1 /* 2 * (C) Copyright 2001 3 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * Watchdog functions and macros. 26 */ 27 #ifndef _WATCHDOG_H_ 28 #define _WATCHDOG_H_ 29 30 #if !defined(__ASSEMBLY__) 31 /* 32 * Reset the watchdog timer, always returns 0 33 * 34 * This function is here since it is shared between board_f() and board_r(), 35 * and the legacy arch/<arch>/board.c code. 36 */ 37 int init_func_watchdog_reset(void); 38 #endif 39 40 #ifdef CONFIG_WATCHDOG 41 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init, 42 #define INIT_FUNC_WATCHDOG_RESET init_func_watchdog_reset, 43 #else 44 #define INIT_FUNC_WATCHDOG_INIT 45 #define INIT_FUNC_WATCHDOG_RESET 46 #endif 47 48 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG) 49 # error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together." 50 #endif 51 52 /* 53 * Hardware watchdog 54 */ 55 #ifdef CONFIG_HW_WATCHDOG 56 #if defined(__ASSEMBLY__) 57 #define WATCHDOG_RESET bl hw_watchdog_reset 58 #else 59 extern void hw_watchdog_reset(void); 60 61 #define WATCHDOG_RESET hw_watchdog_reset 62 #endif /* __ASSEMBLY__ */ 63 #else 64 /* 65 * Maybe a software watchdog? 66 */ 67 #if defined(CONFIG_WATCHDOG) 68 #if defined(__ASSEMBLY__) 69 #define WATCHDOG_RESET bl watchdog_reset 70 #else 71 extern void watchdog_reset(void); 72 73 #define WATCHDOG_RESET watchdog_reset 74 #endif 75 #else 76 /* 77 * No hardware or software watchdog. 78 */ 79 #if defined(__ASSEMBLY__) 80 #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/ 81 #else 82 #define WATCHDOG_RESET() {} 83 #endif /* __ASSEMBLY__ */ 84 #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */ 85 #endif /* CONFIG_HW_WATCHDOG */ 86 87 /* 88 * Prototypes from $(CPU)/cpu.c. 89 */ 90 91 /* MPC 8xx */ 92 #if (defined(CONFIG_8xx) || defined(CONFIG_MPC860)) && !defined(__ASSEMBLY__) 93 void reset_8xx_watchdog(volatile immap_t *immr); 94 #endif 95 96 /* MPC 5xx */ 97 #if defined(CONFIG_5xx) && !defined(__ASSEMBLY__) 98 void reset_5xx_watchdog(volatile immap_t *immr); 99 #endif 100 101 /* MPC 5xxx */ 102 #if defined(CONFIG_MPC5xxx) && !defined(__ASSEMBLY__) 103 void reset_5xxx_watchdog(void); 104 #endif 105 106 /* AMCC 4xx */ 107 #if defined(CONFIG_4xx) && !defined(__ASSEMBLY__) 108 void reset_4xx_watchdog(void); 109 #endif 110 111 /* Freescale i.MX */ 112 #if defined(CONFIG_IMX_WATCHDOG) && !defined(__ASSEMBLY__) 113 void hw_watchdog_init(void); 114 #endif 115 #endif /* _WATCHDOG_H_ */ 116