# SPDX-License-Identifier: GPL-2.0-or-later

#
# GigaDevice GD32VF103 target
#
# https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/
#

source [find mem_helper.tcl]

transport select jtag

if { [info exists CHIPNAME] } {
   set _CHIPNAME $CHIPNAME
} else {
   set _CHIPNAME gd32vf103
}

# The smallest RAM size 6kB (GD32VF103C4/T4/R4)
if { [info exists WORKAREASIZE] } {
   set _WORKAREASIZE $WORKAREASIZE
} else {
   set _WORKAREASIZE 0x1800
}

jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x1000563d

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME riscv -chain-position $_TARGETNAME

$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0

set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME stm32f1x 0x08000000 0 0 0 $_TARGETNAME

# DBGMCU_CR register cannot be set in examine-end event as the running RISC-V CPU
# does not allow the debugger to access memory.
# Stop watchdogs at least before flash programming.
$_TARGETNAME configure -event reset-init {
	# DBGMCU_CR |= DBG_WWDG_STOP | DBG_IWDG_STOP
	mmw 0xE0042004 0x00000300 0
}
