projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| dd56fdf2 | 1 | #ifndef _ASM_POWERPC_TIMEX_H |
| 2 | #define _ASM_POWERPC_TIMEX_H | |
| 3 | ||
| 4 | #ifdef __KERNEL__ | |
| 5 | ||
| 1da177e4 | 6 | /* |
| dd56fdf2 | 7 | * PowerPC architecture timex specifications |
| 1da177e4 | 8 | */ |
| 1da177e4 LT |
9 | |
| 10 | #include <linux/config.h> | |
| 11 | #include <asm/cputable.h> | |
| 12 | ||
| cbd27b8c | 13 | #define CLOCK_TICK_RATE 1024000 /* Underlying HZ */ |
| 1da177e4 LT |
14 | |
| 15 | typedef unsigned long cycles_t; | |
| 16 | ||
| 1da177e4 LT |
17 | static inline cycles_t get_cycles(void) |
| 18 | { | |
| dd56fdf2 | 19 | cycles_t ret; |
| 20 | ||
| 21 | #ifdef __powerpc64__ | |
| 22 | ||
| 23 | __asm__ __volatile__("mftb %0" : "=r" (ret) : ); | |
| 24 | ||
| 25 | #else | |
| 26 | /* | |
| 27 | * For the "cycle" counter we use the timebase lower half. | |
| 28 | * Currently only used on SMP. | |
| 29 | */ | |
| 30 | ||
| 31 | ret = 0; | |
| 1da177e4 LT |
32 | |
| 33 | __asm__ __volatile__( | |
| 34 | "98: mftb %0\n" | |
| 35 | "99:\n" | |
| 36 | ".section __ftr_fixup,\"a\"\n" | |
| 37 | " .long %1\n" | |
| 38 | " .long 0\n" | |
| 39 | " .long 98b\n" | |
| 40 | " .long 99b\n" | |
| 41 | ".previous" | |
| 42 | : "=r" (ret) : "i" (CPU_FTR_601)); | |
| dd56fdf2 | 43 | #endif |
| 44 | ||
| 1da177e4 LT |
45 | return ret; |
| 46 | } | |
| 47 | ||
| dd56fdf2 | 48 | #endif /* __KERNEL__ */ |
| 49 | #endif /* _ASM_POWERPC_TIMEX_H */ |