projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| c6622f63 PM |
1 | /* |
| 2 | * Definitions for measuring cputime on powerpc machines. | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Paul Mackerras, IBM Corp. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the License, or (at your option) any later version. | |
| 10 | * | |
| abf917cd | 11 | * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in |
| c6622f63 PM |
12 | * the same units as the timebase. Otherwise we measure cpu time |
| 13 | * in jiffies using the generic definitions. | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef __POWERPC_CPUTIME_H | |
| 17 | #define __POWERPC_CPUTIME_H | |
| 18 | ||
| b672592f | 19 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
| c6622f63 PM |
20 | |
| 21 | #include <linux/types.h> | |
| 22 | #include <linux/time.h> | |
| 23 | #include <asm/div64.h> | |
| 24 | #include <asm/time.h> | |
| 25 | #include <asm/param.h> | |
| 26 | ||
| 64861634 MS |
27 | typedef u64 __nocast cputime_t; |
| 28 | typedef u64 __nocast cputime64_t; | |
| c6622f63 | 29 | |
| 347abad9 RR |
30 | #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new) |
| 31 | ||
| c6622f63 | 32 | #ifdef __KERNEL__ |
| c6622f63 | 33 | /* |
| d57af9b2 | 34 | * Convert cputime <-> microseconds |
| c6622f63 | 35 | */ |
| 9f5072d4 | 36 | extern u64 __cputime_usec_factor; |
| c6622f63 | 37 | |
| d57af9b2 | 38 | static inline unsigned long cputime_to_usecs(const cputime_t ct) |
| c6622f63 | 39 | { |
| e4e88f31 | 40 | return mulhdu((__force u64) ct, __cputime_usec_factor); |
| c6622f63 PM |
41 | } |
| 42 | ||
| c223c903 CL |
43 | /* |
| 44 | * PPC64 uses PACA which is task independent for storing accounting data while | |
| 45 | * PPC32 uses struct thread_info, therefore at task switch the accounting data | |
| 46 | * has to be populated in the new task | |
| 47 | */ | |
| 48 | #ifdef CONFIG_PPC64 | |
| 60f1d289 | 49 | #define get_accounting(tsk) (&get_paca()->accounting) |
| e3942ba0 | 50 | static inline void arch_vtime_task_switch(struct task_struct *tsk) { } |
| c223c903 | 51 | #else |
| 60f1d289 CL |
52 | #define get_accounting(tsk) (&task_thread_info(tsk)->accounting) |
| 53 | /* | |
| 54 | * Called from the context switch with interrupts disabled, to charge all | |
| 55 | * accumulated times to the current process, and to prepare accounting on | |
| 56 | * the next process. | |
| 57 | */ | |
| 58 | static inline void arch_vtime_task_switch(struct task_struct *prev) | |
| 59 | { | |
| 60 | struct cpu_accounting_data *acct = get_accounting(current); | |
| 61 | struct cpu_accounting_data *acct0 = get_accounting(prev); | |
| 62 | ||
| 63 | acct->starttime = acct0->starttime; | |
| 60f1d289 | 64 | } |
| c223c903 | 65 | #endif |
| e3942ba0 | 66 | |
| c6622f63 | 67 | #endif /* __KERNEL__ */ |
| abf917cd | 68 | #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |
| c6622f63 | 69 | #endif /* __POWERPC_CPUTIME_H */ |