uma_machdep.c revision 327785
1/*- 2 * Copyright (c) 2003 The FreeBSD Project 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 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/powerpc/powerpc/uma_machdep.c 327785 2018-01-10 20:39:26Z markj $"); 29 30#include <sys/param.h> 31#include <sys/kernel.h> 32#include <sys/lock.h> 33#include <sys/malloc.h> 34#include <sys/mutex.h> 35#include <sys/systm.h> 36#include <sys/sysctl.h> 37#include <vm/vm.h> 38#include <vm/vm_page.h> 39#include <vm/vm_kern.h> 40#include <vm/vm_pageout.h> 41#include <vm/vm_extern.h> 42#include <vm/uma.h> 43#include <vm/uma.h> 44#include <vm/uma_int.h> 45#include <machine/md_var.h> 46#include <machine/vmparam.h> 47 48static int hw_uma_mdpages; 49SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0, 50 "UMA MD pages in use"); 51 52void * 53uma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait) 54{ 55 void *va; 56 vm_paddr_t pa; 57 vm_page_t m; 58 59 *flags = UMA_SLAB_PRIV; 60 61 m = vm_page_alloc(NULL, 0, 62 malloc2vm_flags(wait) | VM_ALLOC_WIRED | VM_ALLOC_NOOBJ); 63 if (m == NULL) 64 return (NULL); 65 66 pa = VM_PAGE_TO_PHYS(m); 67 68 /* On book-e sizeof(void *) < sizeof(vm_paddr_t) */ 69 if ((vm_offset_t)pa != pa) 70 return (NULL); 71 72 va = (void *)(vm_offset_t)pa; 73 74 if (!hw_direct_map) 75 pmap_kenter((vm_offset_t)va, VM_PAGE_TO_PHYS(m)); 76 77 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0) 78 bzero(va, PAGE_SIZE); 79 atomic_add_int(&hw_uma_mdpages, 1); 80 81 return (va); 82} 83 84void 85uma_small_free(void *mem, vm_size_t size, u_int8_t flags) 86{ 87 vm_page_t m; 88 89 if (!hw_direct_map) 90 pmap_remove(kernel_pmap,(vm_offset_t)mem, 91 (vm_offset_t)mem + PAGE_SIZE); 92 93 m = PHYS_TO_VM_PAGE((vm_offset_t)mem); 94 m->wire_count--; 95 vm_page_free(m); 96 atomic_subtract_int(&vm_cnt.v_wire_count, 1); 97 atomic_subtract_int(&hw_uma_mdpages, 1); 98} 99