 @@ -1,239 +1,239 @@
-/*	$NetBSD: uvm_param.h,v 1.38 2018/08/22 01:05:24 msaitoh Exp $	*/
+/*	$NetBSD: uvm_param.h,v 1.39 2020/06/25 16:36:43 mlelstv 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>
 #include <sys/resourcevar.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 LKMs.
  */
 #if (MIN_PAGE_SIZE != MAX_PAGE_SIZE)
 #define	__uvmexp_pagesize
 #if defined(_LKM) || 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 int		ubc_winshift;	/* shift for a UBC mapping window */
+extern const int	ubc_winshift;	/* shift for a UBC mapping window */
 extern u_int		uvm_emap_size;	/* size of emap */
 #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_ */