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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2017, Joyent, Inc. All rights reserved.
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#ifndef _SYS_VMSYSTM_H
#define _SYS_VMSYSTM_H
#include <sys/proc.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Miscellaneous virtual memory subsystem variables and structures.
*/
#ifdef _KERNEL
extern pgcnt_t freemem; /* remaining blocks of free memory */
extern pgcnt_t avefree; /* 5 sec moving average of free memory */
extern pgcnt_t avefree30; /* 30 sec moving average of free memory */
extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */
extern pgcnt_t nscan; /* number of scans in last second */
extern pgcnt_t desscan; /* desired pages scanned per second */
extern pgcnt_t slowscan;
extern pgcnt_t fastscan;
extern pgcnt_t pushes; /* number of pages pushed to swap device */
extern uint64_t low_mem_scan; /* num times page scan due to low memory */
extern uint64_t zone_cap_scan; /* num times page scan due to zone cap */
extern uint64_t n_throttle; /* num times page create throttled */
/* writable copies of tunables */
extern pgcnt_t maxpgio; /* max paging i/o per sec before start swaps */
extern pgcnt_t lotsfree; /* max free before clock freezes */
extern pgcnt_t desfree; /* minimum free pages before swapping begins */
extern pgcnt_t minfree; /* no of pages to try to keep free via daemon */
extern pgcnt_t needfree; /* no of pages currently being waited for */
extern pgcnt_t throttlefree; /* point at which we block PG_WAIT calls */
extern pgcnt_t pageout_reserve; /* point at which we deny non-PG_WAIT calls */
extern pgcnt_t pages_before_pager; /* XXX */
/*
* TRUE if the pageout daemon, fsflush daemon or the scheduler. These
* processes can't sleep while trying to free up memory since a deadlock
* will occur if they do sleep.
*/
#define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \
ttoproc(curthread) == proc_fsflush || \
ttoproc(curthread) == proc_sched)
/* insure non-zero */
#define nz(x) ((x) != 0 ? (x) : 1)
/*
* Flags passed by the swapper to swapout routines of each
* scheduling class.
*/
#define HARDSWAP 1
#define SOFTSWAP 2
/*
* Values returned by valid_usr_range()
*/
#define RANGE_OKAY (0)
#define RANGE_BADADDR (1)
#define RANGE_BADPROT (2)
/*
* map_pgsz: temporary - subject to change.
*/
#define MAPPGSZ_VA 0x01
#define MAPPGSZ_STK 0x02
#define MAPPGSZ_HEAP 0x04
#define MAPPGSZ_ISM 0x08
/*
* Flags for map_pgszcvec
*/
#define MAPPGSZC_SHM 0x01
#define MAPPGSZC_PRIVM 0x02
#define MAPPGSZC_STACK 0x04
#define MAPPGSZC_HEAP 0x08
/*
* vacalign values for choose_addr
*/
#define ADDR_NOVACALIGN 0
#define ADDR_VACALIGN 1
struct as;
struct page;
struct anon;
extern int maxslp;
extern ulong_t pginrate;
extern ulong_t pgoutrate;
extern void swapout_lwp(klwp_t *);
extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen,
int dir);
extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp,
size_t minlen, int dir, size_t align, size_t redzone, size_t off);
extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t);
extern int useracc(void *, size_t, int);
extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len,
int memcntl);
extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags,
int type, int memcntl);
extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off,
int vacalign, uint_t flags);
extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign,
uint_t flags);
extern int map_addr_vacalign_check(caddr_t, u_offset_t);
extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off,
int vacalign, caddr_t userlimit, struct proc *p, uint_t flags);
extern void vmmeter(void);
extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **,
struct anon **, size_t *, int);
extern caddr_t ppmapin(struct page *, uint_t, caddr_t);
extern void ppmapout(caddr_t);
extern int pf_is_memory(pfn_t);
extern void dcache_flushall(void);
extern void *boot_virt_alloc(void *addr, size_t size);
extern size_t exec_get_spslew(void);
extern caddr_t map_userlimit(proc_t *pp, struct as *as, int flags);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_VMSYSTM_H */
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