arch/blackfin/include/asm/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 /* Normally, we use ON, but you can't turn on software expansion until
  10  * interrupts subsystem is ready
  11  */
  12
  13 #define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
  14 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
  15 #define BFIN_TRACE_ON   (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
  16 #else
  17 #define BFIN_TRACE_ON   (BFIN_TRACE_INIT)
  18 #endif
  19
  20 #ifndef __ASSEMBLY__
  21 extern unsigned long trace_buff_offset;
  22 extern unsigned long software_trace_buff[];
  23
  24 /* Trace Macros for C files */
  25
  26 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
  27
  28 #define trace_buffer_save(x) \
  29         do { \
  30                 (x) = bfin_read_TBUFCTL(); \
  31                 bfin_write_TBUFCTL((x) & ~TBUFEN); \
  32         } while (0)
  33
  34 #define trace_buffer_restore(x) \
  35         do { \
  36                 bfin_write_TBUFCTL((x));        \
  37         } while (0)
  38 #else /* DEBUG_BFIN_HWTRACE_ON */
  39
  40 #define trace_buffer_save(x)
  41 #define trace_buffer_restore(x)
  42 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
  43
  44 #else
  45 /* Trace Macros for Assembly files */
  46
  47 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
  48
  49 #define trace_buffer_stop(preg, dreg)   \
  50         preg.L = LO(TBUFCTL);           \
  51         preg.H = HI(TBUFCTL);           \
  52         dreg = 0x1;                     \
  53         [preg] = dreg;
  54
  55 #define trace_buffer_init(preg, dreg) \
  56         preg.L = LO(TBUFCTL);         \
  57         preg.H = HI(TBUFCTL);         \
  58         dreg = BFIN_TRACE_INIT;       \
  59         [preg] = dreg;
  60
  61 #define trace_buffer_save(preg, dreg) \
  62         preg.L = LO(TBUFCTL); \
  63         preg.H = HI(TBUFCTL); \
  64         dreg = [preg]; \
  65         [--sp] = dreg; \
  66         dreg = 0x1; \
  67         [preg] = dreg;
  68
  69 #define trace_buffer_restore(preg, dreg) \
  70         preg.L = LO(TBUFCTL); \
  71         preg.H = HI(TBUFCTL); \
  72         dreg = [sp++]; \
  73         [preg] = dreg;
  74
  75 #else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
  76
  77 #define trace_buffer_stop(preg, dreg)
  78 #define trace_buffer_init(preg, dreg)
  79 #define trace_buffer_save(preg, dreg)
  80 #define trace_buffer_restore(preg, dreg)
  81
  82 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
  83
  84 #ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
  85 # define DEBUG_HWTRACE_SAVE(preg, dreg)    trace_buffer_save(preg, dreg)
  86 # define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
  87 #else
  88 # define DEBUG_HWTRACE_SAVE(preg, dreg)
  89 # define DEBUG_HWTRACE_RESTORE(preg, dreg)
  90 #endif
  91
  92 #endif /* __ASSEMBLY__ */
  93
  94 #endif                          /* _BLACKFIN_TRACE_ */