1/*
2 * Intel Multimedia Timer device interface
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (c) 2001-2002 Silicon Graphics, Inc.  All rights reserved.
9 *
10 * Helper file for the SN implementation of mmtimers
11 *
12 * 11/01/01 - jbarnes - initial revision
13 */
14
15#ifndef _SN_MMTIMER_PRIVATE_H
16
17#define RTC_BITS 55 /* 55 bits for this implementation */
18#define NUM_COMPARATORS 2 /* two comparison registers in SN1 */
19
20/*
21 * Check for an interrupt and clear the pending bit if
22 * one is waiting.
23 */
24#define MMTIMER_INT_PENDING(x) (x ? *(RTC_INT_PENDING_B_ADDR) : *(RTC_INT_PENDING_A_ADDR))
25
26/*
27 * Set interrupts on RTC 'x' to 'v' (true or false)
28 */
29#define MMTIMER_SET_INT(x,v) (x ? (*(RTC_INT_ENABLED_B_ADDR) = (unsigned long)(v)) : (*(RTC_INT_ENABLED_A_ADDR) = (unsigned long)(v)))
30
31#define MMTIMER_ENABLE_INT(x) MMTIMER_SET_INT(x, 1)
32#define MMTIMER_DISABLE_INT(x) MMTIMER_SET_INT(x, 0)
33
34typedef struct mmtimer {
35	spinlock_t timer_lock;
36	unsigned long periodic;
37	int signo;
38	volatile unsigned long *compare;
39	struct task_struct *process;
40} mmtimer_t;
41
42#endif /* _SN_LINUX_MMTIMER_PRIVATE_H */
43