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NetBSD/sys/uvm/uvm_extern.h
thorpej b008f5f25a Make PMAP_PAGEIDLEZERO() return a boolean value. FALSE indidcates 
that the page being zero'd was not completed and that page zeroing
should be aborted.  This may be used by machine-dependent code doing
slow page access to reduce the latency of running a process that has
become runnable while in the middle of doing a slow page zero.
2000-09-21 17:46:04 +00:00

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/* $NetBSD: uvm_extern.h,v 1.50 2000/09/21 17:46:04 thorpej 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor and
* Washington University.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp
*/
/*-
* Copyright (c) 1991, 1992, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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_extern.h 8.5 (Berkeley) 5/3/95
*/
#ifndef _UVM_UVM_EXTERN_H_
#define _UVM_UVM_EXTERN_H_
/*
* uvm_extern.h: this file defines the external interface to the VM system.
*
* this should be the only file included by non-VM parts of the kernel
* which need access to VM services. if you want to know the interface
* to the MI VM layer without knowing the details, this is the file to
* learn.
*
* NOTE: vm system calls are prototyped in syscallargs.h
*/
/*
* typedefs, necessary for standard UVM headers.
*/
typedef unsigned int uvm_flag_t;
typedef int vm_fault_t;
typedef int vm_inherit_t; /* XXX: inheritance codes */
typedef off_t voff_t; /* XXX: offset within a uvm_object */
union vm_map_object;
typedef union vm_map_object vm_map_object_t;
struct vm_map_entry;
typedef struct vm_map_entry *vm_map_entry_t;
struct vm_map;
typedef struct vm_map *vm_map_t;
struct vm_page;
typedef struct vm_page *vm_page_t;
/*
* defines
*/
/*
* the following defines are for uvm_map and functions which call it.
*/
/* protections bits */
#define UVM_PROT_MASK 0x07 /* protection mask */
#define UVM_PROT_NONE 0x00 /* protection none */
#define UVM_PROT_ALL 0x07 /* everything */
#define UVM_PROT_READ 0x01 /* read */
#define UVM_PROT_WRITE 0x02 /* write */
#define UVM_PROT_EXEC 0x04 /* exec */
/* protection short codes */
#define UVM_PROT_R 0x01 /* read */
#define UVM_PROT_W 0x02 /* write */
#define UVM_PROT_RW 0x03 /* read-write */
#define UVM_PROT_X 0x04 /* exec */
#define UVM_PROT_RX 0x05 /* read-exec */
#define UVM_PROT_WX 0x06 /* write-exec */
#define UVM_PROT_RWX 0x07 /* read-write-exec */
/* 0x08: not used */
/* inherit codes */
#define UVM_INH_MASK 0x30 /* inherit mask */
#define UVM_INH_SHARE 0x00 /* "share" */
#define UVM_INH_COPY 0x10 /* "copy" */
#define UVM_INH_NONE 0x20 /* "none" */
#define UVM_INH_DONATE 0x30 /* "donate" << not used */
/* 0x40, 0x80: not used */
/* bits 0x700: max protection, 0x800: not used */
/* bits 0x7000: advice, 0x8000: not used */
/* advice: matches MADV_* from sys/mman.h */
#define UVM_ADV_NORMAL 0x0 /* 'normal' */
#define UVM_ADV_RANDOM 0x1 /* 'random' */
#define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */
/* 0x3: will need, 0x4: dontneed */
#define UVM_ADV_MASK 0x7 /* mask */
/* mapping flags */
#define UVM_FLAG_FIXED 0x010000 /* find space */
#define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */
#define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */
#define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */
#define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */
#define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */
/* macros to extract info */
#define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK)
#define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4)
#define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK)
#define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK)
#define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \
((MAXPROT << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS))
/* magic offset value */
#define UVM_UNKNOWN_OFFSET ((voff_t) -1)
/* offset not known(obj) or don't care(!obj) */
/*
* the following defines are for uvm_km_kmemalloc's flags
*/
#define UVM_KMF_NOWAIT 0x1 /* matches M_NOWAIT */
#define UVM_KMF_VALLOC 0x2 /* allocate VA only */
#define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */
/*
* the following defines the strategies for uvm_pagealloc_strat()
*/
#define UVM_PGA_STRAT_NORMAL 0 /* high -> low free list walk */
#define UVM_PGA_STRAT_ONLY 1 /* only specified free list */
#define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */
/*
* flags for uvm_pagealloc_strat()
*/
#define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */
#define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */
/*
* lockflags that control the locking behavior of various functions.
*/
#define UVM_LK_ENTER 0x00000001 /* map locked on entry */
#define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */
/*
* structures
*/
struct core;
struct mount;
struct pglist;
struct proc;
struct ucred;
struct uio;
struct uvm_object;
struct vm_anon;
struct vmspace;
struct pmap;
struct vnode;
struct simplelock;
/*
* uvmexp: global data structures that are exported to parts of the kernel
* other than the vm system.
*/
struct uvmexp {
/* vm_page constants */
int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */
int pagemask; /* page mask */
int pageshift; /* page shift */
/* vm_page counters */
int npages; /* number of pages we manage */
int free; /* number of free pages */
int active; /* number of active pages */
int inactive; /* number of pages that we free'd but may want back */
int paging; /* number of pages in the process of being paged out */
int wired; /* number of wired pages */
int zeropages; /* number of zero'd pages */
int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
int reserve_kernel; /* number of pages reserved for kernel */
/* pageout params */
int freemin; /* min number of free pages */
int freetarg; /* target number of free pages */
int inactarg; /* target number of inactive pages */
int wiredmax; /* max number of wired pages */
/* swap */
int nswapdev; /* number of configured swap devices in system */
int swpages; /* number of PAGE_SIZE'ed swap pages */
int swpguniq; /* number of swap pages in use, not also in RAM */
int swpginuse; /* number of swap pages in use */
int swpgonly; /* number of swap pages in use, not also in RAM */
int nswget; /* number of times fault calls uvm_swap_get() */
int nanon; /* number total of anon's in system */
int nanonneeded;/* number of anons currently needed */
int nfreeanon; /* number of free anon's */
/* stat counters */
int faults; /* page fault count */
int traps; /* trap count */
int intrs; /* interrupt count */
int swtch; /* context switch count */
int softs; /* software interrupt count */
int syscalls; /* system calls */
int pageins; /* pagein operation count */
/* pageouts are in pdpageouts below */
int swapins; /* swapins */
int swapouts; /* swapouts */
int pgswapin; /* pages swapped in */
int pgswapout; /* pages swapped out */
int forks; /* forks */
int forks_ppwait; /* forks where parent waits */
int forks_sharevm; /* forks where vmspace is shared */
int pga_zerohit; /* pagealloc where zero wanted and zero
was available */
int pga_zeromiss; /* pagealloc where zero wanted and zero
not available */
int zeroaborts; /* number of times page zeroing was
aborted */
/* fault subcounters */
int fltnoram; /* number of times fault was out of ram */
int fltnoanon; /* number of times fault was out of anons */
int fltpgwait; /* number of times fault had to wait on a page */
int fltpgrele; /* number of times fault found a released page */
int fltrelck; /* number of times fault relock called */
int fltrelckok; /* number of times fault relock is a success */
int fltanget; /* number of times fault gets anon page */
int fltanretry; /* number of times fault retrys an anon get */
int fltamcopy; /* number of times fault clears "needs copy" */
int fltnamap; /* number of times fault maps a neighbor anon page */
int fltnomap; /* number of times fault maps a neighbor obj page */
int fltlget; /* number of times fault does a locked pgo_get */
int fltget; /* number of times fault does an unlocked get */
int flt_anon; /* number of times fault anon (case 1a) */
int flt_acow; /* number of times fault anon cow (case 1b) */
int flt_obj; /* number of times fault is on object page (2a) */
int flt_prcopy; /* number of times fault promotes with copy (2b) */
int flt_przero; /* number of times fault promotes with zerofill (2b) */
/* daemon counters */
int pdwoke; /* number of times daemon woke up */
int pdrevs; /* number of times daemon rev'd clock hand */
int pdswout; /* number of times daemon called for swapout */
int pdfreed; /* number of pages daemon freed since boot */
int pdscans; /* number of pages daemon scaned since boot */
int pdanscan; /* number of anonymous pages scanned by daemon */
int pdobscan; /* number of object pages scanned by daemon */
int pdreact; /* number of pages daemon reactivated since boot */
int pdbusy; /* number of times daemon found a busy page */
int pdpageouts; /* number of times daemon started a pageout */
int pdpending; /* number of times daemon got a pending pagout */
int pddeact; /* number of pages daemon deactivates */
/* kernel memory objects: managed by uvm_km_kmemalloc() only! */
struct uvm_object *kmem_object;
struct uvm_object *mb_object;
};
#ifdef _KERNEL
extern struct uvmexp uvmexp;
#endif
/*
* Finally, bring in standard UVM headers.
*/
#include <sys/vmmeter.h>
#include <sys/queue.h>
#include <uvm/uvm_param.h>
#include <sys/lock.h>
#include <uvm/uvm_prot.h>
#include <uvm/uvm_page.h>
#include <uvm/uvm_pmap.h>
#include <uvm/uvm_map.h>
#include <uvm/uvm_fault.h>
#include <uvm/uvm_pager.h>
/*
* Shareable process virtual address space.
* May eventually be merged with vm_map.
* Several fields are temporary (text, data stuff).
*/
struct vmspace {
struct vm_map vm_map; /* VM address map */
int vm_refcnt; /* number of references */
caddr_t vm_shm; /* SYS5 shared memory private data XXX */
/* we copy from vm_startcopy to the end of the structure on fork */
#define vm_startcopy vm_rssize
segsz_t vm_rssize; /* current resident set size in pages */
segsz_t vm_swrss; /* resident set size before last swap */
segsz_t vm_tsize; /* text size (pages) XXX */
segsz_t vm_dsize; /* data size (pages) XXX */
segsz_t vm_ssize; /* stack size (pages) */
caddr_t vm_taddr; /* user virtual address of text XXX */
caddr_t vm_daddr; /* user virtual address of data XXX */
caddr_t vm_maxsaddr; /* user VA at max stack growth */
};
#ifdef _KERNEL
/*
* the various kernel maps, owned by MD code
*/
extern vm_map_t exec_map;
extern vm_map_t kernel_map;
extern vm_map_t kmem_map;
extern vm_map_t mb_map;
extern vm_map_t phys_map;
/*
* macros
*/
/* zalloc zeros memory, alloc does not */
#define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE)
#define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE)
#endif /* _KERNEL */
#ifdef pmap_resident_count
#define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap))
#else
#define vm_resident_count(vm) ((vm)->vm_rssize)
#endif
/* XXX clean up later */
struct buf;
struct loadavg;
struct proc;
struct pmap;
struct vmspace;
struct vmtotal;
struct mount;
struct vnode;
struct core;
#ifdef _KERNEL
/* vm_machdep.c */
void vmapbuf __P((struct buf *, vsize_t));
void vunmapbuf __P((struct buf *, vsize_t));
void pagemove __P((caddr_t, caddr_t, size_t));
#ifndef cpu_swapin
void cpu_swapin __P((struct proc *));
#endif
#ifndef cpu_swapout
void cpu_swapout __P((struct proc *));
#endif
/* uvm_aobj.c */
struct uvm_object *uao_create __P((vsize_t, int));
void uao_detach __P((struct uvm_object *));
void uao_detach_locked __P((struct uvm_object *));
void uao_reference __P((struct uvm_object *));
void uao_reference_locked __P((struct uvm_object *));
/* uvm_fault.c */
int uvm_fault __P((vm_map_t, vaddr_t,
vm_fault_t, vm_prot_t));
/* handle a page fault */
/* uvm_glue.c */
#if defined(KGDB)
void uvm_chgkprot __P((caddr_t, size_t, int));
#endif
void uvm_fork __P((struct proc *, struct proc *, boolean_t,
void *, size_t, void (*)(void *), void *));
void uvm_exit __P((struct proc *));
void uvm_init_limits __P((struct proc *));
boolean_t uvm_kernacc __P((caddr_t, size_t, int));
__dead void uvm_scheduler __P((void)) __attribute__((noreturn));
void uvm_swapin __P((struct proc *));
boolean_t uvm_useracc __P((caddr_t, size_t, int));
int uvm_vslock __P((struct proc *, caddr_t, size_t,
vm_prot_t));
void uvm_vsunlock __P((struct proc *, caddr_t, size_t));
/* uvm_init.c */
void uvm_init __P((void));
/* init the uvm system */
/* uvm_io.c */
int uvm_io __P((vm_map_t, struct uio *));
/* uvm_km.c */
vaddr_t uvm_km_alloc1 __P((vm_map_t, vsize_t, boolean_t));
void uvm_km_free __P((vm_map_t, vaddr_t, vsize_t));
void uvm_km_free_wakeup __P((vm_map_t, vaddr_t,
vsize_t));
vaddr_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *,
vsize_t, int));
struct vm_map *uvm_km_suballoc __P((vm_map_t, vaddr_t *,
vaddr_t *, vsize_t, int,
boolean_t, vm_map_t));
vaddr_t uvm_km_valloc __P((vm_map_t, vsize_t));
vaddr_t uvm_km_valloc_wait __P((vm_map_t, vsize_t));
vaddr_t uvm_km_valloc_prefer_wait __P((vm_map_t, vsize_t,
voff_t));
vaddr_t uvm_km_alloc_poolpage1 __P((vm_map_t,
struct uvm_object *, boolean_t));
void uvm_km_free_poolpage1 __P((vm_map_t, vaddr_t));
#define uvm_km_alloc_poolpage(waitok) uvm_km_alloc_poolpage1(kmem_map, \
uvmexp.kmem_object, (waitok))
#define uvm_km_free_poolpage(addr) uvm_km_free_poolpage1(kmem_map, (addr))
/* uvm_map.c */
int uvm_map __P((vm_map_t, vaddr_t *, vsize_t,
struct uvm_object *, voff_t, vsize_t,
uvm_flag_t));
int uvm_map_pageable __P((vm_map_t, vaddr_t,
vaddr_t, boolean_t, int));
int uvm_map_pageable_all __P((vm_map_t, int, vsize_t));
boolean_t uvm_map_checkprot __P((vm_map_t, vaddr_t,
vaddr_t, vm_prot_t));
int uvm_map_protect __P((vm_map_t, vaddr_t,
vaddr_t, vm_prot_t, boolean_t));
struct vmspace *uvmspace_alloc __P((vaddr_t, vaddr_t,
boolean_t));
void uvmspace_init __P((struct vmspace *, struct pmap *,
vaddr_t, vaddr_t, boolean_t));
void uvmspace_exec __P((struct proc *));
struct vmspace *uvmspace_fork __P((struct vmspace *));
void uvmspace_free __P((struct vmspace *));
void uvmspace_share __P((struct proc *, struct proc *));
void uvmspace_unshare __P((struct proc *));
/* uvm_meter.c */
void uvm_meter __P((void));
int uvm_sysctl __P((int *, u_int, void *, size_t *,
void *, size_t, struct proc *));
/* uvm_mmap.c */
int uvm_mmap __P((vm_map_t, vaddr_t *, vsize_t,
vm_prot_t, vm_prot_t, int,
caddr_t, voff_t, vsize_t));
/* uvm_page.c */
struct vm_page *uvm_pagealloc_strat __P((struct uvm_object *,
voff_t, struct vm_anon *, int, int, int));
#define uvm_pagealloc(obj, off, anon, flags) \
uvm_pagealloc_strat((obj), (off), (anon), (flags), \
UVM_PGA_STRAT_NORMAL, 0)
void uvm_pagerealloc __P((struct vm_page *,
struct uvm_object *, voff_t));
/* Actually, uvm_page_physload takes PF#s which need their own type */
void uvm_page_physload __P((paddr_t, paddr_t,
paddr_t, paddr_t, int));
void uvm_setpagesize __P((void));
/* uvm_pdaemon.c */
void uvm_pageout __P((void *));
/* uvm_pglist.c */
int uvm_pglistalloc __P((psize_t, paddr_t,
paddr_t, paddr_t, paddr_t,
struct pglist *, int, int));
void uvm_pglistfree __P((struct pglist *));
/* uvm_swap.c */
void uvm_swap_init __P((void));
/* uvm_unix.c */
int uvm_coredump __P((struct proc *, struct vnode *,
struct ucred *, struct core *));
int uvm_grow __P((struct proc *, vaddr_t));
/* should only be needed if COMPAT_NETBSD32 is defined */
struct core32;
int uvm_coredump32 __P((struct proc *, struct vnode *,
struct ucred *, struct core32 *));
/* uvm_user.c */
int uvm_deallocate __P((vm_map_t, vaddr_t, vsize_t));
/* uvm_vnode.c */
void uvm_vnp_setsize __P((struct vnode *, voff_t));
void uvm_vnp_sync __P((struct mount *));
void uvm_vnp_terminate __P((struct vnode *));
/* terminate a uvm/uvn object */
boolean_t uvm_vnp_uncache __P((struct vnode *));
struct uvm_object *uvn_attach __P((void *, vm_prot_t));
/* kern_malloc.c */
void kmeminit_nkmempages __P((void));
void kmeminit __P((void));
extern int nkmempages;
#endif /* _KERNEL */
#endif /* _UVM_UVM_EXTERN_H_ */
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