TFTP booting is observed a little bit slow, especially when a USB
keyboard is installed.
The fix is to check whether Ctrl-C key is pressed every
CONFIG_CTRLC_POLL_MS ms.
If CONFIG_CTRLC_POLL_MS is not defined in configuration file, we
define it as 1000.
Signed-off-by: Jim Lin <ji...@nvidia.com>
---
common/console.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/common/console.c b/common/console.c
index bf73178..3339a93 100644
--- a/common/console.c
+++ b/common/console.c
@@ -524,9 +524,21 @@ int vprintf(const char *fmt, va_list args)
/* test if ctrl-c was pressed */
static int ctrlc_disabled = 0; /* see disable_ctrl() */
static int ctrlc_was_pressed = 0;
+#ifndef CONFIG_CTRLC_POLL_MS
+/*
+ * Process Ctrl-C every 1000 ms by default to improve performance
+ * (like TFTP boot) when interlaced with other tasks.
+ */
+#define CONFIG_CTRLC_POLL_MS 1000
+#endif
+static unsigned long ctrlc_ts = CONFIG_CTRLC_POLL_MS;
int ctrlc(void)
{
if (!ctrlc_disabled && gd->have_console) {
+ if (get_timer(ctrlc_ts) < CONFIG_CTRLC_POLL_MS)
+ return 0;
+ else
+ ctrlc_ts = get_timer(0);
if (tstc()) {
switch (getc()) {
case 0x03: /* ^C - Control C */
--
1.7.3
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