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 (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 #ifndef _SYS_KMEM_H 30 #define _SYS_KMEM_H 31 32 #include <sys/types.h> 33 #include <sys/vmem.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * Kernel memory allocator: DDI interfaces. 41 * See kmem_alloc(9F) for details. 42 */ 43 44 #define KM_SLEEP 0x0000 /* can block for memory; success guaranteed */ 45 #define KM_NOSLEEP 0x0001 /* cannot block for memory; may fail */ 46 #define KM_PANIC 0x0002 /* if memory cannot be allocated, panic */ 47 #define KM_PUSHPAGE 0x0004 /* can block for memory; may use reserve */ 48 #define KM_VMFLAGS 0x00ff /* flags that must match VM_* flags */ 49 50 #define KM_FLAGS 0xffff /* all settable kmem flags */ 51 52 #ifdef _KERNEL 53 54 extern void *kmem_alloc(size_t size, int kmflags); 55 extern void *kmem_zalloc(size_t size, int kmflags); 56 extern void kmem_free(void *buf, size_t size); 57 extern void *kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags); 58 extern void kmem_dump_init(size_t); 59 extern void kmem_dump_begin(void); 60 extern size_t kmem_dump_finish(char *buf, size_t size); 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 #define KMC_PREFILL 0x00800000 81 82 struct kmem_cache; /* cache structure is opaque to kmem clients */ 83 84 typedef struct kmem_cache kmem_cache_t; 85 86 /* Client response to kmem move callback */ 87 typedef enum kmem_cbrc { 88 KMEM_CBRC_YES, 89 KMEM_CBRC_NO, 90 KMEM_CBRC_LATER, 91 KMEM_CBRC_DONT_NEED, 92 KMEM_CBRC_DONT_KNOW 93 } kmem_cbrc_t; 94 95 #ifdef _KERNEL 96 97 extern int kmem_ready; 98 extern pgcnt_t kmem_reapahead; 99 100 extern void kmem_init(void); 101 extern void kmem_thread_init(void); 102 extern void kmem_mp_init(void); 103 extern void kmem_reap(void); 104 extern void kmem_reap_idspace(void); 105 extern int kmem_debugging(void); 106 extern size_t kmem_avail(void); 107 extern size_t kmem_maxavail(void); 108 109 extern kmem_cache_t *kmem_cache_create(char *, size_t, size_t, 110 int (*)(void *, void *, int), void (*)(void *, void *), 111 void (*)(void *), void *, vmem_t *, int); 112 extern void kmem_cache_set_move(kmem_cache_t *, 113 kmem_cbrc_t (*)(void *, void *, size_t, void *)); 114 extern void kmem_cache_destroy(kmem_cache_t *); 115 extern void *kmem_cache_alloc(kmem_cache_t *, int); 116 extern void kmem_cache_free(kmem_cache_t *, void *); 117 extern uint64_t kmem_cache_stat(kmem_cache_t *, char *); 118 extern void kmem_cache_reap_now(kmem_cache_t *); 119 extern void kmem_cache_move_notify(kmem_cache_t *, void *); 120 121 #endif /* _KERNEL */ 122 123 #ifdef __cplusplus 124 } 125 #endif 126 127 #endif /* _SYS_KMEM_H */ 128