Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |
| 39 | extern void sn_lb_int_war_check(void); |
| 40 | extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); |
| 41 | |
| 42 | #define SN_LB_INT_WAR_INTERVAL 100 |
| 43 | |
| 44 | void 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 | } |