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TOMOYO Linux Cross Reference
Linux/arch/ia64/sn/kernel/sn2/timer_interrupt.c

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  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 
 34 extern void sn_lb_int_war_check(void);
 35 extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 36 
 37 #define SN_LB_INT_WAR_INTERVAL 100
 38 
 39 void 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 

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