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Diffstat (limited to 'rumpdisk/ioccom-rump.h')
| -rw-r--r-- | rumpdisk/ioccom-rump.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/rumpdisk/ioccom-rump.h b/rumpdisk/ioccom-rump.h new file mode 100644 index 00000000..6f41b05b --- /dev/null +++ b/rumpdisk/ioccom-rump.h @@ -0,0 +1,82 @@ +/* $NetBSD: ioccom.h,v 1.12 2014/12/10 00:16:05 christos Exp $ */ + +/*- + * Copyright (c) 1982, 1986, 1990, 1993, 1994 + * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. + * + * @(#)ioccom.h 8.3 (Berkeley) 1/9/95 + */ + +#ifndef _SYS_IOCCOM_H_ +#define _SYS_IOCCOM_H_ + +/* + * Ioctl's have the command encoded in the lower word, and the size of + * any in or out parameters in the upper word. The high 3 bits of the + * upper word are used to encode the in/out status of the parameter. + * + * 31 29 28 16 15 8 7 0 + * +---------------------------------------------------------------+ + * | I/O | Parameter Length | Command Group | Command | + * +---------------------------------------------------------------+ + */ +#define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ +#define IOCPARM_SHIFT 16 +#define IOCGROUP_SHIFT 8 +#define IOCPARM_LEN(x) (((x) >> IOCPARM_SHIFT) & IOCPARM_MASK) +#define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) +#define IOCGROUP(x) (((x) >> IOCGROUP_SHIFT) & 0xff) + +#define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */ + /* no parameters */ +#define IOC_VOID (unsigned long)0x20000000 + /* copy parameters out */ +#define IOC_OUT (unsigned long)0x40000000 + /* copy parameters in */ +#define IOC_IN (unsigned long)0x80000000 + /* copy parameters in and out */ +#define IOC_INOUT (IOC_IN|IOC_OUT) + /* mask for IN/OUT/VOID */ +#define IOC_DIRMASK (unsigned long)0xe0000000 + +#define _IOC(inout, group, num, len) \ + ((inout) | (((len) & IOCPARM_MASK) << IOCPARM_SHIFT) | \ + ((group) << IOCGROUP_SHIFT) | (num)) +#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) +#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) +#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) +/* this should be _IORW, but stdio got there first */ +#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) + +#define IOCSNPRINTF(buf, len, cmd) \ + snprintf((buf), (len), "_IO%s%s('%c', %hhu)", \ + (((cmd) >> 30) & 1) ? "W" : "", \ + (((cmd) >> 30) & 2) ? "R" : "", \ + (char)IOCGROUP(cmd), (unsigned char)(cmd)) + + +#endif /* !_SYS_IOCCOM_H_ */ |