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 1.13 2003/11/03 17:11:22 dillon Exp $ 36 */ 37 38 #ifndef _SYS_MALLOC_H_ 39 #define _SYS_MALLOC_H_ 40 41 #ifndef _MACHINE_PARAM_H_ 42 #include <machine/param.h> /* for SMP_MAXCPU */ 43 #endif 44 45 #ifdef _KERNEL 46 47 #ifndef _MACHINE_VMPARAM_H_ 48 #include <machine/vmparam.h> /* for VM_MIN_KERNEL_ADDRESS */ 49 #endif 50 51 #define splmem splhigh 52 53 #endif 54 55 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 56 57 /* 58 * flags to malloc. 59 */ 60 #define M_NOWAIT 0x0001 /* do not block */ 61 #define M_WAITOK 0x0002 /* wait for resources */ 62 #define M_ZERO 0x0100 /* bzero() the allocation */ 63 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */ 64 #define M_NULLOK 0x0400 /* ok to return NULL in M_WAITOK case */ 65 #define M_PASSIVE_ZERO 0x0800 /* (internal to the slab code only) */ 66 67 #define M_MAGIC 877983977 /* time when first defined :-) */ 68 69 /* 70 * The malloc tracking structure. Note that per-cpu entries must be 71 * aggregated for accurate statistics, they do not actually break the 72 * stats down by cpu (e.g. the cpu freeing memory will subtract from 73 * its slot, not the originating cpu's slot). 74 * 75 * SMP_MAXCPU is used so modules which use malloc remain compatible 76 * between UP and SMP. 77 */ 78 struct malloc_type { 79 struct malloc_type *ks_next; /* next in list */ 80 long ks_memuse[SMP_MAXCPU]; /* total memory held in bytes */ 81 long ks_loosememuse; /* (inaccurate) aggregate memuse */ 82 long ks_limit; /* most that are allowed to exist */ 83 long ks_size; /* sizes of this thing that are allocated */ 84 long ks_inuse[SMP_MAXCPU]; /* # of allocs currently in use */ 85 int64_t ks_calls; /* total packets of this type ever allocated */ 86 long ks_maxused; /* maximum number ever used */ 87 u_long ks_magic; /* if it's not magic, don't touch it */ 88 const char *ks_shortdesc; /* short description */ 89 u_short ks_limblocks; /* number of times blocked for hitting limit */ 90 u_short ks_mapblocks; /* number of times blocked for kernel map */ 91 long ks_reserved[4]; /* future use (module compatibility) */ 92 }; 93 94 #endif 95 96 #ifdef _KERNEL 97 #define MALLOC_DEFINE(type, shortdesc, longdesc) \ 98 struct malloc_type type[1] = { \ 99 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ 100 }; \ 101 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \ 102 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type) 103 104 #define MALLOC_DECLARE(type) \ 105 extern struct malloc_type type[1] 106 107 MALLOC_DECLARE(M_CACHE); 108 MALLOC_DECLARE(M_DEVBUF); 109 MALLOC_DECLARE(M_TEMP); 110 111 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ 112 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ 113 #endif /* _KERNEL */ 114 115 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 116 117 /* 118 * Array of descriptors that describe the contents of each page 119 */ 120 struct kmemusage { 121 short ku_cpu; /* cpu index */ 122 union { 123 u_short freecnt;/* for small allocations, free pieces in page */ 124 u_short pagecnt;/* for large allocations, pages alloced */ 125 } ku_un; 126 }; 127 #define ku_freecnt ku_un.freecnt 128 #define ku_pagecnt ku_un.pagecnt 129 130 /* 131 * Set of buckets for each size of memory block that is retained 132 */ 133 struct kmembuckets { 134 caddr_t kb_next; /* list of free blocks */ 135 caddr_t kb_last; /* last free block */ 136 int64_t kb_calls; /* total calls to allocate this size */ 137 long kb_total; /* total number of blocks allocated */ 138 long kb_elmpercl; /* # of elements in this sized allocation */ 139 long kb_totalfree; /* # of free elements in this bucket */ 140 long kb_highwat; /* high water mark */ 141 long kb_couldfree; /* over high water mark and could free */ 142 }; 143 144 #define MINALLOCSIZE (1 << MINBUCKET) 145 #define BUCKETINDX(size) \ 146 ((size) <= (MINALLOCSIZE * 128) \ 147 ? (size) <= (MINALLOCSIZE * 8) \ 148 ? (size) <= (MINALLOCSIZE * 2) \ 149 ? (size) <= (MINALLOCSIZE * 1) \ 150 ? (MINBUCKET + 0) \ 151 : (MINBUCKET + 1) \ 152 : (size) <= (MINALLOCSIZE * 4) \ 153 ? (MINBUCKET + 2) \ 154 : (MINBUCKET + 3) \ 155 : (size) <= (MINALLOCSIZE* 32) \ 156 ? (size) <= (MINALLOCSIZE * 16) \ 157 ? (MINBUCKET + 4) \ 158 : (MINBUCKET + 5) \ 159 : (size) <= (MINALLOCSIZE * 64) \ 160 ? (MINBUCKET + 6) \ 161 : (MINBUCKET + 7) \ 162 : (size) <= (MINALLOCSIZE * 2048) \ 163 ? (size) <= (MINALLOCSIZE * 512) \ 164 ? (size) <= (MINALLOCSIZE * 256) \ 165 ? (MINBUCKET + 8) \ 166 : (MINBUCKET + 9) \ 167 : (size) <= (MINALLOCSIZE * 1024) \ 168 ? (MINBUCKET + 10) \ 169 : (MINBUCKET + 11) \ 170 : (size) <= (MINALLOCSIZE * 8192) \ 171 ? (size) <= (MINALLOCSIZE * 4096) \ 172 ? (MINBUCKET + 12) \ 173 : (MINBUCKET + 13) \ 174 : (size) <= (MINALLOCSIZE * 16384) \ 175 ? (MINBUCKET + 14) \ 176 : (MINBUCKET + 15)) 177 178 #endif 179 180 #ifdef _KERNEL 181 182 /* 183 * Turn virtual addresses into kmem map indices 184 */ 185 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - (caddr_t)VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT]) 186 187 /* 188 * Deprecated macro versions of not-quite-malloc() and free(). 189 */ 190 #define MALLOC(space, cast, size, type, flags) \ 191 (space) = (cast)malloc((u_long)(size), (type), (flags)) 192 #define FREE(addr, type) free((addr), (type)) 193 194 /* 195 * XXX this should be declared in <sys/uio.h>, but that tends to fail 196 * because <sys/uio.h> is included in a header before the source file 197 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined. 198 */ 199 MALLOC_DECLARE(M_IOV); 200 201 /* XXX struct malloc_type is unused for contig*(). */ 202 void contigfree (void *addr, unsigned long size, 203 struct malloc_type *type); 204 void *contigmalloc (unsigned long size, struct malloc_type *type, 205 int flags, vm_paddr_t low, vm_paddr_t high, 206 unsigned long alignment, unsigned long boundary); 207 void free (void *addr, struct malloc_type *type); 208 void *malloc (unsigned long size, struct malloc_type *type, int flags); 209 void malloc_init (void *); 210 void malloc_uninit (void *); 211 void *realloc (void *addr, unsigned long size, 212 struct malloc_type *type, int flags); 213 void *reallocf (void *addr, unsigned long size, 214 struct malloc_type *type, int flags); 215 216 #endif /* _KERNEL */ 217 218 #endif /* !_SYS_MALLOC_H_ */ 219