trunk/obsolete/ltt-usertrace/ltt/timex-ppc.h

   1 #ifndef __TIMEX_PPC_H
   2 #define __TIMEX_PPC_H
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #define CPU_FTR_601                     0x00000100
   9
  10 #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
  11
  12 typedef uint64_t cycles_t;
  13
  14 /* On ppc64 this gets us the whole timebase; on ppc32 just the lower half */
  15 static inline unsigned long get_tbl(void)
  16 {
  17         unsigned long tbl;
  18
  19 //#if defined(CONFIG_403GCX)
  20 //      asm volatile("mfspr %0, 0x3dd" : "=r" (tbl));
  21 //#else
  22         asm volatile("mftb %0" : "=r" (tbl));
  23 //#endif
  24         return tbl;
  25 }
  26
  27 static inline unsigned int get_tbu(void)
  28 {
  29         unsigned int tbu;
  30
  31 //#if defined(CONFIG_403GCX)
  32 //      asm volatile("mfspr %0, 0x3dc" : "=r" (tbu));
  33 //#else
  34         asm volatile("mftbu %0" : "=r" (tbu));
  35 //#endif
  36         return tbu;
  37 }
  38
  39 static inline uint64_t get_tb(void)
  40 {
  41         unsigned int tbhi, tblo, tbhi2;
  42
  43         do {
  44                 tbhi = get_tbu();
  45                 tblo = get_tbl();
  46                 tbhi2 = get_tbu();
  47         } while (tbhi != tbhi2);
  48
  49         return ((uint64_t)tbhi << 32) | tblo;
  50 }
  51
  52 static inline cycles_t get_cycles(void)
  53 {
  54         return get_tb();
  55 }
  56
  57 #ifdef __cplusplus
  58 } /* end of extern "C" */
  59 #endif
  60
  61 #endif //__TIMEX_PPC_H