#include <common.h>
  #include <asm/processor.h>
  #include <memio.h>
  #include <linux/ctype.h>
  
  static __inline__ unsigned long
  get_msr(void)
  {
  	unsigned long msr;
  
  	asm volatile("mfmsr %0" : "=r" (msr) :);
  	return msr;
  }
  
  static __inline__ void
  set_msr(unsigned long msr)
  {

  	asm volatile("mtmsr %0" : : "r" (msr));

  }
  
  static __inline__ unsigned long
  get_dec(void)
  {
  	unsigned long val;
  
  	asm volatile("mfdec %0" : "=r" (val) :);
  	return val;
  }
  
  
  static __inline__ void
  set_dec(unsigned long val)
  {

  	asm volatile("mtdec %0" : : "r" (val));

  }
  
  
  void
  enable_interrupts(void)
  {
      set_msr (get_msr() | MSR_EE);
  }
  
  /* returns flag if MSR_EE was set before */
  int
  disable_interrupts(void)
  {
      ulong msr;
  
      msr = get_msr();
      set_msr (msr & ~MSR_EE);
      return ((msr & MSR_EE) != 0);
  }
  
  u8 in8(u32 port)
  {
      return in_byte(port);
  }
  
  void out8(u32 port, u8 val)
  {
      out_byte(port, val);
  }
  
  unsigned long in32(u32 port)
  {
      return in_long(port);
  }
  
  unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
  {

  	unsigned long result = 0,value;
  
  	if (*cp == '0') {
  		cp++;
  		if ((*cp == 'x') && isxdigit(cp[1])) {
  			base = 16;
  			cp++;
  		}
  		if (!base) {
  			base = 8;
  		}
  	}
  	if (!base) {
  		base = 10;
  	}
  	while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
  	    ? toupper(*cp) : *cp)-'A'+10) < base) {
  		result = result*base + value;
  		cp++;
  	}
  	if (endp)
  		*endp = (char *)cp;
  	return result;

  }
  
  long simple_strtol(const char *cp,char **endp,unsigned int base)
  {

  	if(*cp=='-')
  		return -simple_strtoul(cp+1,endp,base);
  	return simple_strtoul(cp,endp,base);

  }
  
  static inline void
  soft_restart(unsigned long addr)
  {

  	/* SRR0 has system reset vector, SRR1 has default MSR value */
  	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */

  	__asm__ __volatile__ ("mtspr    26, %0"         :: "r" (addr));
  	__asm__ __volatile__ ("li       4, (1 << 6)"    ::: "r4");
  	__asm__ __volatile__ ("mtspr    27, 4");
  	__asm__ __volatile__ ("rfi");

  	while(1);       /* not reached */

  }
  
  void
  do_reset (void)
  {

  	ulong addr;
  	/* flush and disable I/D cache */
  	__asm__ __volatile__ ("mfspr    3, 1008"        ::: "r3");
  	__asm__ __volatile__ ("ori      5, 5, 0xcc00"   ::: "r5");
  	__asm__ __volatile__ ("ori      4, 3, 0xc00"    ::: "r4");
  	__asm__ __volatile__ ("andc     5, 3, 5"        ::: "r5");
  	__asm__ __volatile__ ("sync");
  	__asm__ __volatile__ ("mtspr    1008, 4");
  	__asm__ __volatile__ ("isync");
  	__asm__ __volatile__ ("sync");
  	__asm__ __volatile__ ("mtspr    1008, 5");
  	__asm__ __volatile__ ("isync");
  	__asm__ __volatile__ ("sync");

  #ifdef CONFIG_SYS_RESET_ADDRESS
  	addr = CONFIG_SYS_RESET_ADDRESS;

  #else

  	/*

  	 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
  	 * CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid

  	 * address. Better pick an address known to be invalid on your

  	 * system and assign it to CONFIG_SYS_RESET_ADDRESS.

  	 */

  	addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);

  #endif

  	soft_restart(addr);
  	while(1);       /* not reached */

  }