Alec Berg e541eeb294 cortex-m0: disallow rescheduling if task_start() has not yet run ...

Do not allow rescheduling tasks if task_start() has not been called.
This fixes a bug in which if console input occurs between uart_init()
and task_start(), the MCU crashes because uart_init() enables uart
interrupts which attempts to wake up the console task when RX data
is received, which then tries to task switch before we initialized
task scheduling.

BUG=chrome-os-partner:32561
BRANCH=samus
TEST=add while(1) loop to adc_init() to simulate stalled ADC
initialization. When stalled, send console character and observe
that without this CL MCU crashes, and with this CL the MCU does
not crash.

Change-Id: I34418e88ebe0063acf1cc55ab5a57b5fddcd9d23
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/221599
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

2014-10-07 01:29:33 +00:00

..

cortex-m

zinger: check RW firmware signature

2014-10-02 23:18:25 +00:00

cortex-m0

cortex-m0: disallow rescheduling if task_start() has not yet run

2014-10-07 01:29:33 +00:00

host

Slow down time when running unit tests

2014-10-04 21:08:38 +00:00

nds32

Add cprints() and ccprints()

2014-05-21 20:32:17 +00:00