/* $NetBSD: uvm_param.h,v 1.41.20.1 2023/08/09 17:42:01 martin Exp $ */ /* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * The Mach Operating System project at Carnegie-Mellon University. * * 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. * * @(#)vm_param.h 8.2 (Berkeley) 1/9/95 * * * Copyright (c) 1987, 1990 Carnegie-Mellon University. * All rights reserved. * * Authors: Avadis Tevanian, Jr., Michael Wayne Young * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ /* * Machine independent virtual memory parameters. */ #ifndef _VM_PARAM_ #define _VM_PARAM_ #ifdef _KERNEL_OPT #include "opt_modular.h" #include "opt_uvm.h" #endif #ifdef _KERNEL #include #include #endif #if defined(_KERNEL) #if defined(PAGE_SIZE) /* * If PAGE_SIZE is defined at this stage, it must be a constant. */ #if PAGE_SIZE == 0 #error Invalid PAGE_SIZE definition #endif /* * If the platform does not need to support a variable PAGE_SIZE, * then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE. */ #if !defined(MIN_PAGE_SIZE) #define MIN_PAGE_SIZE PAGE_SIZE #endif /* ! MIN_PAGE_SIZE */ #if !defined(MAX_PAGE_SIZE) #define MAX_PAGE_SIZE PAGE_SIZE #endif /* ! MAX_PAGE_SIZE */ #else /* ! PAGE_SIZE */ /* * PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must * be defined. */ #if !defined(MIN_PAGE_SIZE) #error MIN_PAGE_SIZE not defined #endif #if !defined(MAX_PAGE_SIZE) #error MAX_PAGE_SIZE not defined #endif #endif /* PAGE_SIZE */ /* * MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants. */ #if MIN_PAGE_SIZE == 0 #error Invalid MIN_PAGE_SIZE definition #endif #if MAX_PAGE_SIZE == 0 #error Invalid MAX_PAGE_SIZE definition #endif /* * If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use * non-constant PAGE_SIZE, et al for modules. */ #if (MIN_PAGE_SIZE != MAX_PAGE_SIZE) #define __uvmexp_pagesize #if defined(_MODULE) #undef PAGE_SIZE #undef PAGE_MASK #undef PAGE_SHIFT #endif #endif /* * Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not * have ones that are compile-time constants. */ #if !defined(PAGE_SIZE) extern const int *const uvmexp_pagesize; extern const int *const uvmexp_pagemask; extern const int *const uvmexp_pageshift; #define PAGE_SIZE (*uvmexp_pagesize) /* size of page */ #define PAGE_MASK (*uvmexp_pagemask) /* size of page - 1 */ #define PAGE_SHIFT (*uvmexp_pageshift) /* bits to shift for pages */ #endif /* PAGE_SIZE */ #endif /* _KERNEL */ /* * CTL_VM identifiers */ #define VM_METER 1 /* struct vmmeter */ #define VM_LOADAVG 2 /* struct loadavg */ #define VM_UVMEXP 3 /* struct uvmexp */ #define VM_NKMEMPAGES 4 /* kmem_map pages */ #define VM_UVMEXP2 5 /* struct uvmexp_sysctl */ #define VM_ANONMIN 6 #define VM_EXECMIN 7 #define VM_FILEMIN 8 #define VM_MAXSLP 9 #define VM_USPACE 10 #define VM_ANONMAX 11 #define VM_EXECMAX 12 #define VM_FILEMAX 13 #define VM_MINADDRESS 14 #define VM_MAXADDRESS 15 #define VM_PROC 16 /* process information */ #define VM_GUARD_SIZE 17 /* guard size for main thread */ #define VM_THREAD_GUARD_SIZE 18 /* default guard size for new threads */ #define VM_PROC_MAP 1 /* struct kinfo_vmentry */ #ifndef ASSEMBLER /* * Convert addresses to pages and vice versa. * No rounding is used. */ #ifdef _KERNEL #define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT) #define ptoa(x) (((paddr_t)(x)) << PAGE_SHIFT) /* * Round off or truncate to the nearest page. These will work * for either addresses or counts (i.e., 1 byte rounds to 1 page). */ #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) #define trunc_page(x) ((x) & ~PAGE_MASK) #ifndef VM_DEFAULT_ADDRESS_BOTTOMUP #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ round_page((vaddr_t)(da) + (vsize_t)maxdmap) #endif extern unsigned int user_stack_guard_size; extern unsigned int user_thread_stack_guard_size; #ifndef VM_DEFAULT_ADDRESS_TOPDOWN #define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \ trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz) - user_stack_guard_size) #endif extern int ubc_nwins; /* number of UBC mapping windows */ extern const int ubc_winshift; /* shift for a UBC mapping window */ #else /* out-of-kernel versions of round_page and trunc_page */ #define round_page(x) \ ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ vm_page_size) #define trunc_page(x) \ ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) #endif /* _KERNEL */ /* * typedefs, necessary for standard UVM headers. */ typedef unsigned int uvm_flag_t; typedef int vm_inherit_t; /* XXX: inheritance codes */ typedef off_t voff_t; /* XXX: offset within a uvm_object */ typedef voff_t pgoff_t; /* XXX: number of pages within a uvm object */ #endif /* ASSEMBLER */ #endif /* _VM_PARAM_ */