85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*-
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* Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pageout.h>
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#include <vm/uma.h>
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#include <vm/uma_int.h>
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#include <machine/md_var.h>
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#include <machine/vmparam.h>
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void *
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uma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait)
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{
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vm_page_t m;
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vm_paddr_t pa;
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void *va;
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int pflags;
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*flags = UMA_SLAB_PRIV;
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pflags = malloc2vm_flags(wait) | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED;
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for (;;) {
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m = vm_page_alloc(NULL, 0, pflags);
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if (m == NULL) {
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if (wait & M_NOWAIT)
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return (NULL);
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else
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VM_WAIT;
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} else
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break;
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}
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pa = m->phys_addr;
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if ((wait & M_NODUMP) == 0)
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dump_add_page(pa);
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va = (void *)PHYS_TO_DMAP(pa);
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if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
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pagezero(va);
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return (va);
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}
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void
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uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
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{
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vm_page_t m;
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vm_paddr_t pa;
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pa = DMAP_TO_PHYS((vm_offset_t)mem);
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dump_drop_page(pa);
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m = PHYS_TO_VM_PAGE(pa);
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m->wire_count--;
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vm_page_free(m);
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atomic_subtract_int(&vm_cnt.v_wire_count, 1);
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}
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