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target/cortex_m: restore C_MASKINTS after reset 

The cortex_m maskisr user-facing setting is not changed across a target
reset. However, the in-core C_MASKINTS bit was always cleared as part of
reset processing, meaning that a cortex_m maskisr on setting would not
be respected after a reset. Set C_MASKINTS based on the user-facing
setting value rather than always clearing it after reset.

Change-Id: I5aa5b9dfde04a0fb9c6816fa55b5ef1faf39f8de
Signed-off-by: Christopher Head <chead@zaber.com>
Reviewed-on: http://openocd.zylin.com/4605
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Christopher Head 2018-07-17 13:55:55 -07:00 committed by Tomas Vanek
parent 45f0c15912
commit c6cc60e0e1
1 changed files with 5 additions and 2 deletions
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7
src/target/cortex_m.c
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@ -237,8 +237,11 @@ static int cortex_m_endreset_event(struct target *target)
return retval;
}
/* clear any interrupt masking */
cortex_m_write_debug_halt_mask(target, 0, C_MASKINTS);
/* Restore proper interrupt masking setting. */
if (cortex_m->isrmasking_mode == CORTEX_M_ISRMASK_ON)
cortex_m_write_debug_halt_mask(target, C_MASKINTS, 0);
else
cortex_m_write_debug_halt_mask(target, 0, C_MASKINTS);
/* Enable features controlled by ITM and DWT blocks, and catch only
* the vectors we were told to pay attention to.