/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _MACH_DESCRIP_H
#define _MACH_DESCRIP_H
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/kstat.h>
#include <sys/ksynch.h>
#include <sys/mdesc.h>
/*
* MD memory operations (memops) are of two types:
* buf:
* Buffer allocator routines used to allocate the MD buffer.
* Allocator must support an alignment argument.
*
* meta:
* Meta allocator routines to allocate meta data strcutures.
* These allocations are small and don't have alignment
* requirements. Examples, md_t handles and the machine_descrip_t
* structure.
*/
typedef struct machine_descrip_memops {
void *(*buf_allocp)(size_t size, size_t align);
void (*buf_freep)(void *, size_t size);
void *(*meta_allocp)(size_t size);
void (*meta_freep)(void *, size_t size);
} machine_descrip_memops_t;
/*
* Common structure/list between kernel and mdesc driver enabling
* the current machine description to be retrieved or updated.
*
* Locks:
* The current global MD is protected by the curr_mach_descrip_lock.
* Each Machine description has a lock to synchronize its ref count.
* The Obsolete MD list is protected by the obs_list_lock.
*/
typedef struct machine_descrip_s {
uint64_t gen; /* Generation number for MD */
kmutex_t lock; /* synchronize access to MD */
void *va; /* virtual address */
uint64_t size; /* size of MD */
uint64_t space; /* space allocated for MD */
int refcnt; /* MD ref count */
struct machine_descrip_s *next; /* Next MD in list */
machine_descrip_memops_t *memops; /* Memory operations for MD */
} machine_descrip_t;
/*
* Utility wrappers to get/fini a handle to the current MD.
*/
extern md_t *md_get_handle(void);
extern int md_fini_handle(md_t *);
extern caddr_t md_get_md_raw(md_t *);
extern int md_alloc_scan_dag(md_t *, mde_cookie_t, char *, char *,
mde_cookie_t **);
extern void md_free_scan_dag(md_t *, mde_cookie_t **);
extern uint64_t md_get_current_gen(void);
#ifdef __cplusplus
}
#endif
#endif /* _MACH_DESCRIP_H */