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/arch/ia64/sn/kernel/sn2/timer_interrupt.c

https://bitbucket.org/evzijst/gittest
C | 63 lines | 23 code | 5 blank | 35 comment | 6 complexity | 4ec2a73c1b7fb98870a3dfb6dcc97c59 MD5 | raw file
 1/*
 2 *
 3 *
 4 * Copyright (c) 2003 Silicon Graphics, Inc.  All Rights Reserved.
 5 * 
 6 * This program is free software; you can redistribute it and/or modify it 
 7 * under the terms of version 2 of the GNU General Public License 
 8 * as published by the Free Software Foundation.
 9 * 
10 * This program is distributed in the hope that it would be useful, but 
11 * WITHOUT ANY WARRANTY; without even the implied warranty of 
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
13 * 
14 * Further, this software is distributed without any warranty that it is 
15 * free of the rightful claim of any third person regarding infringement 
16 * or the like.  Any license provided herein, whether implied or 
17 * otherwise, applies only to this software file.  Patent licenses, if 
18 * any, provided herein do not apply to combinations of this program with 
19 * other software, or any other product whatsoever.
20 * 
21 * You should have received a copy of the GNU General Public 
22 * License along with this program; if not, write the Free Software 
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 * 
25 * Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 
26 * Mountain View, CA  94043, or:
27 * 
28 * http://www.sgi.com 
29 * 
30 * For further information regarding this notice, see: 
31 * 
32 * http://oss.sgi.com/projects/GenInfo/NoticeExplan
33 */
34
35#include <linux/interrupt.h>
36#include <asm/sn/pda.h>
37#include <asm/sn/leds.h>
38
39extern void sn_lb_int_war_check(void);
40extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
41
42#define SN_LB_INT_WAR_INTERVAL 100
43
44void sn_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
45{
46	/* LED blinking */
47	if (!pda->hb_count--) {
48		pda->hb_count = HZ / 2;
49		set_led_bits(pda->hb_state ^=
50			     LED_CPU_HEARTBEAT, LED_CPU_HEARTBEAT);
51	}
52
53	if (enable_shub_wars_1_1()) {
54		/* Bugfix code for SHUB 1.1 */
55		if (pda->pio_shub_war_cam_addr)
56			*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
57	}
58	if (pda->sn_lb_int_war_ticks == 0)
59		sn_lb_int_war_check();
60	pda->sn_lb_int_war_ticks++;
61	if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
62		pda->sn_lb_int_war_ticks = 0;
63}