+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# common script for stm32l5x and stm32u5x families
+
+# Work-area is a space in RAM used for flash programming
+# By default use 64kB
+if { [info exists WORKAREASIZE] } {
+ set _WORKAREASIZE $WORKAREASIZE
+} else {
+ set _WORKAREASIZE 0x10000
+}
+
+#jtag scan chain
+if { [info exists CPUTAPID] } {
+ set _CPUTAPID $CPUTAPID
+} else {
+ if { [using_jtag] } {
+ # STM32L5x: RM0438 Rev5, Section 52.2.8 JTAG debug port - Table 425. JTAG-DP data registers
+ # STM32U5x: RM0456 Rev1, Section 65.2.8 JTAG debug port - Table 661. JTAG-DP data registers
+ # Corresponds to Cortex®-M33 JTAG debug port ID code
+ set _CPUTAPID 0x0ba04477
+ } {
+ # SWD IDCODE (single drop, arm)
+ set _CPUTAPID 0x0be12477
+ }
+}
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
+
+if {[using_jtag]} {
+ jtag newtap $_CHIPNAME bs -irlen 5
+}
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -endian little -dap $_CHIPNAME.dap
+
+# use non-secure RAM by default
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+# create sec/ns flash and otp memories (sizes will be probed)
+flash bank $_CHIPNAME.flash_ns stm32l4x 0x08000000 0 0 0 $_TARGETNAME
+flash bank $_CHIPNAME.flash_alias_s stm32l4x 0x0C000000 0 0 0 $_TARGETNAME
+flash bank $_CHIPNAME.otp stm32l4x 0x0BFA0000 0 0 0 $_TARGETNAME
+
+# Common knowledge tells JTAG speed should be <= F_CPU/6.
+# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on
+# the safe side.
+#
+# Note that there is a pretty wide band where things are
+# more or less stable, see http://review.openocd.org/3366
+adapter speed 500
+
+adapter srst delay 100
+if {[using_jtag]} {
+ jtag_ntrst_delay 100
+}
+
+reset_config srst_nogate
+
+if {![using_hla]} {
+ # if srst is not fitted use SYSRESETREQ to
+ # perform a soft reset
+ cortex_m reset_config sysresetreq
+}
+
+proc stm32x5x_is_secure {} {
+ # read Debug Security Control and Status Register (DSCSR) and check CDS (bit 16)
+ set DSCSR [mrw 0xE000EE08]
+ return [expr {($DSCSR & (1 << 16)) != 0}]
+}
+
+proc stm32x5x_ahb_ap_non_secure_access {} {
+ # 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
+}
+
+$_TARGETNAME configure -event reset-start {
+ # Reset clock is MSI (4 MHz)
+ adapter speed 480
+}
+
+$_TARGETNAME configure -event examine-end {
+ # DBGMCU_CR |= DBG_STANDBY | DBG_STOP
+ mmw 0xE0044004 0x00000006 0
+
+ # Stop watchdog counters during halt
+ # DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
+ mmw 0xE0044008 0x00001800 0
+}
+
+$_TARGETNAME configure -event halted {
+ set secure [stm32x5x_is_secure]
+
+ if {$secure} {
+ set secure_str "Secure"
+ stm32x5x_ahb_ap_secure_access
+ } else {
+ set secure_str "Non-Secure"
+ stm32x5x_ahb_ap_non_secure_access
+ }
+
+ # print the secure state only when it changes
+ set _TARGETNAME [target current]
+ global $_TARGETNAME.secure
+
+ if {![info exists $_TARGETNAME.secure] || $secure != [set $_TARGETNAME.secure]} {
+ echo "CPU in $secure_str state"
+ # update saved security state
+ set $_TARGETNAME.secure $secure
+ }
+}
+
+$_TARGETNAME configure -event gdb-flash-erase-start {
+ set use_secure_workarea 0
+ # check if FLASH_OPTR.TZEN is enabled
+ set FLASH_OPTR [mrw 0x40022040]
+ if {[expr {$FLASH_OPTR & 0x80000000}] == 0} {
+ echo "TZEN option bit disabled"
+ stm32x5x_ahb_ap_non_secure_access
+ } else {
+ stm32x5x_ahb_ap_secure_access
+ echo "TZEN option bit enabled"
+
+ # check if FLASH_OPTR.RDP is not Level 0.5
+ if {[expr {$FLASH_OPTR & 0xFF}] != 0x55} {
+ set use_secure_workarea 1
+ }
+ }
+
+ set _TARGETNAME [target current]
+ set workarea_addr [$_TARGETNAME cget -work-area-phys]
+ echo "workarea_addr $workarea_addr"
+
+ if {$use_secure_workarea} {
+ set workarea_addr [expr {$workarea_addr | 0x10000000}]
+ } else {
+ set workarea_addr [expr {$workarea_addr & ~0x10000000}]
+ }
+
+ $_TARGETNAME configure -work-area-phys $workarea_addr
+}
+
+$_TARGETNAME configure -event trace-config {
+ # Set TRACE_IOEN; TRACE_MODE is set to async; when using sync
+ # change this value accordingly to configure trace pins
+ # assignment
+ mmw 0xE0044004 0x00000020 0
+}