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Annotation of sys/arch/mips64/include/param.h, Revision 1.1.1.1

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_ */