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Annotation of sys/arch/vax/include/vmparam.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: vmparam.h,v 1.28 2007/04/22 10:05:51 miod Exp $       */
                      2: /*     $NetBSD: vmparam.h,v 1.32 2000/03/07 00:05:59 matt Exp $        */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1990 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * William Jolitz.
                     10:  *
                     11:  * Slightly modified for the VAX port /IC
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. Neither the name of the University nor the names of its contributors
                     22:  *    may be used to endorse or promote products derived from this software
                     23:  *    without specific prior written permission.
                     24:  *
                     25:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     35:  * SUCH DAMAGE.
                     36:  *
                     37:  *     @(#)vmparam.h   5.9 (Berkeley) 5/12/91
                     38:  */
                     39: #ifndef _VMPARAM_H_
                     40: #define _VMPARAM_H_
                     41:
                     42: /*
                     43:  * Machine dependent constants for VAX.
                     44:  */
                     45:
                     46: /*
                     47:  * USRTEXT is the start of the user text/data space, while USRSTACK
                     48:  * is the top (end) of the user stack. Immediately above the user stack
                     49:  * resides kernel.
                     50:  *
                     51:  */
                     52:
                     53: #define USRTEXT                NBPG
                     54: #define USRSTACK       KERNBASE
                     55:
                     56: /*
                     57:  * Virtual memory related constants, all in bytes
                     58:  */
                     59:
                     60: #ifndef MAXTSIZ
                     61: #define MAXTSIZ                (8*1024*1024)           /* max text size */
                     62: #endif
                     63: #ifndef MAXDSIZ
                     64: #define MAXDSIZ                (32*1024*1024)          /* max data size */
                     65: #endif
                     66: #ifndef MAXSSIZ
                     67: #define MAXSSIZ                (8*1024*1024)           /* max stack size */
                     68: #endif
                     69: #ifndef DFLDSIZ
                     70: #define DFLDSIZ                (4*1024*1024)           /* initial data size limit */
                     71: #endif
                     72: #ifndef DFLSSIZ
                     73: #define DFLSSIZ                (512*1024)              /* initial stack size limit */
                     74: #endif
                     75:
                     76: #define STACKGAP_RANDOM        32*1024
                     77:
                     78: #define BRKSIZ         (8*1024*1024)
                     79:
                     80: /*
                     81:  * Size of shared memory map
                     82:  */
                     83:
                     84: #ifndef SHMMAXPGS
                     85: #define SHMMAXPGS      64              /* XXXX should be 1024 */
                     86: #endif
                     87:
                     88: #define VM_PHYSSEG_MAX         1
                     89: #define VM_PHYSSEG_NOADD
                     90: #define VM_PHYSSEG_STRAT       VM_PSTRAT_RANDOM
                     91:
                     92: #define        VM_NFREELIST            1
                     93: #define        VM_FREELIST_DEFAULT     0
                     94:
                     95: /* MD round macros */
                     96: #define        vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
                     97: #define        vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
                     98:
                     99: /* user/kernel map constants */
                    100: #define VM_MIN_ADDRESS         ((vaddr_t)0)
                    101: #define VM_MAXUSER_ADDRESS     ((vaddr_t)KERNBASE)
                    102: #define VM_MAX_ADDRESS         ((vaddr_t)KERNBASE)
                    103: #define VM_MIN_KERNEL_ADDRESS  ((vaddr_t)KERNBASE)
                    104: #define VM_MAX_KERNEL_ADDRESS  ((vaddr_t)(0xC0000000))
                    105:
                    106: #define        USRIOSIZE               (8 * VAX_NPTEPG)        /* 512MB */
                    107: #define        VM_PHYS_SIZE            (USRIOSIZE*VAX_NBPG)
                    108:
                    109: /*
                    110:  * This should be in <machine/pmap.h>, but needs to be in this file
                    111:  * due to include ordering issues.
                    112:  */
                    113: #define        __HAVE_VM_PAGE_MD
                    114:
                    115: struct vm_page_md {
                    116:        struct pv_entry *pv_head;
                    117:        int              pv_attr;       /* write/modified bits */
                    118: };
                    119:
                    120: #define        VM_MDPAGE_INIT(pg) \
                    121:        do { \
                    122:                (pg)->mdpage.pv_head = NULL; \
                    123:                (pg)->mdpage.pv_attr = 0; \
                    124:        } while (0)
                    125:
                    126: #endif