diff --git a/src/target/aarch64.c b/src/target/aarch64.c index dee16d116..8d23bcabc 100644 --- a/src/target/aarch64.c +++ b/src/target/aarch64.c @@ -2248,7 +2248,7 @@ static int aarch64_examine_first(struct target *target) struct aarch64_common *aarch64 = target_to_aarch64(target); struct armv8_common *armv8 = &aarch64->armv8_common; struct adiv5_dap *swjdp = armv8->arm.dap; - struct aarch64_private_config *pc; + struct aarch64_private_config *pc = target->private_config; int i; int retval = ERROR_OK; uint64_t debug, ttypr; @@ -2256,11 +2256,18 @@ static int aarch64_examine_first(struct target *target) uint32_t tmp0, tmp1, tmp2, tmp3; debug = ttypr = cpuid = 0; - /* Search for the APB-AB - it is needed for access to debug registers */ - retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap); - if (retval != ERROR_OK) { - LOG_ERROR("Could not find APB-AP for debug access"); - return retval; + if (pc == NULL) + return ERROR_FAIL; + + if (pc->adiv5_config.ap_num == DP_APSEL_INVALID) { + /* Search for the APB-AB */ + retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap); + if (retval != ERROR_OK) { + LOG_ERROR("Could not find APB-AP for debug access"); + return retval; + } + } else { + armv8->debug_ap = dap_ap(swjdp, pc->adiv5_config.ap_num); } retval = mem_ap_init(armv8->debug_ap); @@ -2335,10 +2342,6 @@ static int aarch64_examine_first(struct target *target) LOG_DEBUG("ttypr = 0x%08" PRIx64, ttypr); LOG_DEBUG("debug = 0x%08" PRIx64, debug); - if (target->private_config == NULL) - return ERROR_FAIL; - - pc = (struct aarch64_private_config *)target->private_config; if (pc->cti == NULL) return ERROR_FAIL; @@ -2491,6 +2494,7 @@ static int aarch64_jim_configure(struct target *target, Jim_GetOptInfo *goi) pc = (struct aarch64_private_config *)target->private_config; if (pc == NULL) { pc = calloc(1, sizeof(struct aarch64_private_config)); + pc->adiv5_config.ap_num = DP_APSEL_INVALID; target->private_config = pc; }