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) 2001-2003 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 
34 typedef 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