boards/riscv/hifive1/support/openocd.cfg

adapter speed  10000
adapter driver ftdi

ftdi device_desc "Dual RS232-HS"
ftdi vid_pid 0x0403 0x6010
ftdi layout_init 0x0008 0x000b
ftdi layout_signal nSRST -data 0x0020 -oe 0x0020

set _CHIPNAME riscv
jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x10e31913

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME riscv -chain-position $_TARGETNAME
$_TARGETNAME configure -work-area-phys 0x80000000 -work-area-size 10000 -work-area-backup 1

flash bank onboard_spi_flash fespi 0x20000000 0 0 0 $_TARGETNAME

proc hifive1-load {file} {
        flash protect 0 64 last off
        flash write_image erase $file
}

proc hifive1-reset-halt {} {
	halt
}

proc hifive1-post-verify {} {
	# `reset halt` not correctly works.
	# toggles the nSRST directly.
	ftdi set_signal nSRST 0
	ftdi set_signal nSRST z
	shutdown
}

$_TARGETNAME configure -event gdb-attach {
        halt
        gdb_breakpoint_override hard
}

$_TARGETNAME configure -event gdb-detach {
        resume
        shutdown
}