uma_machdep.c

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    1 /*-
    2  * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
    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  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.0/sys/mips/mips/uma_machdep.c 216315 2010-12-09 06:34:28Z jchandra $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/lock.h>
   32 #include <sys/mutex.h>
   33 #include <sys/systm.h>
   34 #include <vm/vm.h>
   35 #include <vm/vm_page.h>
   36 #include <vm/vm_pageout.h>
   37 #include <vm/uma.h>
   38 #include <vm/uma_int.h>
   39 #include <machine/md_var.h>
   40 #include <machine/vmparam.h>
   41 
   42 void *
   43 uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
   44 {
   45         static vm_pindex_t color;
   46         vm_paddr_t pa;
   47         vm_page_t m;
   48         int pflags;
   49         void *va;
   50 
   51         *flags = UMA_SLAB_PRIV;
   52 
   53         if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
   54                 pflags = VM_ALLOC_INTERRUPT;
   55         else
   56                 pflags = VM_ALLOC_SYSTEM;
   57 
   58         for (;;) {
   59                 m = pmap_alloc_direct_page(color++, pflags);
   60                 if (m == NULL) {
   61                         if (wait & M_NOWAIT)
   62                                 return (NULL);
   63                         else
   64                                 pmap_grow_direct_page_cache();
   65                 } else
   66                         break;
   67         }
   68 
   69         pa = VM_PAGE_TO_PHYS(m);
   70         va = (void *)MIPS_PHYS_TO_DIRECT(pa);
   71         if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
   72                 bzero(va, PAGE_SIZE);
   73         return (va);
   74 }
   75 
   76 void
   77 uma_small_free(void *mem, int size, u_int8_t flags)
   78 {
   79         vm_page_t m;
   80         vm_paddr_t pa;
   81 
   82         pa = MIPS_DIRECT_TO_PHYS((vm_offset_t)mem);
   83         m = PHYS_TO_VM_PAGE(pa);
   84         m->wire_count--;
   85         vm_page_free(m);
   86         atomic_subtract_int(&cnt.v_wire_count, 1);
   87 }

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

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sys/mips/mips/uma_machdep.c