tcl/stm32l5x|u5x: support HLA adapters in non-secure mode only

instrument "target/stm32x5x_common.cfg" used by both STM32L5x/U5x
to support HLA adapters like "interface/stlink.cfg" in non-secure mode

if the device switches to secure mode, the debug session will be
stopped immediately (with an explanatory message).

Change-Id: I645fdd55e3448ef82d0ddcc396f42fd7b2f39ac3
Signed-off-by: Tarek BOCHKATI <[email protected]>
Reported-by: Patrik Bachan <[email protected]>
Fixes: https://sourceforge.net/p/openocd/tickets/317/
Reviewed-on: https://review.openocd.org/c/openocd/+/6546
Reviewed-by: Tomas Vanek <[email protected]>
Reviewed-by: Antonio Borneo <[email protected]>
Tested-by: jenkins

Author: tarek-bochkati

tcl/target/stm32x5x_common.cfg

@@ -58,7 +58,9 @@ if {[using_jtag]} {
 
 reset_config srst_nogate
 
-if {![using_hla]} {
+if {[using_hla]} {
+	echo "Warn : The selected adapter does not support debugging this device in secure mode"
+} else {
 	# if srst is not fitted use SYSRESETREQ to
 	# perform a soft reset
 	cortex_m reset_config sysresetreq
@@ -71,13 +73,18 @@ proc stm32x5x_is_secure {} {
 }
 
 proc stm32x5x_ahb_ap_non_secure_access {} {
-	# SPROT=1=Non Secure access, Priv=1
-	[[target current] cget -dap] apcsw 0x4B000000 0x4F000000
+	# in HLA mode, non-secure debugging is possible without changing the AP CSW
+	if {![using_hla]} {
+		# SPROT=1=Non Secure access, Priv=1
+		[[target current] cget -dap] apcsw 0x4B000000 0x4F000000
+	}
 }
 
 proc stm32x5x_ahb_ap_secure_access {} {
-	# SPROT=0=Secure access, Priv=1
-	[[target current] cget -dap] apcsw 0x0B000000 0x4F000000
+	if {![using_hla]} {
+		# SPROT=0=Secure access, Priv=1
+		[[target current] cget -dap] apcsw 0x0B000000 0x4F000000
+	}
 }
 
 $_TARGETNAME configure -event reset-start {