1 /* MN10300 Reset controller and watchdog timer definitions 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11 12 #ifndef _ASM_RESET_REGS_H 13 #define _ASM_RESET_REGS_H 14 15 #include <asm/cpu-regs.h> 16 #include <asm/exceptions.h> 17 18 #ifdef __KERNEL__ 19 20 #ifdef CONFIG_MN10300_WD_TIMER 21 #define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */ 22 #endif 23 24 /* 25 * watchdog timer registers 26 */ 27 #define WDBC __SYSREGC(0xc0001000, u8) /* watchdog binary counter reg */ 28 29 #define WDCTR __SYSREG(0xc0001002, u8) /* watchdog timer control reg */ 30 #define WDCTR_WDCK 0x07 /* clock source selection */ 31 #define WDCTR_WDCK_256th 0x00 /* - OSCI/256 */ 32 #define WDCTR_WDCK_1024th 0x01 /* - OSCI/1024 */ 33 #define WDCTR_WDCK_2048th 0x02 /* - OSCI/2048 */ 34 #define WDCTR_WDCK_16384th 0x03 /* - OSCI/16384 */ 35 #define WDCTR_WDCK_65536th 0x04 /* - OSCI/65536 */ 36 #define WDCTR_WDRST 0x40 /* binary counter reset */ 37 #define WDCTR_WDCNE 0x80 /* watchdog timer enable */ 38 39 #define RSTCTR __SYSREG(0xc0001004, u8) /* reset control reg */ 40 #define RSTCTR_CHIPRST 0x01 /* chip reset */ 41 #define RSTCTR_DBFRST 0x02 /* double fault reset flag */ 42 #define RSTCTR_WDTRST 0x04 /* watchdog timer reset flag */ 43 #define RSTCTR_WDREN 0x08 /* watchdog timer reset enable */ 44 45 #ifndef __ASSEMBLY__ 46 mn10300_proc_hard_reset(void)47static inline void mn10300_proc_hard_reset(void) 48 { 49 RSTCTR &= ~RSTCTR_CHIPRST; 50 RSTCTR |= RSTCTR_CHIPRST; 51 } 52 53 extern unsigned int watchdog_alert_counter[]; 54 55 extern void watchdog_go(void); 56 extern asmlinkage void watchdog_handler(void); 57 extern asmlinkage 58 void watchdog_interrupt(struct pt_regs *, enum exception_code); 59 60 #endif 61 62 #endif /* __KERNEL__ */ 63 64 #endif /* _ASM_RESET_REGS_H */ 65