1 /* 2 * (C) Copyright 2001 3 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * Watchdog functions and macros. 10 */ 11 #ifndef _WATCHDOG_H_ 12 #define _WATCHDOG_H_ 13 14 #if !defined(__ASSEMBLY__) 15 /* 16 * Reset the watchdog timer, always returns 0 17 * 18 * This function is here since it is shared between board_f() and board_r(), 19 * and the legacy arch/<arch>/board.c code. 20 */ 21 int init_func_watchdog_reset(void); 22 #endif 23 24 #if defined(CONFIG_SYS_GENERIC_BOARD) && \ 25 (defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)) 26 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init, 27 #define INIT_FUNC_WATCHDOG_RESET init_func_watchdog_reset, 28 #else 29 #define INIT_FUNC_WATCHDOG_INIT 30 #define INIT_FUNC_WATCHDOG_RESET 31 #endif 32 33 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG) 34 # error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together." 35 #endif 36 37 /* 38 * Hardware watchdog 39 */ 40 #ifdef CONFIG_HW_WATCHDOG 41 #if defined(__ASSEMBLY__) 42 #define WATCHDOG_RESET bl hw_watchdog_reset 43 #else 44 extern void hw_watchdog_reset(void); 45 46 #define WATCHDOG_RESET hw_watchdog_reset 47 #endif /* __ASSEMBLY__ */ 48 #else 49 /* 50 * Maybe a software watchdog? 51 */ 52 #if defined(CONFIG_WATCHDOG) 53 #if defined(__ASSEMBLY__) 54 #define WATCHDOG_RESET bl watchdog_reset 55 #else 56 extern void watchdog_reset(void); 57 58 #define WATCHDOG_RESET watchdog_reset 59 #endif 60 #else 61 /* 62 * No hardware or software watchdog. 63 */ 64 #if defined(__ASSEMBLY__) 65 #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/ 66 #else 67 #define WATCHDOG_RESET() {} 68 #endif /* __ASSEMBLY__ */ 69 #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */ 70 #endif /* CONFIG_HW_WATCHDOG */ 71 72 /* 73 * Prototypes from $(CPU)/cpu.c. 74 */ 75 76 /* MPC 8xx */ 77 #if (defined(CONFIG_8xx) || defined(CONFIG_MPC860)) && !defined(__ASSEMBLY__) 78 void reset_8xx_watchdog(volatile immap_t *immr); 79 #endif 80 81 /* MPC 5xx */ 82 #if defined(CONFIG_5xx) && !defined(__ASSEMBLY__) 83 void reset_5xx_watchdog(volatile immap_t *immr); 84 #endif 85 86 /* MPC 5xxx */ 87 #if defined(CONFIG_MPC5xxx) && !defined(__ASSEMBLY__) 88 void reset_5xxx_watchdog(void); 89 #endif 90 91 /* AMCC 4xx */ 92 #if defined(CONFIG_4xx) && !defined(__ASSEMBLY__) 93 void reset_4xx_watchdog(void); 94 #endif 95 96 #if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__) 97 void hw_watchdog_init(void); 98 #endif 99 100 #if defined(CONFIG_MPC85xx) && !defined(__ASSEMBLY__) 101 void init_85xx_watchdog(void); 102 #endif 103 #endif /* _WATCHDOG_H_ */ 104