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/* $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 <sys/types.h>
#include <machine/vmparam.h>
#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_ */
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