/*

   * header file for hardware trace functions

   *

   * Copyright 2007-2008 Analog Devices Inc.
   *
   * Licensed under the GPL-2 or later.

   */
  
  #ifndef _BLACKFIN_TRACE_
  #define _BLACKFIN_TRACE_

  /* Normally, we use ON, but you can't turn on software expansion until
   * interrupts subsystem is ready
   */
  
  #define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
  #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
  #define BFIN_TRACE_ON   (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
  #else
  #define BFIN_TRACE_ON   (BFIN_TRACE_INIT)
  #endif

  #ifndef __ASSEMBLY__

  extern unsigned long trace_buff_offset;
  extern unsigned long software_trace_buff[];

  #if defined(CONFIG_DEBUG_VERBOSE)

  extern void decode_address(char *buf, unsigned long address);

  extern bool get_instruction(unsigned int *val, unsigned short *address);

  #else

  static inline void decode_address(char *buf, unsigned long address) { }
  static inline bool get_instruction(unsigned int *val, unsigned short *address) { return false; }

  #endif

  /* Trace Macros for C files */

  #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON

  #define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT)

  #define trace_buffer_save(x) \

  	do { \
  		(x) = bfin_read_TBUFCTL(); \
  		bfin_write_TBUFCTL((x) & ~TBUFEN); \
  	} while (0)

  
  #define trace_buffer_restore(x) \

  	do { \
  		bfin_write_TBUFCTL((x));        \
  	} while (0)
  #else /* DEBUG_BFIN_HWTRACE_ON */
  
  #define trace_buffer_save(x)
  #define trace_buffer_restore(x)
  #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */

  
  #else
  /* Trace Macros for Assembly files */

  #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON

  #define trace_buffer_stop(preg, dreg)	\
  	preg.L = LO(TBUFCTL);		\
  	preg.H = HI(TBUFCTL);		\
  	dreg = 0x1;			\
  	[preg] = dreg;

  #define trace_buffer_init(preg, dreg) \
  	preg.L = LO(TBUFCTL);         \
  	preg.H = HI(TBUFCTL);         \
  	dreg = BFIN_TRACE_INIT;       \

  	[preg] = dreg;

  #define trace_buffer_save(preg, dreg) \
  	preg.L = LO(TBUFCTL); \
  	preg.H = HI(TBUFCTL); \
  	dreg = [preg]; \

  	[--sp] = dreg; \

  	dreg = 0x1; \
  	[preg] = dreg;
  
  #define trace_buffer_restore(preg, dreg) \
  	preg.L = LO(TBUFCTL); \
  	preg.H = HI(TBUFCTL); \

  	dreg = [sp++]; \

  	[preg] = dreg;

  #else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
  
  #define trace_buffer_stop(preg, dreg)

  #define trace_buffer_init(preg, dreg)

  #define trace_buffer_save(preg, dreg)
  #define trace_buffer_restore(preg, dreg)

  
  #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */

  #ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE

  # define DEBUG_HWTRACE_SAVE(preg, dreg)    trace_buffer_save(preg, dreg)
  # define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)

  #else

  # define DEBUG_HWTRACE_SAVE(preg, dreg)
  # define DEBUG_HWTRACE_RESTORE(preg, dreg)

  #endif
  
  #endif /* __ASSEMBLY__ */
  
  #endif				/* _BLACKFIN_TRACE_ */