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target/cortex_m: Change sleep to running state 

When the core is in sleep mode, the core is no longer retiring
instructions. Cortext M remains in "unknown" state. This patch converts
sleep mode to "running" state.

Change-Id: I1e9b6c9be51fd0f1f6ce81af9b1f5f9f1f43c661
Signed-off-by: Kevin Yang <kangyang@google.com>
Reviewed-on: http://openocd.zylin.com/5921
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Tested-by: jenkins
This commit is contained in:
Kevin Yang 2020-11-04 10:39:29 -08:00 committed by Tomas Vanek
parent e44539d66c
commit 06c7a53f1f
2 changed files with 3 additions and 7 deletions
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8
src/target/cortex_m.c
View File

@ -656,13 +656,9 @@ static int cortex_m_poll(struct target *target)
}
}
/* REVISIT when S_SLEEP is set, it's in a Sleep or DeepSleep state.
* How best to model low power modes?
*/
if (target->state == TARGET_UNKNOWN) {
/* check if processor is retiring instructions */
if (cortex_m->dcb_dhcsr & S_RETIRE_ST) {
/* check if processor is retiring instructions or sleeping */
if (cortex_m->dcb_dhcsr & S_RETIRE_ST || cortex_m->dcb_dhcsr & S_SLEEP) {
target->state = TARGET_RUNNING;
retval = ERROR_OK;
}

2
src/target/target.h
View File

@ -47,7 +47,7 @@ struct gdb_fileio_info;
/*
* TARGET_UNKNOWN = 0: we don't know anything about the target yet
* TARGET_RUNNING = 1: the target is executing user code
* TARGET_RUNNING = 1: the target is executing or ready to execute user code
* TARGET_HALTED = 2: the target is not executing code, and ready to talk to the
* debugger. on an xscale it means that the debug handler is executing
* TARGET_RESET = 3: the target is being held in reset (only a temporary state,