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("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/sysctl.h> 34 #include <vm/vm.h> 35 #include <vm/vm_param.h> 36 #include <vm/pmap.h> 37 #include <vm/vm_page.h> 38 #include <vm/vm_phys.h> 39 #include <vm/vm_dumpset.h> 40 #include <vm/uma.h> 41 #include <vm/uma_int.h> 42 #include <machine/md_var.h> 43 44 static int hw_uma_mdpages; 45 SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0, 46 "UMA MD pages in use"); 47 48 void * 49 uma_small_alloc(uma_zone_t zone, vm_size_t bytes, int domain, u_int8_t *flags, 50 int wait) 51 { 52 void *va; 53 vm_paddr_t pa; 54 vm_page_t m; 55 56 *flags = UMA_SLAB_PRIV; 57 58 m = vm_page_alloc_noobj_domain(domain, malloc2vm_flags(wait) | 59 VM_ALLOC_WIRED); 60 if (m == NULL) 61 return (NULL); 62 63 pa = VM_PAGE_TO_PHYS(m); 64 #ifdef __powerpc64__ 65 if ((wait & M_NODUMP) == 0) 66 dump_add_page(pa); 67 #endif 68 69 if (!hw_direct_map) { 70 pmap_kenter(pa, pa); 71 va = (void *)(vm_offset_t)pa; 72 } else { 73 va = (void *)(vm_offset_t)PHYS_TO_DMAP(pa); 74 } 75 atomic_add_int(&hw_uma_mdpages, 1); 76 77 return (va); 78 } 79 80 void 81 uma_small_free(void *mem, vm_size_t size, u_int8_t flags) 82 { 83 vm_page_t m; 84 85 if (hw_direct_map) 86 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)mem)); 87 else { 88 m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)mem)); 89 pmap_kremove((vm_offset_t)mem); 90 } 91 92 KASSERT(m != NULL, 93 ("Freeing UMA block at %p with no associated page", mem)); 94 #ifdef __powerpc64__ 95 dump_drop_page(VM_PAGE_TO_PHYS(m)); 96 #endif 97 vm_page_unwire_noq(m); 98 vm_page_free(m); 99 atomic_subtract_int(&hw_uma_mdpages, 1); 100 } 101