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cortexm: Poll for S_RESET_ST in DHCSR to detect release from reset.

This commit is contained in:
Gareth McMullin 2012-07-05 20:12:18 +12:00
parent 00c4dbfb11
commit 0c379744e9
1 changed files with 4 additions and 4 deletions
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8
src/cortexm.c
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@ -515,6 +515,9 @@ cortexm_reset(struct target_s *target)
jtagtap_srst();
/* Read DHCSR here to clear S_RESET_ST bit before reset */
adiv5_ap_mem_read(ap, CORTEXM_DHCSR);
/* Request system reset from NVIC: SRST doesn't work correctly */
/* This could be VECTRESET: 0x05FA0001 (reset only core)
* or SYSRESETREQ: 0x05FA0004 (system reset)
@ -523,10 +526,7 @@ cortexm_reset(struct target_s *target)
CORTEXM_AIRCR_VECTKEY | CORTEXM_AIRCR_SYSRESETREQ);
/* Poll for release from reset */
while(adiv5_ap_mem_read(ap, CORTEXM_AIRCR) &
(CORTEXM_AIRCR_VECTRESET | CORTEXM_AIRCR_SYSRESETREQ));
platform_delay(2);
while(adiv5_ap_mem_read(ap, CORTEXM_DHCSR) & CORTEXM_DHCSR_S_RESET_ST);
/* Reset DFSR flags */
adiv5_ap_mem_write(ap, CORTEXM_DFSR, CORTEXM_DFSR_RESETALL);