1/*
2 *
3 *
4 * Copyright (c) 2005, 2006 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 * For further information regarding this notice, see:
26 *
27 * http://oss.sgi.com/projects/GenInfo/NoticeExplan
28 */
29
30#include <linux/interrupt.h>
31#include <asm/sn/pda.h>
32#include <asm/sn/leds.h>
33
34extern void sn_lb_int_war_check(void);
35extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
36
37#define SN_LB_INT_WAR_INTERVAL 100
38
39void sn_timer_interrupt(int irq, void *dev_id)
40{
41	/* LED blinking */
42	if (!pda->hb_count--) {
43		pda->hb_count = HZ / 2;
44		set_led_bits(pda->hb_state ^=
45			     LED_CPU_HEARTBEAT, LED_CPU_HEARTBEAT);
46	}
47
48	if (is_shub1()) {
49		if (enable_shub_wars_1_1()) {
50			/* Bugfix code for SHUB 1.1 */
51			if (pda->pio_shub_war_cam_addr)
52				*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
53		}
54		if (pda->sn_lb_int_war_ticks == 0)
55			sn_lb_int_war_check();
56		pda->sn_lb_int_war_ticks++;
57		if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
58			pda->sn_lb_int_war_ticks = 0;
59	}
60}
61