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 | 9 | |
| 1da177e4 | 10 | #include <asm/cputable.h> |
| 859deea9 | 11 | #include <asm/reg.h> |
| 1da177e4 | 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 | #ifdef __powerpc64__ |
| 859deea9 | 20 | return mftb(); |
| dd56fdf2 | 21 | #else |
| 859deea9 BH |
22 | cycles_t ret; |
| 23 | ||
| dd56fdf2 | 24 | /* |
| 25 | * For the "cycle" counter we use the timebase lower half. | |
| 26 | * Currently only used on SMP. | |
| 27 | */ | |
| 28 | ||
| 29 | ret = 0; | |
| 1da177e4 LT |
30 | |
| 31 | __asm__ __volatile__( | |
| ae2163be LC |
32 | #ifdef CONFIG_8xx |
| 33 | "97: mftb %0\n" | |
| 34 | #else | |
| beb2dc0a | 35 | "97: mfspr %0, %2\n" |
| ae2163be | 36 | #endif |
| 1da177e4 LT |
37 | "99:\n" |
| 38 | ".section __ftr_fixup,\"a\"\n" | |
| 0909c8c2 BH |
39 | ".align 2\n" |
| 40 | "98:\n" | |
| 1da177e4 LT |
41 | " .long %1\n" |
| 42 | " .long 0\n" | |
| 0909c8c2 BH |
43 | " .long 97b-98b\n" |
| 44 | " .long 99b-98b\n" | |
| fac23fe4 ME |
45 | " .long 0\n" |
| 46 | " .long 0\n" | |
| 1da177e4 | 47 | ".previous" |
| ae2163be LC |
48 | #ifdef CONFIG_8xx |
| 49 | : "=r" (ret) : "i" (CPU_FTR_601)); | |
| 50 | #else | |
| beb2dc0a | 51 | : "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL)); |
| ae2163be | 52 | #endif |
| 1da177e4 | 53 | return ret; |
| 859deea9 | 54 | #endif |
| 1da177e4 LT |
55 | } |
| 56 | ||
| dd56fdf2 | 57 | #endif /* __KERNEL__ */ |
| 58 | #endif /* _ASM_POWERPC_TIMEX_H */ |