LXR linux/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/*
  21 * watchdog timer registers
  22 */
  23#define WDBC                    __SYSREGC(0xc0001000, u8) /* watchdog binary counter reg */
  24
  25#define WDCTR                   __SYSREG(0xc0001002, u8)  /* watchdog timer control reg */
  26#define WDCTR_WDCK              0x07    /* clock source selection */
  27#define WDCTR_WDCK_256th        0x00    /* - OSCI/256 */
  28#define WDCTR_WDCK_1024th       0x01    /* - OSCI/1024 */
  29#define WDCTR_WDCK_2048th       0x02    /* - OSCI/2048 */
  30#define WDCTR_WDCK_16384th      0x03    /* - OSCI/16384 */
  31#define WDCTR_WDCK_65536th      0x04    /* - OSCI/65536 */
  32#define WDCTR_WDRST             0x40    /* binary counter reset */
  33#define WDCTR_WDCNE             0x80    /* watchdog timer enable */
  34
  35#define RSTCTR                  __SYSREG(0xc0001004, u8) /* reset control reg */
  36#define RSTCTR_CHIPRST          0x01    /* chip reset */
  37#define RSTCTR_DBFRST           0x02    /* double fault reset flag */
  38#define RSTCTR_WDTRST           0x04    /* watchdog timer reset flag */
  39#define RSTCTR_WDREN            0x08    /* watchdog timer reset enable */
  40
  41#ifndef __ASSEMBLY__
  42
  43static inline void mn10300_proc_hard_reset(void)
  44{
  45        RSTCTR &= ~RSTCTR_CHIPRST;
  46        RSTCTR |= RSTCTR_CHIPRST;
  47}
  48
  49extern unsigned int watchdog_alert_counter[];
  50
  51extern void watchdog_go(void);
  52extern asmlinkage void watchdog_handler(void);
  53extern asmlinkage
  54void watchdog_interrupt(struct pt_regs *, enum exception_code);
  55
  56#endif
  57
  58#endif /* __KERNEL__ */
  59
  60#endif /* _ASM_RESET_REGS_H */
  61