94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
/* $NetBSD: md.h,v 1.7 2001/07/02 17:17:25 uch Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995 Gordon W. Ross
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
* 4. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Gordon W. Ross
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Memory-disk ioctl functions:
|
|
*/
|
|
|
|
#include <sys/ioccom.h>
|
|
|
|
struct md_conf {
|
|
caddr_t md_addr;
|
|
size_t md_size;
|
|
int md_type;
|
|
};
|
|
|
|
#define MD_GETCONF _IOR('r', 0, struct md_conf) /* get unit config */
|
|
#define MD_SETCONF _IOW('r', 1, struct md_conf) /* set unit config */
|
|
|
|
/*
|
|
* There are three configurations supported for each unit,
|
|
* reflected in the value of the md_type field:
|
|
*/
|
|
#define MD_UNCONFIGURED 0
|
|
/*
|
|
* Not yet configured. Open returns ENXIO.
|
|
*/
|
|
#define MD_KMEM_FIXED 1
|
|
/*
|
|
* Disk image resident in kernel (patched in or loaded).
|
|
* Requires that the function: md_set_kmem() is called to
|
|
* attach the (initialized) kernel memory to be used by the
|
|
* device. It can be initialized by an "open hook" if this
|
|
* driver is compiled with the MD_OPEN_HOOK option.
|
|
* No attempt will ever be made to free this memory.
|
|
*/
|
|
#define MD_KMEM_ALLOCATED 2
|
|
/*
|
|
* Small, wired-down chunk of kernel memory obtained from
|
|
* kmem_alloc(). The allocation is performed by an ioctl
|
|
* call on the raw partition.
|
|
*/
|
|
#define MD_UMEM_SERVER 3
|
|
/*
|
|
* Indirect access to user-space of a user-level server.
|
|
* (Like the MFS hack, but better! 8^) Device operates
|
|
* only while the server has the raw partition open and
|
|
* continues to service I/O requests. The process that
|
|
* does this setconf will become the I/O server. This
|
|
* configuration type can be disabled using:
|
|
* options MEMORY_DISK_SERVER=0
|
|
*/
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* If the option MEMORY_DISK_HOOKS is on, then these functions are
|
|
* called by the ramdisk driver to allow machine-dependent to
|
|
* match/configure and/or load each ramdisk unit.
|
|
*/
|
|
extern void md_attach_hook(int, struct md_conf *);
|
|
extern void md_open_hook(int, struct md_conf *);
|
|
#ifdef MEMORY_DISK_DYNAMIC
|
|
extern void md_root_setconf(char *, size_t);
|
|
#endif
|
|
#endif /* _KERNEL */
|