1 files changed, 70 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h
new file mode 100644
index 000000000..133672744
--- /dev/null
+++ b/arch/powerpc/include/asm/cputime.h
@@ -0,0 +1,70 @@
+/*
+ * Definitions for measuring cputime on powerpc machines.
+ *
+ * Copyright (C) 2006 Paul Mackerras, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in
+ * the same units as the timebase.  Otherwise we measure cpu time
+ * in jiffies using the generic definitions.
+ */
+
+#ifndef __POWERPC_CPUTIME_H
+#define __POWERPC_CPUTIME_H
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+
+#include <linux/types.h>
+#include <linux/time.h>
+#include <asm/div64.h>
+#include <asm/time.h>
+#include <asm/param.h>
+
+typedef u64 __nocast cputime_t;
+typedef u64 __nocast cputime64_t;
+
+#define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
+
+#ifdef __KERNEL__
+/*
+ * Convert cputime <-> microseconds
+ */
+extern u64 __cputime_usec_factor;
+
+static inline unsigned long cputime_to_usecs(const cputime_t ct)
+{
+	return mulhdu((__force u64) ct, __cputime_usec_factor);
+}
+
+/*
+ * PPC64 uses PACA which is task independent for storing accounting data while
+ * PPC32 uses struct thread_info, therefore at task switch the accounting data
+ * has to be populated in the new task
+ */
+#ifdef CONFIG_PPC64
+#define get_accounting(tsk)	(&get_paca()->accounting)
+static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
+#else
+#define get_accounting(tsk)	(&task_thread_info(tsk)->accounting)
+/*
+ * Called from the context switch with interrupts disabled, to charge all
+ * accumulated times to the current process, and to prepare accounting on
+ * the next process.
+ */
+static inline void arch_vtime_task_switch(struct task_struct *prev)
+{
+	struct cpu_accounting_data *acct = get_accounting(current);
+	struct cpu_accounting_data *acct0 = get_accounting(prev);
+
+	acct->starttime = acct0->starttime;
+	acct->startspurr = acct0->startspurr;
+}
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
+#endif /* __POWERPC_CPUTIME_H */