4 * Copyright (c) 2005 Silicon Graphics, Inc. All Rights Reserved.
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.
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.
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.
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.
25 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
26 * Mountain View, CA 94043, or:
30 * For further information regarding this notice, see:
32 * http://oss.sgi.com/projects/GenInfo/NoticeExplan
35 #include <linux/interrupt.h>
36 #include <asm/sn/pda.h>
37 #include <asm/sn/leds.h>
39 extern void sn_lb_int_war_check(void);
40 extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
42 #define SN_LB_INT_WAR_INTERVAL 100
44 void sn_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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);
54 if (enable_shub_wars_1_1()) {
55 /* Bugfix code for SHUB 1.1 */
56 if (pda->pio_shub_war_cam_addr)
57 *pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
59 if (pda->sn_lb_int_war_ticks == 0)
60 sn_lb_int_war_check();
61 pda->sn_lb_int_war_ticks++;
62 if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
63 pda->sn_lb_int_war_ticks = 0;