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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_VMEM_H
#define _SYS_VMEM_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Per-allocation flags
*/
#define VM_SLEEP 0x00000000 /* same as KM_SLEEP */
#define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */
#define VM_PANIC 0x00000002 /* same as KM_PANIC */
#define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */
#define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */
#define VM_BESTFIT 0x00000100
#define VM_FIRSTFIT 0x00000200
#define VM_NEXTFIT 0x00000400
/*
* The following flags are restricted for use only within the kernel.
* VM_MEMLOAD is for use by the HAT to avoid infinite recursion.
* VM_NORELOC is used by the kernel when static VA->PA mappings are required.
*/
#define VM_MEMLOAD 0x00000800
#define VM_NORELOC 0x00001000
/*
* VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags
* and forgo reaping if the allocation or attempted import, fails. This
* flag is a segkmem-specific flag, and should not be used by anyone else.
*/
#define VM_ABORT 0x00002000
#define VM_FLAGS 0x0000FFFF
/*
* Arena creation flags
*/
#define VMC_POPULATOR 0x00010000
#define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */
#define VMC_IDENTIFIER 0x00040000 /* not backed by memory */
/*
* internal use only; the import function uses the vmem_ximport_t interface
* and may increase the request size if it so desires
*/
#define VMC_XALLOC 0x00080000
#define VMC_FLAGS 0xFFFF0000
/*
* Public segment types
*/
#define VMEM_ALLOC 0x01
#define VMEM_FREE 0x02
/*
* Implementation-private segment types
*/
#define VMEM_SPAN 0x10
#define VMEM_ROTOR 0x20
#define VMEM_WALKER 0x40
/*
* VMEM_REENTRANT indicates to vmem_walk() that the callback routine may
* call back into the arena being walked, so vmem_walk() must drop the
* arena lock before each callback. The caveat is that since the arena
* isn't locked, its state can change. Therefore it is up to the callback
* routine to handle cases where the segment isn't of the expected type.
* For example, we use this to walk heap_arena when generating a crash dump;
* see segkmem_dump() for sample usage.
*/
#define VMEM_REENTRANT 0x80000000
typedef struct vmem vmem_t;
typedef void *(vmem_alloc_t)(vmem_t *, size_t, int);
typedef void (vmem_free_t)(vmem_t *, void *, size_t);
/*
* Alternate import style; the requested size is passed in a pointer,
* which can be increased by the import function if desired.
*/
typedef void *(vmem_ximport_t)(vmem_t *, size_t *, int);
#ifdef _KERNEL
extern vmem_t *vmem_init(const char *, void *, size_t, size_t,
vmem_alloc_t *, vmem_free_t *);
extern void vmem_update(void *);
extern int vmem_is_populator();
extern size_t vmem_seg_size;
#endif
extern vmem_t *vmem_create(const char *, void *, size_t, size_t,
vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int);
extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t,
vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int);
extern void vmem_destroy(vmem_t *);
extern void *vmem_alloc(vmem_t *, size_t, int);
extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t,
void *, void *, int);
extern void vmem_free(vmem_t *, void *, size_t);
extern void vmem_xfree(vmem_t *, void *, size_t);
extern void *vmem_add(vmem_t *, void *, size_t, int);
extern int vmem_contains(vmem_t *, void *, size_t);
extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *);
extern size_t vmem_size(vmem_t *, int);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_VMEM_H */
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