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/param.h> 28 #include <sys/systm.h> 29 #include <sys/malloc.h> 30 #include <sys/sysctl.h> 31 #include <vm/vm.h> 32 #include <vm/vm_param.h> 33 #include <vm/pmap.h> 34 #include <vm/vm_page.h> 35 #include <vm/vm_phys.h> 36 #include <vm/vm_dumpset.h> 37 #include <vm/uma.h> 38 #include <vm/uma_int.h> 39 #include <machine/md_var.h> 40 41 static int hw_uma_mdpages; 42 SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0, 43 "UMA MD pages in use"); 44 45 void * 46 uma_small_alloc(uma_zone_t zone, vm_size_t bytes, int domain, u_int8_t *flags, 47 int wait) 48 { 49 void *va; 50 vm_paddr_t pa; 51 vm_page_t m; 52 53 *flags = UMA_SLAB_PRIV; 54 55 m = vm_page_alloc_noobj_domain(domain, malloc2vm_flags(wait) | 56 VM_ALLOC_WIRED); 57 if (m == NULL) 58 return (NULL); 59 60 pa = VM_PAGE_TO_PHYS(m); 61 #ifdef __powerpc64__ 62 if ((wait & M_NODUMP) == 0) 63 dump_add_page(pa); 64 #endif 65 66 if (!hw_direct_map) { 67 pmap_kenter(pa, pa); 68 va = (void *)(vm_offset_t)pa; 69 } else { 70 va = (void *)(vm_offset_t)PHYS_TO_DMAP(pa); 71 } 72 atomic_add_int(&hw_uma_mdpages, 1); 73 74 return (va); 75 } 76 77 void 78 uma_small_free(void *mem, vm_size_t size, u_int8_t flags) 79 { 80 vm_page_t m; 81 82 if (hw_direct_map) 83 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)mem)); 84 else { 85 m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)mem)); 86 pmap_kremove((vm_offset_t)mem); 87 } 88 89 KASSERT(m != NULL, 90 ("Freeing UMA block at %p with no associated page", mem)); 91 #ifdef __powerpc64__ 92 dump_drop_page(VM_PAGE_TO_PHYS(m)); 93 #endif 94 vm_page_unwire_noq(m); 95 vm_page_free(m); 96 atomic_subtract_int(&hw_uma_mdpages, 1); 97 } 98