507b10b48c
the initialization parameters of some zones in VM map. This contains only optimizations and not bugfixes.
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
|
|
/*
|
|
* Copyright (c) 1997 John S. Dyson
|
|
* 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 immediately at the beginning of the file, without modification,
|
|
* 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. Absolutely no warranty of function or purpose is made by the author
|
|
* John S. Dyson.
|
|
* 4. This work was done expressly for inclusion into FreeBSD. Other use
|
|
* is allowed if this notation is included.
|
|
* 5. Modifications may be freely made to this file if the above conditions
|
|
* are met.
|
|
*
|
|
* $Id: vm_zone.h,v 1.2 1997/08/05 22:24:31 dyson Exp $
|
|
*/
|
|
|
|
#if !defined(_SYS_ZONE_H)
|
|
|
|
#define _SYS_ZONE_H
|
|
|
|
#define ZONE_INTERRUPT 1 /* Use this if you need to allocate at int time */
|
|
#define ZONE_BOOT 16 /* This is an internal flag used by zbootinit */
|
|
|
|
#include <machine/param.h>
|
|
#include <sys/lock.h>
|
|
|
|
|
|
typedef struct vm_zone {
|
|
struct simplelock zlock; /* lock for data structure */
|
|
void *zitems; /* linked list of items */
|
|
int zfreecnt; /* free entries */
|
|
int zfreemin; /* minimum number of free entries */
|
|
vm_offset_t zkva; /* Base kva of zone */
|
|
int zpagecount; /* Total # of allocated pages */
|
|
int zpagemax; /* Max address space */
|
|
int zmax; /* Max number of entries allocated */
|
|
int ztotal; /* Total entries allocated now */
|
|
int zsize; /* size of each entry */
|
|
int zalloc; /* hint for # of pages to alloc */
|
|
int zflags; /* flags for zone */
|
|
int zallocflag; /* flag for allocation */
|
|
struct vm_object *zobj; /* object to hold zone */
|
|
char *zname; /* name for diags */
|
|
struct vm_zone *znext; /* list of zones for sysctl */
|
|
} *vm_zone_t;
|
|
|
|
|
|
vm_zone_t zinit(char *name, int size, int nentries, int flags, int zalloc);
|
|
int zinitna(vm_zone_t z, struct vm_object *obj, char *name, int size,
|
|
int nentries, int flags, int zalloc);
|
|
static void * zalloc(vm_zone_t z);
|
|
static void zfree(vm_zone_t z, void *item);
|
|
void * zalloci(vm_zone_t z) __attribute__((regparm(1)));
|
|
void zfreei(vm_zone_t z, void *item) __attribute__((regparm(2)));
|
|
void zbootinit(vm_zone_t z, char *name, int size, void *item, int nitems) ;
|
|
void * _zget(vm_zone_t z) __attribute__((regparm(1)));
|
|
|
|
/*
|
|
* void *zalloc(vm_zone_t zone) --
|
|
* Returns an item from a specified zone.
|
|
*
|
|
* void zfree(vm_zone_t zone, void *item) --
|
|
* Frees an item back to a specified zone.
|
|
*/
|
|
static __inline__ void *
|
|
_zalloc(vm_zone_t z) {
|
|
void *item;
|
|
|
|
if (z->zfreecnt <= z->zfreemin) {
|
|
return _zget(z);
|
|
}
|
|
|
|
item = z->zitems;
|
|
z->zitems = *(void **) item;
|
|
z->zfreecnt--;
|
|
return item;
|
|
}
|
|
|
|
static __inline__ void
|
|
_zfree(vm_zone_t z, void *item) {
|
|
* (void **) item = z->zitems;
|
|
z->zitems = item;
|
|
z->zfreecnt++;
|
|
}
|
|
|
|
static __inline__ void *
|
|
zalloc(vm_zone_t z) {
|
|
#if NCPU > 1
|
|
return zalloci(z);
|
|
#else
|
|
return _zalloc(z);
|
|
#endif
|
|
}
|
|
|
|
static __inline__ void
|
|
zfree(vm_zone_t z, void *item) {
|
|
#if NCPU > 1
|
|
zfreei(z, item);
|
|
#else
|
|
_zfree(z, item);
|
|
#endif
|
|
}
|
|
|
|
#endif
|