diff options
Diffstat (limited to 'src/target/cortex_m3.c')
| -rw-r--r-- | src/target/cortex_m3.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c index adce4d9c..3bbe42c9 100644 --- a/src/target/cortex_m3.c +++ b/src/target/cortex_m3.c @@ -416,6 +416,21 @@ static int cortex_m3_poll(struct target *target) return retval; } + /* Recover from lockup. See ARMv7-M architecture spec, + * section B1.5.15 "Unrecoverable exception cases". + * + * REVISIT Is there a better way to report and handle this? + */ + if (cortex_m3->dcb_dhcsr & S_LOCKUP) { + LOG_WARNING("%s -- clearing lockup after double fault", + target_name(target)); + cortex_m3_write_debug_halt_mask(target, C_HALT, 0); + target->debug_reason = DBG_REASON_DBGRQ; + + /* refresh status bits */ + mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + } + if (cortex_m3->dcb_dhcsr & S_RESET_ST) { /* check if still in reset */ |