arch/mn10300/include/asm/reset-regs.h

   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
  47 static 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 */