[Skiboot] [PATCH 02/10] external/trace: Print timestamps in prlog()'s format

[Oliver O'Halloran]

Make the trace tool's output format match that of skiboot's prlog().
Printing a timebase tick count in hex isn't terribly useful and having
a common format makes correlating trace entries to log entries much
easier.

Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
---
 external/trace/dump_trace.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/external/trace/dump_trace.c b/external/trace/dump_trace.c
index 5a832c791fb6..c68eea894715 100644
--- a/external/trace/dump_trace.c
+++ b/external/trace/dump_trace.c
@@ -45,13 +45,18 @@ static void *ezalloc(size_t size)
 	return p;
 }
 
+#define TB_HZ 512000000ul
+
 static void display_header(const struct trace_hdr *h)
 {
 	static u64 prev_ts;
 	u64 ts = be64_to_cpu(h->timestamp);
 
-	printf("%16lx (+%8lx) [%03x] : ",
-	       ts, prev_ts ? (ts - prev_ts) : 0, be16_to_cpu(h->cpu));
+	printf("[%5lu.%09lu,%d] (+%8lx) [%03x] : ",
+		ts / TB_HZ, /* match the usual skiboot log header */
+		ts % TB_HZ,
+		h->type, /* hey why not */
+		prev_ts ? (ts - prev_ts) % TB_HZ : 0, be16_to_cpu(h->cpu));
 	prev_ts = ts;
 }
 
-- 
2.26.2