riscv-openocd/tcl/target/nrf51.cfg

#
# script for Nordic nRF51 series, a Cortex-M0 chip
#

source [find target/swj-dp.tcl]

if { [info exists CHIPNAME] } {
   set _CHIPNAME $CHIPNAME
} else {
   set _CHIPNAME nrf51
}

if { [info exists ENDIAN] } {
   set _ENDIAN $ENDIAN
} else {
   set _ENDIAN little
}

# Work-area is a space in RAM used for flash programming
# By default use 16kB
if { [info exists WORKAREASIZE] } {
   set _WORKAREASIZE $WORKAREASIZE
} else {
   set _WORKAREASIZE 0x4000
}

if { [info exists CPUTAPID] } {
   set _CPUTAPID $CPUTAPID
} else {
   set _CPUTAPID 0x0bb11477
}

swj_newdap $_CHIPNAME cpu -expected-id $_CPUTAPID

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

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

if {![using_hla]} {
   # The chip supports standard ARM/Cortex-M0 SYSRESETREQ signal
   cortex_m reset_config sysresetreq
}

flash bank $_CHIPNAME.flash nrf51 0x00000000 0 1 1 $_TARGETNAME
flash bank $_CHIPNAME.uicr nrf51 0x10001000 0 1 1 $_TARGETNAME

#
#  The chip should start up from internal 16Mhz RC, so setting adapter
#  clock to 1Mhz should be OK
#
adapter_khz 1000

proc enable_all_ram {} {
	# nRF51822 Product Anomaly Notice (PAN) #16 explains that not all RAM banks
	# are reliably enabled after reset on some revisions (contrary to spec.) So after
	# resetting we enable all banks via the RAMON register
	mww 0x40000524 0xF
}
$_TARGETNAME configure -event reset-end {  enable_all_ram }