mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
2.1 KiB
57 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
|
/* |
|
* Intel Multimedia Timer device interface |
|
* |
|
* This file is subject to the terms and conditions of the GNU General Public |
|
* License. See the file "COPYING" in the main directory of this archive |
|
* for more details. |
|
* |
|
* Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved. |
|
* |
|
* This file should define an interface compatible with the IA-PC Multimedia |
|
* Timers Draft Specification (rev. 0.97) from Intel. Note that some |
|
* hardware may not be able to safely export its registers to userspace, |
|
* so the ioctl interface should support all necessary functionality. |
|
* |
|
* 11/01/01 - jbarnes - initial revision |
|
* 9/10/04 - Christoph Lameter - remove interrupt support |
|
* 9/17/04 - jbarnes - remove test program, move some #defines to the driver |
|
*/ |
|
|
|
#ifndef _LINUX_MMTIMER_H |
|
#define _LINUX_MMTIMER_H |
|
|
|
/* |
|
* Breakdown of the ioctl's available. An 'optional' next to the command |
|
* indicates that supporting this command is optional, while 'required' |
|
* commands must be implemented if conformance is desired. |
|
* |
|
* MMTIMER_GETOFFSET - optional |
|
* Should return the offset (relative to the start of the page where the |
|
* registers are mapped) for the counter in question. |
|
* |
|
* MMTIMER_GETRES - required |
|
* The resolution of the clock in femto (10^-15) seconds |
|
* |
|
* MMTIMER_GETFREQ - required |
|
* Frequency of the clock in Hz |
|
* |
|
* MMTIMER_GETBITS - required |
|
* Number of bits in the clock's counter |
|
* |
|
* MMTIMER_MMAPAVAIL - required |
|
* Returns nonzero if the registers can be mmap'd into userspace, 0 otherwise |
|
* |
|
* MMTIMER_GETCOUNTER - required |
|
* Gets the current value in the counter |
|
*/ |
|
#define MMTIMER_IOCTL_BASE 'm' |
|
|
|
#define MMTIMER_GETOFFSET _IO(MMTIMER_IOCTL_BASE, 0) |
|
#define MMTIMER_GETRES _IOR(MMTIMER_IOCTL_BASE, 1, unsigned long) |
|
#define MMTIMER_GETFREQ _IOR(MMTIMER_IOCTL_BASE, 2, unsigned long) |
|
#define MMTIMER_GETBITS _IO(MMTIMER_IOCTL_BASE, 4) |
|
#define MMTIMER_MMAPAVAIL _IO(MMTIMER_IOCTL_BASE, 6) |
|
#define MMTIMER_GETCOUNTER _IOR(MMTIMER_IOCTL_BASE, 9, unsigned long) |
|
|
|
#endif /* _LINUX_MMTIMER_H */
|
|
|