This option prefixes every console line with the time in seconds since
power-up. It is inspired by the Linux kernel option PRINTK_TIME and uses
the same output format.
It can be used to measure the time taken by U-Boot to boot the kernel or
application. For example:
[ 0.003532] U-Boot 2009.03-rc1-00008-gfa74f69-dirty (mar 04 2009 - 14:18:39)
[ 0.011994]
[ 0.013694] CPU: AMCC PowerPC 440EPx Rev. A at 528 MHz (PLB=132, OPB=66,
EBC=66 MHz)
[ 0.023121] Security/Kasumi support
[ 0.028001] Bootstrap Option H - Boot ROM Location I2C (Addr 0x52)
[ 0.036075] Internal PCI arbiter enabled, PCI async ext clock used
[ 0.044142] 32 kB I-Cache 32 kB D-Cache
[ 0.049445] Board: Sequoia - AMCC PPC440EPx Evaluation Board, Rev. F, PCI=66
MHz
...
Signed-off-by: Benoît Monin <bmo...@adeneo.eu>
---
README | 5 +++++
common/console.c | 36 ++++++++++++++++++++++++++++++------
2 files changed, 35 insertions(+), 6 deletions(-)
diff --git a/README b/README
index d0a636e..848ff29 100644
--- a/README
+++ b/README
@@ -478,6 +478,11 @@ The following options need to be configured:
the "silent" environment variable. See
doc/README.silent for more information.
+ When CONFIG_PRINT_TIME is defined, all console messages
+ are prefixed with the time in second since power-up.
+ This option mimics the Linux kernel option PRINTK_TIME
+ and uses the same output format (ex: [ 0.049445] ...).
+
- Console Baudrate:
CONFIG_BAUDRATE - in bps
Select one of the baudrates listed in
diff --git a/common/console.c b/common/console.c
index 2add047..75f0f28 100644
--- a/common/console.c
+++ b/common/console.c
@@ -325,6 +325,17 @@ int tstc(void)
return serial_tstc();
}
+static void __putc(const char c)
+{
+ if (gd->flags & GD_FLG_DEVINIT) {
+ /* Send to the standard output */
+ fputc (stdout, c);
+ } else {
+ /* Send directly to the handler */
+ serial_putc (c);
+ }
+}
+
void putc(const char c)
{
#ifdef CONFIG_SILENT_CONSOLE
@@ -337,13 +348,20 @@ void putc(const char c)
return;
#endif
- if (gd->flags & GD_FLG_DEVINIT) {
- /* Send to the standard output */
- fputc(stdout, c);
- } else {
- /* Send directly to the handler */
- serial_putc(c);
+ __putc(c);
+#ifdef CONFIG_PRINT_TIME
+ if (c == '\n') {
+ unsigned long ms;
+ char tbuf[32];
+ int tlen;
+ int i;
+
+ ms = ticks2usec(get_ticks());
+ tlen = sprintf(tbuf, "[%5lu.%06lu] ", (ms / 1000000UL), (ms %
1000000UL));
+ for (i = 0; i < tlen; i++)
+ __putc(tbuf[i]);
}
+#endif
}
void puts(const char *s)
@@ -358,6 +376,11 @@ void puts(const char *s)
return;
#endif
+#ifdef CONFIG_PRINT_TIME
+ while (*s) {
+ putc(*s++);
+ }
+#else
if (gd->flags & GD_FLG_DEVINIT) {
/* Send to the standard output */
fputs(stdout, s);
@@ -365,6 +388,7 @@ void puts(const char *s)
/* Send directly to the handler */
serial_puts(s);
}
+#endif
}
void printf(const char *fmt, ...)
--
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