include/asm-blackfin/trace.h

   1 /*
   2  * Common header file for blackfin family of processors.
   3  *
   4  */
   5
   6 #ifndef _BLACKFIN_TRACE_
   7 #define _BLACKFIN_TRACE_
   8
   9 #ifndef __ASSEMBLY__
  10 /* Trace Macros for C files */
  11
  12 #define trace_buffer_save(x) \
  13         do { \
  14                 (x) = bfin_read_TBUFCTL(); \
  15                 bfin_write_TBUFCTL((x) & ~TBUFEN); \
  16         } while (0)
  17
  18 #define trace_buffer_restore(x) \
  19         do { \
  20                 bfin_write_TBUFCTL((x));        \
  21         } while (0)
  22
  23 #else
  24 /* Trace Macros for Assembly files */
  25
  26 #define TRACE_BUFFER_START(preg, dreg) trace_buffer_start(preg, dreg)
  27 #define TRACE_BUFFER_STOP(preg, dreg)  trace_buffer_stop(preg, dreg)
  28
  29 #define trace_buffer_stop(preg, dreg)   \
  30         preg.L = LO(TBUFCTL);           \
  31         preg.H = HI(TBUFCTL);           \
  32         dreg = 0x1;                     \
  33         [preg] = dreg;
  34
  35 #define trace_buffer_start(preg, dreg) \
  36         preg.L = LO(TBUFCTL);           \
  37         preg.H = HI(TBUFCTL);           \
  38         dreg = 0x13;                    \
  39         [preg] = dreg;
  40
  41 #ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
  42 # define DEBUG_START_HWTRACE(preg, dreg) trace_buffer_start(preg, dreg)
  43 # define DEBUG_STOP_HWTRACE(preg, dreg) trace_buffer_stop(preg, dreg)
  44
  45 #else
  46 # define DEBUG_START_HWTRACE(preg, dreg)
  47 # define DEBUG_STOP_HWTRACE(preg, dreg)
  48 #endif
  49
  50 #endif /* __ASSEMBLY__ */
  51
  52 #endif                          /* _BLACKFIN_TRACE_ */