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hla_target: allow non-intrusive profiling on cortex-m

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Leverages the existing work that added profiling via DWT_PCSR.

hla_target doesn't have direct access to the mem_ap for doing a bulk
repeated read, but simply reading the DWT_PCSR register repeatedly is
still ~2 order of magnitude faster than halt/resume.

Change-Id: Ibe451aa95143694398370fdad6939cfb6191d56f
Signed-off-by: Karl Palsson <karlp@tweak.net.au>
Reviewed-on: http://openocd.zylin.com/4220
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
This commit is contained in:
Karl Palsson
2017-09-08 10:49:30 +00:00
committed by Paul Fertser
parent 64b0d5aac0
commit 4e0371bf71
3 changed files with 14 additions and 6 deletions
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2
src/target/cortex_m.h
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@@ -213,5 +213,7 @@ void cortex_m_enable_breakpoints(struct target *target);
void cortex_m_enable_watchpoints(struct target *target);
void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target);
void cortex_m_deinit_target(struct target *target);
int cortex_m_profiling(struct target *target, uint32_t *samples,
uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
#endif /* OPENOCD_TARGET_CORTEX_M_H */