ltt-usertrace/ltt/ltt-usertrace-ppc.h

   1 /*
   2  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   3  */
   4 #ifndef __LTT_USERTRACE_PPC_H
   5 #define __LTT_USERTRACE_PPC_H
   6
   7 #ifdef __powerpc64__
   8 #include "ltt/atomic-ppc64.h"
   9 #include "ltt/system-ppc64.h"
  10 #else
  11 #include "ltt/ppc_asm-ppc.h"
  12 #include "ltt/atomic-ppc.h"
  13 #include "ltt/system-ppc.h"
  14 #endif
  15
  16 #define CPU_FTR_601                     0x00000100
  17
  18 #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
  19
  20 typedef uint64_t cycles_t;
  21
  22 /* On ppc64 this gets us the whole timebase; on ppc32 just the lower half */
  23 static inline unsigned long get_tbl(void)
  24 {
  25         unsigned long tbl;
  26
  27 //#if defined(CONFIG_403GCX)
  28 //      asm volatile("mfspr %0, 0x3dd" : "=r" (tbl));
  29 //#else
  30         asm volatile("mftb %0" : "=r" (tbl));
  31 //#endif
  32         return tbl;
  33 }
  34
  35 static inline unsigned int get_tbu(void)
  36 {
  37         unsigned int tbu;
  38
  39 //#if defined(CONFIG_403GCX)
  40 //      asm volatile("mfspr %0, 0x3dc" : "=r" (tbu));
  41 //#else
  42         asm volatile("mftbu %0" : "=r" (tbu));
  43 //#endif
  44         return tbu;
  45 }
  46
  47
  48 #ifdef __powerpc64__
  49 static inline uint64_t get_tb(void)
  50 {
  51         return mftb();
  52 }
  53 #else
  54 static inline uint64_t get_tb(void)
  55 {
  56         unsigned int tbhi, tblo, tbhi2;
  57
  58         do {
  59                 tbhi = get_tbu();
  60                 tblo = get_tbl();
  61                 tbhi2 = get_tbu();
  62         } while (tbhi != tbhi2);
  63
  64         return ((uint64_t)tbhi << 32) | tblo;
  65 }
  66 #endif
  67
  68 static inline cycles_t get_cycles(void)
  69 {
  70         return get_tb();
  71 }
  72
  73
  74 #endif /* __LTT_USERTRACE_PPC_H */