/* $NetBSD: vmparam.h,v 1.29 2006/01/27 18:37:49 cdi Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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. * * @(#)vmparam.h 8.1 (Berkeley) 6/11/93 */ /* * Machine dependent constants for Sun-4c SPARC */ #ifndef VMPARAM_H #define VMPARAM_H /* * We use 8K VM pages on the Sun4U. Override the PAGE_* definitions * to be compile-time constants. */ #define PAGE_SHIFT 13 #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) /* * The kernel itself is mapped by the boot loader with 4Mb locked VM pages, * so let's keep 4Mb definitions here as well. */ #define PAGE_SHIFT_4M 22 #define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M) #define PAGE_MASK_4M (PAGE_SIZE_4M-1) /* * USRSTACK is the top (end) of the user stack. */ #define USRSTACK32 0xffffe000L #ifdef __arch64__ #define USRSTACK 0xffffffffffffe000L #else #define USRSTACK USRSTACK32 #endif /* * Virtual memory related constants, all in bytes */ /* #ifdef __arch64__ */ #if 0 /* * 64-bit limits: * * Since the compiler generates `call' instructions we can't * have more than 4GB in a single text segment. * * And since we only have a 40-bit adderss space, allow half * of that for data and the other half for stack. */ #ifndef MAXTSIZ #define MAXTSIZ (4L*1024*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (128L*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (1L<<39) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ MAXDSIZ /* max stack size */ #endif #else /* * 32-bit limits: * * We only have 4GB to play with. Limit stack, data, and text * each to half of that. * * This is silly. Apparently if we go above these numbers * integer overflows in other parts of the kernel cause hangs. */ #ifndef MAXTSIZ #define MAXTSIZ (1*1024*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (128*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (1*1024*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ (8*1024*1024) /* max stack size */ #endif #endif /* * 32-bit emulation limits. */ #ifndef MAXTSIZ32 #define MAXTSIZ32 (1*1024*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ32 #define DFLDSIZ32 (128*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ32 #define MAXDSIZ32 (1*1024*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ32 #define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ32 #define MAXSSIZ32 (8*1024*1024) /* max stack size */ #endif /* * Size of shared memory map */ #ifndef SHMMAXPGS #define SHMMAXPGS 1024 #endif /* * Mach derived constants */ /* * User/kernel map constants. */ #define VM_MIN_ADDRESS ((vaddr_t)0) #define VM_MAX_ADDRESS ((vaddr_t)-1) #define VM_MAXUSER_ADDRESS ((vaddr_t)-1) #define VM_MAXUSER_ADDRESS32 ((vaddr_t)(0x00000000ffffffffL&~PGOFSET)) #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) #define VM_PHYSSEG_MAX 32 /* up to 32 segments */ #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ #define VM_NFREELIST 1 #define VM_FREELIST_DEFAULT 0 #ifdef _KERNEL #define __HAVE_VM_PAGE_MD /* * For each struct vm_page, there is a list of all currently valid virtual * mappings of that page. An entry is a pv_entry_t. */ struct pmap; typedef struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_t pv_va; /* virtual address for mapping */ } *pv_entry_t; /* PV flags encoded in the low bits of the VA of the first pv_entry */ struct vm_page_md { struct pv_entry mdpg_pvh; }; #define VM_MDPAGE_INIT(pg) \ do { \ (pg)->mdpage.mdpg_pvh.pv_next = NULL; \ (pg)->mdpage.mdpg_pvh.pv_pmap = NULL; \ (pg)->mdpage.mdpg_pvh.pv_va = 0; \ } while (/*CONSTCOND*/0) #endif /* _KERNEL */ #endif