1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #ifndef _SYS_KMEM_H 31 #define _SYS_KMEM_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #include <sys/types.h> 36 #include <sys/vmem.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Kernel memory allocator: DDI interfaces. 44 * See kmem_alloc(9F) for details. 45 */ 46 47 #define KM_SLEEP 0x0000 /* can block for memory; success guaranteed */ 48 #define KM_NOSLEEP 0x0001 /* cannot block for memory; may fail */ 49 #define KM_PANIC 0x0002 /* if memory cannot be allocated, panic */ 50 #define KM_PUSHPAGE 0x0004 /* can block for memory; may use reserve */ 51 #define KM_VMFLAGS 0x00ff /* flags that must match VM_* flags */ 52 53 #define KM_FLAGS 0xffff /* all settable kmem flags */ 54 55 #ifdef _KERNEL 56 57 extern void *kmem_alloc(size_t size, int kmflags); 58 extern void *kmem_zalloc(size_t size, int kmflags); 59 extern void kmem_free(void *buf, size_t size); 60 extern void *kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags); 61 62 #endif /* _KERNEL */ 63 64 /* 65 * Kernel memory allocator: private interfaces. 66 * These interfaces are still evolving. 67 * Do not use them in unbundled drivers. 68 */ 69 70 /* 71 * Flags for kmem_cache_create() 72 */ 73 #define KMC_NOTOUCH 0x00010000 74 #define KMC_NODEBUG 0x00020000 75 #define KMC_NOMAGAZINE 0x00040000 76 #define KMC_NOHASH 0x00080000 77 #define KMC_QCACHE 0x00100000 78 #define KMC_KMEM_ALLOC 0x00200000 /* internal use only */ 79 #define KMC_IDENTIFIER 0x00400000 /* internal use only */ 80 81 struct kmem_cache; /* cache structure is opaque to kmem clients */ 82 83 typedef struct kmem_cache kmem_cache_t; 84 85 /* Client response to kmem move callback */ 86 typedef enum kmem_cbrc { 87 KMEM_CBRC_YES, 88 KMEM_CBRC_NO, 89 KMEM_CBRC_LATER, 90 KMEM_CBRC_DONT_NEED, 91 KMEM_CBRC_DONT_KNOW 92 } kmem_cbrc_t; 93 94 #ifdef _KERNEL 95 96 extern int kmem_ready; 97 extern pgcnt_t kmem_reapahead; 98 99 extern void kmem_init(void); 100 extern void kmem_thread_init(void); 101 extern void kmem_mp_init(void); 102 extern void kmem_reap(void); 103 extern void kmem_reap_idspace(void); 104 extern int kmem_debugging(void); 105 extern size_t kmem_avail(void); 106 extern size_t kmem_maxavail(void); 107 108 extern kmem_cache_t *kmem_cache_create(char *, size_t, size_t, 109 int (*)(void *, void *, int), void (*)(void *, void *), 110 void (*)(void *), void *, vmem_t *, int); 111 extern void kmem_cache_set_move(kmem_cache_t *, 112 kmem_cbrc_t (*)(void *, void *, size_t, void *)); 113 extern void kmem_cache_destroy(kmem_cache_t *); 114 extern void *kmem_cache_alloc(kmem_cache_t *, int); 115 extern void kmem_cache_free(kmem_cache_t *, void *); 116 extern uint64_t kmem_cache_stat(kmem_cache_t *, char *); 117 extern void kmem_cache_reap_now(kmem_cache_t *); 118 extern void kmem_cache_move_notify(kmem_cache_t *, void *); 119 120 #endif /* _KERNEL */ 121 122 #ifdef __cplusplus 123 } 124 #endif 125 126 #endif /* _SYS_KMEM_H */ 127