The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/uma_machdep.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2003 The FreeBSD Project
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/7.4/sys/powerpc/powerpc/uma_machdep.c 172189 2007-09-15 18:47:02Z alc $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/lock.h>
   33 #include <sys/mutex.h>
   34 #include <sys/systm.h>
   35 #include <sys/sysctl.h>
   36 #include <vm/vm.h>
   37 #include <vm/vm_page.h>
   38 #include <vm/vm_pageout.h>
   39 #include <vm/uma.h>
   40 #include <vm/uma_int.h>
   41 #include <machine/vmparam.h>
   42 
   43 static int hw_uma_mdpages;
   44 SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0,
   45            "UMA MD pages in use");
   46 
   47 void *
   48 uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
   49 {
   50         static vm_pindex_t color;
   51         void *va;
   52         vm_page_t m;
   53         int pflags;
   54 
   55         *flags = UMA_SLAB_PRIV;
   56         if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
   57                 pflags = VM_ALLOC_INTERRUPT | VM_ALLOC_WIRED;
   58         else
   59                 pflags = VM_ALLOC_SYSTEM | VM_ALLOC_WIRED;
   60         if (wait & M_ZERO)
   61                 pflags |= VM_ALLOC_ZERO;
   62 
   63         for (;;) {
   64                 m = vm_page_alloc(NULL, color++, pflags | VM_ALLOC_NOOBJ);
   65                 if (m == NULL) {
   66                         if (wait & M_NOWAIT)
   67                                 return (NULL);
   68                         VM_WAIT;
   69                 } else
   70                         break;
   71         }
   72 
   73         va = (void *) VM_PAGE_TO_PHYS(m);
   74         if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
   75                 bzero(va, PAGE_SIZE);
   76         atomic_add_int(&hw_uma_mdpages, 1);
   77 
   78         return (va);
   79 }
   80 
   81 void
   82 uma_small_free(void *mem, int size, u_int8_t flags)
   83 {
   84         vm_page_t m;
   85 
   86         m = PHYS_TO_VM_PAGE((u_int32_t)mem);
   87         m->wire_count--;
   88         vm_page_free(m);
   89         atomic_subtract_int(&cnt.v_wire_count, 1);
   90         atomic_subtract_int(&hw_uma_mdpages, 1);
   91 }

Cache object: aed6d91c341b968e9e67774de0b0d91b


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.