144 lines
5.1 KiB
C
144 lines
5.1 KiB
C
/* $OpenBSD: uvm.h,v 1.73 2024/04/02 08:39:17 deraadt Exp $ */
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/* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
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*/
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#ifndef _UVM_UVM_H_
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#define _UVM_UVM_H_
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#include <uvm/uvm_extern.h>
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#include <uvm/uvm_amap.h>
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#include <uvm/uvm_aobj.h>
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#include <uvm/uvm_fault.h>
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#include <uvm/uvm_glue.h>
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#include <uvm/uvm_km.h>
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#include <uvm/uvm_swap.h>
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#include <uvm/uvm_pmemrange.h>
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/*
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* uvm structure (vm global state: collected in one structure for ease
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* of reference...)
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*
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* Locks used to protect struct members in this file:
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* Q uvm.pageqlock
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* F uvm.fpageqlock
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*/
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struct uvm {
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/* vm_page related parameters */
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/* vm_page queues */
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struct pglist page_active; /* [Q] allocated pages, in use */
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struct pglist page_inactive; /* [Q] pages inactive (reclaim/free) */
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/* Lock order: pageqlock, then fpageqlock. */
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struct mutex pageqlock; /* [] lock for active/inactive page q */
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struct mutex fpageqlock; /* [] lock for free page q + pdaemon */
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boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
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struct uvm_pmr_control pmr_control; /* [F] pmemrange data */
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/* page daemon trigger */
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int pagedaemon; /* daemon sleeps on this */
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struct proc *pagedaemon_proc; /* daemon's pid */
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/* aiodone daemon trigger */
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int aiodoned; /* daemon sleeps on this */
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struct proc *aiodoned_proc; /* daemon's pid */
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struct mutex aiodoned_lock;
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/* static kernel map entry pool */
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SLIST_HEAD(, vm_map_entry) kentry_free; /* free page pool */
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/* aio_done is locked by uvm.aiodoned_lock. */
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TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
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/* kernel object: to support anonymous pageable kernel memory */
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struct uvm_object *kernel_object;
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};
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/*
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* vm_map_entry etype bits:
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*/
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#define UVM_ET_OBJ 0x0001 /* it is a uvm_object */
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#define UVM_ET_SUBMAP 0x0002 /* it is a vm_map submap */
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#define UVM_ET_COPYONWRITE 0x0004 /* copy_on_write */
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#define UVM_ET_NEEDSCOPY 0x0008 /* needs_copy */
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#define UVM_ET_HOLE 0x0010 /* no backend */
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#define UVM_ET_NOFAULT 0x0020 /* don't fault */
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#define UVM_ET_STACK 0x0040 /* this is a stack */
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#define UVM_ET_WC 0x0080 /* write combining */
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#define UVM_ET_CONCEAL 0x0100 /* omit from dumps */
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#define UVM_ET_IMMUTABLE 0x0400 /* entry may not be changed */
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#define UVM_ET_FREEMAPPED 0x8000 /* map entry is on free list (DEBUG) */
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#define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
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#define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
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#define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
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#define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
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#define UVM_ET_ISHOLE(E) (((E)->etype & UVM_ET_HOLE) != 0)
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#define UVM_ET_ISNOFAULT(E) (((E)->etype & UVM_ET_NOFAULT) != 0)
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#define UVM_ET_ISSTACK(E) (((E)->etype & UVM_ET_STACK) != 0)
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#define UVM_ET_ISWC(E) (((E)->etype & UVM_ET_WC) != 0)
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#define UVM_ET_ISCONCEAL(E) (((E)->etype & UVM_ET_CONCEAL) != 0)
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#ifdef _KERNEL
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/*
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* holds all the internal UVM data
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*/
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extern struct uvm uvm;
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/*
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* UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
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*/
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#if defined(UVM_PAGE_TRKOWN)
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#define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
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#else
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#define UVM_PAGE_OWN(PG, TAG) /* nothing */
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#endif /* UVM_PAGE_TRKOWN */
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/*
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* uvm_map internal functions.
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* Used by uvm_map address selectors.
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*/
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struct vm_map_entry *uvm_map_entrybyaddr(struct uvm_map_addr *, vaddr_t);
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int uvm_map_isavail(struct vm_map *,
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struct uvm_addr_state *,
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struct vm_map_entry **, struct vm_map_entry**,
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vaddr_t, vsize_t);
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struct uvm_addr_state *uvm_map_uaddr(struct vm_map *, vaddr_t);
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struct uvm_addr_state *uvm_map_uaddr_e(struct vm_map *, struct vm_map_entry *);
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#define VMMAP_FREE_START(_entry) ((_entry)->end + (_entry)->guard)
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#define VMMAP_FREE_END(_entry) ((_entry)->end + (_entry)->guard + \
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(_entry)->fspace)
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#endif /* _KERNEL */
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#endif /* _UVM_UVM_H_ */
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