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aarch64: fix debug entry from EL0

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If we enter debug state from EL0, some registers are not accessible.
Temporarily move to EL1H and back to gain access. Also, fix
armv8_dpm_modeswitch() to not immediately restore the previous state
on elevating the privilege level.

Change-Id: Ic2a92109230ff4eb6834c00ef544397a5b7ad56a
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4461
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
This commit is contained in:
Matthias Welwarsky
2018-03-12 16:56:05 +01:00
committed by Matthias Welwarsky
parent 935f0c5cc2
commit ffd6b78a2c
5 changed files with 26 additions and 7 deletions
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src/target/armv8_dpm.h
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@@ -116,7 +116,7 @@ void armv8_dpm_report_wfar(struct arm_dpm *, uint64_t wfar);
#define PRCR_COREPURQ (1 << 3)
void armv8_dpm_report_dscr(struct arm_dpm *dpm, uint32_t dcsr);
void armv8_dpm_handle_exception(struct arm_dpm *dpm);
void armv8_dpm_handle_exception(struct arm_dpm *dpm, bool do_restore);
enum arm_state armv8_dpm_get_core_state(struct arm_dpm *dpm);
#endif /* OPENOCD_TARGET_ARM_DPM_H */