| #ifndef _ASM_POWERPC_TIMEX_H |
| #define _ASM_POWERPC_TIMEX_H |
| |
| #ifdef __KERNEL__ |
| |
| /* |
| * PowerPC architecture timex specifications |
| */ |
| |
| #include <asm/cputable.h> |
| #include <asm/reg.h> |
| |
| #define CLOCK_TICK_RATE 1024000 /* Underlying HZ */ |
| |
| typedef unsigned long cycles_t; |
| |
| static inline cycles_t get_cycles(void) |
| { |
| #ifdef __powerpc64__ |
| return mftb(); |
| #else |
| cycles_t ret; |
| |
| /* |
| * For the "cycle" counter we use the timebase lower half. |
| * Currently only used on SMP. |
| */ |
| |
| ret = 0; |
| |
| __asm__ __volatile__( |
| "97: mfspr %0, %2\n" |
| "99:\n" |
| ".section __ftr_fixup,\"a\"\n" |
| ".align 2\n" |
| "98:\n" |
| " .long %1\n" |
| " .long 0\n" |
| " .long 97b-98b\n" |
| " .long 99b-98b\n" |
| " .long 0\n" |
| " .long 0\n" |
| ".previous" |
| : "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL)); |
| return ret; |
| #endif |
| } |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_TIMEX_H */ |
