patch-2.4.0-test9 linux/include/asm-ppc/time.h

• Lines: 97
• Date: Sun Sep 17 09:48:08 2000
• Orig file: v2.4.0-test8/linux/include/asm-ppc/time.h
• Orig date: Thu Jul 13 09:42:51 2000

diff -u --recursive --new-file v2.4.0-test8/linux/include/asm-ppc/time.h linux/include/asm-ppc/time.h
@@ -12,11 +12,10 @@
 #include <asm/processor.h>
 
 /* time.c */
-extern unsigned decrementer_count;
-extern unsigned count_period_num;
-extern unsigned count_period_den;
-extern unsigned long mktime(unsigned int, unsigned int, unsigned int,
-			    unsigned int, unsigned int, unsigned int);
+extern unsigned tb_ticks_per_jiffy;
+extern unsigned tb_to_us;
+extern unsigned tb_last_stamp;
+
 extern void to_tm(int tim, struct rtc_time * tm);
 extern time_t last_rtc_update;
 
@@ -37,6 +36,80 @@
 #if defined(CONFIG_4xx)
 	mtspr(SPRN_PIT, val);
 #else
+#ifdef CONFIG_8xx_CPU6
+	set_dec_cpu6(val);
+#else
 	mtspr(SPRN_DEC, val);
 #endif
+#endif
+}
+
+/* Accessor functions for the timebase (RTC on 601) registers. */
+/* If one day CONFIG_POWER is added just define __USE_RTC as 1 */
+#ifdef CONFIG_6xx
+extern __inline__ int const __USE_RTC(void) {
+	return (mfspr(SPRN_PVR)>>16) == 1;
+}
+#else
+#define __USE_RTC() 0
+#endif
+
+extern __inline__ unsigned long get_tbl(void) {
+	unsigned long tbl;
+	asm volatile("mftb %0" : "=r" (tbl));
+	return tbl;
+}
+
+extern __inline__ unsigned long get_rtcl(void) {
+	unsigned long rtcl;
+	asm volatile("mfrtcl %0" : "=r" (rtcl));
+	return rtcl;
 }
+
+extern __inline__ unsigned get_native_tbl(void) {
+	if (__USE_RTC())
+		return get_rtcl();
+	else
+	  	return get_tbl();
+}
+
+/* On machines with RTC, this function can only be used safely
+ * after the timestamp and for 1 second. It is only used by gettimeofday
+ * however so it should not matter.
+ */
+extern __inline__ unsigned tb_ticks_since(unsigned tstamp) {
+	if (__USE_RTC()) {
+		int delta = get_rtcl() - tstamp;
+		return delta<0 ? delta + 1000000000 : delta;
+	} else {
+        	return get_tbl() - tstamp;
+	}
+}
+
+#if 0
+extern __inline__ unsigned long get_bin_rtcl(void) {
+      unsigned long rtcl, rtcu1, rtcu2;
+      asm volatile("\
+1:    mfrtcu  %0\n\
+      mfrtcl  %1\n\
+      mfrtcu  %2\n\
+      cmpw    %0,%2\n\
+      bne-    1b\n"
+      : "=r" (rtcu1), "=r" (rtcl), "=r" (rtcu2)
+      : : "cr0");
+      return rtcu2*1000000000+rtcl;
+}
+
+extern __inline__ unsigned binary_tbl(void) {
+      if (__USE_RTC())
+              return get_bin_rtcl();
+      else
+              return get_tbl();
+}
+#endif
+
+/* Use mulhwu to scale processor timebase to timeval */
+#define mulhwu(x,y) \
+({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
+
+unsigned mulhwu_scale_factor(unsigned, unsigned);