Randall Spangler 108754005d Fix potential deadlock in udelay() ...

If interrupts are disabled and the deadline is across a 32-bit timer
boundary from the current time, udelay() can lock up.  The fix is to
do 32-bit math directly in udelay().

BUG=chrome-os-partner:16472
BRANCH=link
TEST=manual

waitms 1 -> prompt returns almost instantly
waitms 500 -> prompt returns after 0.5 sec
waitms 1000 -> watchdog error printed, then prompt returns
waitms 2000 -> watchdog reboot

Change-Id: Ib8ca06cee414d48900c0142e629daa68aa0993c9
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/38924
Reviewed-by: Yung-Chieh Lo <yjlou@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

2012-11-29 12:02:28 -08:00

..

include

Sqrt function for Cortex-M

2012-02-16 05:43:29 +08:00

atomic.h

Move externs from .lds file into a header file

2012-04-19 14:29:07 -07:00

build.mk

Prevent GCC4.7 from generating unaligned memory accesses

2012-11-27 15:55:15 -08:00

cpu.c

Clean up core routines - cpu, task, watchdog

2012-10-29 12:02:41 -07:00

cpu.h

cpu: Enable reporting of faults

2012-07-02 15:02:07 -07:00

ec.lds.S

Add per-second hook

2012-10-30 15:33:25 -07:00

init.S

Enable FPU support for Link EC

2012-10-02 10:52:54 -07:00

link_defs.h

Add per-second hook

2012-10-30 15:33:25 -07:00

panic.c

Consolidate emergency debug output

2012-10-29 10:36:05 -07:00

switch.S

Enable FPU support for Link EC

2012-10-02 10:52:54 -07:00

task.c

Clean up core routines - cpu, task, watchdog

2012-10-29 12:02:41 -07:00

timer.c

Fix potential deadlock in udelay()

2012-11-29 12:02:28 -08:00

watchdog.c

Watchdog is reloaded by HOOK_TICK, not its own task

2012-10-30 15:33:24 -07:00