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/* $OpenBSD: uvm.h,v 1.73 2024/04/02 08:39:17 deraadt Exp $ */
/* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
*/
#ifndef _UVM_UVM_H_
#define _UVM_UVM_H_
#include <uvm/uvm_extern.h>
#include <uvm/uvm_amap.h>
#include <uvm/uvm_aobj.h>
#include <uvm/uvm_fault.h>
#include <uvm/uvm_glue.h>
#include <uvm/uvm_km.h>
#include <uvm/uvm_swap.h>
#include <uvm/uvm_pmemrange.h>
/*
* uvm structure (vm global state: collected in one structure for ease
* of reference...)
*
* Locks used to protect struct members in this file:
* Q uvm.pageqlock
* F uvm.fpageqlock
*/
struct uvm {
/* vm_page related parameters */
/* vm_page queues */
struct pglist page_active; /* [Q] allocated pages, in use */
struct pglist page_inactive; /* [Q] pages inactive (reclaim/free) */
/* Lock order: pageqlock, then fpageqlock. */
struct mutex pageqlock; /* [] lock for active/inactive page q */
struct mutex fpageqlock; /* [] lock for free page q + pdaemon */
boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
struct uvm_pmr_control pmr_control; /* [F] pmemrange data */
/* page daemon trigger */
int pagedaemon; /* daemon sleeps on this */
struct proc *pagedaemon_proc; /* daemon's pid */
/* aiodone daemon trigger */
int aiodoned; /* daemon sleeps on this */
struct proc *aiodoned_proc; /* daemon's pid */
struct mutex aiodoned_lock;
/* static kernel map entry pool */
SLIST_HEAD(, vm_map_entry) kentry_free; /* free page pool */
/* aio_done is locked by uvm.aiodoned_lock. */
TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
/* kernel object: to support anonymous pageable kernel memory */
struct uvm_object *kernel_object;
};
/*
* vm_map_entry etype bits:
*/
#define UVM_ET_OBJ 0x0001 /* it is a uvm_object */
#define UVM_ET_SUBMAP 0x0002 /* it is a vm_map submap */
#define UVM_ET_COPYONWRITE 0x0004 /* copy_on_write */
#define UVM_ET_NEEDSCOPY 0x0008 /* needs_copy */
#define UVM_ET_HOLE 0x0010 /* no backend */
#define UVM_ET_NOFAULT 0x0020 /* don't fault */
#define UVM_ET_STACK 0x0040 /* this is a stack */
#define UVM_ET_WC 0x0080 /* write combining */
#define UVM_ET_CONCEAL 0x0100 /* omit from dumps */
#define UVM_ET_IMMUTABLE 0x0400 /* entry may not be changed */
#define UVM_ET_FREEMAPPED 0x8000 /* map entry is on free list (DEBUG) */
#define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
#define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
#define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
#define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
#define UVM_ET_ISHOLE(E) (((E)->etype & UVM_ET_HOLE) != 0)
#define UVM_ET_ISNOFAULT(E) (((E)->etype & UVM_ET_NOFAULT) != 0)
#define UVM_ET_ISSTACK(E) (((E)->etype & UVM_ET_STACK) != 0)
#define UVM_ET_ISWC(E) (((E)->etype & UVM_ET_WC) != 0)
#define UVM_ET_ISCONCEAL(E) (((E)->etype & UVM_ET_CONCEAL) != 0)
#ifdef _KERNEL
/*
* holds all the internal UVM data
*/
extern struct uvm uvm;
/*
* UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
*/
#if defined(UVM_PAGE_TRKOWN)
#define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
#else
#define UVM_PAGE_OWN(PG, TAG) /* nothing */
#endif /* UVM_PAGE_TRKOWN */
/*
* uvm_map internal functions.
* Used by uvm_map address selectors.
*/
struct vm_map_entry *uvm_map_entrybyaddr(struct uvm_map_addr *, vaddr_t);
int uvm_map_isavail(struct vm_map *,
struct uvm_addr_state *,
struct vm_map_entry **, struct vm_map_entry**,
vaddr_t, vsize_t);
struct uvm_addr_state *uvm_map_uaddr(struct vm_map *, vaddr_t);
struct uvm_addr_state *uvm_map_uaddr_e(struct vm_map *, struct vm_map_entry *);
#define VMMAP_FREE_START(_entry) ((_entry)->end + (_entry)->guard)
#define VMMAP_FREE_END(_entry) ((_entry)->end + (_entry)->guard + \
(_entry)->fspace)
#endif /* _KERNEL */
#endif /* _UVM_UVM_H_ */
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