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


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FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/uma_machdep.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/12.0/sys/amd64/amd64/uma_machdep.c 329023 2018-02-08 19:28:51Z markj $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/lock.h>
   34 #include <sys/malloc.h>
   35 #include <sys/mutex.h>
   36 #include <sys/systm.h>
   37 #include <sys/vmmeter.h>
   38 #include <vm/vm.h>
   39 #include <vm/vm_page.h>
   40 #include <vm/vm_pageout.h>
   41 #include <vm/uma.h>
   42 #include <vm/uma_int.h>
   43 #include <machine/md_var.h>
   44 #include <machine/vmparam.h>
   45 
   46 void *
   47 uma_small_alloc(uma_zone_t zone, vm_size_t bytes, int domain, u_int8_t *flags,
   48     int wait)
   49 {
   50         vm_page_t m;
   51         vm_paddr_t pa;
   52         void *va;
   53 
   54         *flags = UMA_SLAB_PRIV;
   55         m = vm_page_alloc_domain(NULL, 0, domain,
   56             malloc2vm_flags(wait) | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED);
   57         if (m == NULL)
   58                 return (NULL);
   59         pa = m->phys_addr;
   60         if ((wait & M_NODUMP) == 0)
   61                 dump_add_page(pa);
   62         va = (void *)PHYS_TO_DMAP(pa);
   63         if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
   64                 pagezero(va);
   65         return (va);
   66 }
   67 
   68 void
   69 uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
   70 {
   71         vm_page_t m;
   72         vm_paddr_t pa;
   73 
   74         pa = DMAP_TO_PHYS((vm_offset_t)mem);
   75         dump_drop_page(pa);
   76         m = PHYS_TO_VM_PAGE(pa);
   77         vm_page_unwire_noq(m);
   78         vm_page_free(m);
   79 }

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