        DELAY(n)        delay(n)
        !           121: void delay(int);
        !           122: void nanodelay(int);
        !           123: #endif
        !           124: #endif /* !_KERNEL */
        !           125:
        !           126: #endif /* !_MIPS_PARAM_H_ */