2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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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 1.9 2003/10/18 05:48:44 dillon Exp $
38 #ifndef _SYS_MALLOC_H_
39 #define _SYS_MALLOC_H_
43 #ifndef _MACHINE_PARAM_H_
44 #include <machine/param.h> /* for SMP_MAXCPU */
46 #ifndef _MACHINE_VMPARAM_H_
47 #include <machine/vmparam.h> /* for VM_MIN_KERNEL_ADDRESS */
50 #define splmem splhigh
54 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
59 #define M_NOWAIT 0x0001 /* do not block */
60 #define M_WAITOK 0x0002 /* wait for resources */
61 #define M_ZERO 0x0100 /* bzero() the allocation */
62 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */
63 #define M_NULLOK 0x0400 /* ok to return NULL in M_WAITOK case */
65 #define M_MAGIC 877983977 /* time when first defined :-) */
68 * The malloc tracking structure. Note that per-cpu entries must be
69 * aggregated for accurate statistics, they do not actually break the
70 * stats down by cpu (e.g. the cpu freeing memory will subtract from
71 * its slot, not the originating cpu's slot).
73 * SMP_MAXCPU is used so modules which use malloc remain compatible
77 struct malloc_type *ks_next; /* next in list */
78 long ks_memuse[SMP_MAXCPU]; /* total memory held in bytes */
79 long ks_loosememuse; /* (inaccurate) aggregate memuse */
80 long ks_limit; /* most that are allowed to exist */
81 long ks_size; /* sizes of this thing that are allocated */
82 long ks_inuse[SMP_MAXCPU]; /* # of allocs currently in use */
83 int64_t ks_calls; /* total packets of this type ever allocated */
84 long ks_maxused; /* maximum number ever used */
85 u_long ks_magic; /* if it's not magic, don't touch it */
86 const char *ks_shortdesc; /* short description */
87 u_short ks_limblocks; /* number of times blocked for hitting limit */
88 u_short ks_mapblocks; /* number of times blocked for kernel map */
89 long ks_reserved[4]; /* future use (module compatibility) */
95 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
96 struct malloc_type type[1] = { \
97 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
99 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \
100 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
102 #define MALLOC_DECLARE(type) \
103 extern struct malloc_type type[1]
105 MALLOC_DECLARE(M_CACHE);
106 MALLOC_DECLARE(M_DEVBUF);
107 MALLOC_DECLARE(M_TEMP);
109 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
110 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
113 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
116 * Array of descriptors that describe the contents of each page
119 #ifdef NO_SLAB_ALLOCATOR
120 short ku_indx; /* bucket index */
122 short ku_cpu; /* cpu index */
125 u_short freecnt;/* for small allocations, free pieces in page */
126 u_short pagecnt;/* for large allocations, pages alloced */
129 #define ku_freecnt ku_un.freecnt
130 #define ku_pagecnt ku_un.pagecnt
133 * Set of buckets for each size of memory block that is retained
136 caddr_t kb_next; /* list of free blocks */
137 caddr_t kb_last; /* last free block */
138 int64_t kb_calls; /* total calls to allocate this size */
139 long kb_total; /* total number of blocks allocated */
140 long kb_elmpercl; /* # of elements in this sized allocation */
141 long kb_totalfree; /* # of free elements in this bucket */
142 long kb_highwat; /* high water mark */
143 long kb_couldfree; /* over high water mark and could free */
146 #define MINALLOCSIZE (1 << MINBUCKET)
147 #define BUCKETINDX(size) \
148 ((size) <= (MINALLOCSIZE * 128) \
149 ? (size) <= (MINALLOCSIZE * 8) \
150 ? (size) <= (MINALLOCSIZE * 2) \
151 ? (size) <= (MINALLOCSIZE * 1) \
154 : (size) <= (MINALLOCSIZE * 4) \
157 : (size) <= (MINALLOCSIZE* 32) \
158 ? (size) <= (MINALLOCSIZE * 16) \
161 : (size) <= (MINALLOCSIZE * 64) \
164 : (size) <= (MINALLOCSIZE * 2048) \
165 ? (size) <= (MINALLOCSIZE * 512) \
166 ? (size) <= (MINALLOCSIZE * 256) \
169 : (size) <= (MINALLOCSIZE * 1024) \
172 : (size) <= (MINALLOCSIZE * 8192) \
173 ? (size) <= (MINALLOCSIZE * 4096) \
176 : (size) <= (MINALLOCSIZE * 16384) \
185 * Turn virtual addresses into kmem map indices
187 #if defined(USE_KMEM_MAP)
188 #define kmemxtob(alloc) (kmembase + (alloc) * PAGE_SIZE)
189 #define btokmemx(addr) (((caddr_t)(addr) - kmembase) / PAGE_SIZE)
190 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
192 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - (caddr_t)VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT])
196 * Deprecated macro versions of not-quite-malloc() and free().
198 #define MALLOC(space, cast, size, type, flags) \
199 (space) = (cast)malloc((u_long)(size), (type), (flags))
200 #define FREE(addr, type) free((addr), (type))
203 * XXX this should be declared in <sys/uio.h>, but that tends to fail
204 * because <sys/uio.h> is included in a header before the source file
205 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
207 MALLOC_DECLARE(M_IOV);
209 /* XXX struct malloc_type is unused for contig*(). */
210 void contigfree (void *addr, unsigned long size,
211 struct malloc_type *type);
212 void *contigmalloc (unsigned long size, struct malloc_type *type,
213 int flags, unsigned long low, unsigned long high,
214 unsigned long alignment, unsigned long boundary);
215 void free (void *addr, struct malloc_type *type);
216 void *malloc (unsigned long size, struct malloc_type *type, int flags);
217 void malloc_init (void *);
218 void malloc_uninit (void *);
219 void *realloc (void *addr, unsigned long size,
220 struct malloc_type *type, int flags);
221 void *reallocf (void *addr, unsigned long size,
222 struct malloc_type *type, int flags);
226 #endif /* !_SYS_MALLOC_H_ */