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.
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.
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]
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
29 #pragma ident "%Z%%M% %I% %E% SMI"
31 #include <sys/types.h>
39 * Per-allocation flags
41 #define VM_SLEEP 0x00000000 /* same as KM_SLEEP */
42 #define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */
43 #define VM_PANIC 0x00000002 /* same as KM_PANIC */
44 #define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */
45 #define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */
47 #define VM_BESTFIT 0x00000100
48 #define VM_FIRSTFIT 0x00000200
49 #define VM_NEXTFIT 0x00000400
52 * The following flags are restricted for use only within the kernel.
53 * VM_MEMLOAD is for use by the HAT to avoid infinite recursion.
54 * VM_NORELOC is used by the kernel when static VA->PA mappings are required.
56 #define VM_MEMLOAD 0x00000800
57 #define VM_NORELOC 0x00001000
59 * VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags
60 * and forgo reaping if the allocation or attempted import, fails. This
61 * flag is a segkmem-specific flag, and should not be used by anyone else.
63 #define VM_ABORT 0x00002000
65 #define VM_FLAGS 0x0000FFFF
68 * Arena creation flags
70 #define VMC_POPULATOR 0x00010000
71 #define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */
72 #define VMC_IDENTIFIER 0x00040000 /* not backed by memory */
74 * internal use only; the import function uses the vmem_ximport_t interface
75 * and may increase the request size if it so desires.
76 * VMC_XALIGN, for use with vmem_xcreate, specifies that
77 * the address returned by the import function will be
78 * aligned according to the alignment argument.
80 #define VMC_XALLOC 0x00080000
81 #define VMC_XALIGN 0x00100000
82 #define VMC_FLAGS 0xFFFF0000
85 * Public segment types
87 #define VMEM_ALLOC 0x01
88 #define VMEM_FREE 0x02
91 * Implementation-private segment types
93 #define VMEM_SPAN 0x10
94 #define VMEM_ROTOR 0x20
95 #define VMEM_WALKER 0x40
98 * VMEM_REENTRANT indicates to vmem_walk() that the callback routine may
99 * call back into the arena being walked, so vmem_walk() must drop the
100 * arena lock before each callback. The caveat is that since the arena
101 * isn't locked, its state can change. Therefore it is up to the callback
102 * routine to handle cases where the segment isn't of the expected type.
103 * For example, we use this to walk heap_arena when generating a crash dump;
104 * see segkmem_dump() for sample usage.
106 #define VMEM_REENTRANT 0x80000000
108 typedef struct vmem vmem_t;
109 typedef void *(vmem_alloc_t)(vmem_t *, size_t, int);
110 typedef void (vmem_free_t)(vmem_t *, void *, size_t);
113 * Alternate import style; the requested size is passed in a pointer,
114 * which can be increased by the import function if desired.
116 typedef void *(vmem_ximport_t)(vmem_t *, size_t *, size_t, int);
119 extern vmem_t *vmem_init(const char *, void *, size_t, size_t,
120 vmem_alloc_t *, vmem_free_t *);
121 extern void vmem_update(void *);
122 extern int vmem_is_populator();
123 extern size_t vmem_seg_size;
126 extern vmem_t *vmem_create(const char *, void *, size_t, size_t,
127 vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int);
128 extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t,
129 vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int);
130 extern void vmem_destroy(vmem_t *);
131 extern void *vmem_alloc(vmem_t *, size_t, int);
132 extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t,
133 void *, void *, int);
134 extern void vmem_free(vmem_t *, void *, size_t);
135 extern void vmem_xfree(vmem_t *, void *, size_t);
136 extern void *vmem_add(vmem_t *, void *, size_t, int);
137 extern int vmem_contains(vmem_t *, void *, size_t);
138 extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *);
139 extern size_t vmem_size(vmem_t *, int);
145 #endif /* _SYS_VMEM_H */