X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-powerpc%2Fcputime.h;h=f42e623030eece0edb4a8f30c37db795c44f2395;hb=f1ba12856b7a7d43e495e216bc91e6bbf7aac383;hp=a21185d478830365eaa8fc2d8085f31c76f35ad7;hpb=c6622f63db86fcbd41bf6fe05ddf2e00c1e51ced;p=linux-2.6

diff --git a/include/asm-powerpc/cputime.h b/include/asm-powerpc/cputime.h
index a21185d478..f42e623030 100644
--- a/include/asm-powerpc/cputime.h
+++ b/include/asm-powerpc/cputime.h
@@ -43,6 +43,7 @@ typedef u64 cputime64_t;
 
 #define cputime64_zero			((cputime64_t)0)
 #define cputime64_add(__a, __b)		((__a) + (__b))
+#define cputime64_sub(__a, __b)		((__a) - (__b))
 #define cputime_to_cputime64(__ct)	(__ct)
 
 #ifdef __KERNEL__
@@ -51,12 +52,26 @@ typedef u64 cputime64_t;
  * Convert cputime <-> jiffies
  */
 extern u64 __cputime_jiffies_factor;
+DECLARE_PER_CPU(unsigned long, cputime_last_delta);
+DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
 
 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
 {
 	return mulhdu(ct, __cputime_jiffies_factor);
 }
 
+/* Estimate the scaled cputime by scaling the real cputime based on
+ * the last scaled to real ratio */
+static inline cputime_t cputime_to_scaled(const cputime_t ct)
+{
+	if (cpu_has_feature(CPU_FTR_SPURR) &&
+	    per_cpu(cputime_last_delta, smp_processor_id()))
+		return ct *
+			per_cpu(cputime_scaled_last_delta, smp_processor_id())/
+			per_cpu(cputime_last_delta, smp_processor_id());
+	return ct;
+}
+
 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
 {
 	cputime_t ct;
@@ -74,6 +89,23 @@ static inline cputime_t jiffies_to_cputime(const unsigned long jif)
 	return ct;
 }
 
+static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
+{
+	cputime_t ct;
+	u64 sec;
+
+	/* have to be a little careful about overflow */
+	ct = jif % HZ;
+	sec = jif / HZ;
+	if (ct) {
+		ct *= tb_ticks_per_sec;
+		do_div(ct, HZ);
+	}
+	if (sec)
+		ct += (cputime_t) sec * tb_ticks_per_sec;
+	return ct;
+}
+
 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
 {
 	return mulhdu(ct, __cputime_jiffies_factor);