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 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25#ifndef _SYS_VMEM_H 26#define _SYS_VMEM_H 27 28#include <sys/types.h> 29 30#ifdef __cplusplus 31extern "C" { 32#endif 33 34 35/* 36 * Per-allocation flags 37 */ 38#define VM_SLEEP 0x00000000 /* same as KM_SLEEP */ 39#define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */ 40#define VM_PANIC 0x00000002 /* same as KM_PANIC */ 41#define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */ 42#define VM_NORMALPRI 0x00000008 /* same as KM_NORMALPRI */ 43#define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */ 44 45#define VM_BESTFIT 0x00000100 46#define VM_FIRSTFIT 0x00000200 47#define VM_NEXTFIT 0x00000400 48 49/* 50 * The following flags are restricted for use only within the kernel. 51 * VM_MEMLOAD is for use by the HAT to avoid infinite recursion. 52 * VM_NORELOC is used by the kernel when static VA->PA mappings are required. 53 */ 54#define VM_MEMLOAD 0x00000800 55#define VM_NORELOC 0x00001000 56/* 57 * VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags 58 * and forgo reaping if the allocation or attempted import, fails. This 59 * flag is a segkmem-specific flag, and should not be used by anyone else. 60 */ 61#define VM_ABORT 0x00002000 62 63/* 64 * VM_ENDALLOC requests that large addresses be preferred in allocations. 65 * Has no effect if VM_NEXTFIT is active. 66 */ 67#define VM_ENDALLOC 0x00004000 68 69#define VM_FLAGS 0x0000FFFF 70 71/* 72 * Arena creation flags 73 */ 74#define VMC_POPULATOR 0x00010000 75#define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */ 76#define VMC_IDENTIFIER 0x00040000 /* not backed by memory */ 77#define VMC_DUMPSAFE 0x00200000 /* can use alternate dump memory */ 78/* 79 * internal use only; the import function uses the vmem_ximport_t interface 80 * and may increase the request size if it so desires. 81 * VMC_XALIGN, for use with vmem_xcreate, specifies that 82 * the address returned by the import function will be 83 * aligned according to the alignment argument. 84 */ 85#define VMC_XALLOC 0x00080000 86#define VMC_XALIGN 0x00100000 87#define VMC_FLAGS 0xFFFF0000 88 89/* 90 * Public segment types 91 */ 92#define VMEM_ALLOC 0x01 93#define VMEM_FREE 0x02 94 95/* 96 * Implementation-private segment types 97 */ 98#define VMEM_SPAN 0x10 99#define VMEM_ROTOR 0x20 100#define VMEM_WALKER 0x40 101 102/* 103 * VMEM_REENTRANT indicates to vmem_walk() that the callback routine may 104 * call back into the arena being walked, so vmem_walk() must drop the 105 * arena lock before each callback. The caveat is that since the arena 106 * isn't locked, its state can change. Therefore it is up to the callback 107 * routine to handle cases where the segment isn't of the expected type. 108 * For example, we use this to walk heap_arena when generating a crash dump; 109 * see segkmem_dump() for sample usage. 110 */ 111#define VMEM_REENTRANT 0x80000000 112 113typedef struct vmem vmem_t; 114typedef void *(vmem_alloc_t)(vmem_t *, size_t, int); 115typedef void (vmem_free_t)(vmem_t *, void *, size_t); 116 117/* 118 * Alternate import style; the requested size is passed in a pointer, 119 * which can be increased by the import function if desired. 120 */ 121typedef void *(vmem_ximport_t)(vmem_t *, size_t *, size_t, int); 122 123#ifdef _KERNEL 124extern vmem_t *vmem_init(const char *, void *, size_t, size_t, 125 vmem_alloc_t *, vmem_free_t *); 126extern void vmem_update(void *); 127extern int vmem_is_populator(); 128extern size_t vmem_seg_size; 129#endif 130 131extern vmem_t *vmem_create(const char *, void *, size_t, size_t, 132 vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int); 133extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t, 134 vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int); 135extern void vmem_destroy(vmem_t *); 136extern void *vmem_alloc(vmem_t *, size_t, int); 137extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t, 138 void *, void *, int); 139extern void vmem_free(vmem_t *, void *, size_t); 140extern void vmem_xfree(vmem_t *, void *, size_t); 141extern void *vmem_add(vmem_t *, void *, size_t, int); 142extern int vmem_contains(vmem_t *, void *, size_t); 143extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *); 144extern size_t vmem_size(vmem_t *, int); 145 146#ifdef __cplusplus 147} 148#endif 149 150#endif /* _SYS_VMEM_H */ 151