PowerPC common SMP startup and time base rework.

- make mftb() shared, rewrite in C, provide complementary mttb()
- adjust SMP startup per the above, additional comments, minor naming
  changes
- eliminate redundant TB defines, other minor cosmetics

Reviewed by:	marcel, nwhitehorn
Obtained from:	Freescale, Semihalf

1 files changed, 8 insertions, 11 deletions

diff --git a/sys/powerpc/aim/clock.c b/sys/powerpc/aim/clock.c
index 2d3eb60..0a5391f 100644
--- a/sys/powerpc/aim/clock.c
+++ b/sys/powerpc/aim/clock.c
@@ -148,22 +148,19 @@ decr_init(void)
 	mtmsr(msr);
 }
 
+#ifdef SMP
 void
-decr_tc_init(void)
+decr_ap_init(void)
 {
-	decr_timecounter.tc_frequency = ticks_per_sec;
-	tc_init(&decr_timecounter);
+
 }
+#endif
 
-static __inline u_quad_t
-mftb(void)
+void
+decr_tc_init(void)
 {
-	u_long		scratch;
-	u_quad_t	tb;
-
-	__asm ("1: mftbu %0; mftb %0+1; mftbu %1; cmpw 0,%0,%1; bne 1b"
-	      : "=r"(tb), "=r"(scratch));
-	return tb;
+	decr_timecounter.tc_frequency = ticks_per_sec;
+	tc_init(&decr_timecounter);
 }
 
 static unsigned