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/*-
* Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/amd64/amd64/uma_machdep.c 237949 2012-07-02 03:49:52Z alc $");
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/uma.h>
#include <vm/uma_int.h>
#include <machine/md_var.h>
#include <machine/vmparam.h>
void *
uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
{
vm_page_t m;
vm_paddr_t pa;
void *va;
int pflags;
*flags = UMA_SLAB_PRIV;
if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
pflags = VM_ALLOC_INTERRUPT | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED;
else
pflags = VM_ALLOC_SYSTEM | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED;
if (wait & M_ZERO)
pflags |= VM_ALLOC_ZERO;
for (;;) {
m = vm_page_alloc(NULL, 0, pflags);
if (m == NULL) {
if (wait & M_NOWAIT)
return (NULL);
else
VM_WAIT;
} else
break;
}
pa = m->phys_addr;
if ((wait & M_NODUMP) == 0)
dump_add_page(pa);
va = (void *)PHYS_TO_DMAP(pa);
if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
pagezero(va);
return (va);
}
void
uma_small_free(void *mem, int size, u_int8_t flags)
{
vm_page_t m;
vm_paddr_t pa;
pa = DMAP_TO_PHYS((vm_offset_t)mem);
dump_drop_page(pa);
m = PHYS_TO_VM_PAGE(pa);
m->wire_count--;
vm_page_free(m);
atomic_subtract_int(&cnt.v_wire_count, 1);
}