ltt-usertrace/ltt/timex-ppc.h

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