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