1 /* 2 * Copyright (c) 1987, 1993 3 * The Regents of the University of California. 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)malloc.h 8.5 (Berkeley) 5/3/95 34 * $FreeBSD: src/sys/sys/malloc.h,v 1.48.2.2 2002/03/16 02:19:16 archie Exp $ 35 * $DragonFly: src/sys/sys/malloc.h,v 1.4 2003/07/28 05:03:25 hmp Exp $ 36 */ 37 38 #ifndef _SYS_MALLOC_H_ 39 #define _SYS_MALLOC_H_ 40 41 #define splmem splhigh 42 43 /* 44 * flags to malloc. 45 */ 46 #define M_NOWAIT 0x0001 /* do not block */ 47 #define M_WAITOK 0x0002 /* wait for resources */ 48 #define M_ZERO 0x0100 /* bzero() the allocation */ 49 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */ 50 51 #define M_MAGIC 877983977 /* time when first defined :-) */ 52 53 struct malloc_type { 54 struct malloc_type *ks_next; /* next in list */ 55 long ks_memuse; /* total memory held in bytes */ 56 long ks_limit; /* most that are allowed to exist */ 57 long ks_size; /* sizes of this thing that are allocated */ 58 long ks_inuse; /* # of packets of this type currently in use */ 59 int64_t ks_calls; /* total packets of this type ever allocated */ 60 long ks_maxused; /* maximum number ever used */ 61 u_long ks_magic; /* if it's not magic, don't touch it */ 62 const char *ks_shortdesc; /* short description */ 63 u_short ks_limblocks; /* number of times blocked for hitting limit */ 64 u_short ks_mapblocks; /* number of times blocked for kernel map */ 65 }; 66 67 #ifdef _KERNEL 68 #define MALLOC_DEFINE(type, shortdesc, longdesc) \ 69 struct malloc_type type[1] = { \ 70 { NULL, 0, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ 71 }; \ 72 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \ 73 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type) 74 75 #define MALLOC_DECLARE(type) \ 76 extern struct malloc_type type[1] 77 78 MALLOC_DECLARE(M_CACHE); 79 MALLOC_DECLARE(M_DEVBUF); 80 MALLOC_DECLARE(M_TEMP); 81 82 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ 83 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ 84 #endif /* _KERNEL */ 85 86 /* 87 * Array of descriptors that describe the contents of each page 88 */ 89 struct kmemusage { 90 short ku_indx; /* bucket index */ 91 union { 92 u_short freecnt;/* for small allocations, free pieces in page */ 93 u_short pagecnt;/* for large allocations, pages alloced */ 94 } ku_un; 95 }; 96 #define ku_freecnt ku_un.freecnt 97 #define ku_pagecnt ku_un.pagecnt 98 99 /* 100 * Set of buckets for each size of memory block that is retained 101 */ 102 struct kmembuckets { 103 caddr_t kb_next; /* list of free blocks */ 104 caddr_t kb_last; /* last free block */ 105 int64_t kb_calls; /* total calls to allocate this size */ 106 long kb_total; /* total number of blocks allocated */ 107 long kb_elmpercl; /* # of elements in this sized allocation */ 108 long kb_totalfree; /* # of free elements in this bucket */ 109 long kb_highwat; /* high water mark */ 110 long kb_couldfree; /* over high water mark and could free */ 111 }; 112 113 #ifdef _KERNEL 114 #define MINALLOCSIZE (1 << MINBUCKET) 115 #define BUCKETINDX(size) \ 116 ((size) <= (MINALLOCSIZE * 128) \ 117 ? (size) <= (MINALLOCSIZE * 8) \ 118 ? (size) <= (MINALLOCSIZE * 2) \ 119 ? (size) <= (MINALLOCSIZE * 1) \ 120 ? (MINBUCKET + 0) \ 121 : (MINBUCKET + 1) \ 122 : (size) <= (MINALLOCSIZE * 4) \ 123 ? (MINBUCKET + 2) \ 124 : (MINBUCKET + 3) \ 125 : (size) <= (MINALLOCSIZE* 32) \ 126 ? (size) <= (MINALLOCSIZE * 16) \ 127 ? (MINBUCKET + 4) \ 128 : (MINBUCKET + 5) \ 129 : (size) <= (MINALLOCSIZE * 64) \ 130 ? (MINBUCKET + 6) \ 131 : (MINBUCKET + 7) \ 132 : (size) <= (MINALLOCSIZE * 2048) \ 133 ? (size) <= (MINALLOCSIZE * 512) \ 134 ? (size) <= (MINALLOCSIZE * 256) \ 135 ? (MINBUCKET + 8) \ 136 : (MINBUCKET + 9) \ 137 : (size) <= (MINALLOCSIZE * 1024) \ 138 ? (MINBUCKET + 10) \ 139 : (MINBUCKET + 11) \ 140 : (size) <= (MINALLOCSIZE * 8192) \ 141 ? (size) <= (MINALLOCSIZE * 4096) \ 142 ? (MINBUCKET + 12) \ 143 : (MINBUCKET + 13) \ 144 : (size) <= (MINALLOCSIZE * 16384) \ 145 ? (MINBUCKET + 14) \ 146 : (MINBUCKET + 15)) 147 148 /* 149 * Turn virtual addresses into kmem map indices 150 */ 151 #define kmemxtob(alloc) (kmembase + (alloc) * PAGE_SIZE) 152 #define btokmemx(addr) (((caddr_t)(addr) - kmembase) / PAGE_SIZE) 153 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT]) 154 155 /* 156 * Deprecated macro versions of not-quite-malloc() and free(). 157 */ 158 #define MALLOC(space, cast, size, type, flags) \ 159 (space) = (cast)malloc((u_long)(size), (type), (flags)) 160 #define FREE(addr, type) free((addr), (type)) 161 162 /* 163 * XXX this should be declared in <sys/uio.h>, but that tends to fail 164 * because <sys/uio.h> is included in a header before the source file 165 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined. 166 */ 167 MALLOC_DECLARE(M_IOV); 168 169 /* XXX struct malloc_type is unused for contig*(). */ 170 void contigfree __P((void *addr, unsigned long size, 171 struct malloc_type *type)); 172 void *contigmalloc __P((unsigned long size, struct malloc_type *type, 173 int flags, unsigned long low, unsigned long high, 174 unsigned long alignment, unsigned long boundary)); 175 void free __P((void *addr, struct malloc_type *type)); 176 void *malloc __P((unsigned long size, struct malloc_type *type, int flags)); 177 void malloc_init __P((void *)); 178 void malloc_uninit __P((void *)); 179 void *realloc __P((void *addr, unsigned long size, 180 struct malloc_type *type, int flags)); 181 void *reallocf __P((void *addr, unsigned long size, 182 struct malloc_type *type, int flags)); 183 #endif /* _KERNEL */ 184 185 #endif /* !_SYS_MALLOC_H_ */ 186