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/mips/mips/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: stable/12/sys/mips/mips/uma_machdep.c 329636 2018-02-20 10:13:13Z kib $");
   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_paddr_t pa;
   51         vm_page_t m;
   52         int pflags;
   53         void *va;
   54 
   55         *flags = UMA_SLAB_PRIV;
   56         pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED;
   57 #ifndef __mips_n64
   58         pflags &= ~(VM_ALLOC_WAITOK | VM_ALLOC_WAITFAIL);
   59         pflags |= VM_ALLOC_NOWAIT;
   60 #endif
   61 
   62         for (;;) {
   63                 m = vm_page_alloc_freelist_domain(domain, VM_FREELIST_DIRECT,
   64                     pflags);
   65 #ifndef __mips_n64
   66                 if (m == NULL && vm_page_reclaim_contig(pflags, 1,
   67                     0, MIPS_KSEG0_LARGEST_PHYS, PAGE_SIZE, 0))
   68                         continue;
   69 #endif
   70                 if (m != NULL)
   71                         break;
   72                 if ((wait & M_NOWAIT) != 0)
   73                         return (NULL);
   74                 vm_wait(NULL);
   75         }
   76 
   77         pa = VM_PAGE_TO_PHYS(m);
   78         if ((wait & M_NODUMP) == 0)
   79                 dump_add_page(pa);
   80         va = (void *)MIPS_PHYS_TO_DIRECT(pa);
   81         if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
   82                 bzero(va, PAGE_SIZE);
   83         return (va);
   84 }
   85 
   86 void
   87 uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
   88 {
   89         vm_page_t m;
   90         vm_paddr_t pa;
   91 
   92         pa = MIPS_DIRECT_TO_PHYS((vm_offset_t)mem);
   93         dump_drop_page(pa);
   94         m = PHYS_TO_VM_PAGE(pa);
   95         vm_page_unwire_noq(m);
   96         vm_page_free(m);
   97 }

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