projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| dd56fdf2 | 2 | #ifndef _ASM_POWERPC_TIMEX_H |
| 3 | #define _ASM_POWERPC_TIMEX_H | |
| 4 | ||
| 5 | #ifdef __KERNEL__ | |
| 6 | ||
| 1da177e4 | 7 | /* |
| dd56fdf2 | 8 | * PowerPC architecture timex specifications |
| 1da177e4 | 9 | */ |
| 1da177e4 | 10 | |
| 1da177e4 | 11 | #include <asm/cputable.h> |
| 859deea9 | 12 | #include <asm/reg.h> |
| 1da177e4 | 13 | |
| cbd27b8c | 14 | #define CLOCK_TICK_RATE 1024000 /* Underlying HZ */ |
| 1da177e4 LT |
15 | |
| 16 | typedef unsigned long cycles_t; | |
| 17 | ||
| 1da177e4 LT |
18 | static inline cycles_t get_cycles(void) |
| 19 | { | |
| dd56fdf2 | 20 | #ifdef __powerpc64__ |
| 859deea9 | 21 | return mftb(); |
| dd56fdf2 | 22 | #else |
| 859deea9 BH |
23 | cycles_t ret; |
| 24 | ||
| dd56fdf2 | 25 | /* |
| 26 | * For the "cycle" counter we use the timebase lower half. | |
| 27 | * Currently only used on SMP. | |
| 28 | */ | |
| 29 | ||
| 30 | ret = 0; | |
| 1da177e4 LT |
31 | |
| 32 | __asm__ __volatile__( | |
| 968159c0 | 33 | #ifdef CONFIG_PPC_8xx |
| ae2163be LC |
34 | "97: mftb %0\n" |
| 35 | #else | |
| beb2dc0a | 36 | "97: mfspr %0, %2\n" |
| ae2163be | 37 | #endif |
| 1da177e4 LT |
38 | "99:\n" |
| 39 | ".section __ftr_fixup,\"a\"\n" | |
| 0909c8c2 BH |
40 | ".align 2\n" |
| 41 | "98:\n" | |
| 1da177e4 LT |
42 | " .long %1\n" |
| 43 | " .long 0\n" | |
| 0909c8c2 BH |
44 | " .long 97b-98b\n" |
| 45 | " .long 99b-98b\n" | |
| fac23fe4 ME |
46 | " .long 0\n" |
| 47 | " .long 0\n" | |
| 1da177e4 | 48 | ".previous" |
| beb2dc0a | 49 | : "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL)); |
| 1da177e4 | 50 | return ret; |
| 859deea9 | 51 | #endif |
| 1da177e4 LT |
52 | } |
| 53 | ||
| dd56fdf2 | 54 | #endif /* __KERNEL__ */ |
| 55 | #endif /* _ASM_POWERPC_TIMEX_H */ |