1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2001 4 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. 5 */ 6 7 /* 8 * Watchdog functions and macros. 9 */ 10 #ifndef _WATCHDOG_H_ 11 #define _WATCHDOG_H_ 12 13 #if !defined(__ASSEMBLY__) 14 /* 15 * Reset the watchdog timer, always returns 0 16 * 17 * This function is here since it is shared between board_f() and board_r(), 18 * and the legacy arch/<arch>/board.c code. 19 */ 20 int init_func_watchdog_reset(void); 21 #endif 22 23 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG) 24 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init, 25 #define INIT_FUNC_WATCHDOG_RESET init_func_watchdog_reset, 26 #else 27 #define INIT_FUNC_WATCHDOG_INIT 28 #define INIT_FUNC_WATCHDOG_RESET 29 #endif 30 31 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG) 32 # error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together." 33 #endif 34 35 /* 36 * Hardware watchdog 37 */ 38 #ifdef CONFIG_HW_WATCHDOG 39 #if defined(__ASSEMBLY__) 40 #define WATCHDOG_RESET bl hw_watchdog_reset 41 #else 42 extern void hw_watchdog_reset(void); 43 44 #define WATCHDOG_RESET hw_watchdog_reset 45 #endif /* __ASSEMBLY__ */ 46 #else 47 /* 48 * Maybe a software watchdog? 49 */ 50 #if defined(CONFIG_WATCHDOG) 51 #if defined(__ASSEMBLY__) 52 #define WATCHDOG_RESET bl watchdog_reset 53 #else 54 /* Don't require the watchdog to be enabled in SPL */ 55 #if defined(CONFIG_SPL_BUILD) && \ 56 !defined(CONFIG_SPL_WATCHDOG_SUPPORT) 57 #define WATCHDOG_RESET() {} 58 #else 59 extern void watchdog_reset(void); 60 61 #define WATCHDOG_RESET watchdog_reset 62 #endif 63 #endif 64 #else 65 /* 66 * No hardware or software watchdog. 67 */ 68 #if defined(__ASSEMBLY__) 69 #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/ 70 #else 71 #define WATCHDOG_RESET() {} 72 #endif /* __ASSEMBLY__ */ 73 #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */ 74 #endif /* CONFIG_HW_WATCHDOG */ 75 76 /* 77 * Prototypes from $(CPU)/cpu.c. 78 */ 79 80 #if (defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)) && !defined(__ASSEMBLY__) 81 void hw_watchdog_init(void); 82 #endif 83 84 #if defined(CONFIG_MPC85xx) && !defined(__ASSEMBLY__) 85 void init_85xx_watchdog(void); 86 #endif 87 #endif /* _WATCHDOG_H_ */ 88