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 1.16 2003/11/30 20:13:53 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 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 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 #ifndef _MACHINE_TYPES_H_ 54 #include <machine/types.h> /* vm_paddr_t */ 55 #endif 56 57 #endif /* _KERNEL */ 58 59 /* 60 * flags to malloc. 61 */ 62 #define M_NOWAIT 0x0001 /* do not block */ 63 #define M_WAITOK 0x0002 /* wait for resources */ 64 #define M_ZERO 0x0100 /* bzero() the allocation */ 65 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */ 66 #define M_NULLOK 0x0400 /* ok to return NULL in M_WAITOK case */ 67 #define M_PASSIVE_ZERO 0x0800 /* (internal to the slab code only) */ 68 69 #define M_MAGIC 877983977 /* time when first defined :-) */ 70 71 /* 72 * The malloc tracking structure. Note that per-cpu entries must be 73 * aggregated for accurate statistics, they do not actually break the 74 * stats down by cpu (e.g. the cpu freeing memory will subtract from 75 * its slot, not the originating cpu's slot). 76 * 77 * SMP_MAXCPU is used so modules which use malloc remain compatible 78 * between UP and SMP. 79 */ 80 struct malloc_type { 81 struct malloc_type *ks_next; /* next in list */ 82 long ks_memuse[SMP_MAXCPU]; /* total memory held in bytes */ 83 long ks_loosememuse; /* (inaccurate) aggregate memuse */ 84 long ks_limit; /* most that are allowed to exist */ 85 long ks_size; /* sizes of this thing that are allocated */ 86 long ks_inuse[SMP_MAXCPU]; /* # of allocs currently in use */ 87 __int64_t ks_calls; /* total packets of this type ever allocated */ 88 long ks_maxused; /* maximum number ever used */ 89 __uint32_t ks_magic; /* if it's not magic, don't touch it */ 90 const char *ks_shortdesc; /* short description */ 91 __uint16_t ks_limblocks; /* number of times blocked for hitting limit */ 92 __uint16_t ks_mapblocks; /* number of times blocked for kernel map */ 93 long ks_reserved[4]; /* future use (module compatibility) */ 94 }; 95 96 typedef struct malloc_type *malloc_type_t; 97 98 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 99 100 #define MALLOC_DEFINE(type, shortdesc, longdesc) \ 101 struct malloc_type type[1] = { \ 102 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ 103 }; \ 104 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \ 105 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type) 106 107 #else 108 109 #define MALLOC_DEFINE(type, shortdesc, longdesc) \ 110 struct malloc_type type[1] = { \ 111 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ 112 }; 113 114 #endif 115 116 #define MALLOC_DECLARE(type) \ 117 extern struct malloc_type type[1] 118 119 #ifdef _KERNEL 120 121 MALLOC_DECLARE(M_CACHE); 122 MALLOC_DECLARE(M_DEVBUF); 123 MALLOC_DECLARE(M_TEMP); 124 125 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ 126 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ 127 128 #endif /* _KERNEL */ 129 130 /* 131 * Array of descriptors that describe the contents of each page 132 */ 133 struct kmemusage { 134 short ku_cpu; /* cpu index */ 135 union { 136 __int16_t freecnt;/* for small allocations, free pieces in page */ 137 __int16_t pagecnt;/* for large allocations, pages alloced */ 138 } ku_un; 139 }; 140 #define ku_freecnt ku_un.freecnt 141 #define ku_pagecnt ku_un.pagecnt 142 143 #ifdef _KERNEL 144 145 #define MINALLOCSIZE sizeof(void *) 146 147 /* 148 * Turn virtual addresses into kmem map indices 149 */ 150 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - (caddr_t)VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT]) 151 152 /* 153 * Deprecated macro versions of not-quite-malloc() and free(). 154 */ 155 #define MALLOC(space, cast, size, type, flags) \ 156 (space) = (cast)malloc((u_long)(size), (type), (flags)) 157 #define FREE(addr, type) free((addr), (type)) 158 159 /* 160 * XXX this should be declared in <sys/uio.h>, but that tends to fail 161 * because <sys/uio.h> is included in a header before the source file 162 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined. 163 */ 164 MALLOC_DECLARE(M_IOV); 165 166 /* XXX struct malloc_type is unused for contig*(). */ 167 void contigfree (void *addr, unsigned long size, 168 struct malloc_type *type); 169 void *contigmalloc (unsigned long size, struct malloc_type *type, 170 int flags, vm_paddr_t low, vm_paddr_t high, 171 unsigned long alignment, unsigned long boundary); 172 void free (void *addr, struct malloc_type *type); 173 void *malloc (unsigned long size, struct malloc_type *type, int flags); 174 void malloc_init (void *); 175 void malloc_uninit (void *); 176 void *realloc (void *addr, unsigned long size, 177 struct malloc_type *type, int flags); 178 void *reallocf (void *addr, unsigned long size, 179 struct malloc_type *type, int flags); 180 181 #endif /* _KERNEL */ 182 183 #endif /* !_SYS_MALLOC_H_ */ 184