[rtems commit] Add ddb 'show timecounter' command.

[Jan Sommer]

Module:    rtems
Branch:    5
Commit:    c3fc52ec069e25de3168c6c6c15698cc55c711ec
Changeset: http://git.rtems.org/rtems/commit/?id=c3fc52ec069e25de3168c6c6c15698cc55c711ec

Author:    Konstantin Belousov <kib at FreeBSD.org>
Date:      Mon Jan 18 09:25:36 2021 +0200

Add ddb 'show timecounter' command.

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation

---

 cpukit/score/src/kern_tc.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c
index 6df3894..6fbb590 100644
--- a/cpukit/score/src/kern_tc.c
+++ b/cpukit/score/src/kern_tc.c
@@ -2447,7 +2447,6 @@ tc_fill_vdso_timehands(struct vdso_timehands *vdso_th)
 		enabled = 0;
 	return (enabled);
 }
-#endif /* __rtems__ */
 
 #ifdef COMPAT_FREEBSD32
 uint32_t
@@ -2474,3 +2473,34 @@ tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32)
 	return (enabled);
 }
 #endif
+
+#include "opt_ddb.h"
+#ifdef DDB
+#include <ddb/ddb.h>
+
+DB_SHOW_COMMAND(timecounter, db_show_timecounter)
+{
+	struct timehands *th;
+	struct timecounter *tc;
+	u_int val1, val2;
+
+	th = timehands;
+	tc = th->th_counter;
+	val1 = tc->tc_get_timecount(tc);
+	__compiler_membar();
+	val2 = tc->tc_get_timecount(tc);
+
+	db_printf("timecounter %p %s\n", tc, tc->tc_name);
+	db_printf("  mask %#x freq %ju qual %d flags %#x priv %p\n",
+	    tc->tc_counter_mask, (uintmax_t)tc->tc_frequency, tc->tc_quality,
+	    tc->tc_flags, tc->tc_priv);
+	db_printf("  val %#x %#x\n", val1, val2);
+	db_printf("timehands adj %#jx scale %#jx ldelta %d off_cnt %d gen %d\n",
+	    (uintmax_t)th->th_adjustment, (uintmax_t)th->th_scale,
+	    th->th_large_delta, th->th_offset_count, th->th_generation);
+	db_printf("  offset %jd %jd boottime %jd %jd\n",
+	    (intmax_t)th->th_offset.sec, (uintmax_t)th->th_offset.frac,
+	    (intmax_t)th->th_boottime.sec, (uintmax_t)th->th_boottime.frac);
+}
+#endif
+#endif /* __rtems__ */