1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device 4 * for Intel part #(s): 5 * - AF82MP20 PCH 6 * 7 * Copyright (C) 2009-2010 Intel Corporation. All rights reserved. 8 */ 9 10 #ifndef __INTEL_SCU_WATCHDOG_H 11 #define __INTEL_SCU_WATCHDOG_H 12 13 #define WDT_VER "0.3" 14 15 /* minimum time between interrupts */ 16 #define MIN_TIME_CYCLE 1 17 18 /* Time from warning to reboot is 2 seconds */ 19 #define DEFAULT_SOFT_TO_HARD_MARGIN 2 20 21 #define MAX_TIME 170 22 23 #define DEFAULT_TIME 5 24 25 #define MAX_SOFT_TO_HARD_MARGIN (MAX_TIME-MIN_TIME_CYCLE) 26 27 /* Ajustment to clock tick frequency to make timing come out right */ 28 #define FREQ_ADJUSTMENT 8 29 30 struct intel_scu_watchdog_dev { 31 ulong driver_open; 32 ulong driver_closed; 33 u32 timer_started; 34 u32 timer_set; 35 u32 threshold; 36 u32 soft_threshold; 37 u32 __iomem *timer_load_count_addr; 38 u32 __iomem *timer_current_value_addr; 39 u32 __iomem *timer_control_addr; 40 u32 __iomem *timer_clear_interrupt_addr; 41 u32 __iomem *timer_interrupt_status_addr; 42 struct sfi_timer_table_entry *timer_tbl_ptr; 43 struct notifier_block intel_scu_notifier; 44 struct miscdevice miscdev; 45 }; 46 47 extern int sfi_mtimer_num; 48 49 /* extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint); */ 50 #endif /* __INTEL_SCU_WATCHDOG_H */ 51